Photo of storm on north side of catalina Mountains on Sunday evening 30 August 2009. There have been rumbles of thunder, some outflows, and smell of rain this late afternoon and evening here at house. Observed CGs with this storm but it could not maintain itself across the Catalinas. A pleasant start to what will be very substantial changes next 48 hours. It appears this evening that a sustantial surge of low-level moisture is underway over the GoC and this fits with the WRF forecast discussion today - see
http://www.atmo.arizona.edu/products/models/forecasts/wrf_disc.html
The probabilities of precipitation will increase markedly tomorrow and Tuesday as moisture increases and several short-waves approach from the south. An excellent shear profile for severe thunderstorms tomorrow if the CAPE increases.
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