From akrherz at iastate.edu Wed Dec 1 11:00:10 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 1 Dec 2010 11:00:10 -0600 Subject: IEM Daily Bulletin Message-ID: <201012011700.oB1H0Av7030714@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 01 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-11-30 | Title : Cold November Rains | Date : 30 Nov 05:47 AM | Votes : Good: 31 Bad: 5 +---------------------------------------------- A passing storm system brought rains to primarily eastern Iowa on Monday and with temperatures only in the 40s, it was certainly a cold rain. The featured chart presents the temperature at which the Des Moines ASOS sensor reported an hourly precipitation greater than 5 hundredths of an inch (think of it as the temperature during which the precip fell). The top plot shows that during the summer time, these rain events rarely occur below 60 degrees whereas in late November they occur at 55 degrees and less. Getting stuck outside during a rain is certainly more pleasant in July! The bottom plot shows a comparison between the temperature and reported one hour precipitation total. The bottom plot shows an interesting feature whereby nearly all the heavy one hour events occur at temperatures above 60 degrees. Surface temperatures can be thought of as a proxy to the amount of water capable of being held in a column of atmosphere. To get heavy precipitation rates, one needs a warm column capable of holding more water vapour to yield precipitation. > NWS Watch/Warning Summary for 30 Nov 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 75 0 | 0 0 0 0 0 | 4 Svr Tstorm 93 0 | 0 0 0 0 0 | 0 Fl Flood 19 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: 165 Verified: 37 [22.4 %] Reduction of Size Versus County Based [62.1 %] Average Perimeter Ratio [34.9 %] Percentage of Warned Area Verified (15km) [10.2 %] Average Storm Based Warning Size [1829 sq km] Probability of Detection(higher is better)[0.73] False Alarm Ratio (lower is better) [0.78] Critical Success Index (higher is better) [0.21] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Dec 2 11:00:07 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 2 Dec 2010 11:00:07 -0600 Subject: IEM Daily Bulletin Message-ID: <201012021700.oB2H07Ed028261@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 02 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-01 | Title : Another wet winter in store? | Date : 01 Dec 05:47 AM | Votes : Good: 31 Bad: 5 +---------------------------------------------- Today starts the meteorological winter season and one wonders if it will be as wet as recent winters. The featured chart presents the range of reported winter season precipitation for Iowa (bars) along with the totals for Ames and the mean state wide value. Of course, when these precipitation amounts fall in the form of snow or ice, it makes for a much more difficult winter. The chart interestingly shows that most of the time (~ 70%), the precipitation total in Ames is lower than the state wide average. This is probably due to having more rainfall events clip southeast Iowa. > NWS Watch/Warning Summary for 01 Dec 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 4 0 | 0 0 0 0 0 | 3 Svr Tstorm 42 0 | 0 0 0 0 0 | 0 Fl Flood 16 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: 46 Verified: 31 [67.4 %] Reduction of Size Versus County Based [49.2 %] Average Perimeter Ratio [28.8 %] Percentage of Warned Area Verified (15km) [18.0 %] Average Storm Based Warning Size [3207 sq km] Probability of Detection(higher is better)[0.69] False Alarm Ratio (lower is better) [0.33] Critical Success Index (higher is better) [0.52] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Dec 3 11:00:02 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 3 Dec 2010 11:00:02 -0600 Subject: IEM Daily Bulletin Message-ID: <201012031700.oB3H021u005422@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 03 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-02 | Title : When does winter start? | Date : 02 Dec 05:48 AM | Votes : Good: 31 Bad: 4 +---------------------------------------------- While yesterday was the start of meteorological winter, the 21st is the start of the commonly defined winter season. If one considers winter a 91 day period with the coldest climatological temperatures, the actual start of winter is slightly before 1 December in Iowa. The feature map presents an IEM produced analysis of the start date of the coldest 91 consecutive day period based on climatology data. The map nicely shows the start of this period comes first for those in the western US and marches east with a ~4 week difference between the two. The coastal regions of California enjoy the moderating effects of the Pacific Ocean and appear to be the last to join the winter period. > NWS Watch/Warning Summary for 02 Dec 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 Dec 4 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 4 Dec 2010 11:00:03 -0600 Subject: IEM Daily Bulletin Message-ID: <201012041700.oB4H03p0023686@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 04 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-03 | Title : Fall Duration | Date : 03 Dec 05:46 AM | Votes : Good: 44 Bad: 12 +---------------------------------------------- Following up on the previous day's feature, today's featured plot presents an IEM computed metric of the climatological duration of the fall season. The number of days presented represent the time between the warmest 91 day period and coolest 91 day period based on daily climatological high and low temperatures. Think of it as the number of days it takes to get from the warmest quarter of the year to coolest. Iowa is shown right around 90 days, which is about what one would expect for having evenly distributed seasons. The plot would suggest that if you like the fall, don't live on the west coast! > NWS Watch/Warning Summary for 03 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Dec 5 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 5 Dec 2010 11:00:03 -0600 Subject: IEM Daily Bulletin Message-ID: <201012051700.oB5H03c1025359@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 05 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-04 | Title : Snow Storm #2 | Date : 04 Dec 02:00 PM | Votes : Good: 19 Bad: 6 +---------------------------------------------- Our second major winter storm of the season is now in the books. The heaviest totals fell from Minneapolis down through Dubuque making the northeast corner of the state the lucky ones this time. With the system departing to our east today, very cold air is on the way with highs on Monday only expected in the teens! > NWS Watch/Warning Summary for 04 Dec 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 Dec 6 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 6 Dec 2010 11:00:03 -0600 Subject: IEM Daily Bulletin Message-ID: <201012061700.oB6H038w014914@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 06 December 2010 > News +---------------------------------------------- | Title : NWS Data Outage | Date : 05 Dec 01:16 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu +----------------------------------------------

