From akrherz at iastate.edu Sun May 1 11:00:17 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 1 May 2011 11:00:17 -0500 Subject: IEM Daily Bulletin Message-ID: <201105011600.p41G0H4O024145@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 01 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 30 Apr 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 4 0 | 0 0 0 0 0 | 2 Svr Tstorm 23 0 | 0 0 0 0 0 | 0 Fl Flood 10 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: 27 Verified: 13 [48.1 %] Reduction of Size Versus County Based [71.0 %] Average Perimeter Ratio [15.6 %] Percentage of Warned Area Verified (15km) [18.8 %] Average Storm Based Warning Size [1538 sq km] Probability of Detection(higher is better)[1.00] False Alarm Ratio (lower is better) [0.52] Critical Success Index (higher is better) [0.48] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon May 2 11:02:07 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 2 May 2011 11:02:07 -0500 Subject: IEM Daily Bulletin Message-ID: <201105021602.p42G27BL015705@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 02 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 01 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 7 0 | 0 0 0 0 0 | 2 Svr Tstorm 94 0 | 0 0 0 0 0 | 2 Fl Flood 40 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: 101 Verified: 46 [45.5 %] Reduction of Size Versus County Based [63.9 %] Average Perimeter Ratio [21.9 %] Percentage of Warned Area Verified (15km) [15.8 %] Average Storm Based Warning Size [2153 sq km] Probability of Detection(higher is better)[0.82] False Alarm Ratio (lower is better) [0.54] Critical Success Index (higher is better) [0.41] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue May 3 11:00:11 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 3 May 2011 11:00:11 -0500 Subject: IEM Daily Bulletin Message-ID: <201105031600.p43G0B6Z032152@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 03 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-02 | Title : April started off warm | Date : 02 May 05:57 AM | Votes : Good: 10 Bad: 3 +---------------------------------------------- The featured chart displays the April temperature percentile from the first of the month to the given date. So on April 10, the average temperature was above the 80th percentile for the 1-10 April period. This value plunged for the rest of the month and finished cooler than average below the 40th percentile. May has not started much better with a cool northwest breeze and near freezing temperatures this morning. Really warm air is nowhere in the immediate forecast period! > NWS Watch/Warning Summary for 02 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 8 0 | 0 0 0 0 0 | 0 Svr Tstorm 28 0 | 0 0 0 0 0 | 0 Fl Flood 30 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: 29 Verified: 4 [13.8 %] Reduction of Size Versus County Based [57.0 %] Average Perimeter Ratio [20.4 %] Percentage of Warned Area Verified (15km) [5.8 %] Average Storm Based Warning Size [2086 sq km] Probability of Detection(higher is better)[0.60] False Alarm Ratio (lower is better) [0.86] Critical Success Index (higher is better) [0.13] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed May 4 11:00:19 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 4 May 2011 11:00:19 -0500 Subject: IEM Daily Bulletin Message-ID: <201105041600.p44G0JKV006240@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 04 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-03 | Title : Frosty May Morning | Date : 03 May 07:18 AM | Votes : Good: 18 Bad: 7 +---------------------------------------------- Clear skies and low dew points helped temperatures drop to well below freezing over a good portion of Iowa this morning. It is not that exceptional to have this cold of weather for the 3rd of May as we are just now getting out of the period where we would expect our last frost of the season. The good news is that our weather has been mostly dry recently allowing some field work to be done, but without warmer temperatures, the crops will not grow. > NWS Watch/Warning Summary for 03 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 26 0 | 0 0 0 0 0 | 1 Fl Flood 15 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: 26 Verified: 18 [69.2 %] Reduction of Size Versus County Based [54.6 %] Average Perimeter Ratio [23.4 %] Percentage of Warned Area Verified (15km) [22.4 %] Average Storm Based Warning Size [2326 sq km] Probability of Detection(higher is better)[0.86] False Alarm Ratio (lower is better) [0.31] Critical Success Index (higher is better) [0.62] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu May 5 11:00:07 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 5 May 2011 11:00:07 -0500 Subject: IEM Daily Bulletin Message-ID: <201105051600.p45G070W026546@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 05 May 2011 > News +---------------------------------------------- | Title : April ASOS Data Uploaded | Date : 04 May 11:27 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/request/asos/1min.phtml +----------------------------------------------

