Light showers and some thunder affected much of the area, mostly after midnight, last night.
ALERT network observations (above) for 24 hours ending at 7:30 am MST this morning. Looks like about half of the sites had 0.04" or more. Here at house we had only a Trace; Atmo measured 0.21"; TUS 0.16"; and DM 0.11".
Composite radar image above is from 2:43 am, showing the scattered nature of the echoes over our region. Plot of detected CG flashes (below, from Atmo and Vaisala) shows that some of the echoes were thunderstorms.
The morning 500 mb analysis (above) shows the anticyclone is centered over southwest Colorado, and is quite elongated from southwest to northeast. The 12 UTC sounding plot for TWC/TUS (below, from Univ. of Wyoming webpage) continues very moist and unstable - note that PW is just over two inches. Easterly winds have increased some, with steering winds around 20 to 25 kts). Visible satellite image at bottom shows skies to be mostly clear over the eastern half of Arizona.
Storm development today will be driven by orography and heating. Model forecasts indicate limited storm activity for eastern Pima County; however, the general situation appears basically similar to last few days.
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