Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 307 PM EDT Sat Sep 20 2025 Valid 00Z Sun Sep 21 2025 - 00Z Tue Sep 23 2025 ...Clusters of heavy showers and thunderstorms will continue this weekend and into early next week across portions of the Midwest and Ohio Valley down toward the southern Plains with isolated concerns for severe weather and flash flooding... ...Above average temperatures are expected across much of the central and eastern U.S., with near to slightly below normal temperatures across the West as summer draws to a close... ...Scattered showers and thunderstorms will arrive again across the Southwest by the end of the weekend and into early next week along with a threat for isolated areas of flash flooding... Unsettled weather is expected across portions of the Midwest and Ohio Valley on down through parts of the southern Plains going through the remainder of the weekend and into early next week. A slow-moving upper-level trough coupled with proximity of a frontal boundary will combine with moisture and instability for multiple rounds of heavy showers and thunderstorms. These clusters of showers and thunderstorms will drive sufficient areas of rainfall for there to be an isolated threat for flash flooding. Over the next couple of days, the heaviest rainfall should generally be across areas of central and eastern Oklahoma into the Ozark Plateau and Middle Mississippi Valley where as much as 1 to 3 inches of rain may fall. Some isolated pockets of severe weather will be possible across especially the southern Plains tonight through early Sunday where locally strong, damaging winds and some large hail will be possible. On Sunday into early Monday, this threat will continue across areas of northern Texas. However, portions of the Ohio Valley and Great Lakes may see damaging winds impacting these areas as separate clusters of strong to severe thunderstorms develop here. A threat for more severe weather can be expected across the High Plains by later Monday as a new cold front approaches the region from the west. This cold front approaching the High Plains by early next week will cross the Pacific Northwest and move through the Intermountain West on Sunday bringing cooler temperatures and unsettled weather. Moderate to locally heavy rainfall will be expected for the coastal ranges and Cascades of the Pacific Northwest, but as the front moves inland, moisture advancing north through the Intermountain Region will facilitate scattered areas of locally heavy showers and thunderstorms here. This will impact areas of the central and northern Rockies going into Monday. Elsewhere, moisture advancing northward from the eastern Pacific will arrive across the Southwest by later Sunday into Monday which will bring a renewed threat for scattered showers and thunderstorms here. This will pose a threat for isolated areas of flash flooding to the normally more sensitive dry wash and burn scar locations. As summer draws to a close over the next couple of days, much of the central and eastern U.S. will be above normal for temperatures. High temperatures will be well into the 80s across large areas of the Midwest and Ohio Valley southward to the Mid-South. However, expect areas of the Gulf Coast states and especially back to the west into the southern High Plains to see high temperatures reaching well into the 90s. Temperatures will be closer to normal and locally somewhat below normal across the West as the aforementioned cold front and unsettled weather crosses these areas. Orrison/Putnam Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php