Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 358 AM EDT Thu Apr 27 2017 Valid 12Z Thu Apr 27 2017 - 12Z Sat Apr 29 2017 ...Heavy rain possible from parts of the Southern Plains to the Southern Ohio/Tennessee Valleys... ...Heavy snow possible over parts of the Northern/Central Rockies... A front extending from the Great Lakes southward to Central Gulf Coast that will move eastward to the Northeast while weakening by Friday morning. Showers and thunderstorms will develop along and ahead of the front, likewise, from the Great Lakes to the Central Gulf Coast that will also move eastward to off the Northeast/Mid-Atlantic Coast by Friday afternoon. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php