Isolated thunderstorms hugged some of the higher elevations yesterday afternoon. Heavy storm above near Baboquivari at 3:41 pm MST. Plot of detected CG flashes below (from Atmo and Vaisala) is for 24-hours ending at 1:00 am this morning. Most activity was out in central Pima County, as per WRF forecasts yesterday.
Four sites in the Pima County ALERT network had rainfall - two up on Catalinas and two in the far southwest part of network.
The BL over metro area yesterday afternoon heated out to about 600 mb in temperature but was not well-mixed in moisture. Result was a nearly well-mixed, surface-based BL that did not reach 700 mb, with almost no CAPE at lower elevations. The WRF runs available so far indicate a similar situation today, with isolated showers and thunderstorms hugging higher elevations. The 12 UTC morning sounding for TWC (below from SPC) shows that low-level structures remain similar to yesterday, but that warm inversion at 500 mb caps the lower elevations even more than yesterday. Note that the vertical wind profile remains a chaotic and weak winds mess.
Appears that mid-week may be more interesting as Pacific anticyclone is pushed westward and PW remains fairly high.
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