Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 342 PM EDT Thu Sep 29 2016 Valid 00Z Fri Sep 30 2016 - 00Z Sun Oct 02 2016 ...Heavy rain threat continues through Saturday from the Ohio Valley to the Mid-Atlantic and the Northeast... ...Scattered showers and thunderstorms will be possible over the Southwest and Rockies... A large upper level low spinning over the Ohio Valley keeps widespread showers and thunderstorms in the forecast the next couple of days from the Mid-Atlantic and Northeast and back into the lower Great Lakes/Ohio Valley. Heavy rainfall is likely, especially across the Mid-Atlantic and central Appalachians, as deep Atlantic moisture wraps northwestward into the system. Given the heavy rainfall which has already fallen today, flooding and flash flooding will continue to be a threat, with flash flood watches in effect through Friday morning. Out West, showers and thunderstorms will be possible across the Four Corners region and into the Rockies as a slow moving surface cold front pushes into the northern Intermountain West this evening, reaching the northern Rockies by the weekend. Locally heavy rainfall will be possible, especially along the favored terrain of the Rockies. Rain also gets into the Pacific Northwest by Saturday as the upper level system approaches the region. As for temperatures across the country, under the upper low over the Ohio Valley and back into the southern Plains, temperatures are expected to be roughly 5 to 10 degrees below seasonal norms feeling much like Fall should feel. Ahead of the approaching front in the Intermountain West, the opposite is true as temperatures could be as much as 5 to 15 degrees above average. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php