Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 333 PM EST Sun Jan 22 2017 Valid 00Z Mon Jan 23 2017 - 00Z Wed Jan 25 2017 ...There is a slight risk of severe thunderstorms over the Southeast into parts of the Southern Mid-Atlantic with an embedded region of moderate and high risk... ...Heavy rain possible along the Southern California Coast... ...Heavy snow for the Sierras... ...Heavy rain over parts of Southern New England... Low pressure over the Southern Appalachians will move northeastward to off the Mid-Atlantic Coast by Tuesday. Showers and thunderstorms will develop over parts of the Southeast through Monday morning, some of the thunderstorms will be severe. Rain will also develop over parts of the Lower Mississippi Valley to Southeast and parts of the Great Lakes/Ohio Valley along with parts of the Mid-Atlantic that will end over the Lower Mississippi Valley by Monday and over the Southeast overnight Monday. The rain will also end over most of the Ohio Valley by Tuesday morning. Snow will develop over parts of Maine on Sunday evening that will expand into parts of the Lower Great Lakes and Central Appalachians that will become a wintry mix of snow, sleet, and or rain/freezing rain overnight Monday into Tuesday. Meanwhile, a deep upper-level low just off the Northwest Coast will move eastward to the Central High Plains by Tuesday. Moisture flowing into Southern/Central California will slowly weaken overnight Sunday. The storm will produce coastal rain and higher elevation snow over the Pacific Northwest and snow over the Northern Rockies that will wane on Monday. Rain and higher elevation snow will also develop over California and snow over the Western Great Basin that will start to wane by Tuesday morning. Snow and lower elevation rain will develop over parts of the Great Basin, Southwest that will move into parts of the Central/Southern Rockies by Monday morning. In addition, snow and rain will develop over parts of the Northern/Central Plains by Monday evening continuing through Tuesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php