Late Wednesday afternoon, severe thunderstorms raced through central Iowa prompting the NWS to issue a number of Severe Thunderstorm Warnings. These warnings were issued during the time of day that has approximately the highest temporal frequencies as shown by the featured chart for Story County. The plot presents frequencies on a minute- by-minute basis. It is kind of interesting to see no events at around 8 AM. Our severe weather typically develops to our west during peak afternoon solar heating and then trucks it into our area late evening. The overnight storms are a combination of these storms and those forced by something called the Low Level Jet, which pumps muggy air into the state fueling elevated thunderstorms with associated wind and hail threats.

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