The primary data dissemination system for the NWS is currently down (since noon Sunday). This causes a number of problems for various IEM apps. Not much can be done.

Update 4 PM: The outage continues. It is being caused by a rogue satellite blocking the transmission of data. No ETA at this time.

Update 7 AM, 6 Dec: The data feed stabilized last night, here is an interesting read on what may have happened. > Daily Feature No feature posted > NWS Watch/Warning Summary for 05 Dec 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 Tue Dec 7 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 7 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012071700.oB7H045E009340@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 07 December 2010 > News +---------------------------------------------- | Title : Nov AWOS Data Uploaded | Date : 06 Dec 01:06 PM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/request/awos/1min.php +----------------------------------------------

The one minute interval Iowa AWOS data for November has been uploaded to the IEM data coffers. This data is kindly provided to the IEM each month by the Iowa Department of Transportation. This dataset provides one minute interval weather observations dating back to 1995. Here is a listing of the number of observations collected per year. 

 Year |      Count
 1994 |    292,619
 1995 | 15,669,147
 1996 | 13,961,700
 1997 | 14,469,995
 1998 | 15,135,295
 1999 | 15,300,620
 2000 | 15,708,744
 2001 | 14,897,825
 2002 | 16,986,092
 2003 | 17,658,661
 2004 | 17,892,222
 2005 | 18,675,031
 2006 | 19,341,431
 2007 | 20,112,357
 2008 | 20,600,402
 2009 | 21,878,207
 2010 | 18,788,898

This totals over 277 million observations. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-06 | Title : Cold even without snow | Date : 06 Dec 01:17 AM | Votes : Good: 24 Bad: 4 +---------------------------------------------- For those of us in central Iowa still without snow, these very cold December days are typically what you would expect with snow on the ground. The featured chart presents the difference in daily high and low temperature when there was and was not snow on the ground. The cold weather will continue this week with a warm up to just above freezing not expected until the end of the week along with a chance of snow. > NWS Watch/Warning Summary for 06 Dec 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 Wed Dec 8 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 8 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012081700.oB8H04ca010378@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 08 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-07 | Title : A repeat of last winter? | Date : 07 Dec 05:47 AM | Votes : Good: 22 Bad: 5 +---------------------------------------------- The forecast for the coming weekend looks to bring accumulating snow to central Iowa for the first time this season. The featured chart presents the daily snow depth reported near Ames for the previous winter seasons since Nov 1964. Last year certainly sticks out on this chart with deep snow throughout much of February. One also notes that once the snow arrived during the second week of December, it stuck around until mid March! Are we set to repeat this pattern? > NWS Watch/Warning Summary for 07 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Dec 9 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 9 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012091700.oB9H047U031332@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 09 December 2010 > News +---------------------------------------------- | Title : Nov ASOS Data Uploaded | Date : 08 Dec 11:40 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/request/asos/1min.phtml +----------------------------------------------

The one minute interval Iowa ASOS data for November has been uploaded to the IEM. Data for Omaha, Sioux Falls, and Moline are included as well. This archive of minute interval data dates back to 2000 and includes this many observations per year. 

