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Flash Flood Warning Timing

26 Jul 2024 05:30 AM
A slow moving and heavy rainfall producing storm over the far southeastern tip of Iowa Thursday morning prompted NWS Davenport to issue a Flash Flood Warning. This warning was issued just before 8 AM, which is not necessarily the most common time of day for such warnings. The featured chart presents the time of day frequency of a Flash Flood Warning being active for those issued by NWS Davenport. The tan area represents all the events with the blue line highlighting the frequency of just those during July. The early afternoon hours are the least frequent time as typically thunderstorms have yet to fire. The peak of accumulated heating comes later toward about 3 PM and the rapid increase in warnings at that time coincides with the increase in thunderstorm activity.

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Tags:   flashflood