9 Severe Thunderstorms Warnings Issued in 2021 in Black Hawk County
The National Weather Service in Des Moines has only issued a total of just seven Severe Thunderstorm Warnings in Black Hawk County in 2021. Even though that might seem low, it's slightly above the 36-year average of 7.8 Severe T-Storms/year in Black Hawk County, according to the Iowa Environmental Mesonet.
In 2020, the NWS in Des Moines issued 17 Severe T-storm Warnings in Black Hawk County.
So far this year, the Des Moines office of the National Weather Service issued two such warnings in the month of June, two in July, and five in August.
The most Severe T-Storm Warnings issued in a single calendar month by the Des Moines NWS are 11: July 2020, June 2017, and June 2008. The most in an entire calendar year are 21, which occurred in 2008 and also in 2017.
According to the graphic above, since 1986, there have only been TWO Severe Thunderstorm Warnings issued in Black Hawk County after the month of September. There has never been one issued within the county in the winter months of December, January, and February.
The lack of precipitation also greatly reduced the amount of Flood Warnings in Black Hawk County in 2021. Only two were issued, both in the month of August, the month where the majority of the Severe Thunderstorm Warnings were issued.
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