Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 413 PM EDT Wed May 04 2016 Valid 00Z Thu May 05 2016 - 00Z Sat May 07 2016 ...Heavy rain possible over parts of the Southern Mid-Atlantic and Central Appalachians... ...Temperatures will be 10 to 20 degrees below average from the Northeast to the Southeast and westward to the Tennessee/Ohio Valleys... Complicated area of low pressure over the Mid-Atlantic will slowly begin to move to the northeast by Friday. Showers and thunderstorms will develop along the Southern Mid-Atlantic Coast to Florida that will move off the coast overnight Wednesday. Rain will develop from the Great Lakes to the Tennessee Valley eastward to the Northeast/Northern Mid-Atlantic that will move off most of the Northeast Coast by Thursday morning. The rain will move back over the Northeast on Thursday evening and continuing through Friday. The rain over the Great Lakes to the Tennessee Valley will rotated into the Southern Mid-Atlantic by Thursday morning continuing through Friday. Meanwhile, an upper-level low off the California Coast will deepen while moving inland over parts of California into the Great Basin/Southwest by Friday. Rain will develop over parts of the Pacific Northwest Coast through Thursday afternoon. Rain with embedded thunderstorms will develop over parts of California/Great Basin and the Northern Intermountain Region through Friday. The rain with embedded thunderstorms will expand into parts of the Northern/Central Rockies Thursday afternoon into Friday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php