Last week, several NASA satellites watched a derecho form across the Eastern United States and knock out power to millions of people. Here’s satellite footage from the GOES-13 satellite.
The Aqua satellite with its Atmospheric Infrared Sounder instrument recorded the storm, which was over 100 miles wide with winds over 90 mph. The derecho winds stay straight, instead of twisting as a tornado does. The Suomi National Polar-orbiting Partnership satellite (not to be confused with SUMI) captured these before and after images of the mid-Atlantic states. You can see a lot of small towns in Virginia and West Virginia without power and much dimmer lights in the DC area, particularly in the northwest.
I guess I’m surprised by the large number of people still without power. Must be heavy and widespread damage.