UPDATE, 4:30 p.m.: The National Weather Service has issued wind chill advisories for tonight across the region.

Later Sunday, winter storm warnings take effect across the region.

Wind chill advisories will be in effect from 6 tonight to 7 a.m. Sunday for Genesee, Livingston, Orleans and Wyoming counties, and also for Monroe, Niagara, Chautauqua, Cattaraugus, northern and southern Erie, Ontario, Allegany and Wayne counties.

Very cold wind chills are expected again tonight, with wind chills as low as 15 degrees below zero.

Wind chills for Livingston, Ontario and Allegany counties may be as low as 20 degree below zero.

A winter storm warning will be in effect from 7 p.m. Sunday to 10 p.m. Monday for Wyoming, Chautauqua, Cattaraugus and southern Erie counties. The Weather Service says 12 to 20 inches of snow is expected, with winds gusting as high as 40 mph on Monday.

A winter storm warning is in effect from 7 p.m. Sunday to 7 p.m. Monday for Livingston, Ontario and Allegany counties. Total snow accumulations of 7 to 13 inches are forecast, with winds gusting as high as 35 mph on Monday, the Weather Service said.

A winter storm warning will be in effect from 9 p.m. Sunday to 7 p.m. Monday for Genesee, Orleans, Niagara and northern Erie counties, with 12 to 19 inches of total snow accumulation expected. Winds may gust as high as 40 mph on Monday.

Widespread accumulating snow will create dangerous travel conditions.

Travel could be very difficult to impossible. The hazardous conditions could affect the morning or evening commute. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency.

The cold wind chills could result in hypothermia if precautions are not taken.

This is a potentially dangerous situation to be outdoors. If you must be outside, be sure to cover all exposed skin. Frostbite can occur in 30 minutes or less with apparent temperatures of 15 below zero or colder.

A winter storm warning will also be in effect from 5 p.m. Sunday to 5 p.m. Monday for Steuben and Yates counties. Total snow accumulations of 9 to 12 inches are expected with winds gusting as high as 40 mph.

Snowfall rates early Monday morning could reach up to 1 inch per hour at times.

Monroe and Wayne counties will be under a winter storm warning from 9 p.m. Sunday to 7 p.m. Sunday with total snow accumulations of 9 to 17 inches and winds gusting as high as 40 mph.

Original story, 10 a.m.:

While most of Sunday is expected to see uneventful weather across the region, a major winter storm tracking north from the Carolinas is expected to bring steady - occasionally heavy - snow across the region Sunday night and Monday, according to the National Weather Service.

Snowfall amounts of more than a foot are anticipated in the western counties, the Weather Service said.

Winter storm warnings begin Sunday across Western New York, with the duration and snowfall totals varying by location.

Wind chill advisories also remain in effect until 1 p.m. across the region. Tonight, wind chill values will approach advisory criteria - which is 15 degrees below zero - the decreased wind speeds may mean wind chill values do not meet the criteria, the Weather Service said in a forecast discussion this morning, though advisories could be issued later if conditions change as temperatures are expected to drop to between zero and 5 below.

“Sunday will truly be the ‘calm before the storm,’ “ the forecast discussion said.

The winter storm warnings begin first - and last the longest - for Wyoming, Chautauqua, Cattaraugus and southern Erie counties where the National Weather Service says total snow accumulations of 12 to 18 inches is possible.

The snow will be accompanied by winds gusting as high as 40 mph, the Weather Service said.

The warning begins at 7 p.m. Sunday and will be in effect until 10 p.m. Monday.

A winter storm warning will be in effect from 9 p.m. Sunday to 7 p.m. Monday for Genesee, Orleans, Niagara and northern Erie counties.

Heavy snow is expected, with total snow accumulations of 12 to 18 inches. Winds may gusts as high as 40 mph, the Weather Service said.

Widespread accumulating snow will create dangerous travel conditions. Travel could be very difficult to impossible Sunday night through Monday evening. The hazardous conditions will definitely affect the Monday morning and evening commutes.

A wind chill advisory for those areas remains in effect until 1 p.m. this afternoon. Winds chills as low as 15 degree below zero are possible, according to the Weather Service.

The cold wind chills could result in hypothermia if precautions are not taken. If you must be outside, be sure to cover all exposed skin. Frostbite can occur in 30 minutes or less with apparent temperatures of 15 below zero or colder.

A winter storm warning will be in effect from 7 p.m. Sunday to 7 p.m. Monday for Livingston, Ontario and Allegany counties. Total snow accumulations of 8 to 14 inches is forecast, with winds gusting as high as 35 mph.

Travel could be very difficult to impossible Sunday night through at least Monday. The hazardous conditions will definitely affect the Monday morning and evening commutes.

A wind chill advisory is in effect until 1 p.m. this afternoon, with wind chills as low as 20 degrees below zero. This is a potentially dangerous situation to be outdoors. If you must be outside, be sure to cover all exposed skin. Frostbite can occur in 30 minutes or less with apparent temperatures of 15 below zero or colder.

Among other nearby counties:

n A winter storm warning will be in effect from 9 p.m. Sunday to 7 p.m. Monday for Monroe and Wayne counties. Total snow accumulations of 8 to 14 inches are possible, with winds gusting as high as 40 mph. A wind chill advisory is in effect until 1 p.m. this afternoon, with wind chills as low as 15 degrees below zero possible.

n A winter storm watch is in effect from Sunday afternoon through Monday afternoon for Steuben, Tompkins, Chemung, Schuyler, Tioga, Yates, Seneca and southern Cayuga counties. Total snow accumulations of 7 inches are more is possible. A wind chill advisory is in effect until 1 p.m. this afternoon, with wind chills as low as 24 degrees below zero possible.

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