FOUS11 KWBC 290626
QPFHSD

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
226 AM EDT Thu Oct 29 2026

Valid 12Z Thu Oct 29 2026 - 12Z Sun Nov 01 2026

...Sierra Nevada into the Intermountain West & Four Corners...
Day 3...

Very deep upper level trough (<10th climatological percentile per
the NAEFS) along with a southern shortwave ejecting out of the
subtropical Eastern Pacific will interact along the West Coast by 
late Saturday into Sunday to surge ample moisture into the 
Southwest and Intermountain West. Snow levels are expected to 
remain rather high ahead of this system, starting out above 
9,000-10,000 feet across the Southwest, Great Basin and 
central/southern Rockies before levels begin to drop around 8,000 
feet and much lower across the northern Sierra and northern CA into
the Northwest underneath the upper trough early Sunday, but these
colder areas are expected to remain outside of the primary 
moisture transport. Additional mountain snow and eventually
lowering snow levels are anticipated into the Day 4 period (by
Monday morning).

In general, the best chances (40-70%) for snowfall totals greater 
than 6 inches through early Sunday are anticipated to remain across
the high terrain of the Sierra Nevada (above 9000 feet) and 
Sawtooths of ID (above 8500 feet), with heavier accumulations not
expected across the mountainous terrain of UT and the
central/northern Rockies until later into the weekend and early
next week.


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


Snell



$$
--- MultiMail/DOS
 * Origin: capitolcityonline.net * KY, USA (618:250/10)