BBS: TELESC.NET.BR Assunto: HVYSNOW: Probabilistic Heavy Snow And Icing Discussion De: COD Weather Processor Data: Sat, 2 May 2026 08:07:20 +0000 ----------------------------------------------------------- FOUS11 KWBC 020807 QPFHSD Probabilistic Heavy Snow and Icing Discussion NWS Weather Prediction Center College Park MD 407 AM EDT Sat May 2 2026 Valid 12Z Sat May 02 2026 - 12Z Tue May 05 2026 ...Sierra Nevada... Days 2/3... A large, but modest amplitude mid-level low will swing onshore central California Sunday night and drift to southern CA through Monday night. Upslope precip begins Sunday afternoon, but snow levels will be around 9500ft before dropping to around 8000ft late Sunday night. Snow levels will then be around 7500ft under the low on Monday when the precip should be the most consistent. Day 3 snow probs for >6" are generally 40-70% for the High Sierra. ...Wyoming and Colorado... Day 3... Low pressure swings through western Ontario Sunday night with a potent cold front sweeping down the Northern Plains in its wake. A digging mid-level trough behind the front provides lift over an existing frontal boundary ahead of the aforementioned low moving over CA before the cold front shunts activity a bit farther south on Tuesday. There is uncertainty in the placement of this frontal zone with the GFS farther north in central WY and the EC remaining farther south along the WY/CO border. The front should be fairly stationary once it is set up, so there could be a decent duration to precip with snow levels dropping to around 7000ft behind the cold front. Day 3 snow probs for >6" are 30-60% in the Wind River and Bighorn ranges as well as around 50% on the Laramie Mtns and 20-40% on the Front Range in northern CO. Decently heavy mountain snow then persists through Tuesday, so more info is to come on this system. The probability for significant icing over one-tenth of an inch is less than 10 percent across the CONUS. 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]