A couple (here and here) of recent daily features denoted the lack of severe weather recently for Iowa. The featured chart checks in on the seasonality of NWS Severe Thunderstorm Warnings issued for Iowa. The data is partitioned by week of the year with the top panel presenting the number of years with at least one warning during the week and the bottom panel shows the overall total number of events. The tan horizontal bar attempts to estimate the meat of the season with it including about 80% of the total events. The peak of the season is somewhere between the third week of June and the first week of July. The recent lack of full sunshine and cool temperatures have certainly not helped fuel the typical summer time environment for severe weather.

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