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More than 100 million Americans currently under winter-related watches, warnings, or advisories. Brace for record cold, significant snow accumulations, icy roads, treacherous travel, blizzard conditions as far south as Dallas and beyond. Power outages.

Heavy snow is falling across the mountains and lowlands of Washington and Oregon today with significant icing in northwest Oregon, according to the National Weather Service. Significant icing will also occur over Virginia and southern Maryland into Sunday. A major winter storm is expected to develop over the Southern U.S. Sunday lifting into the Northeast through Tuesday with a large area of snow, sleet, and freezing rain expected.

  • More than 100 million Americans are currently under winter-related watches, warnings, or advisories as extensive impacts transpire from coast-to-coast this weekend.
  • Icy weather and slick travel conditions in the Mid-Atlantic later today.
  • Major winter storm to blanket the West and Plains in heavy snow and significant ice accumulations.
  • Frigid Arctic air and dangerously cold wind chills to persist in the Heartland.

Bitter cold combined with an active storm track emerging out of the Pacific and Gulf of Mexico will lead to a myriad of winter weather hazards across the continental U.S. this weekend.

Starting in the East, areas of low pressure riding along a quasi-stationary boundary off the Southeast coast induce showers and thunderstorms from the Carolinas to Florida. Flash Flood Watches are in effect for parts of the Florida Panhandle and both southern Georgia and Alabama this weekend where over 2″ of rainfall is expected.

Downed tree limbs and power outages expected

Farther north, Winter Weather Advisories extend from northern North Carolina to the Delaware Valley where ice accumulations as high as a quarter inch are possible into Saturday evening. The worst impacts are likely in central Virginia where Ice Storm Warnings and Winter Storm Warnings are in effect through Saturday night. Up to a half inch of ice is possible in these areas. Downed tree limbs and power outages are expected. Hazardous travel conditions will be common throughout these areas of the Mid-Atlantic Saturday night and into Sunday morning.

In the West, a major winter storm is unfolding as Pacific moisture clashes with very cold temperatures from the Pacific Northwest to the Intermountain West. Significant snow accumulations are expected in western Washington and Oregon with dangerously icy conditions possible in the Willamette Valley into midday Saturday. Heavy mountain snow is anticipated in higher elevations of the West on Saturday, including portions of the Great Basin and some lower lying valleys as well.

As much as a foot of snow in parts of Oklahoma and the Texas Panhandle

By Sunday, a deepening upper trough over the Four Corners region and well below normal temperatures entrenched throughout the Plains foster an environment favorable for disruptive snow and ice accumulations in the South-Central region. The central and southern Plains can expect a snowy Sunday with blustery winds causing whiteout conditions and high snow drifts. The latest forecast through Sunday night calls for as much as a foot of snow in parts of Oklahoma and the Texas Panhandle.

By Sunday night, an icy wintry mix is forecast to set up from southern and eastern Texas to the Lower Mississippi Valley. Travel conditions Sunday night into
Monday morning in these areas will be treacherous with some roads becoming impossible to travel on safely. Look for moderate-to-heavy snow to develop
over the lower Great Lakes and into the northern Mid-Atlantic by Monday morning. Winter Storm Watches have been posted for parts of the Ohio and
Tennessee Valleys in response to the growing threat for heavy snowfall and dangerous ice accumulations.

Numerous record lows likely from the Northwest to the Plains

On top of all the disruptive wintry weather and precarious travel conditions, teeth-chattering cold continues across the Nation’s Heartland this weekend and into the first half of the upcoming week. Numerous daily record low max temps are likely to be broken from the Northwest to the Plains. High temperatures are forecast to be in the single digits in the Central Plains and Midwest today, then struggle to get above zero on Sunday. Actual low temperatures in the northern Rockies and Plains are
forecast to be as cold as -30 degrees. Add in gusty winds and the result is life-threatening wind chills between -30 to -60 in the North-Central U.S. Wind Chill Advisories extend as far south as the Southern Plains and look to persist into the start of the work-week.

https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=pmdspd

The post Major Winter Storms to Blanket the West and Plains in Heavy Snow and Ice – Icy Weather in the Mid-Atlantic appeared first on Ice Age Now.

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February 13, 2021 at 11:51AM