Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 350 PM EDT Wed Apr 24 2019 Valid 00Z Thu Apr 25 2019 - 00Z Sat Apr 27 2019 ...There is a slight risk of severe thunderstorms over parts of the Western Gulf Coast and the Southern Plains... ...Heavy rain possible over parts of the Central Gulf Coast, Southern Plains, and the Ohio Valley... ...Temperatures will be 10 degrees above average over parts of California and the Desert Southwest... A front extending from the Mid-Atlantic to the Western Ohio Valley southward to the Southern Plains will move will move eastward to the Eastern Seaboard by Friday. Moisture from the Western Gulf of Mexico will stream northward into the Lower Mississippi Valley and the Ohio Valley will, likewise, move eastward the East Coast by Friday. The overrunning moisture and upper-level dynamics will aid in producing showers and thunderstorms from the Ohio Valley southwestward to the Lower Mississippi Valley that will move eastward to the Mid-Atlantic to the Southeast by Friday. Rain will develop over parts of the Middle Mississippi Valley into parts of the Great Lakes on Thursday evening that will move eastward into the Northeast by Friday morning into Friday evening. Heavy rain across parts of the Southern Plains will aid in developing excessive rainfall over the region within a slight risk for flash flooding. A second front extending from the Upper Mississippi Valley across parts of the Central Plains westward to parts of the Great Basin will move eastward to the Great Lakes by Thursday and into parts of the Central Appalachians to parts of the Lower Mississippi Valley by Friday. Showers and thunderstorms will develop along the boundary over parts of the Central Plains to the Great Basin that will change to rain over parts of the Central Rockies to parts of the Upper Mississippi Valley overnight Wednesday. The rain will move eastward to the Great Lakes by Thursday evening. Weak upper-level energy over the Great Basin/Central Rockies will aid in producing showers and thunderstorms over parts of the Great Basin into the Central Rockies on Thursday evening into Friday. Additional upper-level energy will move into the Pacific Northwest overnight Thursday moving into parts of the Northern Rockies by Friday evening. The energy will aid in producing rain with embedded thunderstorms over parts of the Northern Intermountain Region on Friday morning moving into the Northern/Central Rockies by Friday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php