Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 AM EST Mon Dec 30 2019 Valid 12Z Mon Dec 30 2019 - 12Z Wed Jan 01 2020 ...Major winter storm to bring significant snow and ice to portions of the Upper Midwest and Northeast... ...Rain and mountain snows return to the Northwest by Tuesday... The ongoing major winter storm across the north-central U.S. will continue to bring heavy snow to portions of the Upper Midwest and Great Lakes through Monday. Additional snow accumulations of 6 to 12 inches, with locally higher amounts, are possible. Gusty winds will create blowing and drifting snow and dangerous travel conditions. Heavy snow and icing are also expected across portions of the Northeast and New England through Tuesday as moisture from this system surges northward and a surface low intensifies off the coast. As much as a quarter of an inch of ice is possible in some of the higher terrain of eastern New York, Vermont, and western Massachusetts where ice storm and winter storm warnings are currently in effect. Heavy snow is also expected across portions of Upstate New York to northern New England with accumulations of 6 to 8+ inches possible. Elsewhere, a storm system moving towards the Pacific Northwest will bring widespread rain and mountain snows to much of the Northwest beginning on Tuesday and lasting into the New Year. Heavy snowfall, in excess of a foot, is possible in the highest terrain of the Washington Cascades, and the Northern Rockies. In terms of temperatures across the nation, well above normal conditions will continue through Monday across the Ohio Valley and Mid-Atlantic, moderating back towards normal (though maybe still slightly above) by Tuesday following the passage of the cold front. In the West, temperatures are expected to be 10 to 20 degrees below normal from the Desert Southwest to the Central Rockies. The west coast will trend warmer through the short range ahead of the approaching cold front. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php