 Year   Count
 2000 | 2,939,929
 2001 | 2,647,615
 2002 | 2,979,673
 2003 | 3,201,995
 2004 | 3,247,379
 2005 | 7,293,840
 2006 | 8,200,198
 2007 | 8,741,794
 2008 | 8,912,597
 2009 | 9,034,388
 2010 | 8,117,076

That totals over 65 million observations. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-08 | Title : Does the first snow stick around? | Date : 08 Dec 05:47 AM | Votes : Good: 16 Bad: 2 +---------------------------------------------- With folks in Ames and Des Moines anxiously waiting for our first snowfall of the season, one may wonder how long our new snowfall will stick around? The featured chart presents the date and amount of the first snowfall for Ames of the winter season. The dot's color represent how long measurable snow depth was observed after the initial snow fall. Last year, our first snow fall (around this date) stuck around until mid March! Most of the dots are in the 1-7 day range, so perhaps our first taste of snow will be brief like most years! > NWS Watch/Warning Summary for 08 Dec 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 [67.0 %] Average Perimeter Ratio [0.0 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [1780 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 Fri Dec 10 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 10 Dec 2010 11:00:03 -0600 Subject: IEM Daily Bulletin Message-ID: <201012101700.oBAH03kV025318@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 10 December 2010 > News +---------------------------------------------- | Title : All COOP / DCP Added | Date : 10 Dec 07:41 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/DCP/ +----------------------------------------------

The IEM processes and archives data from a wild variety of sources. Two of these sources are collected under network names called "COOP" and "DCP". The COOP network are typically once daily observations of climate made by human observers volunteering with the National Weather Service. The DCP network are automated sensors typically along rivers operated by the USGS, NWS, and many others.

Prior to a few days ago, the IEM only processed COOP data for states in the upper midwest US and DCP data from Iowa. I have now expanded the processing to include all states for both networks. Unfortunately, this is a non trivial act. Due to many strange and complex issues relating to the processing of this dataset, it is difficult to create a definitive station table to process data against. I have to do a bunch of manual checking of various site identifiers to locate accurate metadata for them. Both the DCP and COOP data arrives to the IEM intermingled in SHEF products, so separating them out is difficult. To make matters worse, some site identifiers are shared between the COOP and DCP networks, sigh. And to pile on the complaining, there are over a hundred site IDs that are unknown even to the internal NWS metadata system.

