453 FXUS01 KWBC 130812 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Sat Jun 13 2026 Valid 12Z Sat Jun 13 2026 - 12Z Mon Jun 15 2026 ...Strong to severe thunderstorms capable of producing damaging winds, large hail, and numerous instances of flash flooding are expected to impact the central U.S. today... ...Strong to severe thunderstorms are forecast to move across the Mid-Atlantic and the Northeast to end the weekend... ...Heat will build over the Pacific Northwest as much cooler air surges into the mid-section of the country to end the heat in the East... A surge of cool air from central Canada is working its way southward into the northern Plains. This cool air mass will overspread much of the eastern two-thirds of the country by early next week. As the cool air mass advances forward and plows into the hot and humid air, strong to severe thunderstorms are expected to erupt and expand eastward across the south-central Plains toward the Midwest today and into tonight, with the risk of damaging winds, large hail, and tornadoes to accompany these thunderstorms. In addition, locally a few inches of heavy rain can be expected with these thunderstorms leading to slight risk of flash flooding across much of the south-central Plains to the Midwest, with a moderate risk focusing around southwestern Missouri into tonight. These severe storms are expected to lose intensity by Sunday morning as they advance farther to the south toward the southern Plains. By Sunday, a low pressure wave developing along the cold front will likely trigger additional strong to severe thunderstorms from the Midwest to the Ohio Valley and through lower Great Lakes. Increasingly southerly wind ahead of the cold front will try to send heat and humidity up the East Coast once again on Sunday with high temperatures soaring to near 100 degrees in central North Carolina. The heat and humidity will aid the production of additional strong to severe thunderstorms from the Mid-Atlantic to the Northeast later on Sunday ahead of the cold front with the intensifying low pressure wave. Damaging winds appear to be the main concern with this episode of strong to severe thunderstorms on Sunday across the Northeast to the Mid-Atlantic. By Monday morning, the cold front is forecast to move off the New England coast as the refreshingly cool air from Canada will drop temperatures into the 40s and 50s across the northern and central U.S. by Monday morning. Elsewhere, a round of generally light rainfall associated with the western end of the cold front is expected to gradually taper off over the northern High Plains. Meanwhile, monsoonal showers are forecast to emerge over the Four Corners and Southern Rockies later today. The Desert Southwest and the Central Valley of California will remain hot, with highs in the 110s and 100s, respectively. Across the Pacific Northwest, heat is forecast to build, with record-high temperatures potentially reaching into the 80s and lower 90s by Sunday afternoon. Farther east, the Mid-Atlantic and Northeast will not be as hot today behind a leading front. However, the South remains hot and humid as the front will become nearly stationary. From Sunday into Monday, the South is expected to remain under the threat of showers and thunderstorms with a threat of heavy rain from the southern High Plains through northern Texas into the lower Mississippi Valley. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$