There was a significant upturn in storm activity yesterday - much more so than indicated by the morning model runs. All of the NWS ASOS stations in southeast Arizona had measureable rainfall and 10 of the ALERT sites had rain. Amounts were generally light except in the far southeast corner of state - Rucker RAWS had 0.61" and Douglas had 0.25". The airport and DM carried thunderstorms and light rain before midnight. The IR satellite image and the Tucson radar image (top 2 graphics) at 0130 and 0210 UTC show the large and intense MCS in northern Sonora and the Borderlands. This MCS produced a a very significant meso-outflow that brought cooler air and recycled low-level moisture to all of southeast Arizona. The bottom graphic above is a surface plot from NCAR for 05 UTC (10 pm MST) last evening - it shows the outflow strung out across southeast Arizona. Here at house we had south winds and a smell of rain. Winds generally gusted 30 to 50 mph as the outflow passed observing sites in this part of the state. Note that the Atmo weather station appears to have gone down during the night, so nothing to report from there.
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