Having said all that, I enjoy challenges and we'll eventually get a clean processing set of COOP and DCP data for the entire country! > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-09 | Title : Hope after a cold start | Date : 09 Dec 05:50 AM | Votes : Good: 17 Bad: 6 +---------------------------------------------- The start of December has been on the cold side with an average of just 20 degrees for Ames so far. The featured chart presents some hope for warmer weather comparing the first 8 days of December versus the remaining 23. The cold starts most frequently see warmer weather for the remaining period, but only a few are above the overall average (blue dash). The far outlier to the left in the image was 2005, where the average temperature was only 6 degrees for the first 8 days of December. Thankfully, above freezing temperatures are expected today and tomorrow. > NWS Watch/Warning Summary for 09 Dec 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 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: 0 [0.0 %] Reduction of Size Versus County Based [10.4 %] Average Perimeter Ratio [0.0 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [1461 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 Dec 11 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 11 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012111700.oBBH04e1003276@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 11 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-10 | Title : Blizzard Watch | Date : 10 Dec 05:55 AM | Votes : Good: 22 Bad: 5 +---------------------------------------------- The long advertised next winter storm system is set to arrive on Saturday with blizzard conditions expected over portions of northern Iowa. The featured map is of Friday morning watch, warnings, and advisories from the NWS. The bright green are areas under a blizzard watch for tomorrow. > NWS Watch/Warning Summary for 10 Dec 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 2 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: 2 Verified: 0 [0.0 %] Reduction of Size Versus County Based [52.9 %] Average Perimeter Ratio [6.6 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [8018 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 Dec 12 11:00:05 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 12 Dec 2010 11:00:05 -0600 Subject: IEM Daily Bulletin Message-ID: <201012121700.oBCH05L8029786@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 12 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-11 | Title : Blizzard Warning for the entire state | Date : 11 Dec 07:28 PM | Votes : Good: 42 Bad: 6 +---------------------------------------------- A powerful winter storm system is winding up this Saturday evening over Iowa with the entire state now under a blizzard warning as shown by the featured map. The counties shown in pink also have local civil emergencies warning motorists to stay home as no help will be available if they get stuck. Winds have been extreme with gusts over western Iowa topping 60 mph. In the wake of this storm system, very cold air is set to arrive on Sunday and Monday with highs hopefully in the single digits. > NWS Watch/Warning Summary for 11 Dec 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 7 0 | 0 0 0 0 0 | 1 Svr Tstorm 15 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: 22 Verified: 5 [22.7 %] Reduction of Size Versus County Based [61.1 %] Average Perimeter Ratio [43.7 %] Percentage of Warned Area Verified (15km) [8.0 %] Average Storm Based Warning Size [1874 sq km] Probability of Detection(higher is better)[0.70] False Alarm Ratio (lower is better) [0.77] Critical Success Index (higher is better) [0.21] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Mon Dec 13 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 13 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012131700.oBDH04WS022292@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 13 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-12 | Title : Blizzard Criteria | Date : 12 Dec 12:32 PM | Votes : Good: 38 Bad: 9 +---------------------------------------------- With the entire state under a blizzard warning during portions of Saturday and Sunday, one may wonder if the entire state experienced blizzard conditions. The term blizzard is typically applied to a period of at least three hours where visibilities are less than 1/4 mile due to snow or blowing snow along with wind speeds at or above 35 mph. People typically do not stand outside during strong winter storms, so it is hard for them to meet the three hour requirement and only report an instantaneous blizzard. Automated weather equipment struggles at low visibilities... The featured chart shows a comparison between reported three hour visibilities and wind speeds. Both plots contain two sets of data. The 'best wind' dataset includes the variable combination when winds were the strongest. The 'best vis' contains the observations when visibilities were the lowest. The x-axis is shown in log format, so to visually see smaller values. The left hand chart uses max/min values over the three hours, while the right hand chart uses simple averages (helping out the wind criteria). Even using the more lenient method, only ~20% of the sites in Iowa hit blizzard criteria in this qualitative form. For those that were outside, they probably considered the weather blizzard like.

Update: NWS Directive has the blizzard warning criteria as "Sustained wind or frequent gusts greater than or equal to 35mph accompanied by falling and/or blowing snow, frequently reducing visibility to less than 1/4 mile for three hours or more." (but no definition of what "frequently" means) > NWS Watch/Warning Summary for 12 Dec 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 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: 6 Verified: 0 [0.0 %] Reduction of Size Versus County Based [64.8 %] Average Perimeter Ratio [38.6 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [1583 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 Dec 14 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 14 Dec 2010 11:00:03 -0600 Subject: IEM Daily Bulletin Message-ID: <201012141700.oBEH03Ep001609@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 14 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-13 | Title : Minneapolis gets hit again | Date : 13 Dec 11:50 AM | Votes : Good: 19 Bad: 4 +---------------------------------------------- Iowa's third major snow storm is in the books now and the featured map is a crude analysis done by the IEM of reported snowfall totals. Areas to our north got the largest snowfall totals with a few isolated spots in Iowa reporting near 10 inches. Minneapolis, once again, was hit with heavy snowfall with the biggest news story being the collapse of the Metrodome roof. Our next winter storm arrives on Wednesday with the heaviest amounts expected over northern Iowa. > NWS Watch/Warning Summary for 13 Dec 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 Wed Dec 15 11:00:06 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 15 Dec 2010 11:00:06 -0600 Subject: IEM Daily Bulletin Message-ID: <201012151700.oBFH06ph001776@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 15 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-14 | Title : Will heavy snow come for central Iowa? | Date : 14 Dec 07:28 AM | Votes : Good: 21 Bad: 5 +---------------------------------------------- Central Iowa has missed out on the heaviest snowfalls this year. Numerical models have been teasing a snow storm for the middle of this week, but recent runs have backed off on the amounts and moved the heaviest totals to the north. The featured chart presents accumulated snowfall predictions using the Cobb method from weather model simulations from Monday evening. Whereas runs from yesterday morning had upwards of eight inches falling, the more recent guidance has little more than a dusting. > NWS Watch/Warning Summary for 14 Dec 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 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: 2 Verified: 0 [0.0 %] Reduction of Size Versus County Based [91.3 %] Average Perimeter Ratio [0.0 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [688 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 Thu Dec 16 11:00:05 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 16 Dec 2010 11:00:05 -0600 Subject: IEM Daily Bulletin Message-ID: <201012161700.oBGH0541003048@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 16 December 2010 > News +---------------------------------------------- | Title : Iowa Road Conditions Update | Date : 16 Dec 08:35 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/roads/ +----------------------------------------------

