From akrherz at iastate.edu Fri Oct 1 11:00:05 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 1 Oct 2010 11:00:05 -0500 Subject: IEM Daily Bulletin Message-ID: <201010011600.o91G05L5004870@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 01 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-09-30 | Title : Landscape turns to brown | Date : 30 Sep 05:54 AM | Votes : Good: 38 Bad: 3 +---------------------------------------------- The featured image shows a comparison between a Terra MODIS satellite image from last month and yesterday. The landscape has gone from a lush green to a dull brown, which is a good thing since it means the agricultural crops are drying up to support their harvest. This change also has an implication for how effectively the sun is able to warm the surface up (albedo). Maybe in another month or two this comparison would show the landscape turning white, but lets enjoy the fall season first! > NWS Watch/Warning Summary for 30 Sep 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 26 0 | 0 0 0 0 0 | 2 Svr Tstorm 19 0 | 0 0 0 0 0 | 0 Fl Flood 44 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 45 Verified: 8 [17.8 %] Reduction of Size Versus County Based [68.2 %] Average Perimeter Ratio [18.2 %] Percentage of Warned Area Verified (15km) [7.5 %] Average Storm Based Warning Size [1226 sq km] Probability of Detection(higher is better)[0.65] False Alarm Ratio (lower is better) [0.82] Critical Success Index (higher is better) [0.16] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat Oct 2 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 2 Oct 2010 11:00:04 -0500 Subject: IEM Daily Bulletin Message-ID: <201010021600.o92G0421000558@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 02 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-01 | Title : Frequency of clouds | Date : 01 Oct 05:47 AM | Votes : Good: 39 Bad: 10 +---------------------------------------------- The featured chart presents the hourly frequency of cloudy or mostly cloudy skies by day of the year based on observation data at the Des Moines Airport. The plot has a number of interesting features about the diurnal and annual cycles in Iowa. Firstly, a good number of our clouds are a result of day time heating by the sun. The late summer and fall months show up nicely for having fewer clouds during the night time. The forecast for the next 5-7 days continues to keep most of the clouds away with very pleasant fall weather! > NWS Watch/Warning Summary for 01 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 6 0 | 0 0 0 0 0 | 0 Fl Flood 8 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 6 Verified: 0 [0.0 %] Reduction of Size Versus County Based [90.1 %] Average Perimeter Ratio [11.6 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [1535 sq km] Probability of Detection(higher is better)[0.00] False Alarm Ratio (lower is better) [1.00] Critical Success Index (higher is better) [0.00] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Oct 3 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 3 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010031600.o93G03wK022142@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 03 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 02 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 10 0 | 0 0 0 0 0 | 0 Fl Flood 4 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 10 Verified: 4 [40.0 %] Reduction of Size Versus County Based [94.4 %] Average Perimeter Ratio [5.1 %] Percentage of Warned Area Verified (15km) [21.2 %] Average Storm Based Warning Size [1444 sq km] Probability of Detection(higher is better)[0.92] False Alarm Ratio (lower is better) [0.60] Critical Success Index (higher is better) [0.39] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon Oct 4 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 4 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010041600.o94G03vv012441@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 04 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 03 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 4 0 | 0 0 0 0 0 | 0 Fl Flood 5 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 4 Verified: 0 [0.0 %] Reduction of Size Versus County Based [98.8 %] Average Perimeter Ratio [0.0 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [582 sq km] Probability of Detection(higher is better)[0.00] False Alarm Ratio (lower is better) [1.00] Critical Success Index (higher is better) [0.00] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue Oct 5 11:00:06 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 5 Oct 2010 11:00:06 -0500 Subject: IEM Daily Bulletin Message-ID: <201010051600.o95G06sg027035@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 05 