Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
429 AM EDT Wed Oct 23 2019

Valid 12Z Wed Oct 23 2019 - 12Z Sat Oct 26 2019

...Rocky Mountains and Southern High Plains...
Days 1-3...

A mid-level trough will dig south down the Rocky Mountains through
Thursday. There is only good model agreement on movement of this
trough through Wednesday night. On Thursday (Day 2) the ejection
of this trough east becomes much faster in the 00Z GFS and then
through Thursday night the CMC is the slowest while the ECMWF is a
little faster. Preference is given to the 00Z ECMWF. 

Light to moderate snow can be expected over south-central and WY
higher terrain today. Rates increase with heavy snow expected for
the CO Rockies tonight and the northern NM Rockies Thursday as the
dynamics increase with the digging trough. The jet streak pushing
south into the Northwest increases from around 130kt this morning
to over 150kt this evening over MT and WY. WPC probabilities are
high for 8 inches in the highest terrain of the Rockies and Sangre
De Cristos, with low probabilities for 4 inches extending into the
High Plains.

Snow the continues through Thursday night as a comma head
develops. This should spread light snow across the TX Panhandle
where there are low to moderate WPC probabilities for two inches.

The probability of significant icing is less than 10 percent.

Jackson