Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 334 AM EDT Wed May 28 2025 Valid 12Z Wed May 28 2025 - 12Z Fri May 30 2025 ...There is a Slight Risk of excessive rainfall over parts of the Southern Plains on Wednesday and the Central Gulf Coast to the Southeast on Thursday... ...There is a Slight Risk of severe thunderstorms over parts of the Central/Southern High Plains, Southern High Plains, and the Southern Plains on Wednesday... A wave of low pressure over the Ohio Valley will move to the Lower Great Lakes by Thursday and eastward to just off the Southeast Canadian Coast by Friday morning. Moisture will surge northward over the Southern Plains, producing showers and thunderstorms that will produce heavy rain. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Southern Plains through Thursday 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. Furthermore, severe thunderstorms will develop over parts of the Central/Southern High Plains. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Central/Southern High Plains through Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. However, there is an increased risk of hail, two inches or greater, over the western regions of Kansas. Moreover, a second area of severe thunderstorms will develop over parts of the Southern High Plains. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern High Plains through Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. A third area of severe thunderstorms will develop over parts of the Southern Plains. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Southern Plains through Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a minimal threat of tornadoes. Rain will also develop over parts of the northern Mid-Atlantic and move into parts of the Northeast and Great Lakes on Wednesday. Additionally, showers and thunderstorms will develop over parts of the Upper Midwest, Northern Plains, and Northern/Central Rockies. Further, showers and thunderstorms will develop over parts of the Mid-Atlantic, Tennessee Valley, and the Southeast, ending over the Ohio/ Tennessee Valleys and parts of the Mid-Atlantic by Thursday morning. On Thursday, the moisture flowing out of the Gulf of America will stream over parts of the Central Gulf Coast, producing showers and thunderstorms with heavy rain. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Central Gulf Coast eastward into the Southeast from Thursday into Friday 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. Also, on Thursday, rain will develop over parts of the Upper Midwest to the Northeast, ending over the Upper Midwest overnight. The rain will linger over Northern New England through Friday morning. Moreover, more scattered showers and thunderstorms will develop over parts of the Middle Mississippi Valley, Southern Ohio Valley, and the Mid-Atlantic on Thursday. Meanwhile, a front over the Pacific will move onshore over the Pacific Northwest by early Thursday morning, moving eastward to the Northern High Plains/Northern Rockies to the Great Basin by Friday morning. The system will produce scattered rain over parts of the Northwest, expanding into the Northern Intermountain Region by Thursday evening and into the Northern Rockies by Friday. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php