Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 343 PM EST Tue Jan 16 2018 Valid 00Z Wed Jan 17 2018 - 00Z Fri Jan 19 2018 ...Rain/freezing rain/sleet possible over parts of the Central/Eastern Gulf Coast into Georgia... ...Heavy snow possible over parts of New England... ...Heavy rain and snow, over the Cascades, over the Pacific Northwest into Northern California... ...Snow possible over the Mid-Atlantic... A strong upper-level trough extending from the Great Lakes to the Middle Mississippi Valley will move eastward off the Eastern Seaboard by Thursday morning. Snow will develop over parts of the Northeast southwestward to parts of the Lower Mississippi Valley/Western Gulf Coast that will move eastward to Mid-Atlantic/Southeast by Wednesday morning, while expanding northward into New England. The snow will end over the Mid-Atlantic by late Wednesday evening. On Wednesday, the snow will become heavy at times over New England becoming light snow by Wednesday evening and ending overnight Wednesday. In addition, along the parts of the Western/Central Gulf Coast, rain/freezing rain/sleet will develop on Tuesday evening that will move eastward overnight Tuesday to the Eastern Gulf Coast by Wednesday morning. The rain/freezing rain/sleet will end on Wednesday morning, while moving over parts of the Southeast. Meanwhile, upper-level energy over parts of the Northern Intermountain Region/Northern Rockies will move slowly eastward to the Upper Mississippi Valley by Thursday. The energy will aid in producing coastal rain over parts of the Pacific Northwest on Tuesday evening ending overnight Tuesday. Farther inland, snow and lower elevation rain will develop over parts of the Cascades into parts of the Northern Intermountain Region/Northern Rockies that will likewise end overnight Tuesday. As the energy moves eastward, light snow will develop over parts of the Upper Mississippi Valley late Wednesday night into Thursday. Additionally, a deepening upper-level trough over the North Pacific will begin to move onshore over the Pacific Northwest/Northern California Wednesday afternoon into Thursday. A head of the energy, moisture along the West Coast will begin to move inland over parts of California/Pacific Northwest overnight Tuesday. By Wednesday morning, rain will develop over parts of the Pacific Northwest with snow developing over the Cascades by Wednesday afternoon. On Wednesdsay evening, rain will develop over parts of Northern California as rain and higher elevation snow continues over the Northwest, as both continuing into Thursday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php