FOUS11 KWBC 191903

QPFHSD



Probabilistic Heavy Snow and Icing Discussion

NWS Weather Prediction Center College Park MD

303 PM EDT Thu Mar 19 2026



Valid 00Z Fri Mar 20 2026 - 00Z Mon Mar 23 2026



...Upper Great Lakes to the Northeast... 

Days 1-3...



Ridge/trough upper pattern over the CONUS will continue to bring 

northern stream systems through the Great Lakes into the Northeast 

with minor to occasionally modest snowfall. A system over southern 

Canada this evening will push through the Great Lakes tonight and 

into southern/southeastern Ontario tomorrow. WAA-driven snow and 

some light icing is likely over the U.P. of Michigan and into 

northern Lower Michigan. As the clipper moves into the Northeast 

tomorrow afternoon/evening, snow will fall mostly over the higher 

elevations (above 1500ft or so) where WPC probabilities for at 

least 4" are >50%, with lesser accumulations to the valley floors 

(T-2"). Precipitation should end on Saturday morning. 



The next system will slip into northern MN and the western Great 

Lakes Saturday afternoon/evening. With a southwest-to-northeast 

thermal gradient, some icing is possible once again over 

northeastern MN, northern WI, and northern Lower Michigan near the 

surface warm front. That system may track a bit farther south, 

which could bring in at least some light to modest snow to 

northeastern MN into the U.P. of Michigan. There, WPC probabilities

for at least 4 inches of snow are >40% Saturday into very early 

Sunday. The system will race eastward and bring another swath of 

snow to northern NYS into New England Sunday. Through 00Z/Mon, WPC 

probabilities for an additional 4 inches of snow are >30% over the 

higher elevations of the northern Adirondacks into the Green/White 

Mountains, but the snow will continue beyond this forecast range. 





The chances for significant icing across the CONUS is less than 10

percent. 



Fracasso



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