Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 PM EST Mon Feb 15 2021 Valid 00Z Tue Feb 16 2021 - 00Z Thu Feb 18 2021 ...Millions of Americans are currently under Winter Storm Warnings, Ice Storm Warnings, Winter Storm Watches, or Winter Weather Advisories as impactful winter weather continues from coast-to-coast... ...Major winter storm to spread heavy snow and significant ice accumulations from Tennessee/Ohio Valleys to the Northeast... ...Frigid Arctic air and dangerously cold wind chills to persist in the Great Plains and Mississippi Valley through midweek... ...Severe thunderstorms, heavy rain, and warm temperatures are expected for southern Georgia and Florida... An active weather pattern will continue the unprecedented winter weather across parts of the southern CONUS. A major winter storm will spread heavy snow across parts of the Midwest and interior Northeast tonight before receding into the Northeast on Tuesday. A wide swath of 4-8 inches of snow will fall from the Ohio Valley to Maine while some isolated areas, particularly points downwind of Lakes Eerie and Ontario, may get up to a foot of snow by Wednesday. Freezing rain will be a concern for parts of the Ohio Valley through parts of the coastal Northeast. An area of 0.1 inches of ice may accumulate from central Pennsylvania up to southern New England and eastern Maine. Heavy rain is expected to spread across the eastern seaboard through tomorrow afternoon. Rainfall totals around an inch are possible across the Carolina Piedmont and Northeast. Troughing in the west will lead to significant snowfall over the mountains of the Pacific Northwest and Northern Rockies. Between 1-2 feet of snow is likely to fall over this area with the highest peaks likely to receive 2-4 feet of snow through Wednesday. Another system, currently in the Rockies, will move into the Southern Plains tomorrow. This system will spread heavy snow from the Rockies today into the Southern Plains and Lower Mississippi Valley on Tuesday and Wednesday. Freezing rain will impact a swath of land extending from eastern Texas to southwestern Tennessee late Tuesday. Snow totals for the Central/Southern Rockies may range between 8-12 inches with 1-2 feet possible over the highest peaks through Tuesday. Between 4-8 inches of snow are likely to fall over much of Oklahoma, Arkansas and southern Missouri starting Tuesday night and extending through Wednesday. Kebede Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php