A strengthening area of low pressure moving southeast across Ontario approached the St. Lawrence Valley during the early morning of Thursday, the 5th.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BGM wrote it up.
A strengthening area of low pressure moving southeast across Ontario approached the St. Lawrence Valley during the early morning of Thursday, the 5th. Ahead of this surface low, a strong push of warmer air led to snow showers developing during the afternoon and evening of Wednesday, the 4th, with upslope flow enhancing snow showers near the Tug Hill Plateau. As the surface low and strong supporting upper trough approached the area late Wednesday night, snow showers increased in coverage. As the cold front with this system then moved through prior to daybreak Thursday, locally heavy snow showers and snow squalls crossed the area from west to east. Northwesterly winds that developed in the wake of the front led to the development of lake effect snow showers which tapered off later Thursday night. Strong, gusty winds were in place through Thursday evening, leading to localized areas of blowing snow and reduced visibility.
The national radar mosaic for the moment the first event began.
4 heavy snow, 2 winter weather. Local standard time, as filed.
Snow accumulated between 6 and 14 inches.
Snow accumulated between 2 and 7 inches.
Snow accumulated between 4 and 9 inches.
Snow accumulated between 4 and 9 inches.
Snow accumulated between 4 and 10 inches.
Snow accumulated between 3 and 7 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2024Every state in 2024This day in weather historyWarnings in New York, December 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1225476, 1226775, 1225474, 1225475, 1225477, 1226774.