Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
312 AM EDT Tue Oct 22 2024

Valid 12Z Tue Oct 22 2024 - 12Z Fri Oct 25 2024

...Greater Yellowstone...
Day 2...

A rather positively tilted trough extending WSW from southern BC
closed off into a mid-level low today west of WA. This low then
opens into a compact trough and ejects east Wednesday with the H5
trough axis crossing greater Yellowstone late Wednesday night. Snow
levels in the moisture ahead of this wave are 8000-9000ft. The
only snow probs for >4" in the WWD forecast period are on Day 2 and
in the 20-40% range over the northern Absarokas in MT and for the
Tetons. There is about a 10% risk for 6" in the Red Lodge portion
toward Beartooth Pass.


The probability of significant ice across the CONUS is less than
10 percent.

Jackson