Heavy weather, snow and rain, continues over much of the West as we start a new week. The IR satellite image above is from a bit after 7:00 am MST this morning. Heavy clouds have extended eastward over most of Arizona, and rains have slipped south to southern California, as an atmospheric river (AR) from low-latitudes makes landfall there (MIMIC PW from 12 UTC this morning below).
The dreary views from campus and campus and Kitt here - above and below - about 8:30 am this morning. Yesterday, with abundant sunshine, the high temperature at the airport reached 81 F.
The global models are forecasting a 500 mb low into the Southwest by the end of the week, with perhaps a chance of some precipitation in our part of the state. The ECMWF 500 mb forecast above is valid at 5:00 pm on the afternoon of Friday the 13th. Below are the 06 UTC QPF plumes for the airport - these indicate a mixed bag for the end of week and weekend, as many of the members forecast at least a chance of rainfall at the airport.
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