Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
254 PM EDT Sun Oct 08 2023

Valid 00Z Mon Oct 09 2023 - 00Z Thu Oct 12 2023

For Days 1-2, the probability of significant snow or ice
accumulation across the contiguous U.S. is less than 10 percent.

...Day 3...
Northern Rockies...

Upper low approaching the Pac NW will translate southeastward and
weaken a bit as a 100-110kt jet extends through northern NV/UT. A
surface cold front will cross the Divide and bring in colder air
to the northern Rockies as 700mb temps drop below 0C. Snow levels
will lower from 9000ft late Tue to around 7000ft post-FROPA. WPC
probabilities for at least 4 inches of snow are 10-50% over
portions of south central MT and into the Bighorns, continuing
into day 4, with the highest probabilities above 9000ft.


Fracasso