The one minute interval Iowa ASOS data for April has been uploaded to the IEM. Observations for Omaha, Sioux Falls, and Moline are available as well. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-04 | Title : Colder than April | Date : 04 May 07:17 AM | Votes : Good: 14 Bad: 6 +---------------------------------------------- Iowa is experiencing another chilly May morning with lows in the 20s and 30s. For some locations, the lows experienced over the past two days have been colder than the coldest daily low temperature in April. This situation is very rare and has only happened during a couple of years since 1893. The featured plot compares the coldest temperature in May against April. A negative value would mean the May lowest temperature was colder than April. Warmer weather is set to return today, but with it will come chances of rain! > NWS Watch/Warning Summary for 04 May 2011 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 Fri May 6 11:00:06 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 6 May 2011 11:00:06 -0500 Subject: IEM Daily Bulletin Message-ID: <201105061600.p46G06US031302@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 06 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-05 | Title : Not a struggle | Date : 05 May 10:06 PM | Votes : Good: 10 Bad: 2 +---------------------------------------------- Our recent stretch of weather from mid April has seen us struggle to reach 60 degrees. The last two days have seen much warmer temperatures and the forecast is calling for even warmer temperatures in the 70s and 80s next week. There are continued chances of showers, but nothing too heavy. This weather will help farmers catch up on planting! > NWS Watch/Warning Summary for 05 May 2011 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 May 7 11:00:04 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 7 May 2011 11:00:04 -0500 Subject: IEM Daily Bulletin Message-ID: <201105071600.p47G04G0028911@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 07 May 2011 > News +---------------------------------------------- | Title : August COOP Data Uploaded | Date : 06 May 04:35 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/climodat/ +----------------------------------------------

The quality controlled Iowa COOP data for August 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:

August temperatures averaged 74.7 degrees or 3.4 degrees above normal while precipitation totaled 4.80 inches or 0.61 inch above normal. This ranks as the 17th warmest and 31st wettest August among 138 years of records. The last warmer August came in 1995. The warmth came without extreme heat with 97 degrees being the statewide maximum temperature with a few northeast Iowa localities not reaching 90 degrees during the month. Rainfall was highly variable with only 1.03 inches at Guttenberg (6th driest August among 80 years of records) to 15.55 inches at the Ames Airport. Record maximum August rain totals were set at Ankeny and Ottumwa. The three summer months of 2010 averaged 73.5 degrees or 1.9 degrees above normal while precipitation totaled 23.30 inches or 10.22 inches above normal. This ranked as the 26th warmest and 2nd wettest summer among 138 years of records. The last warmer summer was in 2002 and only 1993 brought more rain (26.83 inches).

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

                 ________________2010 _________________2009_
                 AUG  JUL  JUN  MAY  APR  MAR  FEB  JAN  DEC
Maximum High:     10    0    0   61   69    3    0    0    0
Minimum High:      6    0    5   45    6    0    6   97   24
Maximum Low:      53   19    2  112   42    7    0   18    3
Minimum Low:       2    0    0   13    1    0   38  131   41
Maximum Precip:  103  160  126   52   38   30   25  151  193

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. I am not sure why the precipitation bias flipped signs so strongly, will have to dig some more into that. 

                 ________________2010_________________________
                 AUG   JUL   JUN   MAY   APR   MAR   FEB   JAN 
High Temp Bias   0.5   0.9   0.6   1.1   0.5   1.9   1.4   1.3 
High Temp RMSE   1.0   1.4   1.1   1.4   1.1   2.2   1.7   1.6 
Low  Temp Bias   1.0   1.2   0.8   1.2   1.6   2.5   2.0   1.9 
Low  Temp RMSE   1.4   1.5   1.3   1.6   2.0   2.7   2.4   2.1 
Precip    Bias   1.37 -1.28 -0.05 -0.64 -0.18 -0.37 -0.61 -0.47 
Precip    RMSE   0.60  1.60  1.63  0.81  0.56  0.44  0.61  0.50

The Climodat reports referenced from this news item are summaries of this daily data. > Daily Feature No feature posted > NWS Watch/Warning Summary for 06 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 3 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: 3 Verified: 1 [33.3 %] Reduction of Size Versus County Based [85.6 %] Average Perimeter Ratio [14.9 %] Percentage of Warned Area Verified (15km) [12.7 %] Average Storm Based Warning Size [839 sq km] Probability of Detection(higher is better)[0.50] False Alarm Ratio (lower is better) [0.67] Critical Success Index (higher is better) [0.25] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun May 8 11:00:13 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 8 May 2011 11:00:13 -0500 Subject: IEM Daily Bulletin Message-ID: <201105081600.p48G0Dqx022645@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 08 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 07 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 14 0 | 0 0 0 0 0 | 0 Svr Tstorm 33 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: 44 Verified: 11 [25.0 %] Reduction of Size Versus County Based [77.6 %] Average Perimeter Ratio [33.1 %] Percentage of Warned Area Verified (15km) [15.5 %] Average Storm Based Warning Size [979 sq km] Probability of Detection(higher is better)[0.92] False Alarm Ratio (lower is better) [0.75] Critical Success Index (higher is better) [0.24] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon May 9 11:00:09 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 9 May 2011 11:00:09 -0500 Subject: IEM Daily Bulletin Message-ID: <201105091600.p49G09gO019497@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 09 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 08 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 2 0 | 0 0 0 0 0 | 1 Svr Tstorm 18 0 | 0 0 0 0 4 | 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: 21 Verified: 8 [38.1 %] Reduction of Size Versus County Based [80.5 %] Average Perimeter Ratio [22.9 %] Percentage of Warned Area Verified (15km) [17.0 %] Average Storm Based Warning Size [1106 sq km] Probability of Detection(higher is better)[0.62] False Alarm Ratio (lower is better) [0.62] Critical Success Index (higher is better) [0.31] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue May 10 11:00:11 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 10 May 2011 11:00:11 -0500 Subject: IEM Daily Bulletin Message-ID: <201105101600.p4AG0BDZ029941@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 10 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-09 | Title : Drier than recent years | Date : 09 May 05:54 AM | Votes : Good: 12 Bad: 4 +---------------------------------------------- Dew points are on the rise this Monday morning with some of the highest values we have seen in the past three weeks reported. The featured graph presents the simple average dew point value since mid April for this year and previous ones. This year's value is the lowest since 1997. The return of moisture today looks to stick around for the week helping to keep chances of rain going just about each day. > NWS Watch/Warning Summary for 09 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 11 0 | 0 0 0 0 0 | 0 Svr Tstorm 43 0 | 0 0 0 0 1 | 2 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: 54 Verified: 21 [38.9 %] Reduction of Size Versus County Based [82.3 %] Average Perimeter Ratio [20.8 %] Percentage of Warned Area Verified (15km) [17.9 %] Average Storm Based Warning Size [1645 sq km] Probability of Detection(higher is better)[0.80] False Alarm Ratio (lower is better) [0.61] Critical Success Index (higher is better) [0.35] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed May 11 11:00:51 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 11 May 2011 11:00:51 -0500 Subject: IEM Daily Bulletin Message-ID: <201105111600.p4BG0p25027006@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 11 May 2011 > News +---------------------------------------------- | Title : 10 May Record Highs | Date : 11 May 07:55 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/archive/rer/ +----------------------------------------------

