Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 405 PM EDT Sat May 14 2016 Valid 00Z Sun May 15 2016 - 00Z Tue May 17 2016 ...Heavy rain possible over parts of the Western Gulf Coast... ...Temperatures will be 10 to 20 degrees below average from the Northeast to the Carolinas southwestward to the Central/Southern Plains... An upper-level low over the Great Lakes will move just east of Maine by Monday. The system will produce rain from parts of the Northeast to the Carolinas and northwestward into the Great Lakes/Ohio Valley that will move off the coast overnight Saturday. On Sunday, rain showers will develop over the Great Lakes/Ohio Valley to the Northeast that will have a strong daytime heating element to the areal coverage. Overnight Sunday, additional upper-level energy will rotate around the upper-level low that will produce rain over parts of the Upper Mississippi Valley/Upper Great Lakes Sunday into Monday morning. Meanwhile, another upper-level low will move onshore over the Pacific Northwest that will move inland over the Northern Rockies by Monday morning. The energy will produce rain over the Pacific Northwest Coast through Monday while rain with embedded thunderstorms will develop over parts of the Northern Intermountain Region and the Northern Rockies also through Monday. Additionally, showers and thunderstorms will develop over parts of the Great Basin to the Central Rockies and from the Southwest to the Western Gulf Coast that will expand into the Central/Southern Plains on Sunday into Monday. In addition, snow will develop over the highest elevations of Wyoming. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php