Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 PM EST Sat Feb 06 2021 Valid 00Z Sun Feb 07 2021 - 00Z Tue Feb 09 2021 ...Southern storm system tracking up the East Coast on Sunday to bring heavy snow to the Northeast... ...Wintry weather to persist in the Northern Rockies and Northern Plains... ...Prolonged period of life-threatening wind chills to impact the Northern Plains and Upper Midwest... An upper level disturbance tracking through the South Central U.S. this afternoon is aiding in the development of low pressure along the Gulf Coast. Widespread showers have formed throughout the Southeast and will track northeast through the evening hours. Some thunderstorms could become severe over Florida this afternoon and evening, which has led to the issuance of a Slight Risk today. Additionally, Winter Weather Advisories are in place for parts of the Midwest through this evening as several inches of snow are possible. Overnight, the wave of low pressure will strengthen along the Southeast coast with periods of snow breaking out across the southern Appalachians and southern Mid-Atlantic. By early Sunday morning, the storm is expected to be somewhere near the North Carolina Outer Banks and its accompanying shield of snowfall will be positioned over the northern Mid-Atlantic. Snow may be falling heavily at times along the I-95 corridor from Richmond and Washington D.C. to Philadelphia Sunday morning. Farther south, scattered showers and thunderstorms are possible in central Florida as a cold front passes through the state. The storm will race north and east bringing accumulating snowfall to the NYC metro area and southern New England by midday and continuing into the afternoon hours. Snow will exit out to sea by evening with below normal temperatures surging in behind the departing winter storm on Monday. Snowfall accumulations are forecast to range between 4 to 8 inches on average up and down the I-95 megalopolis from Washington D.C. to Boston with the highest amounts most likely to occur in southern New England. Expect hazardous travel conditions on Sunday with re-freezing of snow and ice on untreated roads and surfaces Monday morning. To the west, waves of low pressure will continue to ride along a quasi-stationary frontal boundary that stretches from the Northwest to the central High Plains. This is resulting in a prolonged period of snowfall in parts of the Cascades, the northern Rockies, and northern High Plains. Winter Storm Warnings have been issued for much of Montana that last into Sunday afternoon. Moderate-to-heavy snowfall is also expected to continue in the Bitterroots and Tetons into Monday morning. Snowfall accumulations through Monday evening range between 1 to 2 feet in the higher elevations of the northern Rockies with over a foot of snow also possible in the Colorado Rockies. Another round of snowfall is likely to occur in parts of the Midwest on Monday as a new area of low pressure develops in the south-central Plains. The North Central U.S. is forecast to remain stuck under a dome of frigid temperatures that encompasses a large area from Montana to the western Great Lakes. Daily minimum temperatures both Sunday and Monday are likely to be -10 to as low -20 degrees. High temperatures will also struggle to get above zero in parts of the Northern Plains and Upper Midwest. Wind Chills will be dangerously cold throughout much of the North Central U.S. with Wind Chill Warnings and Advisories in place through Monday. Wind Chills, particularly in northern North Dakota and Minnesota, could be as low as -50 degrees. Unfortunately, Old Man Winter shows no sign of loosening his grip over the region as much below normal temperatures look to continue into the middle of the upcoming week. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php