IEM delivered Iowa road conditions are not fully functional at the moment due to the upstream addition of some new road segments. It will take me a bit (today) to generate the GIS shapefile necessary to process these new segments. Your patience is appreciated. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-15 | Title : Slowing down traffic | Date : 15 Dec 05:51 AM | Votes : Good: 37 Bad: 3 +---------------------------------------------- This past weekend's blizzard brought traffic to a near halt across the state as blowing snow reduced visibilities to near zero at times. The featured chart looks at the combination of NEXRAD radar reflectivity, near surface wind speed, and observed traffic speeds from the RWIS site near Adair along Interstate 80 west of Des Moines. The chart clearly shows the impact of precipitation on traffic speeds as the arrival of snow caused traffic to slow around noon on Saturday. The situation deteriorated throughout the afternoon as more snow fell and thanks to 40 mph winds that blew around enough, eventually leading to road closure later that evening. Winds died down by Sunday morning and road crews were able to get I-80 open once again. > NWS Watch/Warning Summary for 15 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Dec 17 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 17 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012171700.oBHH04BB025672@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 17 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-16 | Title : Computers aren't perfect | Date : 16 Dec 05:49 AM | Votes : Good: 29 Bad: 5 +---------------------------------------------- Each day, computerized forecast models attempt to predict the weather and produce a lot of numeric output. One application of this output is to apply statistics to these values and attempt to produce more accurate forecasts (called Model Output Statistics [MOS]). The featured chart presents the range of MOS forecasts of daytime high and overnight low temperature for Des Moines from the GFS model along with the actual observations. In general, you can see that the MOS is by no means perfect, so there is currently room for humans to hopefully improve the process. > NWS Watch/Warning Summary for 16 Dec 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 Dec 18 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 18 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012181700.oBIH04hf014467@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 18 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-17 | Title : Snow Storm #4 | Date : 17 Dec 05:49 AM | Votes : Good: 24 Bad: 7 +---------------------------------------------- The featured map presents an IEM analysis of snowfall reports from our most recent winter storm. This storm thankfully dropped snow without much wind, so travel issues were mitigated some. Amounts ranged from a dusting over southwest Iowa to near 6 inches from near Mason City to Davenport. The forecast has a quiet period before the next winter storm arrives next week. > NWS Watch/Warning Summary for 17 Dec 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 Dec 19 11:00:15 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 19 Dec 2010 11:00:15 -0600 Subject: IEM Daily Bulletin Message-ID: <201012191700.oBJH0FjW031940@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 19 December 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 18 Dec 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 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 SVR+TOR Warnings Issued: 2 Verified: 0 [0.0 %] Reduction of Size Versus County Based [92.8 %] Average Perimeter Ratio [22.9 %] Percentage of Warned Area Verified (15km) [0.0 %] Average Storm Based Warning Size [126 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 Mon Dec 20 11:00:05 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 20 Dec 2010 11:00:05 -0600 Subject: IEM Daily Bulletin Message-ID: <201012201700.oBKH05Ou005862@despam-11.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 20 December 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 19 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue Dec 21 11:00:03 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 21 Dec 2010 11:00:03 -0600 Subject: IEM Daily Bulletin Message-ID: <201012211700.oBLH03TA032305@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 21 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-20 | Title : Another cold December | Date : 20 Dec 05:53 AM | Votes : Good: 25 Bad: 3 +---------------------------------------------- The featured chart presents the Iowa average December temperature along with a 30 year moving average. Five out of the past six years have seen well below temperatures, but nothing compared to 2000 or 1983. The moving average shows that the general trend has been for colder Decembers. Clicking the image will give a view back to 1893. > NWS Watch/Warning Summary for 20 Dec 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 11 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 Wed Dec 22 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 22 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012221700.oBMH04x4005282@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 22 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-21 | Title : Shortest daylight isn't coldest | Date : 21 Dec 05:46 AM | Votes : Good: 24 Bad: 3 +---------------------------------------------- Today is the winter solstice, when the daylight hours are the shortest for the year. Intuitively, one may expect this to be the coldest day of the year since it would have the least amount of sunshine. The featured map presents an analysis of the number of days after the solstice when the coldest day locally occurs. For Iowa, this works out being the middle of January. The east to west pattern over the United States is interesting as it takes a bit longer to cool the regions around the Great Lakes. > NWS Watch/Warning Summary for 21 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Thu Dec 23 11:00:13 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 23 Dec 2010 11:00:13 -0600 Subject: IEM Daily Bulletin Message-ID: <201012231700.oBNH0DA1016874@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 23 December 2010 > News +---------------------------------------------- | Title : New Webcam: Waterloo | Date : 22 Dec 11:46 AM | Author: Daryl Herzmann | URL : http://mesonet.agron.iastate.edu/current/webcam.php +----------------------------------------------