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-04 | Title : Where to go for warmest weather? | Date : 04 Oct 07:44 AM | Votes : Good: 31 Bad: 9 +---------------------------------------------- With the past two mornings being frosty ones in parts of Iowa, one may wish to find the warmest spot in Iowa. The featured image presents the frequency of a climate location in the state having the warmest temperature for any given day. The plot shows three favored locations: far southeast Iowa, southwest Iowa, or along the Missouri River near Sioux City. The least frequent being far northeast Iowa. > NWS Watch/Warning Summary for 04 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 17 0 | 0 0 0 0 0 | 1 Fl Flood 13 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 17 Verified: 2 [11.8 %] Reduction of Size Versus County Based [95.2 %] Average Perimeter Ratio [9.4 %] Percentage of Warned Area Verified (15km) [4.1 %] Average Storm Based Warning Size [1819 sq km] Probability of Detection(higher is better)[0.29] False Alarm Ratio (lower is better) [0.88] Critical Success Index (higher is better) [0.09] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed Oct 6 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 6 Oct 2010 11:00:04 -0500 Subject: IEM Daily Bulletin Message-ID: <201010061600.o96G042k019525@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 06 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-05 | Title : Where to find the coldest weather? | Date : 05 Oct 06:57 AM | Votes : Good: 23 Bad: 6 +---------------------------------------------- Yesterday's feature looked at the warmest spots in the state and today's feature shows the favored spots in the state with the lowest daily minimum temperature. This plot nicely shows some topographic effects that even occur in a flat state like Iowa. Northeast Iowa is the relatively cool, but the observation sites in the Mississippi River valley are sheltered some by the warm water during the fall season. Northwest Iowa is another location and it extends down into westcentral Iowa along the Nishnabotna Valley. > NWS Watch/Warning Summary for 05 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 1 0 | 0 0 0 0 0 | 0 Svr Tstorm 34 0 | 0 0 0 0 0 | 1 Fl Flood 7 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 34 Verified: 11 [32.4 %] Reduction of Size Versus County Based [94.5 %] Average Perimeter Ratio [6.1 %] Percentage of Warned Area Verified (15km) [11.8 %] Average Storm Based Warning Size [1900 sq km] Probability of Detection(higher is better)[0.78] False Alarm Ratio (lower is better) [0.68] Critical Success Index (higher is better) [0.30] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Oct 7 11:00:08 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 7 Oct 2010 11:00:08 -0500 Subject: IEM Daily Bulletin Message-ID: <201010071600.o97G08rj017617@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 07 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-06 | Title : Where to find the wettest weather? | Date : 06 Oct 06:58 AM | Votes : Good: 14 Bad: 6 +---------------------------------------------- Continuing on the series of features looking at where in Iowa extreme daily weather occurs, this image shows the frequency of a site having the heaviest precipitation for a given day. The plot can be misleading as the smallest percentages are in the middle and increase as one approaches the state border. This pattern shows how some storm systems will clip the state, so locations near the border will pick up the most precipitation while others will receive less. Interestingly, this storm system clipping appears to be the most common to the southeast, where Burlington will get the most. > NWS Watch/Warning Summary for 06 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 30 0 | 0 0 0 0 0 | 2 Svr Tstorm 48 0 | 0 0 0 0 0 | 2 Fl Flood 13 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 78 Verified: 18 [23.1 %] Reduction of Size Versus County Based [95.8 %] Average Perimeter Ratio [10.0 %] Percentage of Warned Area Verified (15km) [7.3 %] Average Storm Based Warning Size [1839 sq km] Probability of Detection(higher is better)[0.78] False Alarm Ratio (lower is better) [0.77] Critical Success Index (higher is better) [0.22] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Oct 8 11:00:08 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 8 Oct 2010 11:00:08 -0500 Subject: IEM Daily Bulletin Message-ID: <201010081600.o98G08nv021431@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 08 October 2010 > News +---------------------------------------------- | Title : Sep ASOS Data Uploaded | Date : 08 Oct 07:21 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/request/asos/1min.phtml +----------------------------------------------

