Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 148 PM EST Mon Jan 6 2020 Valid 00Z Tue Jan 7 2020 - 00Z Thu Jan 9 2020 ...Heavy precipitation for the Northwest and some snow for the Appalachians and parts of the Mid-Atlantic... An active weather pattern will continue for the northwestern U.S. through the middle of the week, as a warm front has passed through earlier ahead of a cold front expected to move through Tuesday evening. A deep surge of Pacific moisture flowing into the region will result in heavy rainfall and localized flooding for windward terrain of western Washington and Oregon through Tuesday. Several feet of snow is possible for the highest elevations of the Cascades and Olympics, and lighter snow accumulations are likely across the northern Rockies and extending eastward to the Dakotas. Across the southeastern U.S., a low pressure system is forecast to begin developing across the Tennessee Valley and then reach the southern Appalachians by Tuesday morning. Precipitation is forecast in the vicinity of this low, with light rain in the Tennessee Valley and snow developing across the central and southern Appalachians tonight and into Tuesday morning. As the low tracks northeastward, light snow and a rain/snow mix could spread across portions of the Mid-Atlantic on Tuesday. By Tuesday night and Wednesday, snow light snow is likely across the Northeast as the low moves offshore. The majority of the nation is expected to have temperatures above average on Tuesday from the Intermountain West to the Northeast and below average across the Dakotas and parts of the Upper Midwest. The colder temperatures reach the Great Lakes and towards the East Coast by the middle of the week, and remaining above average across the southern tier. D. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php