Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 335 AM EDT Mon Jun 30 2025 Valid 12Z Mon Jun 30 2025 - 12Z Wed Jul 02 2025 ...There is a Slight Risk of excessive rainfall over parts of the Central/Southern Plains and Southern Rockies/Southern High Plains on Monday and the Mid-Atlantic on Tuesday... ...There is a Slight Risk of severe thunderstorms over parts of the Mid-Atlantic on Tuesday... A front extending from the Upper Great Lakes, Middle Mississippi Valley, and Central/Southern Plains will move eastward to the Northeast Coast/Mid-Atlantic/Southeast and then westward into the Lower Mississippi Valley/Southern Plains by Wednesday. Showers and strong to severe thunderstorms will develop along and ahead of the boundary over parts of the Great Lakes/Ohio Valley and Middle Mississippi Valley into the Southern Plains. In addition, the showers and thunderstorms will produce heavy rain over parts of the Central/Southern Plains. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central/Southern Plains through Tuesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas the most vulnerable. Moreover, upper-level energy and moisture moving northwestward over the Southern Plains into the Southern Rockies will produce showers and thunderstorms with heavy rain over parts of the Southern Rockies/Southern High Plains. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Southern Rockies/Southern High Plains through Tuesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas the most vulnerable. South and east of the front, upper-level impulses, daytime heating, and moisture will create showers and thunderstorms over the Ohio/Tennessee Valleys, Southern Plains, Lower Mississippi Valley, and the Southeast. On Tuesday, as the front moves out of the Ohio Valley into the Mid-Atlantic, showers and severe thunderstorms will develop over parts of the Mid-Atlantic. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Mid-Atlantic from Tuesday through Wednesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, and a minimal threat of tornadoes and hail. The showers and thunderstorms will also produce heavy rain over parts of the Mid-Atlantic. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Mid-Atlantic from Tuesday through Wednesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas the most vulnerable. Further, on Tuesday, upper-level impulses, daytime heating, and moisture will create showers and thunderstorms over parts of the Southern High Plains, the Southeast, Tennessee Valleys, and the Gulf Coast States. Similarly, upper-level impulses, daytime heating, and moisture will create showers and thunderstorms over parts of Northern California, Great Basin, Southwest, and Central/Southern Rockies. Elsewhere, upper-level ridging will build into parts of the Pacific Northwest, prompting Heat Advisories over parts of Washington State, Oregon, and Idaho from Monday morning into Tuesday evening. Furthermore, as the upper-level ridging extends into the Southwest, Extreme Heat Warnings are posted over parts of the Southwest on Monday and Tuesday. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php