It is absolutely crazy that Iowa was hit by another Derecho and this time during the month of December. The Storm Prediction Center, which tracks Derecho occurrences, is currently calling the storm system that hit Iowa last Wednesday a "Serial Derecho". The serial portion of the name gets into some meteorology nuance of the event, but the derecho portion of having a long track and long time duration of continuous high wind speeds associated with convection applies. The featured movie presents the combination of NEXRAD mosaic, NWS Severe Thunderstorm / Tornado Warnings, and any thunderstorm related severe wind gusts from Local Storm Reports (LSR)s. The bottom panel attempts to illustrate how continuous in time the reports were as each report is given by a bar of 5 minutes width. You'll notice over ten hours of overlapping bars, which indicates no breaks in the reports.

Voting:
Good = 23
Bad = 2

Tags:   dec152021