832 FXUS01 KWBC 090710 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 309 AM EDT Sun Aug 09 2026 Valid 12Z Sun Aug 09 2026 - 12Z Tue Aug 11 2026 ...Heat to persist across much of the CONUS, with record highs possible across portions of the West and Central Rockies... ...Severe thunderstorms and heavy rainfall possible across the Northern Plains/Upper Midwest, Great Lakes, and Northeast over the next few days... As we approach mid-August, much of the Nation's weather pattern will remain under the influence of a broad upper-ridge extending across the Southern Tier through midweek. This pattern will maintain above-normal temperatures across much of the Lower 48, with the greatest temperature anomalies extending from California and the northern Intermountain West eastward to the mid Mississippi Valley. Record-breaking highs in the upper 90's and triple digits with very warm overnight lows are expected across portions of the Southwest, Central Rockies, and High Plains today and tomorrow. Along the periphery of the ridge, a series of disturbances lifting out of the western Gulf will support daily periods of showers and thunderstorms from parts of the southern Plains and western Gulf Coast into the Southeast. Monsoonal convection will also provide some localized relief from the heat across the Southwest and Great Basin, but these storms will pose a threat for heavy rainfall and flash flooding. Farther north, drier conditions will persist from parts of the Cascades eastward to the northern High Plains, supporting continued elevated fire weather concerns. Meanwhile, a west to east oriented frontal boundary in the Heartland will focus thunderstorm chances from the Northern Plains through the Great Lakes and Northeast. Widely scattered flash flooding and severe weather are possible today and tomorrow. Today, a concentrated area of damaging winds and hail is expected across the Dakotas while scattered damaging wind gusts will also be possible from eastern Iowa across northern Illinois and Indiana. On Monday, thunderstorms capable of producing severe wind gusts will be possible from parts of northern Illinois eastward into western Pennsylvania, with isolated severe gusts and hail also possible from portions of the central and northern Plains into the Midwest. In addition to damaging winds and hail, some of these thunderstorms will produce locally heavy rainfall and flash flooding. The greatest potential for heavy rainfall and flash flooding remains focused across the southern Great Lakes and upper Ohio Valley, where multiple rounds of convection could produce locally heavy rainfall and exacerbate flash flood concerns. Showers and thunderstorms will remain possible through midweek, particularly across the Northeast and Mid-Atlantic. Asherman/Pereira Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$