Severe thunderstorm hit portions of the Phoenix metro area yesterday afternoon, with Sky Harbor measuring low visibility and gusts to 63 mph. Photo above is by Bruce Haffner - posted to Twitter (see either Mike Olbinski's or Bryan Snyder's Twitter links). Looks to be a fairly large downburst from a high-based storm.
Meanwhile, from far to the southeast, Mike Leuthold posted the photo below from Paradise in the Chiricahua Mountains.
There was a bit more storm activity over eastern Pima County yesterday - the CG FD for 24-hours ending at 6:00 am MST this morning (above from weather.graphics and Vaisala) shows high flash density on north side of the Catalinas. Also there is a bit of a donut hole over the metro Tucson area. The Catalinas sector of the ALERT network (below) shows heavy rain amounts on the north side of the mountains. We had a light shower here at the house after 5:00 pm that left 0.02" in the gauge. Most of the metro area had only light sprinkles yesterday.
This morning's sounding from TWC continues with about an inch and a half of PW and moderate CAPE. Steering winds are from the southeast at 10 to 20 kt, while upper winds are light. This looks to be a fairly decent sounding for more heavy storms this afternoon and evening. Mountain locations favored, but decent chance for outflow triggered storms in the metro area.
The WRF-NAM forecast from 06 UTC for rainfall through midnight tonight is shown below. The GFS version is once again more active for eastern Pima County.
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