BBS: TELESC.NET.BR Assunto: HVYSNOW: Probabilistic Heavy Snow And Icing Discussion De: COD Weather Processor Data: Sun, 26 Apr 2026 05:58:08 +0000 ----------------------------------------------------------- FOUS11 KWBC 260557 QPFHSD Probabilistic Heavy Snow and Icing Discussion NWS Weather Prediction Center College Park MD 157 AM EDT Sun Apr 26 2026 Valid 12Z Sun Apr 26 2026 - 12Z Wed Apr 29 2026 ...Great Basin, Central/Southern Rockies, & the Black Hills... Days 1-3... A broad longwave trough over the western U.S. will direct a pair of 500mb shortwaves troughs across the Intermountain West today and the first half of the work week. A 250mb jet streak will place its divergent left-exit region over the Central Rockies, while ample 700-300mb layer moisture streams overhead, providing an ideal setup for mountain snow that extends from the Great Basin on east to the Black Hills. Snow levels over NV/UT dip from around 8000ft to about 7500ft while 9000ft snow levels in CO drop to 8000ft Sunday evening. The heaviest snowfall will occur on Sunday from the Wasatch and Uinta on east to the CO Rockies and northward to the Wind River and Big Horn Ranges. As the longwave trough continues to see spokes of 500mb vorticity maxima move through, light-to- moderate snowfall will linger over the central and northern Rockies through Monday and even into Tuesday. 72-hour WPC probabilities show high chances (>70%) for >12" of snowfall in the peaks of the eastern NV Great Basin, the Uinta/Wasatch, and the CO Rockies above 9,000ft. Similar high chance probabilities exist for >8" of snowfall in the Wind River, Tetons, Absaroka, and Big Horns. These peaks sport lot-to-moderate chances (20-40%) for localized snowfall totals topping 12" through Tuesday. Only the highest mountain passes will get impactful snow, so the impending snowfall will mainly be a beneficial event for these drought-stricken area. The probability for significant icing over one-tenth of an inch is less than 10 percent. Mullinax $$ = = = To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.28-Linux * Origin: Capitol City Online (1:2320/107) ----------------------------------------------------------- [Voltar]