The final short-wave trough with the large 500 mb cutoff has been producing rains over southeastern Arizona since about midnight. At sunrise this morning the mountains have a light covering of snow - Catalinas bottom image and Kitt Peak top. Looks and feelsquite like winter out there!
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The Pima County ALERT gauges indicate that almost 100% of the gauges had rainfall during past 24 hours. Amounts were light - mostly from a tenth to a quarter of an inch. Three sites had slightly more than half an inch and these were in the south part of the network. Most of that heavier rain was after midnight and the NAM forecasts last evening indicated heavier QPF toward the borderlands. Here at the house at 6 am the temperature was 43F and it was raining very lightly. Rainfall here was 0.08" with 0.02" of that occurring yesterday afternoon. There were some lightning strikes in northern Mexico yesterday, with the northern most strikes occurring along the border west of Nogales. So, this event has been interesting, but not very wet with a total so far of only a tenth of an inch here at the house.
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Tucson international airport recorded a record low high yesterday of 59F.
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