Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
430 PM EDT Thu Oct 03 2019

Valid 00Z Fri Oct 04 2019 - 00Z Mon Oct 07 2019

...Northwestern U.S....
A trough currently just off the Pacific Northwest coast will shift
east; crossing the northern Rockies Friday night. Snow elevations
around 5000ft will prevail through this event across the
northwestern CONUS. The combination of modest Pacific moisture and
strong lift from the trough will promote heavy snow on the higher
Cascades tonight into Friday. Some Gulf of Mexico sourced moisture
reaches the northern Rockies Friday, allowing the heaviest snow to
occur in around a 12 hour window ahead of trough axis for higher
terrain in ID Friday morning into MT and WY then through Friday
night. Probabilities for over six inches are best on the western
side of the Lewis Range and in the Absarokas, Tetons, and Bighorn
Mtns.


...Northern New England...
Low pressure currently shifting east from Lake Superior will cross
northern New England late tonight. Light snow accumulation is
expected late tonight for higher elevations of interior Northern
New England; the first snowfall of the season.

Jackson