The 13Z water vapor image above has a nice view of the current cutoff just west of San Francisco. This feature is heading south and will eventually move ashore in the far Southwest US near San Diego. The image also shows a very large area of subtropical moisture west of Mexico. This morning's NAM run (Tues 9 February) takes the bulk of this moisture blob across Mexico and into New Mexico and west Texas. But the model forecasts do manage to pull some of this up into southeast Arizona before the event ends. So, an interesting interplay of features to keep and eye on!
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