FOUS11 KWBC 211915

QPFHSD



Probabilistic Heavy Snow and Icing Discussion

NWS Weather Prediction Center College Park MD

315 PM EDT Sat Mar 21 2026



Valid 00Z Sun Mar 22 2026 - 00Z Wed Mar 25 2026



...Northeast... 

Days 1-2...



A clipper system will track across the Northeast late today through

Sunday with snow spreading into northern New York this evening and

northern New England overnight. While warm advection will be a

principle driver for the developing precipitation, it combined with

the high angle will support a changeover to rain across much of 

Upstate New York and southern New England on Sunday. In contrast, 

the higher elevations of the Adirondacks and much of northern New 

England are expected to remain cold enough for snow to remain the 

primary precipitation type before the system exits Sunday night.



Terrain-enchanced lifting along with cooler temperatures will

support heavier snow totals across portions of the Adirondacks, 

Green, and White mountains -- with several inches likely, as 

indicated by the greater than 50 percent WPC probabilities for 

accumulations over 8 inches. 



While lesser amounts are more likely across the lower elevations, 

guidance indicates that low-to-mid level frontogenesis may help 

contribute to banded heavier snowfall rates (0.5-1 in/hr) that may 

be sufficient enough to support a swath of heavier totals from 

east of the western Maine mountains to Down East Maine on Sunday. 

Higher probabilities for amounts over 4 inches have expanded across

this area and are now greater than 70 percent across a broader 

area. Additionally, probabilities for totals over 8 inches have 

increased in this area also, with some greater than 50 percent 

probabilities near the Maine coast. 



Pereira



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