The one minute interval Iowa ASOS data for September has been uploaded to the IEM data coffers. Data for Omaha, Sioux Falls, and Moline are available as well. +---------------------------------------------- | Title : Sep AWOS Data Uploaded | Date : 07 Oct 06:17 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/request/awos/1min.php +----------------------------------------------

The one minute interval Iowa AWOS data provided by the Department of Transportation has been uploaded to the IEM and available for download and use. Enjoy! > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-07 | Title : Streaks without precipitation | Date : 07 Oct 06:53 AM | Votes : Good: 19 Bad: 5 +---------------------------------------------- Our remarkable stretch of dry and warm weather continues this October with most locations experiencing no rainfall for the past week or so. The featured chart presents the longest streaks of having little to no precipitation for each day of the year. The lower chart simply presents the maximum daily rainfall. During the summer time, the longest streaks are only 3-4 weeks long, while they can last much longer in the fall and winter time. Our dry weather looks to continue into next week! > NWS Watch/Warning Summary for 07 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 1 0 | 0 0 0 0 0 | 0 Svr Tstorm 8 0 | 0 0 0 0 0 | 1 Fl Flood 18 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 9 Verified: 0 [0.0 %] Reduction of Size Versus County Based [79.6 %] Average Perimeter Ratio [32.8 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [2869 sq km] Probability of Detection(higher is better)[0.00] False Alarm Ratio (lower is better) [1.00] Critical Success Index (higher is better) [0.00] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat Oct 9 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 9 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010091600.o99G03jr009259@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 09 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-08 | Title : Kicking up dust | Date : 08 Oct 05:54 AM | Votes : Good: 29 Bad: 11 +---------------------------------------------- The featured image shows a comparison between the morning and afternoon MODIS true color satellite imagery on Wednesday. If you look closely, the afternoon imagery has a light vale overlain. The imagery is showing all of the dust being kicked up by the intense agricultural harvest activity ongoing. The continued dry and warm weather is allowing the rapid progress to be made and saving farmer's money by lowering crop drying costs as the ambient air is very warm already! High temperatures today are expected to be in the lower 80s! > NWS Watch/Warning Summary for 08 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 8 0 | 0 0 0 0 0 | 0 Fl Flood 9 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 8 Verified: 8 [100.0 %] Reduction of Size Versus County Based [68.1 %] Average Perimeter Ratio [33.5 %] Percentage of Warned Area Verified (15km) [21.3 %] Average Storm Based Warning Size [4267 sq km] Probability of Detection(higher is better)[0.76] False Alarm Ratio (lower is better) [0.00] Critical Success Index (higher is better) [0.76] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Oct 10 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 10 Oct 2010 11:00:04 -0500 Subject: IEM Daily Bulletin Message-ID: <201010101600.o9AG04Hw016519@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 10 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 09 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 4 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 4 Verified: 2 [50.0 %] Reduction of Size Versus County Based [79.9 %] Average Perimeter Ratio [38.9 %] Percentage of Warned Area Verified (15km) [24.0 %] Average Storm Based Warning Size [1391 sq km] Probability of Detection(higher is better)[1.00] False Alarm Ratio (lower is better) [0.50] Critical Success Index (higher is better) [0.50] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon Oct 11 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 11 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010111600.o9BG0318001505@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 11 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 10 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 18 0 | 0 0 0 0 0 | 1 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 18 Verified: 6 [33.3 %] Reduction of Size Versus County Based [78.9 %] Average Perimeter Ratio [19.4 %] Percentage of Warned Area Verified (15km) [19.1 %] Average Storm Based Warning Size [1195 sq km] Probability of Detection(higher is better)[0.68] False Alarm Ratio (lower is better) [0.67] Critical Success Index (higher is better) [0.29] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed Oct 13 11:00:05 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 13 Oct 2010 11:00:05 -0500 Subject: IEM Daily Bulletin Message-ID: <201010131600.o9DG05ne000851@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 13 October 2010 > News +---------------------------------------------- | Title : Feb COOP data uploaded | Date : 13 Oct 10:06 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/climodat/ +----------------------------------------------

The quality controlled Iowa COOP data for February 2010 has been uploaded to the IEM. These observations are kindly provided by Harry Hillaker, our state climatologist, who passes along these notes on the month:

February temperatures averaged 16.8 degrees or 7.4 degrees below normal. Precipitation averaged 0.99 inches or 0.01 inch above normal. This ranks as the 20th coolest and 68th wettest February among 138 years of state averages. Snowfall averaged 14.4 inches or 8.1 inches above normal to rank as the 6th highest February total among 123 years of records. The 2009-2010 winter season (Dec. 1 to Feb. 28) averaged 16.6 degrees or 4.9 degrees below normal while precipitation averaged 5.05 inches or 1.89 inches above normal. This ranks as the 17th coolest and 9th wettest winter among 137 years of state averages.

The following is the number of new daily records set at COOP sites based on data back to 1951. 

                 ___2010 ____________2009___________________
                 FEB  JAN  DEC  NOV  OCT  SEP  AUG  JUL  JUN
Maximum High:      0    0    0    2    0    0    0    0   25
Minimum High:      6   97   24    0  396    1  150  235   67
Maximum Low:       0   18    3   74    2    0   12    0   35
Minimum Low:      38  131   41    0   35   21  103  144    4
Maximum Precip:   25  151  193   45  161   25   65   58   41

The following is some bulk statistics on how well IEM's daily COOP data estimator is performing on a monthly basis versus this QC'd dataset. No code changes were made. 

                 _____2010_________________________2009______
                 FEB   JAN   DEC   NOV   OCT   SEP   AUG   JUL 
High Temp Bias   1.4   1.3   0.8   0.9   0.8   0.9   0.3   0.7
High Temp RMSE   1.7   1.6   1.1   1.2   1.1   1.3   1.0   1.2
Low  Temp Bias   2.0   1.9   1.3   1.1   1.2   0.8   1.0   0.7
Low  Temp RMSE   2.4   2.1   1.7   1.6   1.6   1.7   1.6   1.3
Precip    Bias  -0.61 -0.47 -1.41 -0.22 -1.10 -0.15 -0.71 -0.47
Precip    RMSE   0.61  0.50  1.44  0.33  1.14  0.41  1.04  0.72

