Saturday, August 24, 2024

Light Showers Yesterday

Buildups over the Catalinas at 5:50 am MST this morning.


Plot of detected CG flashes (above, from Atmo and Vaisala for 24-hours ending at 0803 UTC last night) indicates widespread thunderstorm activity over eastern Pima County yesterday afternoon.

The ALERT network observations (below for 24-hours ending at 7:00 am this morning) show essentially 100 percent coverage across the main metro area. However, amounts were generally light, with only five sites reporting half an inch or more. Here at the house we had 0.15" during a thunderstorm around 5:00 to 5:30 pm; the airport reported  thunder with gusts to 49 mph and 0.10"; DM had 0.13"; and Atmo came in with 0.11".



Data continue missing for Tucson, but 500 mb analysis (above from SPC) indicates winds across Arizona from the southwest at 30 to 40+ kts. The anticyclone center has shifted to the Kansa/Oklahoma border.


The 12 UTC run of the WRF-HRRR at Atmo forecasts rainfall through midnight mostly near and west of the airport. The morning forecast from the NWS (below) continues to forecast POPs of 20 to 30 percent.

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