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Watch Friday's #derecho  on radar from start (Iowa/Illinois) to finish (coastal Mid-Atlantic).  

Take note of how the storms bow out with the highest winds found at the apex of the bow. Top wind speeds from Friday's derecho were clocked at 80 to 90 mph.

This radar animation spans over roughly 14 hours.

From +YouTube user:
Brian Gauspohl's profile photoKyle George (Kylino)'s profile photoSteven Hirnickel's profile photoRob Williams's profile photo
Looks like it really wanted to make a beeline for our nation's capital.
why was the forecast a slight chance of thunder storms
We had no warning.  We were doing farm chores late (because of the heat) and started out the door and it hit.  It was incredible.  No power and my daughter hiding in a closet for a couple of hours as trees laid down and the house shook from thunder/wind.
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