IEM Daily Feature
Thursday, 20 April 2017

10% Tornado Risk

Posted: 20 Apr 2017 04:12 AM

With the late morning update yesterday, the Storm Prediction Center had a 10% tornado risk analyzed over parts of Iowa for Wednesday. Thankfully, only a few brief tornadoes were reported near Carroll. The 10% risk threshold only happens a few times each year as highlighted by the featured plot. The map presents the average yearly frequency of having a 10% risk threshold issued. The values for Iowa are in the 1 to 3 days per year range. Kind of interesting to see the highest frequencies show up in the eastern portions of the traditional "Tornado Alley".

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Tags:   spc   tornado