Here is a summary of record high temperatures for 10 May from official NWS reporting sites.

Location2011Old RecordYear
Burlington92881956
Des Moines95901911
Lamoni91861911
Mason City94891987
Moline, IL93891911
Omaha, NE97931962
Ottumwa92891934
Sioux City96901987
Sioux Center94921987
Spencer95931987
Storm Lake96871987, 1963, 1911
Waterloo93911987

So far this morning, the Jefferson NWS COOP site reported a high temperature of 100 degrees on 10 May. This would be the first 100 degree reading in May since 15 May 2001. The previous dates were 31 May 2000, 30 May 1989, and then 26 May 1967! > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-10 | Title : 90s for some | Date : 10 May 05:51 AM | Votes : Good: 17 Bad: 4 +---------------------------------------------- Very warm air finally returned to Iowa on Monday with highs in the 90s over the western portion of the state as shown by the featured map. The northeastern portion was not as lucky with highs only in the 60s thanks to morning rain showers. The warm air continues today with good chances of breaking record high temperatures. > NWS Watch/Warning Summary for 10 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 11 0 | 0 0 0 0 0 | 1 Svr Tstorm 219 0 | 0 0 0 0 0 | 6 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: 224 Verified: 134 [59.8 %] Reduction of Size Versus County Based [68.2 %] Average Perimeter Ratio [20.4 %] Percentage of Warned Area Verified (15km) [23.7 %] Average Storm Based Warning Size [1644 sq km] Probability of Detection(higher is better)[0.92] False Alarm Ratio (lower is better) [0.40] Critical Success Index (higher is better) [0.57] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu May 12 11:01:14 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 12 May 2011 11:01:14 -0500 Subject: IEM Daily Bulletin Message-ID: <201105121601.p4CG1Euv022317@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 12 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-11 | Title : 100 degrees in May | Date : 11 May 08:12 AM | Votes : Good: 13 Bad: 2 +---------------------------------------------- Tuesday brought an early taste of summer with high temperatures well into the 90s and dew points in the upper 60s! Record highs were set all over the state with the featured map showing reported highs from the NWS COOP network. One site in the network (Jefferson) reported 100 degrees, which is a very rare event for May. It has been 10 years since our last 100 degree temperature in May. More muggy weather is in store for the next few days before a cool down for this weekend. > NWS Watch/Warning Summary for 11 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 19 5 | 0 0 4 0 3 | 2 Svr Tstorm 337 14 | 3 2 15 17 11 | 10 Fl Flood 26 3 | 0 0 3 1 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report PHP Notice: Undefined index: TSA-2011-05-11 23:50:00+00-D-0-Natural Dam in /mesonet/www/apps/iemwebsite/include/cow.php on line 464 PHP Notice: Undefined index: ts in /mesonet/www/apps/iemwebsite/include/cow.php on line 467 PHP Notice: Undefined index: buffered in /mesonet/www/apps/iemwebsite/include/cow.php on line 401 SVR+TOR Warnings Issued: 345 Verified: 163 [47.2 %] Reduction of Size Versus County Based [60.4 %] Average Perimeter Ratio [22.2 %] Percentage of Warned Area Verified (15km) [15.0 %] Average Storm Based Warning Size [2046 sq km] Probability of Detection(higher is better)[0.80] False Alarm Ratio (lower is better) [0.53] Critical Success Index (higher is better) [0.42] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri May 13 11:01:05 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 13 May 2011 11:01:05 -0500 Subject: IEM Daily Bulletin Message-ID: <201105131601.p4DG15nt002179@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 13 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-12 | Title : Some needed rain for Ames | Date : 12 May 05:43 AM | Votes : Good: 12 Bad: 7 +---------------------------------------------- Strong thunderstorms brought large hail and a few tornadoes to the state yesterday. They also brought much needed rainfall to locations like Ames, which had been dry since the later part of April. The featured chart shows the daily rainfall reports by the Ames Airport along with the departures from climatology. Yesterday's rainfall got Ames back to even for the period