Monday, August 22, 2016
Quiet Days Ahead
Ron Holle shot the above photo of a microburst on Saturday evening (August 20th) a bit before 7:00 pm MST (time corrected). He was looking south from the Desert Museum and estimated surface winds of 40 to 50 mph, based on the blowing dust.
Fair coverage of rainfall yesterday brought thunder and gusty winds of 30+ mph here at house, but only 0.01". The ALERT network reports for 24-hours ending at 7:00 am above indicates 32 sites with rainfall - most of these were in the southern half of the network, where the areal coverage was very high. Radar/gauge rainfall from Maricopa County Flood Control for same period below fits the observations quite well. Plot of CG flashes (from Atmo and Vaisala) is at bottom, showing that the metro area was mostly devoid of storms, except for the cells across I-10 just out west of here.
Slow dry-out continues and WRF models forecast only very isolated mountain storms for southeast Arizona next several days, as Fall-like pattern continues.
Posted by Bob Maddox at 7:38 AM