Prognostic Meteorological Discussion
Issued by NWS
Issued by NWS
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293 FXUS01 KWBC 241959 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 358 PM EDT Fri Jul 24 2026 Valid 00Z Sat Jul 25 2026 - 00Z Mon Jul 27 2026 ...Risk of flash flooding expected from the Central Plains to the Carolinas near a stalled frontal boundary... ...Monsoonal thunderstorms continue over the Southwest and into portions of the Intermountain West and Rockies... ...Hazardous heat continues over parts of the Southern Tier; builds over the Great Basin and Northern Plains Friday... Rainfall and gusty winds associated with remnants of Bertha have diminished over Texas however tropical moisture converging over the stalled frontal boundary will continue to fuel showers and thunderstorms for the eastern Carolinas into the weekend. This will lead to bad weather conditions for beach and boating interests through the remainder of the week, and an increased threat of flash flooding from thunderstorms that repeatedly develop over the same areas. A large upper ridge anchored over the Intermountain West will expand toward the Gulf states resulting in a large portion of the country to have hot conditions. The hottest places are expected to be the lower elevations of the Desert Southwest through Saturday with highs in the 110s, and this will also be accompanied with some humidity to produce heat indices near or slightly above the actual temperatures across southern California and into southern Arizona. Heat also builds across the western High Plains from central Montana to the Dakotas through Saturday with widespread major Heat Risk, and extreme heat warnings are already in effect for much of central and eastern Montana. Heat and oppressive humidity will remain persistent from the southern Plains to Florida as this region will remain south of the stalled frontal boundary, with highs well into the 90s and dewpoints well into the 70s. Cooler than and/or near average temperatures are forecast for much of the Great Lakes, Northeast and northern Mid-Atlantic regions in the wake of the relatively strong cold front passage. Monsoonal moisture in place across the Intermountain West and the Rockies will fuel the development of daily afternoon and evening convection, some of which could be locally heavy and result in flooding across vulnerable locations. A Slight Risk of severe thunderstorms per the Storm Prediction Center is valid for Friday across portions of North Dakota and into northern Minnesota ahead of a shortwave trough. Campbell/Hamrick Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$