Post has been edited to add two photos of mammatus taken yesterday afternoon, as thick anvils spread overhead from storms to south-southwest.
Showers south of Kitt Peak yesterday early afternoon.
ALERT shows scattered rainfall reports for 24-hours ending at 5:30 am MST this morning. Only amount greater than half an inch occurred west of Green Valley at Keystone Peak. The airport received 0.39" in an afternoon thunderstorm with gusts to 39 mph. Here at house we had only 0.03" and DM came in at 0.02".
Below is detected CG flashes (from Atmo and Vaisala) for 24-hours ending at 12 UTC (5:00 am) this morning. Thunderstorm activity in eastern Pima County mostly stayed south of Metro area. Ongoing morning storms across central Arizona.
Above figure shows topsy-turvy time series for TUS. Below is the 12 UTC TWC upper-air sounding from this morning. Sounding shows abundant moisture (below 700 mb) and considerable CAPE. Storms should readily form with daytime heating. The sounding profile is actually similar to Plains severe storm profiles, with strongly veering winds below 500 mb.
Large area of state under flash flood watches today and tomorrow (above), as per early morning forecast from NWS (below) for TUS. At bottom is 06 UTC WRF-GFS forecast of composite radar echoes valid at 8:00 am tomorrow morning. The forecast indicates a very large MCS affecting much of southeastern Arizona.
The morning storms forecast for our area this morning did not materialize, and we'll watch to see what happens tonight.
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