The Climodat reports referenced from this news item are summaries of this daily data. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-12 | Title : Finally broke some record highs | Date : 12 Oct 05:50 AM | Votes : Good: 18 Bad: 5 +---------------------------------------------- The featured map presents the number of days since the last tie or set of a daily record high temperature. According to IEM calculations, most of Iowa tied or set record highs this past weekend, but a few locations did not. Places like Ames (707) have gone nearly two years without setting a record high. Our warm weather looks to continue, but will not be record setting. > NWS Watch/Warning Summary for 12 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 1 0 | 0 0 0 0 0 | 0 Svr Tstorm 69 0 | 0 0 0 0 0 | 1 Fl Flood 2 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 70 Verified: 23 [32.9 %] Reduction of Size Versus County Based [69.8 %] Average Perimeter Ratio [35.2 %] Percentage of Warned Area Verified (15km) [16.0 %] Average Storm Based Warning Size [1181 sq km] Probability of Detection(higher is better)[0.67] False Alarm Ratio (lower is better) [0.67] Critical Success Index (higher is better) [0.28] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Oct 14 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 14 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010141600.o9EG03bA018322@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 14 October 2010 > News +---------------------------------------------- | Title : DCP Plotting App | Date : 14 Oct 08:16 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/DCP/plot.phtml +----------------------------------------------

The IEM's archive of Iowa DCP data can now be dynamically plotted via the app linked in this news item. The DCP network includes most of the river gauges found in the stage. The plotting app is rather basic at the moment and presents the undecoded SHEF variable names. At some point, I'll figure out all the SHEF codes and provide that on the page as well. Unfortunately, finding another place on the web that generates archive charts like this appears to be near impossible. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-13 | Title : Broke our dry streak | Date : 13 Oct 05:47 AM | Votes : Good: 16 Bad: 4 +---------------------------------------------- The streak of dry weather ended for some on Tuesday as showers and thunderstorms visited Iowa again. For Des Moines, the streak was 16 days since the last measurable precipitation event. The featured chart presents the longest dry streak per year since 1893. Each year has seen at least one 10 day period of dry weather with the mean being around 3 weeks long. The bottom chart presents the number of dry streaks that last at least 7 days. The 2010 total is the lowest since 1998, but there are still 2.5 relatively dry months to go this year, so the total will probably be added to. > NWS Watch/Warning Summary for 13 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 9 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 9 Verified: 3 [33.3 %] Reduction of Size Versus County Based [72.4 %] Average Perimeter Ratio [36.3 %] Percentage of Warned Area Verified (15km) [20.3 %] Average Storm Based Warning Size [612 sq km] Probability of Detection(higher is better)[0.86] False Alarm Ratio (lower is better) [0.67] Critical Success Index (higher is better) [0.32] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Oct 15 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 15 Oct 2010 11:00:04 -0500 Subject: IEM Daily Bulletin Message-ID: <201010151600.o9FG04tY013932@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 15 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-14 | Title : Warm nights in the city | Date : 14 Oct 03:07 AM | Votes : Good: 30 Bad: 8 +---------------------------------------------- The featured chart displays the hourly average temperature difference by year between Des Moines and Waterloo. The chart nicely shows the effect of having a weather sensor in an urban area (Des Moines) versus a more rural one (waterloo). Notice how Des Moines is much warmer during the night time than during the daytime. This is probably a result of the Urban Heat Island Effect. If you are into warm nights, living in Des Moines is your best bet in Iowa. > NWS Watch/Warning Summary for 14 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 11 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 11 Verified: 8 [72.7 %] Reduction of Size Versus County Based [75.3 %] Average Perimeter Ratio [12.5 %] Percentage of Warned Area Verified (15km) [44.1 %] Average Storm Based Warning Size [1095 sq km] Probability of Detection(higher is better)[0.77] False Alarm Ratio (lower is better) [0.27] Critical Success Index (higher is better) [0.60] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat Oct 16 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 16 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010161600.o9GG03GP007671@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 16 October 2010 > News +---------------------------------------------- | Title : MOS Bias Charts | Date : 15 Oct 09:07 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/mos/ +----------------------------------------------

The IEM maintains an archive of Model Output Statistics (MOS) dating back to 2007. The MOS data contains forecasts of observation station temperatures. I'm now creating some simple maps depicting the current MOS temperature bias (MOS - obs) and these maps are available from the "time machine" app. If there is interest, I could probably back fill this archive back to 2007.

