Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 415 AM EDT Mon May 02 2016 Valid 12Z Mon May 02 2016 - 12Z Wed May 04 2016 ...There is a slight risk of severe thunderstorms over parts of the Southern Mid-Atlantic... ...Heavy rain possible over parts of the Tennessee Valley to the Central Appalachians... A quasi-stationary front extending from the Mid-Atlantic/Central Appalachians southwestward to the Lower Mississippi Valley will slowly sag south and eastward to the Southern Mid-Atlantic to the Southeast and parts of the Eastern Gulf Coast by Tuesday evening. Showers and thunderstorms will develop along and ahead of the boundary from the Mid-Atlantic to the Southern Plains that will extend from the Northern Mid-Atlantic Coast to the Central Gulf Coast by Tuesday. Rain will also develop over parts of the Great Lakes to the Northeast that will slowly move into Southeastern Canada by Tuesday afternoon. Meanwhile, upper-level energy over Southern California will move slowly eastward to the Southern Plains by Tuesday. The energy will produce rain with embedded thunderstorms that will have a diurnal component to the areal coverage over parts of Central California to the Central/Southern Rockies that will end over the Region by Tuesday morning. Another area of upper-level energy will move southward from the Northern Plains to the Southern Plains by Tuesday evening. The energy will trigger rain over parts of the Northern Plains on Monday morning that will move southward to the Central High Plains by Tuesday morning. Furthermore, a front moving southward out of Central Canada on Tuesday morning will move to parts of the Upper Great Lakes/Upper Mississippi Valley and Northern Plains by Tuesday evening. Rain will move into the Upper Great Lake by Tuesday afternoon expanding southward to parts of the Middle Mississippi Valley by Tuesday evening. Elsewhere, a front over the Eastern Pacific will advance onshore over the West Coast on Monday evening into Tuesday morning traveling to parts of the Northern Intermountain Region/Great Basin by Tuesday evening. Rain will develop over parts of the Pacific Northwest into Northern California on Tuesday afternoon into evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php