A new webcam has been added to the KCRG-TV CityCam network. This camera is mounted on top of the Isle of Capri Casino in Waterloo. This location is just south of the US-20, I-380, and US-218 interchange. Should make for some great shots of the traffic going by and provides some stereo views with the Iowa RWIS webcam located right next door. > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-22 | Title : Snow Storm #5 | Date : 22 Dec 05:49 AM | Votes : Good: 13 Bad: 4 +---------------------------------------------- Yet another winter storm brought accumulating snowfall to portions of north-eastern Iowa this December on Monday into Tuesday. The featured map presents an IEM analysis of NWS snowfall reports for 5th major snow storm of this winter season for Iowa. Rochester, Minnesota broke its total December snowfall record with another 10 days to go! Our next winter storm is set to arrive on Thursday, but this time the heaviest amounts are expected over southern Iowa which has been largely left out of the winter fun this December. The good news is that some drier weather is expected after Friday. > NWS Watch/Warning Summary for 22 Dec 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 2 0 | 0 0 0 0 0 | 0 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: 2 Verified: 1 [50.0 %] Reduction of Size Versus County Based [98.4 %] Average Perimeter Ratio [0.0 %] Percentage of Warned Area Verified (15km) [23.3 %] Average Storm Based Warning Size [1251 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 Fri Dec 24 11:00:07 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 24 Dec 2010 11:00:07 -0600 Subject: IEM Daily Bulletin Message-ID: <201012241700.oBOH07bo009061@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 24 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-23 | Title : Evolution of the forecast | Date : 23 Dec 05:57 AM | Votes : Good: 35 Bad: 5 +---------------------------------------------- The GFS weather forecast model is run by the US government and produces forecasts from the current time out to about two weeks into the future. The model runs for the past week have been advertising a snow storm for today into Christmas Eve. This forecast has evolved over time though as is presented by the featured chart. Each row in the chart represents a successive forecast model run. The area in white is outside the time domain of the given model's run output data (8 days). Model runs made on the 19th dumped a fair amount of snow on Ames for today, but have since backed off on the amounts and delayed the onset by 12 or more hours. Making sense of this changing forecast is one of the reasons why we still have humans diligently creating forecasts each day. > NWS Watch/Warning Summary for 23 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sat Dec 25 11:00:07 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sat, 25 Dec 2010 11:00:07 -0600 Subject: IEM Daily Bulletin Message-ID: <201012251700.oBPH07Hg024969@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 25 December 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 24 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Sun Dec 26 11:00:07 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Sun, 26 Dec 2010 11:00:07 -0600 Subject: IEM Daily Bulletin Message-ID: <201012261700.oBQH07ce006027@despam-10.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 26 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-25 | Title : Snow Storm #6 | Date : 25 Dec 07:59 AM | Votes : Good: 19 Bad: 4 +---------------------------------------------- Iowa's Christmas became that much whiter thanks to a snow storm that dumped upwards of 10 inches, with again the heaviest amounts over portions of northeastern Iowa. The snow was not accompanied by strong winds, so travel impacts have not been as bad as they could have been. The good news is that a brief respite from heavier snowfalls is expected, but the bad news is that the forecast models have been advertising a monster storm to ring in the new year. > NWS Watch/Warning Summary for 25 Dec 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 Dec 27 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Mon, 27 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012271700.oBRH04lc030419@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 27 December 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 