Current Plots

> Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-15 | Title : Hourly Temps | Date : 15 Oct 05:55 AM | Votes : Good: 35 Bad: 9 +---------------------------------------------- The colorful feature image presents the hourly temperature climatology by hour and day of the year for Des Moines based on 60 years of data. The plot shows our warmest time of the year during the mid afternoon in July and our coldest time of the year during the early morning hours in January. For mid October, you can see our warm afternoon temperatures are fleeting with cooler weather increasing with each passing day. Our actual weather looks to continue the pleasant weather streak with highs in the 60s and low 70s. > NWS Watch/Warning Summary for 15 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 1 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 1 Verified: 0 [0.0 %] Reduction of Size Versus County Based [79.2 %] Average Perimeter Ratio [0.0 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [4999 sq km] Probability of Detection(higher is better)[0.00] False Alarm Ratio (lower is better) [1.00] Critical Success Index (higher is better) [0.00] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Oct 17 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 17 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010171600.o9HG03hw003211@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 17 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-16 | Title : Daily Temperature Cycle | Date : 16 Oct 06:25 AM | Votes : Good: 24 Bad: 5 +---------------------------------------------- The featured chart presents the average daily diurnal temperature cycle. The values are the departure from the daily mean temperature. The chart nicely depicts the profile of when the warmest and coolest temperatures are each day. The magnitude of the values during the winter season are less due to the decreased power of the sun and dominance of warm and cold air advection not forced by the sun. This time of year and April see the strongest diurnal signal thanks to decreased amounts of water vapor in the air (warms and cools more quickly). > NWS Watch/Warning Summary for 16 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 0 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon Oct 18 11:00:08 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 18 Oct 2010 11:00:08 -0500 Subject: IEM Daily Bulletin Message-ID: <201010181600.o9IG08pG002410@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 18 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 17 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 0 0 | 0 0 0 0 0 | 0 Fl Flood 3 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue Oct 19 11:00:05 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 19 Oct 2010 11:00:05 -0500 Subject: IEM Daily Bulletin Message-ID: <201010191600.o9JG05nM009440@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 19 October 2010 > News +---------------------------------------------- | Title : GOES Satellite Tile Map Service | Date : 18 Oct 04:33 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/ogc/ +----------------------------------------------

The IEM has added three new Tile Map Service (TMS) layers to its tile cache setup (high speed tile service for web mapping apps). These layers are composites of GOES Satellite imagery over the CONUS and include visible, infrared, and water vapor channels. The linked page in this news item has the links to the new tile cache services.

I also added corresponding "spherical mercator" layers to the three GOES Web Map Service (WMS) layers. They are denoted with "-900913" layer names.

If you have any troubles or suggestions, please let me know. Enjoy! > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-18 | Title : Monthly patterns | Date : 18 Oct 05:47 AM | Votes : Good: 22 Bad: 1 +---------------------------------------------- Continuing along looking at the diurnal cycle of temperatures, the featured graph presents the monthly average for six months out of the year. The weakest signal is shown in January and the strongest in September. It is interesting to contrast the patterns as September has the most rapid warming, but also the most rapid cooling. This is a result of still having significant sunshine, but also dry air allowing the rapid changes. It is curious to note how similiar July and May are. This analysis is based on minute interval data dating back to only 2000. > NWS Watch/Warning Summary for 18 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 6 0 | 0 0 0 0 0 | 0 Fl Flood 1 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 6 Verified: 1 [16.7 %] Reduction of Size Versus County Based [95.1 %] Average Perimeter Ratio [16.2 %] Percentage of Warned Area Verified (15km) [11.5 %] Average Storm Based Warning Size [757 sq km] Probability of Detection(higher is better)[0.50] False Alarm Ratio (lower is better) [0.83] Critical Success Index (higher is better) [0.14] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed Oct 20 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 20 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010201600.o9KG03jU003333@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 20 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-19 | Title : Changes in time | Date : 19 Oct 05:52 AM | Votes : Good: 22 Bad: 3 +---------------------------------------------- A final feature on the diurnal temperature cycle. This plot presents a crude analysis of when the low and high temperature occurs each day based on minute interval data. Some adjustment was done to the plot to remove cases of having the low or high temperature set at midnight. The plot nicely shows the annual cycle of when the low temperature occurs, which is typically just before sunrise. The high temperature is more constant and typically occurs around 4 PM CDT (or 3 PM during the winter time). Many people think the highest temperature occurs at noon when the sun is the most direct (highest in the sky), but since the net downward radiation is still positive well into the afternoon, we continue to warm. > NWS Watch/Warning Summary for 19 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 1 0 | 0 0 0 0 0 | 0 Svr Tstorm 21 0 | 0 0 0 0 0 | 0 Fl Flood 3 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 22 Verified: 2 [9.1 %] Reduction of Size Versus County Based [95.8 %] Average Perimeter Ratio [12.6 %] Percentage of Warned Area Verified (15km) [3.5 %] Average Storm Based Warning Size [1177 sq km] Probability of Detection(higher is better)[0.57] False Alarm Ratio (lower is better) [0.91] Critical Success Index (higher is better) [0.09] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Oct 21 11:00:26 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 21 Oct 2010 11:00:26 -0500 Subject: IEM Daily Bulletin Message-ID: <201010211600.o9LG0QDC023959@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 21 October 2010 > News +---------------------------------------------- | Title : Q2 Tile Map Service | Date : 20 Oct 04:47 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/ogc/ +----------------------------------------------