starting on 1 April. More rain is in the forecast with much cooler weather expected this weekend. > NWS Watch/Warning Summary for 12 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 24 0 | 0 0 0 4 0 | 1 Svr Tstorm 286 13 | 0 0 6 20 6 | 9 Fl Flood 22 0 | 0 0 0 5 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: 311 Verified: 144 [46.3 %] Reduction of Size Versus County Based [66.5 %] Average Perimeter Ratio [21.1 %] Percentage of Warned Area Verified (15km) [15.9 %] Average Storm Based Warning Size [1653 sq km] Probability of Detection(higher is better)[0.89] False Alarm Ratio (lower is better) [0.54] Critical Success Index (higher is better) [0.44] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat May 14 11:01:22 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 14 May 2011 11:01:22 -0500 Subject: IEM Daily Bulletin Message-ID: <201105141601.p4EG1M6Y015139@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 14 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-13 | Title : Much cooler weekend | Date : 13 May 06:01 AM | Votes : Good: 13 Bad: 10 +---------------------------------------------- This week has seen very warm weather for early march with highs topping out on Tuesday in the lower 90s for Ames. Much cooler air has arrived just in time for the weekend thanks to a passing storm system. The featured chart shows our hourly temperatures for this week and a forecast from one of the government models called GFS. It looks like we are back in the regime of struggling to reach 60, but warmer weather is set to return next week along with some sunshine. > NWS Watch/Warning Summary for 13 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 18 0 | 0 0 0 0 0 | 0 Svr Tstorm 214 0 | 0 0 0 0 0 | 5 Fl Flood 34 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: 229 Verified: 87 [38.0 %] Reduction of Size Versus County Based [67.6 %] Average Perimeter Ratio [22.6 %] Percentage of Warned Area Verified (15km) [15.1 %] Average Storm Based Warning Size [1339 sq km] Probability of Detection(higher is better)[0.82] False Alarm Ratio (lower is better) [0.62] Critical Success Index (higher is better) [0.35] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun May 15 11:00:28 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 15 May 2011 11:00:28 -0500 Subject: IEM Daily Bulletin Message-ID: <201105151600.p4FG0SYp016945@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 15 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 14 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 4 0 | 0 0 0 0 0 | 0 Svr Tstorm 83 0 | 0 0 0 0 0 | 3 Fl Flood 24 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: 86 Verified: 35 [40.7 %] Reduction of Size Versus County Based [72.1 %] Average Perimeter Ratio [9.2 %] Percentage of Warned Area Verified (15km) [14.2 %] Average Storm Based Warning Size [1742 sq km] Probability of Detection(higher is better)[0.64] False Alarm Ratio (lower is better) [0.59] Critical Success Index (higher is better) [0.33] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon May 16 11:00:07 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 16 May 2011 11:00:07 -0500 Subject: IEM Daily Bulletin Message-ID: <201105161600.p4GG07e6021524@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 16 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 15 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 0 0 | 0 0 0 0 0 | 0 Svr Tstorm 13 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: 13 Verified: 1 [7.7 %] Reduction of Size Versus County Based [75.6 %] Average Perimeter Ratio [2.8 %] Percentage of Warned Area Verified (15km) [4.5 %] Average Storm Based Warning Size [1100 sq km] Probability of Detection(higher is better)[0.50] False Alarm Ratio (lower is better) [0.92] Critical Success Index (higher is better) [0.07] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue May 17 11:00:05 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 17 May 2011 11:00:05 -0500 Subject: IEM Daily Bulletin Message-ID: <201105171600.p4HG05pp010996@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 17 May 2011 > News +---------------------------------------------- | Title : New Webcam: Coralville | Date : 17 May 08:03 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/current/webcam.php#KCRG-0 +----------------------------------------------

