Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Mon Aug 04 2025 Valid 00Z Tue Aug 05 2025 - 00Z Thu Aug 07 2025 ...A slight risk of excessive rainfall continues across interior Southeast through Tuesday, with a marginal risk spreading north into the Mid-Atlantic on Wednesday... ...Rounds of strong to severe thunderstorms expected to move across the northern Plains through Tuesday, reaching into the upper Midwest on Wednesday... ...Air Quality Alerts from the upper Midwest to the Great Lakes and into much of the Northeast... ...Extreme Heat Watches and Extreme Heat Warnings across the Desert Southwest and into Arizona... A large dome of cool air will continue to provide cooler than normal conditions for early August from the Great Plains to a good portion of the eastern U.S. especially the interior Southeast through the next couple of days. The southern boundary of this cool dome will remain nearly stationary with rounds of moderate to heavy rain and embedded thunderstorms, leading to a slight risk of excessive rainfall from Florida Panhandle northward into the interior Southeast. A slow-moving upper-level trough across the east-central U.S. will tend to lift the rain slowly northeastward up into the Mid-Atlantic region by Wednesday. Scattered heavy showers and embedded thunderstorms are expected to raise a marginal risk of excessive rainfall from the Florida Panhandle up into the southern Virginia on Wednesday. Meanwhile, scattered thunderstorms across the interior Pacific Northwest into the northern Rockies are becoming more widespread as an upper-level trough from the Pacific pushes onshore. A round of strong to severe thunderstorms is expected to impact the northern and central High Plains this evening and tonight. By Tuesday, a low pressure wave is forecast to develop over the northern High Plains. This wave will trigger additional rounds of strong thunderstorms across the northern Plains on Tuesday, reaching into the upper Midwest on Wednesday near and ahead of a warm front lifting northeastward. For the remainder of the western U.S., Extreme Heat Watches and Warnings remain in effect for high temperatures exceeding 110 degrees across the Desert Southwest and southern Arizona. Over the Great Basin to the Four Corners, elevated to critical fire weather danger is anticipated through the next couple of days with the arrival of the aforementioned cold front which is forecast to stall across the Great Basin. Across the upper Midwest into the Great Lakes as well as much of the Northeast, smoke from Canadian wildfires has continued to prompt Air Quality Alerts, with high temperatures above normal into the mid and upper 80s through the next couple of days. For information on staying cool and safe, visit www.weather.gov/safety/heat. As temperatures rise, limit outdoor activity, stay hydrated, and ensure access to air-conditioning and other cooling areas. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php