26 Dec 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 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 No Warnings Issued -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Tue Dec 28 11:00:09 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Tue, 28 Dec 2010 11:00:09 -0600 Subject: IEM Daily Bulletin Message-ID: <201012281700.oBSH09jl006321@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 28 December 2010 > News No news is good news > Daily Feature No feature posted > NWS Watch/Warning Summary for 27 Dec 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 Wed Dec 29 11:00:06 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Wed, 29 Dec 2010 11:00:06 -0600 Subject: IEM Daily Bulletin Message-ID: <201012291700.oBTH069U013525@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 29 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-28 | Title : Snow inequality | Date : 28 Dec 07:30 AM | Votes : Good: 20 Bad: 5 +---------------------------------------------- The featured map presents modelled snow depth from the National Operational Hydrologic Remote Sensing Center valid at midnight. The numerous rounds of snow storms have left those in northeast Iowa with much more snow cover than those in far southwest Iowa. In fact, values range from near zero to near two feet! > NWS Watch/Warning Summary for 28 Dec 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 Thu Dec 30 11:00:04 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Thu, 30 Dec 2010 11:00:04 -0600 Subject: IEM Daily Bulletin Message-ID: <201012301700.oBUH04cH016918@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 30 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-29 | Title : Warmest temperatures so far | Date : 29 Dec 05:52 AM | Votes : Good: 20 Bad: 5 +---------------------------------------------- Warmer air is set to surge into Iowa ahead of the next storm system. The featured map shows the warmest temperature reported so far this December. The snow covered areas of eastern Iowa stand out with places like Dubuque only reporting 33 as its warmest temperature. High temperatures on Thursday are expected to approach these values shown. > NWS Watch/Warning Summary for 29 Dec 2010 Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 3 0 | 0 0 0 0 0 | 0 Svr Tstorm 7 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: 1 [11.1 %] Reduction of Size Versus County Based [66.0 %] Average Perimeter Ratio [18.2 %] Percentage of Warned Area Verified (15km) [6.0 %] Average Storm Based Warning Size [2296 sq km] Probability of Detection(higher is better)[0.63] False Alarm Ratio (lower is better) [0.89] Critical Success Index (higher is better) [0.10] -------------- next part -------------- An HTML attachment was scrubbed... URL: From akrherz at iastate.edu Fri Dec 31 11:00:08 2010 From: akrherz at iastate.edu (daryl herzmann) Date: Fri, 31 Dec 2010 11:00:08 -0600 Subject: IEM Daily Bulletin Message-ID: <201012311700.oBVH082x013890@despam-12.iastate.edu> Iowa Environmental Mesonet Daily Bulletin for 31 December 2010 > News No news is good news > Daily Feature +---------------------------------------------- http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2010-12-30 | Title : Warmer air, but it comes with fog | Date : 30 Dec 06:06 AM | Votes : Good: 25 Bad: 0 +---------------------------------------------- A push of warmer and moist air got under way yesterday afternoon pushing our temperatures above freezing. With plenty of snow around as well, this led to development of thick fog over most of the state. The featured chart presents the number of automated weather sites reporting less than a mile visibility for at least one observation per hour. The fog looks to continue today with an even warmer push of air into the state ahead of the next storm system. > NWS Watch/Warning Summary for 30 Dec 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 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: 6 Verified: 2 [33.3 %] Reduction of Size Versus County Based [65.8 %] Average Perimeter Ratio [50.7 %] Percentage of Warned Area Verified (15km) [10.5 %] Average Storm Based Warning Size [2067 sq km] Probability of Detection(higher is better)[0.40] False Alarm Ratio (lower is better) [0.67] Critical Success Index (higher is better) [0.22] -------------- next part -------------- An HTML attachment was scrubbed... URL: