Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Wed Jun 19 2019 Valid 12Z Wed Jun 19 2019 - 12Z Fri Jun 21 2019 ...There is a slight risk of severe thunderstorms from parts of the Southern Plains into parts of the Ohio/Tennessee Valleys with an embedded region of enhanced risk of severe thunderstorms over parts of northeastern Texas... ...There is a slight risk of excessive rainfall over parts of the Ohio Valley into parts of the Northern Mid-Atlantic and parts of the Northern Plains... ...There is an embedded region of moderate risk of excessive rainfall over parts of Illinois, Indiana, and Ohio... ...In the West, fire weather conditions expected in the Columbia Basin and then snow in higher elevations of the Cascades and Northern Rockies... An area of disorganized upper-level energy over parts of the Mid-Atlantic will move eastward off the Mid-Atlantic Coast by overnight Wednesday. The energy will aid in producing showers and thunderstorms over parts of the Southeast, Eastern Ohio Valley, and Mid-Atlantic on Wednesday moving off the coast by Thursday morning. Another region of disorganized upper-level over Central/Southern Plains will move eastward to the Mid-Atlantic by overnight Thursday. The energy will aid in producing showers and thunderstorms over parts of the Middle/Lower Mississippi Valley and the Central/Southern Plains, on Wednesday, that will move eastward into parts of the Ohio/Tennessee Valleys into parts of the Lower Mississippi Valley by Thursday morning. By Thursday evening, the showers and thunderstorms will move to parts of Southern New England, Mid-Atlantic, Eastern Ohio Valley, and the Tennessee/Lower Mississippi Valley moving off the coast by Friday morning. A weak front extending from Great Lakes southwestward into the Middle Mississippi Valley will move eastward into the Northeast on Thursday morning, dissipating by Thursday evening. The boundary will aid in producing rain over parts of the Great Lakes into the Middle Mississippi Valley, on Wednesday. By Wednesday evening, the front will move into the Lower Great Lakes and parts of the Northeast producing showers and thunderstorms that will slowly move eastward off the Northeast/Northern Mid-Atlantic Coast by Friday morning. Meanwhile, upper-level energy over the Northern High Plains will move into the Northern Plains by Wednesday evening, while reinforcing upper-level energy will move into the Northern Plains by Thursday morning. The energy will produce showers and thunderstorms over parts of the Northern High Plains moving into the Northern Plains by Wednesday evening. Additional showers and thunderstorms will move into the Northern Plains overnight Wednesday moving into parts of the Upper/Middle Mississippi Valley by Thursday evening. Furthermore, an upper-level low over Western Canada will move southeastward into the Pacific Northwest eastward to the Northern High Plains by Friday. The energy will aid in producing rain over parts of the Pacific Northwest into the Northern Intermountain Region by Wednesday afternoon into Thursday evening. Showers and thunderstorms will begin to develop over parts of the Northern Rockies overnight Wednesday, with some snow over some of the highest elevations. More showers and thunderstorms will develop over the Northern/Central Rockies on Thursday afternoon into evening. Some of the highest elevations will get snow while the lower elevations receive rain through Friday morning Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php