Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 432 PM EDT Tue Apr 12 2016 Valid 00Z Wed Apr 13 2016 - 00Z Fri Apr 15 2016 ...Heavy rain possible for parts of the Western and Central Gulf Coast... ...There is a slight risk of severe thunderstorms over parts of Southern Texas... A quasi-stationary front extending from the Southeast Coast to the Western Gulf Coast will develop a wave of low pressure over the Western Gulf Coast that will move to along the Central Gulf Coast by Thursday. Showers and thunderstorms will develop along the boundary from the Southeast to the Western Gulf Coast that will continue through Thursday. In addition, the associated cold front moving off the East Coast will produce rain along parts of the Eastern Seaboard till late Tuesday night. Furthermore, upper-level energy over the Southern Rockies/Northern Mexico will move eastward to the Lower Mississippi Valley by Thursday. The energy will aid in developing the wave of low pressure along the front by Wednesday morning. Additionally, the energy will aid in producing rain with embedded thunderstorms over parts of the Great Basin/Southwest and parts of the Central/Southern Rockies through late Tuesday night. The energy will also aid in developing showers and thunderstorms over the Southern High Plains/Southern Plains that will move eastward to the Lower Mississippi Valley by late Wednesday night. Meanwhile, a front over the Northern Rockies into parts of the Great Basin will be reinforced by a second stronger front moving onshore over the Pacific Northwest early Thursday morning. The reinforced boundary will advance to parts of the Northern Plains into the Central Rockies and Southern California by Thursday morning. The system will produce rain along the Pacific Northwest into part of Northern California on Tuesday evening into Wednesday morning. Snow will also develop over the highest elevations inland overnight Tuesday into Wednesday. Additional rain will move onshore with the second system producing rain over the Northwest Wednesday afternoon that will expand into parts of Northern/Central California by Thursday morning. Likewise, snow will develop over the highest elevations, too. Farther inland rain with embedded thunderstorms will develop over parts of the Northern Intermountain Region to parts of the Northern/Central Rockies through late Tuesday night. Rain and higher elevation snow will develop over Northern Intermountain Region and Northern/Central Rockies on Wednesday into Thursday. By Wednesday afternoon, Showers and thunderstorms will develop over portions of the Central/Southern Rockies that will move onto parts of the Northern Plains by Thursday morning. Elsewhere, energy over the Upper Midwest will race eastward to the Northeast Coast by Thursday morning. The energy will produce a region of rain and snow over parts of the Upper Midwest Tuesday evening that will move to the Upper Great Lakes by Wednesday afternoon before dissipating. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php