06/29/12 Derecho

There are 921 damaging wind reports from this derecho. And yes, all 921 reports went into this custom radar loop. Each box represents a wind report. Some frames have clusters that show up only to vanish during the next image. This isn't necessarily meaning that there is no wind at the location, rather the reports fell in one frame but not the other. One can see continuing damaging tracks likely from updraft mesovortices along the line edge. These mesovorticies, with the exception of the reports from Raleigh (from a gust front) dominate the northern portion of the line near the end of the loop. There is a great increase of wind reports east of the Appalachian Mountains: this is because descending a leeward slope induces stretching of the vortices along the line. Enjoy the loop!

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***NEW video: better resolution, better for squall line induced vortices***