508 FXUS01 KWBC 310505 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 103 AM EDT Sun May 31 2026 Valid 12Z Sun May 31 2026 - 12Z Tue Jun 02 2026 ...Showers and thunderstorms continue across Northern Rockies into the Southeast through Monday... ...Slight Risk for excessive rainfall and flash flooding over parts of the Southeast on Sunday... ...Moderate to isolated Major HeatRisk over parts of the southern Plains... Unsettled weather continues as a frontal passage stretches from Northern Rockies downward into the Plains and across the Southeast. This will bring multiple rounds of showers and thunderstorms along the boundary. With the combination instability, shortwave disturbances, and a increase in warm moisture, the system may bring moments of heavy rainfall across the Southeast on Sunday, which will bring flooding concerns over soils that remain saturated. Therefore, Weather Prediction Center (WPC) has highlight a Slight Risk (level 2/4) of excessive rainfall over portions of the Southeast. Elsewhere along the boundary, there is a Marginal Risk (level 1/4) of excessive rainfall stretching from the Northern Rockies into the Plains, as the system is expected to bring intense rainfall rates that can produce flash flooding on Sunday. Storm Prediction Center (SPC) has also issued a Marginal Risk (level 1/5) of severe thunderstorms across the Dakotas into the Ozarks and parts of western Texas. On Monday, the quasi-stationary frontal system slightly moves northeastward with a upper low sitting over northwestern U.S., which will continue to bring showers and thunderstorms over parts of eastern U.S. With multiple shortwave disturbances and sufficient instability, SPC has highlighted a Slight Risk (level 2/5) of severe thunderstorms from eastern Colorado into Kansas with a Marginal Risk (level 1/5) across parts of central U.S. and the Southeast. Additional hazards associated with this storm will be large hail and severe wind gusts. Over the next few days, much of CONUS will see closer to average to above normal temperatures, while the northern Rockies will still see below normal temperatures. Over the southern Plains, temperatures will climb to the 90s, which will bring moderate to major HeatRisk concerns. Oudit Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$