Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 342 AM EDT Sun Apr 17 2016 Valid 12Z Sun Apr 17 2016 - 12Z Tue Apr 19 2016 ...There is a slight risk of severe thunderstorms over the Southern Plains... ...Heavy rain possible from parts of the Northern Plains to the Southern Plains... ...Heavy snow possible over parts of the Central Rockies and the surrounding areas... A deep upper-level low pressure system will remain stalled over the central Plains through midweek. Scattered showers are forecast from the Upper Midwest to the Northeast as a cold front sags southward out of Canada. Widespread precipitation will develop along and ahead of the nearly stationary boundary as Gulf moisture streams northward. Strong to severe thunderstorms will be possible today and again on Monday across portions of Texas. The Storm Prediction Center has highlighted a portion of the southern plains with a slight risk for both days. Heavy rain will be likely, therefore the risk for flash and river flooding will be elevated. Excessive rainfall outlooks have issued for portions of the southern and central plains east of the Front Range. In addition, snow will develop over parts of the Central Rockies and parts of the Northern/Central High Plains through Monday. At times higher elevation snow and lower elevation rain will develop over parts of the Southern Rockies through Monday. Mountain snow accumulations of 6 to 12 inches, with isolated higher amounts are forecast through midweek. Lower elevations will generally have amounts less than 6 inches. Elsewhere, showers and thunderstorms will develop over parts of Florida through tonight along a dissipating front over Southern Florida. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php