Get ready for a one-two punch of winter.
A sub arctic airmass will settle southwards across our region, bringing dangerously low wind chill values tonight into Saturday morning, according to the National Weather Service, which has issued wind chill advisories across upstate New York.
That will be followed Sunday night and Monday by a major winter storm that is expected to bring widespread significant snowfall to the region, the Weather Service said in a forecast discussion this morning.
Temperatures across the region are already beginning to fall after reaching daybreak highs in lower 30s. Readings this morning will generally settle into the low to mid 20s, the forecast discussion said, but by late afternoon temps will have dropped to the teens.
A wind chill advisory begins at 6 tonight and remains in effect through 1 p.m. Saturday for Genesee, Livingston, Orleans and Wyoming counties. The advisory also includes Erie, Niagara, Monroe, Ontario, Chautauqua, Cattaraugus, Allegany, Wayne and northern Cayuga.
Those counties are also under a winter storm watch that will be in effect from Sunday evening through Monday afternoon.
For the wind chill advisory, very cold wind chills are expected. Wind chills as low as 20 below zero are expected, the Weather Service said.
In addition to the bitterly cold wind chills overnight, temperatures on Saturday are expected to stay in the single digits above zero and then quickly fall back below zero overnight Sunday night, the Weather Service said.
The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes.
This is a potentially dangerous situation to be outdoors. If you must be outside, be sure to cover all exposed skin.
For the winter storm watch, heavy snow is possible with total snow accumulations of 9 inches or more. Winds could gust as high as 35 mph, the Weather Service said.
Travel could be very difficult to impossible. The hazardous conditions could affect the morning or evening commute.
Begin needed preparations at home or with your vehicle. Travel may become difficult, so plan accordingly.
Steuben County also finds itself under a wind chill advisory from 7 p.m. Friday to 1 p.m. Saturday. The county will be under a winter storm watch from Sunday afternoon through Monday afternoon.
The advisories also include Yates, Seneca, southern Cayuga, Schuyler, Chemung, Tompkins, Tioga and Broom counties in New York.
For the wind chill advisory, very cold wind chills are expected. Wind chills as low as 20 below zero are possible, the Weather Service said.
For the winter storm watch, heavy snow is possible. Total snow accumulations of 7 inches or more are forecast. Winds could gust as high as 35 mph, the Weather Service said.
Travel could be very difficult. The hazardous conditions could affect the morning or evening commute.