Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 258 PM EST Mon Dec 04 2017 Valid 00Z Tue Dec 05 2017 - 00Z Thu Dec 07 2017 ...Heavy rain and snow to be delivered throughout the eastern U.S. as an impressive storm system sweeps across the area... A strong cold front moving over the Mississippi Valley will continue its eastward trek toward the East Coast through midweek. On Monday evening, showers and thunderstorms will move from the Upper Midwest to the southern Plains. Some of the convective activity in the lower Mississippi Valley may give way to flash flooding--creating a marginal risk for flash flooding. Areas north and west of the low--in the northern/central Plains and parts of the Upper Midwest--can expect light to moderate snow tonight and into tomorrow. By Tuesday, the cold front will stretch from the Northeast to the southern Plains. The line of showers and thunderstorms will continue moving along and ahead of the boundary. There could be heavy rainfall in parts of the Southeast on Tuesday afternoon--thus a marginal risk of flash flooding is possible. Precipitation is expected to spread across the Southeast, Mid-Atlantic, and Northeast throughout the day. By Wednesday morning, most of the precipation will move off the East Coast as the front exits to the Atlantic. However, as the front moves southward over Florida--it will also bring showers and thunderstorms with it. Lingering preciptition can also be expected across Texas. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php