Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 404 PM EDT Tue Jul 30 2013 Valid 00Z Wed Jul 31 2013 - 00Z Fri Aug 02 2013 ...Heavy Rain moving across the Ohio/Tennessee Valleys on Wednesday and into the Mid-Atlantic on Thursday... ...Scattered showers and thunderstorms from the Northern Plains to the Great Lakes as well as across the Southeast... The rather robust and organized complex of heavy rain and thunderstorms which moved through the Middle Mississippi Valley on Tuesday will continue to propagate eastward across the Ohio and Tennessee Valleys on Wednesday. A warm front across the region will continue to pump anomalous amounts of moisture up from the Gulf of Mexico to fuel these storms and allow the threat for flash flooding to remain. By early Thursday morning, the warm front will begin creeping into the Mid-Atlantic region bringing showers and thunderstorms to the region on Thursday. As some storms across the central Appalachians become more organized in nature during the daytime hours, flash flooding could be a concern. The eastern portion of the above mentioned frontal boundary should remain draped across the Southeastern states before pushing northward into Southern Virginia by Thursday morning. This will keep scattered showers and thunderstorms in the forecast from the eastern Gulf coast states and Florida to the Carolinas. Elsewhere, a cold front currently pushing into the Upper Midwest will continue to move eastward into the Great Lakes area by Wednesday evening. Showers and thunderstorms associated with the frontal system will move from the Northern Plains and Upper Midwest on Wednesday into the Great lakes region by Wednesday afternoon and eventually into the western portion of New England by Thursday morning. Rainfall should remain scattered and light in nature, but isolated storms could be more organized with the capability to produce some severe weather. Refer to the Storm Prediction Center for the latest on the severe weather threat. Monarski Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php