The midnight run of Atmo's WRF model forecasts precipitation across all of Arizona as the 500 mb short wave along the California coasts digs further south and moves eastward tomorrow and tomorrow night. Total model forecasted precipitation through 11 pm Monday night is shown above. The accumulated snowfall prediction is shown below. The model forecasts a significant snow event across elevations of southeast Arizona higher than around 4,000 ft MSL. Snow accumulation is indicated along I-10 between Tucson and Benson and over Texas Canyon. Snow accumulation is also forecast along Highway 83, with snow reaching down across the border in several spots. The WRF model forecasts 500 mb temperatures to fall below -30C late Sunday night and Monday morning. Thicknesses during this period fall to 5340 m or lower - indicating that, if snow showers are still occurring, we could even see some flakes here at the house. The long-range, global model forecasts for this event were amazingly good!
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