Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 AM EDT Mon Apr 24 2017 Valid 12Z Mon Apr 24 2017 - 12Z Wed Apr 26 2017 ...Heavy rain possible over the Carolinas... ...Heavy rain possible over parts of the Pacific Northwest/Northern California... ...Snow possible for parts of the Northern/Central Rockies and the Cascades... Low pressure over the Southeast will slowly move northward to the North Carolina Coast by Tuesday evening. The system will produce showers and thunderstorms over parts of the Southeast and portions of the Southern Mid-Atlantic that will move off the Southeast Coast by Tuesday morning and remain over parts of the Southern Mid-Atlantic Coast through Tuesday evening. Rain will also develop over the Virginias that will slowly expand northward into the Northern Mid-Atlantic/Lower Great Lakes and Southern New England by Tuesday morning and continue to expand northward into Northern New England by Tuesday evening. Meanwhile, a front extending from the Northern Plains to the Central High Plains into the Great Basin will move eastward to the Upper Great Lakes/Middle Mississippi Valley to the Southern High Plains into the Southwest by Tuesday evening. The storm will produce rain and snow over parts of the Northern Plains into the Upper Great Lakes that will move into parts of Upper/Middle Mississippi Valley and Northern Plains by Monday evening. As the system moves eastward, moisture will move northward from the Western Gulf of Mexico and pool along the boundary. Showers and thunderstorm will start to develop near the front over the Middle Missouri Valley overnight Monday expanding into the Central Plains by Tuesday morning and continuing over the region into Tuesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php