The start of meteorological summer

Meteorological summer (June 1) is just around the corner. We will be approaching the start of meteorological summer on a warm note. Readings could top 80 becoming the warmest in a week. This can also be the warmest start since June 1 2007 in which we reached 85 degrees. Below is a list of the number of 80 or more degree days through June 1 dating back to 1998.

# 80+ degree days thru June 1
1998 11
1999 7
2000 9
2001 11
2002 8
2003 3
2004 9
2005 7
2006 8
2007 16
2008 3
2009* 5

*Through 5/29/09

The 11 year average of days dating back to 1998 is 8. So we are slightly behind schedule.

How rare are one day 100+ tornado producers??

There was a question that came up on how rare is a one day 100+ tornado producer. I recently researched that going back to 2000 and there is not a day that produced over 100 tornado reports. However, there are 9 (2 day periods) that helped to produce 100+ reports. Of the 9 days 6 happen to be in the month of May. 3 of the 9 happen to occur on other months. The most recent of these events occured in April 9-10 2009.

Just May
May 29-20 2004 170 reports
May 4-5 2007 122 reports
May 4-5 2003 117 reports
May 10-11 2008 112 reports
May 22-23 2008 112 reports
May 6-7 2003 109 reports
* Note the month of May happens to be the peak month in the United States for tornado outbreaks.

Other months
Feb 5-6 2008 131 reports "Super Tuesday Outbreak"
April 9-10 2009 116 reports
June 23-24 2003 103 reports

Wednesday's potential severe weather outbreak

With temperatures in the 70s, dewpoints in the mid 60s, and an upper level trough with a pretty strong jet spells for a significant severe weather event Wednesday evening. The threat exist from as far north as Green Bay, WI northeast to Traverse City, MI down to Ft. Wayne, IN stretching southwest to Oklahoma. The moderate risk is for north central IL extending to central MO. This moderate threat is where we expect to have the biggest outbreak. Hail, damaging winds and tornadoes. There will be a line of stoms extending from Michigan to Oklahoma. The timing as far as the storms affecting Chicago seems to be between the hours of 7 and 10pm all associated with a cold front. If everything verifies, this will be our first outbreak of the season.







Here are the storms out in the plains below stretching from Iowa to Arkansas. Cloud tops are anywhere from 30,000 to 50,000ft. Hail and wind are the reports so far.

Southern Missouri Northern Arakansas severe weather

A derecho is currently taking place down south in MO and AR. This storm is capable of producing winds over 80 mph, hail and tornadoes. Jonesboro, AR and Paducah, KY are just a couple cities in line of this storm.

http://www.spc.noaa.gov/products/watch/ww0267.html



Reports already.


Here are a couple videos of that derecho.

Cowboys assistant paralyzed in facility collapse

Cowboys assistant paralyzed in facility collapse

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