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Mary Beth's Forecast: Icy roads and sidewalks tonight with colder air arriving

A Winter Storm WATCH is in effect for parts of WNY starting late Sunday night
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Winter Storm Watch in effect late Sunday night through Wednesday morning for Southern Erie, Wyoming, Chautauqua, and Cattaraugus Counties

Winter Storm Watch for Northern Erie and Genesee Counties from Monday morning through Tuesday night. Lake snow will impact the Buffalo southtowns and southern Genesee County, especially.

Untreated roads and sidewalks will turn icy and hazardous tonight with colder air arriving. Snow showers will be winding down this evening with scattered flurries overnight. Turning colder tonight with overnight lows in the upper teens.

Expect falling temperatures on Sunday. Heavy lake-effect snow is possible starting late Sunday night especially south of Buffalo along with dangerously cold wind chills. There's a lot of uncertainty on where the band will set up, so be prepared for difficult travel early next week. An arctic airmass will bring the coldest air in almost six years to the region. Wind chills will be -15 to -30 degrees.

SATURDAY
EVENING: Snow to flurries, colder, low 20s.

SUNDAY
MORNING: Flurries, near 20.
AFTERNOON: Few snow showers, upper teens.

MONDAY
MORNING: Lake snow south, low teens.
AFTERNOON: Lake snow south, mid-teens.

TUESDAY
MORNING: Lake snow, bitter cold, single digits.
AFTERNOON: Lake snow, bitter cold, low teens.

WEDNESDAY
MORNING: Lake snow, bitter cold, single digits.
AFTERNOON: Snow showers, bitter cold, near 10.