I've added some NMQ Q2 products to the IEM Tile Map Service. The NMQ project produces an exciting new high resolution precipitation dataset being processed and stored by the IEM. I've written some code to convert the data into a simple GIS raster image and am storing that in the IEM archives.

For realtime use, I have the most recent product available in simple WGS84 lat/lon and also the aforementioned TMS. Here is a simple screnshot showing the Q2 data within openlayers and google maps.

I wish to add a few more products as time allows and will be putting out some more documentation on the product. I'm trying to design the GIS rasters to be as easy to use as possible. For example, the 1 hour precip product has units of 1 mm per color index level.

If you are interested in this, please let me know. Enjoy. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-20 | Title : Driest October so far | Date : 20 Oct 05:47 AM | Votes : Good: 27 Bad: 2 +---------------------------------------------- After an extremely wet summer, October has certainly reversed the trend and been extremely dry! In fact, according to IEM estimates, the driest first 19 days of October statewide on record. The featured charts presents this year's paltry total of 0.05 inches. It was only 3 years ago that the largest statewide accumulation occured just under 5 inches! The forecast does have increased chances of rain, so maybe our total for the month will increase! > NWS Watch/Warning Summary for 20 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 2 0 | 0 0 0 0 0 | 0 Svr Tstorm 42 0 | 0 0 0 0 0 | 1 Fl Flood 1 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 40 Verified: 8 [20.0 %] Reduction of Size Versus County Based [93.4 %] Average Perimeter Ratio [14.1 %] Percentage of Warned Area Verified (15km) [7.2 %] Average Storm Based Warning Size [1785 sq km] Probability of Detection(higher is better)[0.82] False Alarm Ratio (lower is better) [0.80] Critical Success Index (higher is better) [0.19] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Oct 22 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 22 Oct 2010 11:00:04 -0500 Subject: IEM Daily Bulletin Message-ID: <201010221600.o9MG04xg009759@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 22 October 2010 > News +---------------------------------------------- | Title : Saylorville + Red Rock Wind Data | Date : 21 Oct 03:47 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/other/ +----------------------------------------------

