View of the Catalinas at 6:00 am MST this morning.
There were thunderstorms over eastern Pima County yesterday afternoon (see plot of detected CG flashes above, from Atmo and Vaisala, for 24-hours ending at 0833 UTC last night), although there was a distinct minimum from Santa Cruz county north across much of the metro area.
There were scattered observations of rainfall across much of the ALERT network (above and below for 24-hours ending at 7:30 am) - with some sites having over an inch in the Redington Pass area. Here at the house we had only 0.03"; Atmo had 0.46"; the airport reported 0.10" with gusts to 43 mph; and DM recorded 0.43" with gusts to 45 mph.
At 500 mb (above from SPC) the large anticyclone's main center has shifted to southern Colorado, with a less distinct center over the lower Mississippi River basin. There is a shortwave to our south that is oriented west-to-east.
The morning TWC/TUS sounding (below - also from SPC) remains moist, with a deep, old BL, and considerable CAPE. Winds aloft above 700 mb are easterly to southerly with speeds of 20 to 30 kts. Steering flow today would be from the east.
The 12 UTC run of the WRF-HRRR at Atmo (above - valid through midnight tonight) forecasts most precipitation in our area to occur to the northeast and southwest of the metro area. The current morning forecast from TUS NWS for the airport is shown below.
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