Showers began here at the house about 5:30 pm yesterday (Sunday, December 30th) and this morning 0.42" had fallen at house. Better than I had expected (web cam above shows what appears to be a fairly light snowfall on Mt. Lemmon), and light rain continues. It is hard to know quantitative details on precipitation across eastern Pima County, since many gauges experienced both rain and snow. Coverage was essentially 100%. Low here at house was 38F and rain was not close to mixing with snow. Morning sounding at NWS Tucson failed, so there is no hard information on local thickness. The NAM analyzes 534 dm but subjective analysis indicates that this may be too low (my estimate was 536 to 538 dm). Regardless the snow level did not come down as low as some model forecasts indicated. The NWS winter weather advisory (below) from yesterday was quite good, indicating snow level would stay at or above 3500 ft MSL. I also note that this advisory painted the exact area affected by the advisory, which is good. Happy New Year to all - more next year!
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