Lake effect snow has taken over as the primary weather driver across western and central New York this Thursday morning, with multiple warnings in effect and forecasters calling for dangerous travel at times through Friday. Much colder air moved in overnight behind a departing clipper system, setting up ideal conditions for strong, persistent lake effect bands southeast of both Lake Erie and Lake Ontario.
Temperatures will struggle to escape the 20s today, and wind gusts of 30 to 40 mph will create blowing and drifting snow, especially in open areas. Snowfall rates of 1 to 2 inches per hour are expected in the most intense bands.
Active warnings and advisories: Heavy lake effect bands take shape
Lake Effect Snow Warnings are in effect for:
- Wayne and Northern Cayuga counties (through 7 a.m. Friday)
- Onondaga, Madison and Southern Oneida counties (through 7 a.m. Friday)
- Chautauqua, Cattaraugus and Southern Erie counties (through 4 a.m. Friday)
- Warren and McKean counties in Pennsylvania (through 4 a.m. Friday)
Heaviest snow is expected in these areas, with additional accumulations of 6 to 12 inches depending on band placement and duration. Winds gusting up to 40 mph will cause significant visibility reductions.
Winter Storm Warnings remain in effect until early afternoon for:
- Jefferson, Lewis and Oswego counties east of Lake Ontario
- Northern Oneida County
These areas will see another round of widespread light snow this morning before localized lake effect becomes the dominant hazard.
Winter Weather Advisories cover:
- Monroe, Wyoming, Allegany and Southern Herkimer counties
- Additional advisory zones across Pennsylvania’s northern tier and the southern Adirondacks
These regions can expect 2 to 6 inches of snowfall within narrow bands, with rapidly changing road conditions.
Off Lake Ontario: Intense band targets Wayne, Cayuga and the Syracuse corridor
A strong connection to Georgian Bay is driving a potent snow band that has already crossed Rochester early this morning and is now focusing east of the city.
The band is expected to settle from eastern Wayne County through northern Cayuga County and into the Syracuse metro, oscillating north and south during the day. Forecast highlights include:
- 7 to 10 inches likely in far eastern Wayne and northern Cayuga counties
- 6 to 12 inches across Onondaga, Madison and Southern Oneida counties
- Snowfall rates up to 2 inches per hour
- Blowing snow from winds gusting up to 40 mph
The morning commute in the Syracuse area is expected to be severely impacted. The band will continue into tonight with steady accumulations until moisture begins to decrease after midnight.
Off Lake Erie: Heavy snow in the Southern Tier and southern Erie County
A meandering band enhanced by a Lake Huron connection will repeatedly pivot across the western Southern Tier and far southern Erie County, producing:
- 7 to 10 additional inches in Chautauqua, Cattaraugus and southern Erie counties
- Strong gusts producing blowing and drifting snow
- Rapid visibility changes on higher terrain, including the Chautauqua Ridge and hilltops south of Buffalo
This activity weakens late tonight as inversion heights fall and the deepest moisture shifts east.
Central NY and Southern Tier: Snow squalls possible outside main bands
While the lake effect bands will be the main focus, forecasters warn that scattered snow showers and brief snow squalls are possible as far south as northeast Pennsylvania this afternoon. These squalls could bring:
- Quick, sharp drops in visibility
- A fast coating of snow on untreated roads
- Sudden travel hazards despite low total accumulations
Temperatures will remain cold and winds strong, keeping wind chills in the teens throughout the day.
Friday: Lake effect slowly weakens but lingers east of Lake Ontario
Lake effect off Lake Erie will diminish Friday morning, but Lake Ontario’s band will reorganize and reintensify as winds align from the west. This will shift the band north through:
- Northeastern Wayne County
- Northern Cayuga County
- Southern, then central and northern Oswego County
Localized 3 to 6 inches are possible Friday morning into early afternoon in these areas before the band lifts toward Jefferson County and weakens Friday night.
Weekend outlook: Another cold shot, another round of snow
A new clipper system moves through on Saturday, delivering:
- A burst of synoptic snow with 1–3 inches regionwide
- Renewed lake enhancement northeast of Lake Erie in the morning
- Renewed lake effect east of Lake Ontario Saturday night into Sunday
By Sunday, a deep cold upper-level low arrives, dropping 850 mb temperatures to around -17°C. This supports another significant lake effect event east of Lake Ontario, likely impacting the Tug Hill with heavy accumulations. Winds will veer northwest by Sunday afternoon, scattering bands and transitioning to lighter, widespread snow showers.
Temperatures will remain well below normal, with highs in the 20s and lows in the single digits and teens.
Travel outlook: Slow, changing, and hazardous
Through Friday morning, those traveling across western, central and northern New York should expect:
- Whiteout conditions in heavy bands
- Snow-covered roads and drifting on open stretches
- Rapid shifts from clear weather to heavy snow within a mile
- Difficult commutes in the Syracuse area, northern Cayuga and Wayne counties, the Tug Hill region, and the western Southern Tier
Officials urge motorists to keep emergency supplies in their vehicles and check 511 for road conditions before heading out.
More lake effect snow, more reinforcing cold, and more travel disruptions are likely into early next week as the active winter pattern continues.
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