Temperatures projected to rise and then plunge to sub-zero windchills by Christmas Eve day

BREAKING: New weather forecasts are showing a roller coaster temperatures ride into Christmas weekend, rising to near 50 degrees actual temperatures in Central Allegany County, NY, early Friday morning before plunging to sub-zero windchills all day Christmas Eve. The Lake Effect Snow Warning, originally scheduled to end early this afternoon for Cattaraugus and Wyoming counties west, has been cancelled.

At the same time, the US National Weather Service Buffalo NY, in combination with the NOAA NWS Weather Prediction Center (WPC) at College Park, Md., are showing increasing chances for a new weather system bringing a warmup and widespread rain Thursday and Thursday night, followed by much colder conditions and a changeover back to snow Friday, combined with potentially strong winds Friday night and Saturday.

The strong winds will provide a significant gap between actual and wind chill temperatures throughout the period.

The WPC video accompanying this story shows the quickly changing dynamics of a frigid Arctic air mass plunging southward from Canada to much of the United States throughout this week and then moving northeast.

Projections as to how cold Christmas Day temperatures might be are expected this afternoon.

Readers can stop the video on any day for closer inspection by clicking on the center of the screen.

Local weather forecasts for specific areas throughout the country are accessible through the Search feature in the upper left corner of most NWS pages, with Hourly Weather Forecasts, which project times, temperatures and precipitation throughout each day, being found on the lower right side of local pages.

Be Aware. Be Prepared. Stay Safe.TM by being alert to cold weather precautions at https://bit.ly/3zJxVUk for oneself, family members and vulnerable populations.

Various components of the forecasts are available through the following resources:

— Overall weather descriptions at www.weather.gov/buf for the NWS Buffalo forecast region, www.weather.gov/bgm for Steuben and counties to the east, and www.weather.gov/ctp for adjoining Pennsylvania counties.

— Separate snow and ice forecasts for Allegany County and the rest of Western New York are available at https://bit.ly/3CUmLMq, for Steuben County east at https://bit.ly/312qR7E, and Pennsylvania counties to the south at https://bit.ly/3rcTH0o.

— Progression of storms can be tracked interactively via a zoomable NWS Doppler radar site at https://bit.ly/3xyTULH.

— Previews and maps of weather components over the next seven days are available at https://bit.ly/3CUmLMq, with Steuben County east at https://bit.ly/312qR7E, and Pennsylvania counties to the south at https://bit.ly/3rcTH0o.
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