Large thunderstorms developed early this afternoon and stayed mostly locked to the mountains through midafternoon. Then outflows drove new storm developments in all directions. The photo at top is looking to northeast from here - the heavy storm had developed as two outflows converged in the foothills. This became a large and nasty storm with frequent CGs and very heavy rains. We had an outflow from the east with gusts of 30 to 40 mph, but no convective cores moved across here. As of 5:30 pm MST we have had anvil rains here of about 0.14". However, at 5 pm 64 of the 93 ALERT sites had had rainfall, with 10 sites having more than an inch in past 6-hours and two sites exceeding two inches - heaviest rains were in the Catalinas and foothills. The composite radar image at 5:30 pm (bottom) shows widespread echo and embedded cores across much of southeast Arizona, with the northwestern most storms approaching the Phoenix area.
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