Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Mon May 06 2019 Valid 00Z Tue May 07 2019 - 00Z Thu May 09 2019 ...There is a slight risk of severe thunderstorms over parts of the Central/Southern Plain into parts of the Middle Mississippi Valley... ...There is a slight risk of excessive rainfall with an embedded area of moderate risk over parts of the Central Plains and Middle Mississippi Valley... ...There is a slight risk of excessive rainfall over the southern tip of Texas... A front extending from the Lower Great Lakes to the Central Plains and banked up against the Central Rockies will slowly move southward to the Mid-Atlantic westward to the Central Plains and quasi-stationary into the Central Rockies by Wednesday. Showers and thunderstorms will develop along and near the boundary from parts of Northwestern Ohio Valley to the Central Plains and into parts of the Central Rockies that will continue over the Western Ohio Valley westward into Central High Plains through Wednesday. Rain will also develop over parts of the Great Lakes that will move into the Lower Great Lakes and into parts of the Northeast overnight Monday and into the Northern Mid-Atlantic on Tuesday afternoon The rain will move off the Northeast Coast overnight Tuesday. Rain will also develop over parts of the Northern Plains on Monday evening continuing into Wednesday. Meanwhile, moisture flowing northward over the Southern Plains east of a dryline and favorable upper-level dynamics will aid in producing showers and thunderstorms over the Southern Plains through Tuesday evening. An upper-level low over Southern California will move roughly eastward to the Central/Southern High Plains by Wednesday morning and into the Central Plains by Wednesday evening. The added energy will aid in producing showers and thunderstorms over parts of the Southern High Plains overnight Tuesday that will move eastward into the Southern Plains by Wednesday morning that will expand into parts of the Lower Mississippi Valley by Wednesday evening. The energy will also develop rain over parts of California into parts of the Great Basin on Monday evening. The rain will move into parts of the Southwest on Tuesday. The upper-level trough associated with the energy will aid in producing snow at the highest elevations over parts of the Eastern Great Basin and Central Rockies overnight Tuesday into Wednesday. In addition, diurnal heating will aid in producing rain and embedded thunderstorms over parts of the Northern Rockies on Tuesday into Wednesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php