“Bitter cold.” An arctic air mass will remain over the Central U.S. this week with frigid temperatures and dangerous wind chills,

warns the National Weather Service. “This air mass will gradually expand into the Gulf Coast states and Northwest U.S. by late this week. A significant ice and snow event could develop by midweek from the southern Plains into the Mississippi and Ohio Valleys to the East Coast impacting travel and commerce.”

As low as -50 degrees

Bitter cold and dangerous wind chills to persist across the north-central United States.

Two rounds of light snowfall and freezing rain to impact areas from the Central/Southern Plains to Northeast. Residents across the Northern Plains and Upper Midwest will start off the work week with continued below average temperatures and brutal wind chills.

Wind Chill Advisories and Warnings remain in effect from Montana to the U.P. of Michigan. Wind chill values well below zero and as low as -50 degrees could be experienced at times across this region.

While not as extreme, this cold airmass stretches as far south as Oklahoma and as far east as the Ohio Valley. Widespread temperatures 20 to 30 degrees below average can found across these areas. Unfortunately, these below average temperatures don’t appear to moderate or exit in the foreseeable future.

Looking for some mid-winter warmth? Much of the Southeast and south-central U.S. will enjoy above average temperatures through Wednesday. With cold air in place across the northern U.S. and a stalled frontal boundary bisecting the middle of the country, multiple rounds of wintry precipitation are expected from the Southern/Central Plains to the Northeast.

Starting today, light snowfall is expected to continue across the Northern Rockies and add to the recent fresh snowpack that has accumulated over the last several days.

Winter Weather Advisories and Avalanche Warnings are in effect across much of the mountainous terrain in Montana and northern Idaho. Light snow will also be found across the Central Plains and Midwest today. Generally around 2 to 4 inches of snow can be expected for these locations, with higher amounts up to 6 inches possible across the Northeast.

A mix of sleet, snow, and freezing rain will be possible across northeast Oklahoma and southern Missouri through tonight as well. By Wednesday morning another round of wintry weather is expected to develop across similar regions from the southern Plains to Midwest. More impactful freezing rain accretion will be possible and this time stretch from northeast Oklahoma to northern Kentucky.

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

The post Frigid Arctic Airmass; Developing Ice and Snow by Mid-Week appeared first on Ice Age Now.

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February 8, 2021 at 11:53AM