Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 244 AM EST Thu Nov 19 2015 Valid 12Z Thu Nov 19 2015 - 12Z Sat Nov 21 2015 ...Rain and thunderstorms expected today along most of the Eastern Seaboard... ...Fast-moving low pressure system to bring rain and snow from the Pacific Northwest to the Upper Midwest... A wet day is in store for much of the Eastern Seaboard today as a frontal system brings rain and a chance of thunderstorms from Florida north to much of New England. While the Mid-Atlantic and much of the Southeast will dry out tonight, rain will continues cross New England into Friday. 1 to 2 inches of rain will be possible along coastal portions of the Carolinas and across much of New England, with locally heavier amounts possible. Behind this system, scattered rain and snow showers will be possible today and tonight across the northern Great Lakes and portions of the Upper Midwest. An upper-level disturbance will move into the northwestern U.S. late today, with a surface low pressure system moving onshore this afternoon. Moisture is already streaming into the Pacific Northwest early this morning ahead of the system, and that is expected to continue through the day today with rain and high elevation snow near the coast, and more widespread snow expected across the northern Rockies through tonight. Heavy snow is possible across portions of the northern Rockies, with some of the higher elevations forecast to receive 1 to 2 feet of snowfall. By tomorrow, the Pacific Northwest will see dry conditions, which have been rare as of late, while snow continues across the Rockies and begins spreading into the High Plains. As the low pressure system moves east Friday and Friday night, a band of snow will occur on the northern side of the system, from portions of the central and northern plains to the Great Lakes, where 4 to 8 inches of snow are forecast. Farther south, scattered showers are possible along the front on Saturday from the southern plains to portions of the lower and mid Mississippi valley. Behind this system, a strong area of high pressure will move southward from Canada, bringing a round of below average temperatures to much of the central U.S. by Saturday. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php