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SHORT WINDOW FOR SEVERE STORMS...

The Storm Prediction Center has issued a severe thunderstorm watch until 6:00 PM for a small part of eastern Iowa and much of western Illinois.

A strong low pressure situated east of Iowa City will drive a potent cold front quickly east during the afternoon. Effective shear and instability will be sufficient for strong thunderstorms some of which could produce winds up to 70 mph. An isolated tornado is even possible. The greatest risk will be from the Mississippi River east into Illinois.


A significant temperature contrast exists that is fueling the set-up with snow falling in NW Iowa and temperatures in the mid 20s. Meanwhile parts of SE Iowa and WC Illinois are in the 70s.

As the front zips east the threat of any strong storms ends in eastern Iowa between 3-4 PM and quickly ends in Illinois by 5-6 PM. Rains will end early this evening from west to east followed by much colder temperatures.


By the way, pre-sales continue for my new book Derecho 911, Iowa's Inland Hurricane. Order now and you can get yourself a discount on this historic Midwest storm. Click on the link below to get your copy or find out more about the content of this coffee table type book. It's color with more than 100 pictures and diagrams.


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© 2020 Terry Swails