A new webcam has been added to the KCRG-TV CityCam network. This webcam is located in Coralville and has a great view of the area there! Coralville is just north of Iowa City. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-16 | Title : Southwesterly winds continue to be rare | Date : 16 May 05:53 AM | Votes : Good: 9 Bad: 4 +---------------------------------------------- This weekend saw temperatures struggle to reach 50 on Saturday and 60 on Sunday thanks to cloud cover and northerly winds. The featured chart presents the wind direction and air temperature since 15 April for Ames. The observations where the winds were from a direction between south and west are highlighted in red. These winds typically bring us warm air this time of year. This week will start off with plenty of sunshine and slowly warming temperatures. > NWS Watch/Warning Summary for 16 May 2011 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: 2 [50.0 %] Reduction of Size Versus County Based [85.0 %] Average Perimeter Ratio [36.8 %] Percentage of Warned Area Verified (15km) [40.7 %] Average Storm Based Warning Size [690 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 Wed May 18 11:00:11 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 18 May 2011 11:00:11 -0500 Subject: IEM Daily Bulletin Message-ID: <201105181600.p4IG0Bcr029351@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 18 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-17 | Title : Nary a cloud in the sky | Date : 17 May 05:53 AM | Votes : Good: 14 Bad: 4 +---------------------------------------------- After a miserable weekend, Monday was very nice with clear skies and warmer temperatures. There was also abundant dry air which makes for good conditions for satellites to peer down at us and capture beautiful shots such as the featured image from MODIS. Another clear day is expected today! > NWS Watch/Warning Summary for 17 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 12 0 | 0 0 0 0 0 | 0 Svr Tstorm 17 0 | 0 0 0 0 0 | 0 Fl Flood 20 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: 29 Verified: 8 [27.6 %] Reduction of Size Versus County Based [83.9 %] Average Perimeter Ratio [17.1 %] Percentage of Warned Area Verified (15km) [19.0 %] Average Storm Based Warning Size [974 sq km] Probability of Detection(higher is better)[0.81] False Alarm Ratio (lower is better) [0.72] Critical Success Index (higher is better) [0.26] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu May 19 11:00:29 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 19 May 2011 11:00:29 -0500 Subject: IEM Daily Bulletin Message-ID: <201105191600.p4JG0Tir002078@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 19 May 2011 > News +---------------------------------------------- | Title : NWS Warning Search | Date : 19 May 09:21 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/vtec/search.php +----------------------------------------------

I have created a page that allows you to search the IEM's archive of NWS watch, warning, and advisories by county or zone. I routinely get questions like:

  • How many tornado warnings does Polk County get per year?
  • How often do high wind warnings get issued for such-and-such Zone?

