BBS: TELESC.NET.BR Assunto: HVYSNOW: Probabilistic Heavy Snow And Icing Discussion De: COD Weather Processor Data: Sat, 18 Apr 2026 05:59:31 +0000 ----------------------------------------------------------- FOUS11 KWBC 180559 QPFHSD Probabilistic Heavy Snow and Icing Discussion NWS Weather Prediction Center College Park MD 159 AM EDT Sat Apr 18 2026 Valid 12Z Sat Apr 18 2026 - 12Z Tue Apr 21 2026 ...Upstate New York/Northern New England... Day 2... A strong cold front driven by a potent vorticity streamer/shortwave embedded within larger cyclonic flow centered over the Great Lakes will race eastward across Upstate NY and New England early on Sunday. The cold front likely outraces the accompanying mid-level trough axis, which results in continued SW flow aloft, keeping sufficient moisture present in the column as the low-level thermals cool dramatically. This suggests that precipitation ahead of the front, which will be rain, will rapidly transition to a period of snow behind the front, especially in the higher elevations of the Adirondacks, Greens, and Whites. The duration of snow after changeover will be limited due to subsequent column drying, but NW flow in the wake of this front will promote at least a period of upslope enhancement to slow the drying enough for a few inches of snow in these higher elevations. WPC probabilities have been consistent the past few runs, and continue to suggest a 10-30% chance for at least 4 inches of snow in the higher terrain from northern Upstate NY through VT, NH, and western ME. The probability for significant freezing rain exceeding 0.1 inches across the CONUS is less than 10 percent. Weiss $$ = = = 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]