The bridges that cross Saylorville Lake and Lake Red Rock have wind sensors on them to monitor winds in case they get too strong impacting high profile vehicles. This information is collected by CTRE here at ISU and kindly provided to the IEM for archival and dissemination. Currently, I just have a simple display of the current's days observation, but will improve in the future. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-21 | Title : Still avoiding cold air | Date : 21 Oct 05:53 AM | Votes : Good: 27 Bad: 6 +---------------------------------------------- The featured map presents the percentile value of lowest temperature so far this fall versus previous falls. A good portion of the state is shown over 90%, which means the minimum temperature this year has been warmer than 90% of the previous years. The forecast does not contain any cold air outbreaks, but our chances of rain will be increasing. > NWS Watch/Warning Summary for 21 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 6 0 | 0 0 0 0 0 | 0 Svr Tstorm 36 0 | 0 0 0 0 0 | 1 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 41 Verified: 15 [36.6 %] Reduction of Size Versus County Based [83.6 %] Average Perimeter Ratio [18.7 %] Percentage of Warned Area Verified (15km) [11.9 %] Average Storm Based Warning Size [1802 sq km] Probability of Detection(higher is better)[0.76] False Alarm Ratio (lower is better) [0.63] Critical Success Index (higher is better) [0.33] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat Oct 23 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 23 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010231600.o9NG03cU026301@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 23 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-22 | Title : Better October than last year | Date : 22 Oct 05:55 AM | Votes : Good: 29 Bad: 9 +---------------------------------------------- The featured graph presents the daily high temperatures for the last four months of the year for this year and last along with the climatology and a blue line indicating the latest day of the year to have experienced a given temperature. The blue dots for this October show how much warmer it has been than last year's cross symbols. Last year did see a very mild November, so perhaps this November will be payback for all the warm weather we experienced this year. Highs today will be in the mid to upper 70s, which is well above the average near 60. > NWS Watch/Warning Summary for 22 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 1 Svr Tstorm 8 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 8 Verified: 1 [12.5 %] Reduction of Size Versus County Based [67.0 %] Average Perimeter Ratio [31.9 %] Percentage of Warned Area Verified (15km) [6.6 %] Average Storm Based Warning Size [1287 sq km] Probability of Detection(higher is better)[0.50] False Alarm Ratio (lower is better) [0.88] Critical Success Index (higher is better) [0.11] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Oct 24 11:00:06 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 24 Oct 2010 11:00:06 -0500 Subject: IEM Daily Bulletin Message-ID: <201010241600.o9OG06lr018682@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 24 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 23 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 16 0 | 0 0 0 0 0 | 3 Svr Tstorm 41 4 | 0 0 2 0 4 | 1 Fl Flood 8 1 | 0 0 0 0 1 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 57 Verified: 17 [29.8 %] Reduction of Size Versus County Based [69.4 %] Average Perimeter Ratio [36.2 %] Percentage of Warned Area Verified (15km) [13.2 %] Average Storm Based Warning Size [1787 sq km] Probability of Detection(higher is better)[0.91] False Alarm Ratio (lower is better) [0.70] Critical Success Index (higher is better) [0.29] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon Oct 25 11:00:08 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 25 Oct 2010 11:00:08 -0500 Subject: IEM Daily Bulletin Message-ID: <201010251600.o9PG08q3017580@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 25 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 24 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 33 0 | 0 0 0 0 0 | 1 Svr Tstorm 157 0 | 0 0 0 0 0 | 3 Fl Flood 5 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 182 Verified: 86 [47.3 %] Reduction of Size Versus County Based [68.7 %] Average Perimeter Ratio [32.4 %] Percentage of Warned Area Verified (15km) [20.4 %] Average Storm Based Warning Size [1553 sq km] Probability of Detection(higher is better)[0.84] False Alarm Ratio (lower is better) [0.53] Critical Success Index (higher is better) [0.43] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue Oct 26 11:00:08 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 26 Oct 2010 11:00:08 -0500 Subject: IEM Daily Bulletin Message-ID: <201010261600.o9QG08So017167@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 26 October 2010 > News +---------------------------------------------- | Title : NEXRAD Level II Latencies | Date : 26 Oct 05:33 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/current/radar.phtml +----------------------------------------------

The feed of NEXRAD Level II data to the IEM experienced latencies up to 45 minutes on Monday evening. The problem was upstream of us as shown by this latency chart of our upstream source:

Sorry about the troubles, but there was nothing much I could do. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-25 | Title : Slight risks return | Date : 25 Oct 05:09 AM | Votes : Good: 37 Bad: 11 +---------------------------------------------- The Storm Prediction Center issued a slight risk of severe weather over Iowa this past Saturday making for a month since the last such issuance for Iowa. The featured graph presents the daily areal coverage of slight convective risk over Iowa for this year and last. Interesting to see lack of slight risk from the middle of August 2009 until April of this year. Slight risk of severe weather is over the state again for Monday with this week representing a major change from the weather we have seen for the past month. > NWS Watch/Warning Summary for 25 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 22 0 | 0 0 0 0 0 | 5 Svr Tstorm 111 0 | 0 0 0 0 0 | 4 Fl Flood 1 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 129 Verified: 62 [48.1 %] Reduction of Size Versus County Based [55.9 %] Average Perimeter Ratio [44.9 %] Percentage of Warned Area Verified (15km) [20.7 %] Average Storm Based Warning Size [2061 sq km] Probability of Detection(higher is better)[0.79] False Alarm Ratio (lower is better) [0.52] Critical Success Index (higher is better) [0.43] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed Oct 27 11:00:23 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 27 Oct 2010 11:00:23 -0500 Subject: IEM Daily Bulletin Message-ID: <201010271600.o9RG0NF1004490@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 27 October 2010 > News +---------------------------------------------- | Title : 34 million hits | Date : 27 Oct 05:27 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/usage/ +----------------------------------------------

The IEM web farm hit another milestone yesterday processing just under 35 million hits thanks to the monster plains storm. Here is a listing of previous milestones. 