This application should answer those questions. You can export the presented table to excel for further analysis if you wish. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-18 | Title : Better curves on sunny days | Date : 18 May 05:57 AM | Votes : Good: 17 Bad: 9 +---------------------------------------------- The featured chart is a timeseries from the Cantril RWIS site showing air, pavement, and sub surface temperatures since last Thursday. The impact of having sunny days on temperatures can clearly be seen with the textbook delayed response as you go deeper into the ground. The black dashed line is the temperature at 60 inches which was warming this past weekend while everything else was cooling off. While the impacts of sunshine near the surface have a daily signal, the deeper you go the slower things vary. You can even notice the difference between 8 and 16 inches. > NWS Watch/Warning Summary for 18 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 12 0 | 0 0 0 0 0 | 1 Svr Tstorm 42 0 | 0 0 0 0 0 | 1 Fl Flood 15 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: 55 Verified: 10 [18.2 %] Reduction of Size Versus County Based [78.6 %] Average Perimeter Ratio [16.9 %] Percentage of Warned Area Verified (15km) [15.8 %] Average Storm Based Warning Size [1055 sq km] Probability of Detection(higher is better)[0.68] False Alarm Ratio (lower is better) [0.82] Critical Success Index (higher is better) [0.17] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri May 20 11:00:33 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 20 May 2011 11:00:33 -0500 Subject: IEM Daily Bulletin Message-ID: <201105201600.p4KG0XT8005410@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 20 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-19 | Title : Lack of SW winds continues | Date : 19 May 07:35 AM | Votes : Good: 15 Bad: 3 +---------------------------------------------- Our winds are again out of the east this morning with an approaching storm system to our west. These winds are not as warm as those from our southwest. The featured chart presents the number of unique hours during which a wind observation of at least 5 knots was reported by the Des Moines ASOS since the first of April. Since 1973, this calculation would indicate that this year has seen the fewest number of hours. > NWS Watch/Warning Summary for 19 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 18 0 | 0 0 0 0 0 | 3 Svr Tstorm 96 0 | 0 0 0 3 0 | 2 Fl Flood 20 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: 114 Verified: 36 [31.6 %] Reduction of Size Versus County Based [71.0 %] Average Perimeter Ratio [17.0 %] Percentage of Warned Area Verified (15km) [13.2 %] Average Storm Based Warning Size [1519 sq km] Probability of Detection(higher is better)[0.74] False Alarm Ratio (lower is better) [0.68] Critical Success Index (higher is better) [0.28] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat May 21 11:00:51 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 21 May 2011 11:00:51 -0500 Subject: IEM Daily Bulletin Message-ID: <201105211600.p4LG0pOi032747@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 21 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-20 | Title : Dry Thursday, Wet Friday | Date : 20 May 05:51 AM | Votes : Good: 15 Bad: 8 +---------------------------------------------- Showers and thunderstorms are visiting the state this Friday morning and are expected to stick around for most of the day. This comes after a dry Thursday for Ames. The featured chart displays the average weather for Ames by day of the week for the past year. Thursday has been remarkably dry compared to the other days, including Friday. The upper chart displays the frequency of having a high temperature above climatology for the day. So while Thursday's have been drier, they are also cooler! > NWS Watch/Warning Summary for 20 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 8 0 | 0 0 0 0 0 | 2 Svr Tstorm 109 0 | 0 0 0 0 0 | 2 Fl Flood 55 0 | 0 0 0 1 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: 111 Verified: 24 [21.6 %] Reduction of Size Versus County Based [63.8 %] Average Perimeter Ratio [20.5 %] Percentage of Warned Area Verified (15km) [6.1 %] Average Storm Based Warning Size [2062 sq km] Probability of Detection(higher is better)[0.66] False Alarm Ratio (lower is better) [0.78] Critical Success Index (higher is better) [0.19] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun May 22 11:00:54 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 22 May 2011 11:00:54 -0500 Subject: IEM Daily Bulletin Message-ID: <201105221600.p4MG0s0h027396@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 22 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 21 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 37 0 | 0 0 0 3 0 | 1 Svr Tstorm 212 12 | 0 0 11 32 16 | 4 Fl Flood 2 0 | 0 0 0 1 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: 242 Verified: 127 [52.5 %] Reduction of Size Versus County Based [71.3 %] Average Perimeter Ratio [26.5 %] Percentage of Warned Area Verified (15km) [24.4 %] Average Storm Based Warning Size [1134 sq km] Probability of Detection(higher is better)[0.90] False Alarm Ratio (lower is better) [0.48] Critical Success Index (higher is better) [0.50] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon May 23 11:01:40 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 23 May 2011 11:01:40 -0500 Subject: IEM Daily Bulletin Message-ID: <201105231601.p4NG1euf000652@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 23 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 22 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 99 7 | 11 4 3 0 0 | 9 Svr Tstorm 488 14 | 12 20 4 0 0 | 7 Fl Flood 31 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: 570 Verified: 270 [47.4 %] Reduction of Size Versus County Based [67.5 %] Average Perimeter Ratio [22.6 %] Percentage of Warned Area Verified (15km) [21.2 %] Average Storm Based Warning Size [1544 sq km] Probability of Detection(higher is better)[0.87] False Alarm Ratio (lower is better) [0.53] Critical Success Index (higher is better) [0.44] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue May 24 11:01:26 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 24 May 2011 11:01:26 -0500 Subject: IEM Daily Bulletin Message-ID: <201105241601.p4OG1QFP027028@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 24 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-23 | Title : Widespread severe event | Date : 23 May 06:04 AM | Votes : Good: 22 Bad: 9 +---------------------------------------------- The weather was severe on Sunday over a large portion of the country. The featured chart presents the combined number of counties under either a tornado or severe thunderstorm watch at a given time. The total combined area of those counties is presented as well. At 3:45 PM yesterday, 445 counties were in watches covering an area larger than Texas! According the IEM data, the largest number of counties under watch in the past 6 years was 785 during the recent outbreak over the south on 27 April. > NWS Watch/Warning Summary for 23 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 48 0 | 0 0 0 0 0 | 2 Svr Tstorm 340 0 | 0 0 0 0 0 | 12 Fl Flood 40 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 PHP Notice: Undefined index: JKL-2011-05-24 01:22:00+00-D-0-4 N Salyersville in /mesonet/www/apps/iemwebsite/include/cow.php on line 464 PHP Notice: Undefined index: ts in /mesonet/www/apps/iemwebsite/include/cow.php on line 467 PHP Notice: Undefined index: buffered in /mesonet/www/apps/iemwebsite/include/cow.php on line 401 SVR+TOR Warnings Issued: 386 Verified: 174 [45.1 %] Reduction of Size Versus County Based [58.1 %] Average Perimeter Ratio [19.5 %] Percentage of Warned Area Verified (15km) [20.7 %] Average Storm Based Warning Size [1943 sq km] Probability of Detection(higher is better)[0.85] False Alarm Ratio (lower is better) [0.55] Critical Success Index (higher is better) [0.42] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Wed May 25 11:01:20 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 25 May 2011 11:01:20 -0500 Subject: IEM Daily Bulletin Message-ID: <201105251601.p4PG1Kaq019500@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 25 May 2011 > News +---------------------------------------------- | Title : May 26 - Network Outage | Date : 25 May 08:23 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/ +----------------------------------------------

Between 5:30 and 7:30 AM CDT on Thursday, 26 May, ISU Telecommunications staff will be doing in-building network equipment upgrades that will take the IEM offline for hopefully brief periods of time. The switch the IEM is connected to will be replaced first and I'll be carefully watching for any issues that arise. :)

