Friday, January 27, 2023

End Of January



View of vivid blues skies over the Catalinas at 8:25 am MST this morning. Forecast models continue to indicate chances for light showers at end of the month.

The GFS forecast for 500 mb (above from 06 UTC runs) forecasts a very sharp trough over Arizona at 11:00 pm MST on the 31st. However, forecast of PW from same runs (below) indicates that the trough will have little moisture to work with.


Forecast for precipitation through that time (above) indicates little over most of Arizona. The 00 UTC run of the WRF-GFS at Atmo (below) is a bit more optimistic for area with precipitation (mostly very light) for all of Pima County. So, there'll be some chance for a bit more January at the airport and across the Metro area.

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