Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 PM EDT Sat Apr 15 2017 Valid 00Z Sun Apr 16 2017 - 00Z Tue Apr 18 2017 ...There is a slight risk of severe thunderstorms from Southern/Central Plains to parts of the Middle Missouri Valley/Middle Mississippi Valley... ...Heavy rain possible over parts of eastern Oklahoma... A front extending from the Upper Great Lakes to the Southern High Plains will move eastward to off the Northeast Coast while extending westward from the Mid-Atlantic to Southern High Plains by Monday. Showers and thunderstorm will develop along and ahead of the boundary from the Upper Great Lakes/Upper Mississippi Valley to the Southern Plains that will move to the Northeast Coast by overnight Sunday. In addition, the showers and thunderstorms will extend from parts of the Mid-Atlantic to the Southern Plains through Monday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php