Mesoscale Discussion 0055 NWS Storm Prediction Center Norman OK 1223 AM CST Tue Jan 28 2025 Areas affected...North and western New York Concerning...Snow Squall Valid 280623Z - 281130Z SUMMARY...Brief, but intense, snow showers along a strong cold front will move into northern and western New York through the overnight hours. Ahead of the front, heavy snowfall rates up to 1-2 inches/hour are possible along the northeastern shores of the Lower Great Lakes. DISCUSSION...A strong cold front, evident by a pronounced leading band of heavy snow showers, has been pushing southeast out of Ontario/Quebec over the past several hours. Higher reflectivity values (up to 30 dBz) and occasional lightning flashes have been noted along portions of the front, indicative of the deep convective nature of the snow bands. Wind gusts upwards of 20-25 mph have also been noted with the passage of the front across Ontario/Quebec, as well as occasional visibility reductions. Similar conditions are possible as the snow bands cross the Lower Great Lakes and move into northern and western NY. A combination of rapidly falling temperatures along/behind the front, bursts of heavy snow within the stronger bands, and winds gusting up to 25 mph will support snow squall conditions across northern/western NY, and possibly into central NY, over the next several hours. Prior to the passage of the front, southwesterly winds oriented along Lake Erie and Lake Ontario will continue to support moderate to heavy lake effect snow bands on the northeastern shores of both lakes. Recent surface observations have reported visibility reductions between 1/4 to 3/4 of a mile. Despite 20-30 mph winds, blowing snow model output suggests that these visibility reductions are attributable to moderate to heavy snowfall rates. Recent guidance supports this idea and hints that rates up to 1-2 inches/hour are possible prior to the passage of the front. ..Moore.. 01/28/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BTV...ALY...BGM...BUF...CTP...CLE... LAT...LON 42287757 42067847 41987899 41977948 42047976 42197993 42337993 42407972 42617936 42877914 43097911 43237913 43387891 43517827 43417754 43457705 43567674 43827654 44107653 44357633 44807553 45007507 45067476 45077399 45067354 45037338 44897327 44657319 44427333 44217352 43997380 43697430 42337741 42287757
Storm Prediction Center Mesoscale Discussion 55

28
Jan