The upgraded equipment will support an upcoming roll out of 10 gigabit network. Currently, the IEM is on a gigabit connection, but shares it with other piggy research data servers I maintain. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-24 | Title : 70s and 90s | Date : 24 May 05:12 AM | Votes : Good: 11 Bad: 10 +---------------------------------------------- Prior to yesterday, the high temperature for Ames had only warmed to 70 degrees or greater 15 times this year. This is a relatively low number compared with other years with only 1993 having fewer days since 1990. The featured chart compares the number of days above 70 prior to yesterday to the number of days above 90 for the rest of the year. Since 1990, the largest number of days over 90 was 22 days in 2005. Highs are expected to approach 80 today with cooler weather arriving for the rest of the week. > NWS Watch/Warning Summary for 24 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 126 1 | 0 1 0 0 0 | 7 Svr Tstorm 309 6 | 0 7 1 0 0 | 8 Fl Flood 33 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: 441 Verified: 203 [46.0 %] Reduction of Size Versus County Based [62.1 %] Average Perimeter Ratio [24.8 %] Percentage of Warned Area Verified (15km) [18.7 %] Average Storm Based Warning Size [1999 sq km] Probability of Detection(higher is better)[0.89] False Alarm Ratio (lower is better) [0.54] Critical Success Index (higher is better) [0.44] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu May 26 11:02:06 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 26 May 2011 11:02:06 -0500 Subject: IEM Daily Bulletin Message-ID: <201105261602.p4QG26P0007274@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 26 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-25 | Title : Our current trouble maker | Date : 25 May 08:34 AM | Votes : Good: 14 Bad: 11 +---------------------------------------------- The parade of severe weather outbreaks continued yesterday with numerous tornadoes reported in Oklahoma and Kansas. This was thanks to a very large storm system that shows up on visible satellite this morning centered over Kansas. More severe weather is expected today, but Iowa will miss out on most of it with the primary impact being continued heavy rains. > NWS Watch/Warning Summary for 25 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 289 0 | 0 2 0 0 0 | 12 Svr Tstorm 409 0 | 0 5 0 0 0 | 0 Fl Flood 45 2 | 0 5 3 1 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: 704 Verified: 253 [35.9 %] Reduction of Size Versus County Based [60.8 %] Average Perimeter Ratio [25.9 %] Percentage of Warned Area Verified (15km) [18.6 %] Average Storm Based Warning Size [1925 sq km] Probability of Detection(higher is better)[0.85] False Alarm Ratio (lower is better) [0.64] Critical Success Index (higher is better) [0.34] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri May 27 11:03:53 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 27 May 2011 11:03:53 -0500 Subject: IEM Daily Bulletin Message-ID: <201105271603.p4RG3r9T005916@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 27 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-26 | Title : Concerns of flooding again | Date : 26 May 06:15 AM | Votes : Good: 15 Bad: 7 +---------------------------------------------- Our recent stretch of showers and thunderstorms have dumped some heavy rainfall totals over portions of southeastern Iowa, while extreme northwestern Iowa has missed out. The featured map is of estimated precipitation for the past 72 hours from a NOAA project abbreviated NMQ. Totals over 6 inches are depicted. More rain is in the forecast for today. > NWS Watch/Warning Summary for 26 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 44 0 | 0 0 0 0 0 | 3 Svr Tstorm 399 0 | 0 0 0 0 0 | 6 Fl Flood 25 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 PHP Notice: Undefined index: RNK-2011-05-27 03:07:00+00-D-0-5 Se Yadkinville in /mesonet/www/apps/iemwebsite/include/cow.php on line 464 PHP Notice: Undefined index: ts in /mesonet/www/apps/iemwebsite/include/cow.php on line 467 PHP Notice: Undefined index: buffered in /mesonet/www/apps/iemwebsite/include/cow.php on line 401 SVR+TOR Warnings Issued: 417 Verified: 237 [56.8 %] Reduction of Size Versus County Based [62.7 %] Average Perimeter Ratio [16.3 %] Percentage of Warned Area Verified (15km) [21.7 %] Average Storm Based Warning Size [2107 sq km] Probability of Detection(higher is better)[0.82] False Alarm Ratio (lower is better) [0.43] Critical Success Index (higher is better) [0.51] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat May 28 11:00:39 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 28 May 2011 11:00:39 -0500 Subject: IEM Daily Bulletin Message-ID: <201105281600.p4SG0dF2032412@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 28 May 2011 > News +---------------------------------------------- | Title : Sept COOP Data Uploaded | Date : 27 May 12:53 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/climodat/ +----------------------------------------------

The quality controlled Iowa COOP data for September 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:

September 2010 temperatures averaged 63.1 degrees or 0.2 degrees above normal while precipitation totaled 5.56 inches or 2.15 inches above normal.???? This ranks as the 60th coolest and 19th wettest September among 138 years of records.???? This was also the coolest September since 2006 and wettest since 1986.

