Winter Weather — Northwest Suffolk, New York

2025-12-26 to 2025-12-27 · Northwest Suffolk, New York

Event narrative

Trained spotters reported 5.8 inches in Stony Brook and 4.5 inches at 1 SW Mount Sinai. Broadcast Media reported 4.5 inches at 1 ENE Commack. NWS Employees reported 5.1 inches at 1 NE Lake Ronkonkoma, 5.2 inches at 1 WSW Poquott, and 4.6 inches at 1 SW Sunken Meadow Park. The public reported 5.2 inches at 2 S Commack, 5.0 inches at 1 SE East Northport, and 4.4 inches at 1 S Nesconset. Cocorahs reported 5.5 inches at 2.1 W Setauket-East Setauket. Overall, high end advisory criteria was reported average wise and spatially across the zone, falling just short of warning criteria.

Wider weather episode

A progressive shortwave from the west overran a cold high pressure system resulting in a significant snowfall across the region. Warm advection aloft was the main driver of the snowfall for much of the event. Advisory to Warning level snow fell across Southeastern New York.

Source: NOAA Storm Events Database, event_id 1299834. Narrative written by the NWS forecast office that issued the report.