Above shows light snow so far at Summerhaven General Store (7:30 am MST). At bottom is webcam view looking north from campus. Here at house it is raining lightly, with 0.42" in gauge so far. ALERT plot below (for northern 2/3rds of network) indicates widespread rains, with totals generally around a third of an inch. Four stations coming in at over half an inch.
Morning 500 mb analysis from SPC (above at 12 UTC) shows that south-to-north elongated, closed low is centered somewhere west of Yuma, with considerable cold air still coming our way. So far CG flashes (24-hours through 7:00 am this morning below, from weather.graphics and Vaisala) have been centered mostly over in Cochise County.
The TPW analysis (second below from MIMIC at 13 UTC) indicates a narrow band of low-latitude, high PW air trying to curl northward into southern Arizona. MIMIC has been down much of last 48-hours, so it was not possible to follow the advance of subtropic air northward.
More later.
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