17 Jun 2001:    1rst hit
25 Jun 2001:      1,000+
19 Sep 2001:     10,000+
19 Mar 2004:    100,000+
25 May 2005:    200,000+
30 May 2006:    500,000+
29 Nov 2006:  1,000,000+
24 Feb 2007:  2,000,000+
17 Oct 2007:  3,000,000+
 5 Feb 2008:  4,000,000+
27 May 2008:  5,000,000+
 5 Jun 2008:  8,000,000+
15 Jul 2009: 10,000,000+
 7 Jan 2010: 15,000,000+
29 Jan 2010: 16,000,000+
 9 Feb 2010: 18,000,000+
23 Apr 2010: 19,000,000+
24 Apr 2010: 22,000,000+
14 May 2010: 23,000,000+
23 Jun 2010: 28,000,000+
23 Jul 2010: 31,000,000+
26 Oct 2010: 34,000,000+
> Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-26 | Title : Epic Pressure Falls | Date : 26 Oct 05:14 AM | Votes : Good: 44 Bad: 9 +---------------------------------------------- The featured plot presents the 24 hour difference in observed altimeter (atmospheric pressure) for the upper mid west. Values lower than 24 mb (bombogenesis criteria is 24+ mb drop in 24 hours) are highlighted. If you measure storm strength by the minimum pressure observed, this storm may go down as the most powerful storm on record in October and the strongest storm in 70 years. The altimeter reading at Des Moines 28.94 inches around 1 AM this morning. A value below 29 has only happened four times since 1977 for Des Moines.

Update: It was pointed out that bombogenesis refers to the center of the low pressure system dropping at the 24mb/24hr rate, looking at individual station data is not sufficient. > NWS Watch/Warning Summary for 26 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 227 0 | 0 0 0 0 0 | 11 Svr Tstorm 250 0 | 0 4 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 477 Verified: 170 [35.6 %] Reduction of Size Versus County Based [54.5 %] Average Perimeter Ratio [40.4 %] Percentage of Warned Area Verified (15km) [18.2 %] Average Storm Based Warning Size [2031 sq km] Probability of Detection(higher is better)[0.80] False Alarm Ratio (lower is better) [0.64] Critical Success Index (higher is better) [0.33] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Oct 28 11:00:07 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 28 Oct 2010 11:00:07 -0500 Subject: IEM Daily Bulletin Message-ID: <201010281600.o9SG07qA017509@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 28 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-27 | Title : A storm for the ages | Date : 27 Oct 05:09 AM | Votes : Good: 59 Bad: 7 +---------------------------------------------- The featured chart presents an IEM computed analysis of the surface low minimum pressure from Monday afternoon thru Tuesday. The low pressure center developed in Kansas and then rapidly intensified as it moved to the north and east into Minnesota. The values shown set various records for all time lowest pressure and may go down as the most powerful continental storm system in US History (as measured by pressure). The rapid intensification met the 'bombogenesis' criteria, which is an informal term that describes 'explosive' storm development by having its surface low center's pressure drop by 24+ mb in 24 hours. The primary impact of this storm on Iowa continues to be the strong winds which will continue today. Many parts of Eastern US felt this storms impact in the form of severe winds and tornados. > NWS Watch/Warning Summary for 27 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 63 0 | 0 0 0 0 0 | 7 Svr Tstorm 35 0 | 0 0 0 0 0 | 0 Fl Flood 6 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 98 Verified: 17 [17.3 %] Reduction of Size Versus County Based [68.5 %] Average Perimeter Ratio [36.0 %] Percentage of Warned Area Verified (15km) [11.8 %] Average Storm Based Warning Size [955 sq km] Probability of Detection(higher is better)[0.71] False Alarm Ratio (lower is better) [0.83] Critical Success Index (higher is better) [0.16] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Oct 29 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 29 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010291600.o9TG03Ka013674@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 29 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-28 | Title : First Flakes of Fall | Date : 28 Oct 05:52 AM | Votes : Good: 44 Bad: 4 +---------------------------------------------- The first snow flakes of the season where reported yesterday afternoon over extreme northwest Iowa thanks to our large storm system to the north. The featured chart presents the first fall occurence of snow as reported by the sensors at the larger Iowa airports and the human COOP observers. The average first occurence is around the first of November, so yesterday's snow is nothing exceptional. The winds are finally expected to die down some this evening with the coldest night of the season on the way for tonight. > NWS Watch/Warning Summary for 28 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 0 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat Oct 30 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 30 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010301600.o9UG03AO008815@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 30 October 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-10-29 | Title : 50 degree soils | Date : 29 Oct 05:53 AM | Votes : Good: 31 Bad: 8 +---------------------------------------------- Our mostly sunny and mild October has helped keep 4 inch depth soil temperatures well above 50 degrees which is a key threshold used for fall nitrogen application in fields (temperatures need to be colder than 50 to make the application successful). Our recent stretch of cool weather has allowed temperatures to dip below 50 for the first time this fall and as is shown in the featured chart, this makes for the latest date in the fall season for the first sub 50 degree to have occured based on our data back to the mid 80s. > NWS Watch/Warning Summary for 29 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 0 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Oct 31 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 31 Oct 2010 11:00:03 -0500 Subject: IEM Daily Bulletin Message-ID: <201010311600.o9VG03pc025941@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 31 October 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 30 Oct 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 0 0 | 0 0 0 0 0 | 0 Fl Flood 0 0 | 0 0 0 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: