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Heavy mountain snow targeting a few SW Montana mountain ranges this weekend November 30, 2012

Posted by mikeheard in Uncategorized.
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University of Washington MRF-GFS 72 hours snow accumulation forecast ending Dec. 3rd is predicting an impressive but localized heavy snow event in SW Montana. Monida Pass over the West Yellowstone down through western Wyoming could 1’ to 3’ of mountain snow this weekend.

Winter Storm Warnings are up for southern Beaverhead, Southern Madison and Southern Gallatin counties through early Monday morning. Snowfall estimates of 10”-20” and strong winds over 40mph will produce hazardous travel conditions for Monida Pass, Targhee pass and Raynolds pass.

Another area of concern is Wisdom to Georgetown Lake and the Pintlar Wilderness areas. Estimated snow accumulations in this region in the 12” range. The Rocky mountain front is also expecting a heavy dumping of snow as well as central Idaho and the Cascade mountains in Washington and Oregon.

The other image in this post is of TPW (total precipitable water) and shows an AR or atmospheric river setting up pumping subtropical moisture into Northern California. Several AR’s in November have been responsible for massive rainfall reports along the coast in Washington, Oregon and Northern California with a few areas in NW Oregon reporting over 75” of rain in November alone.

msnow72.72.b0000AR-Nov30-12

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