BBS: TELESC.NET.BR Assunto: HVYSNOW: Probabilistic Heavy Snow And Icing Discussion De: COD Weather Processor Data: Sun, 26 Apr 2026 19:00:29 +0000 ----------------------------------------------------------- FOUS11 KWBC 261900 QPFHSD Probabilistic Heavy Snow and Icing Discussion NWS Weather Prediction Center College Park MD 300 PM EDT Sun Apr 26 2026 Valid 00Z Mon Apr 27 2026 - 00Z Thu Apr 30 2026 ...Great Basin through Central/Southern Rockies onto the Northern Plains... Days 1-2... Upper low over central Saskatchewan is beginning to lift northeast while an appendant positively-tilted trough axis lingers over the northern Rockies to far northern CA. A leading shortwave trough approaching the CO Rockies will strengthen in left-exit jet dynamics with a potent lee-side trough crossing the south-central Plains tonight, reaching the Great Lakes by Monday evening. The northern fringe of this low pressure system will produce some snow tonight over eastern WY into MT and across ND. Locally moderate terrain based snow (up to 1.5"/hr rates per the 12Z HREF and REFS) continues through tonight ahead of the main trough axis with snow levels of 8000ft (in NV/UT) and 9000ft (in CO/southern WY) drop about a thousand feet through the night. Day 1 snow probs for >6" are 40-80% over the central NV ridges, higher central UT Ranges through the Wasatch and Uinta, western and central CO Rockies, central ID ranges, and the Wind River, Absaroka, and Bighorns. The main trough axis shifts east across the Rockies Monday night into Tuesday with mainly lee-side forcing ahead of this trough axis aided by a 1025mb surface high centered over ND. Day 2 snow probs for >6" are 30-60% for the Laramie Range in WY down into the Park and Front Ranges in CO with snow levels around 7000ft. The probability for significant icing over one-tenth of an inch is less than 10 percent. Jackson $$ = = = 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]