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

                 _____________________2010 _________________
                 SEP  AUG  JUL  JUN  MAY  APR  MAR  FEB  JAN
Maximum High:     11   10    0    0   61   69    3    0    0
Minimum High:     43    6    0    5   45    6    0    6   97
Maximum Low:      20   53   19    2  112   42    7    0   18
Minimum Low:       1    2    0    0   13    1    0   38  131
Maximum Precip:  106  103  160  126   52   38   30   25  151

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_________________________
                 SEP   AUG   JUL   JUN   MAY   APR   MAR   FEB 
High Temp Bias   0.5   0.5   0.9   0.6   1.1   0.5   1.9   1.4 
High Temp RMSE   1.2   1.0   1.4   1.1   1.4   1.1   2.2   1.7
Low  Temp Bias   0.7   1.0   1.2   0.8   1.2   1.6   2.5   2.0
Low  Temp RMSE   1.5   1.4   1.5   1.3   1.6   2.0   2.7   2.4
Precip    Bias  -1.22  1.37 -1.28 -0.05 -0.64 -0.18 -0.37 -0.61
Precip    RMSE   1.34  0.60  1.60  1.63  0.81  0.56  0.44  0.61

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=2011-05-27 | Title : 9 days over 100 warnings | Date : 27 May 05:54 AM | Votes : Good: 17 Bad: 9 +---------------------------------------------- The featured chart displays the number of tornado warnings issued by the NWS for each day this year. There have been 9 days with over 100 warnings issued per day. In total, there have been 3,147 tornado warnings issued so far this year. This total is only about 300 warnings shy of the entire year's total for 2010. > NWS Watch/Warning Summary for 27 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 9 0 | 0 0 0 0 0 | 0 Svr Tstorm 148 0 | 0 0 0 0 0 | 3 Fl Flood 20 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: 155 Verified: 77 [49.7 %] Reduction of Size Versus County Based [74.1 %] Average Perimeter Ratio [15.9 %] Percentage of Warned Area Verified (15km) [18.9 %] Average Storm Based Warning Size [1560 sq km] Probability of Detection(higher is better)[0.86] False Alarm Ratio (lower is better) [0.50] Critical Success Index (higher is better) [0.46] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun May 29 11:00:27 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 29 May 2011 11:00:27 -0500 Subject: IEM Daily Bulletin Message-ID: <201105291600.p4TG0RJE029551@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 29 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 28 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 5 0 | 0 0 0 0 0 | 0 Svr Tstorm 87 0 | 0 1 0 0 0 | 4 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: 91 Verified: 37 [40.7 %] Reduction of Size Versus County Based [74.0 %] Average Perimeter Ratio [20.0 %] Percentage of Warned Area Verified (15km) [19.0 %] Average Storm Based Warning Size [1546 sq km] Probability of Detection(higher is better)[0.85] False Alarm Ratio (lower is better) [0.59] Critical Success Index (higher is better) [0.38] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon May 30 11:00:35 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 30 May 2011 11:00:35 -0500 Subject: IEM Daily Bulletin Message-ID: <201105301600.p4UG0ZsR032184@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 30 May 2011 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 29 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 16 0 | 0 0 0 0 0 | 2 Svr Tstorm 89 7 | 0 11 6 8 3 | 5 Fl Flood 8 0 | 0 1 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: 106 Verified: 66 [62.3 %] Reduction of Size Versus County Based [45.2 %] Average Perimeter Ratio [15.4 %] Percentage of Warned Area Verified (15km) [21.1 %] Average Storm Based Warning Size [2976 sq km] Probability of Detection(higher is better)[0.88] False Alarm Ratio (lower is better) [0.38] Critical Success Index (higher is better) [0.58] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue May 31 11:00:43 2011 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 31 May 2011 11:00:43 -0500 Subject: IEM Daily Bulletin Message-ID: <201105311600.p4VG0ho9014112@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 31 May 2011 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2011-05-30 | Title : Summer starts muggy | Date : 30 May 05:56 AM | Votes : Good: 9 Bad: 9 +---------------------------------------------- The unofficial start to summer is today and the summer-like muggy air has returned just in time. The featured chart presents dew point observations so far this month and the spike upwards yesterday was thanks to a warm front that made it into Iowa late Sunday afternoon. Dew point readings were the warmest since the second week of May. > NWS Watch/Warning Summary for 30 May 2011 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 38 0 | 0 0 0 1 7 | 3 Svr Tstorm 131 0 | 0 0 0 4 15 | 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 PHP Notice: Undefined index: ICT-2011-05-31 04:22:00+00-G-65-Sylvan Grove in /mesonet/www/apps/iemwebsite/include/cow.php on line 464 PHP Notice: Undefined index: ts in /mesonet/www/apps/iemwebsite/include/cow.php on line 467 PHP Notice: Undefined index: ICT-2011-05-31 04:22:00+00-H-1-Sylvan Grove in /mesonet/www/apps/iemwebsite/include/cow.php on line 464 PHP Notice: Undefined index: ts in /mesonet/www/apps/iemwebsite/include/cow.php on line 467 PHP Notice: Undefined index: buffered in /mesonet/www/apps/iemwebsite/include/cow.php on line 401 PHP Notice: Undefined index: buffered in /mesonet/www/apps/iemwebsite/include/cow.php on line 401 SVR+TOR Warnings Issued: 166 Verified: 76 [45.8 %] Reduction of Size Versus County Based [64.7 %] Average Perimeter Ratio [19.0 %] Percentage of Warned Area Verified (15km) [13.8 %] Average Storm Based Warning Size [2432 sq km] Probability of Detection(higher is better)[0.78] False Alarm Ratio (lower is better) [0.54] Critical Success Index (higher is better) [0.41] -------------- next part -------------- An HTML attachment was scrubbed... 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