Photo above sent by Mike Leuthold (taken by state trooper) shows blowing dust and a three-semi wreck near San Simon that has closed I-10 this afternoon. Will likely be some unhappy FedEx customers this week. Several sites have reported gusts to near or above 50 mph this afternoon across southeastern Arizona.
Meanwhile, David Blanchard reports thundersnow in Flagstaff area and flash density chart below (from weather.graphics and Vaisala) shows considerable thunderstorm activity in the Southwest, especially Utah.
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