Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 259 PM EST Mon Jan 20 2020 Valid 00Z Tue Jan 21 2020 - 00Z Thu Jan 23 2020 ...Eastern regions to stay bundled up as abnormally cold temperatures persist through Wednesday... ...Rain and higher elevation snow from the Pacific Northwest to the Rockies... ...Showers and wintry precipitation to develop over the Heartland Wednesday... Winter will maintain a tight grip over the central and eastern U.S. this evening and into Tuesday. Parts of the Midwest, most notably eastern Nebraska and Iowa, can expect temperatures to fall below zero Tuesday morning. Further east, most locations will see daily temperature anomalies range between 10 and 20 degrees below normal. Freeze warnings have been issued for parts of north-central Florida and southern Georgia where temperatures are forecast to dip below freezing Tuesday morning. By Wednesday, milder temperatures will return to the Plains while the East Coast and Deep South see one more day of abnormally colder conditions. Milder temperatures work their way to the East Coast the second half of the week. As spotty showers track through portions of the West Coast this afternoon, a potent storm system will head for the Pacific Northwest leading to an increase in precipitation coverage tonight and into Tuesday. In the lower elevations and along the coast, periods of rain will be common from northern California to western Washington. In the higher elevations, snow will blanket the mountain ranges of the Northwest with the heaviest totals expected to be in the Cascades where snow totals exceeding a foot are likely. Further south, an influx of moisture will track across the Southwest tonight and Tuesday leading to light rain and mountain snow accumulations. Portions of the Rockies of Colorado, Utah, and Wyoming can all expect measurable snowfall Tuesday and into Wednesday. The disturbances tracking through the West will reach the Plains Tuesday night and into Wednesday. As high pressure moves over the eastern U.S. on Wednesday, a moist southerly flow will develop over the central U.S. generating showers and areas of wintry precipitation. While snow and ice accumulations are expected to be light, there could still be slick spots from the central Plains to the western Great Lakes during the day and into the evening hours on Wednesday. In the Southern Plains, rain will be the predominant precipitation type with a few thunderstorms possible in east Texas late Wednesday. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php