Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 AM EDT Tue Aug 04 2020 Valid 12Z Tue Aug 04 2020 - 12Z Thu Aug 06 2020 ...Tropical Storm Isaias will move quickly northward over the Eastern Seaboard, spreading high winds, heavy rain, and possibly storm surge and tornadoes across the Mid-Atlantic and Northeast today and tonight... ...A High Risk of flash flooding is in place for parts of the Mid-Atlantic due to Isaias, meaning severe, widespread flash flooding is expected... ...Severe thunderstorms are possible in the High Plains today and Wednesday... Isaias is now a tropical storm and moving quickly through North Carolina as of 4 am. Isaias will continue its northward track as a tropical storm, moving through the Mid-Atlantic states today and through the Northeast tonight. Strong and gusty winds could occur, which could cause tree damage and power outages. But the greatest threat through tonight will be flash flooding associated with heavy rainfall totals of 3 to 6 inches, with isolated maximum amounts of 8 inches. A High Risk of flash flooding is in place for portions of the Mid-Atlantic, including the DC and Baltimore metro areas. Areas that do not normally experience flash flooding could, and lives and property could be in great danger. A Moderate Risk of flash flooding stretches into the Northeast. Additionally, minor to moderate river flooding is expected, and storm surge is possible along the Mid-Atlantic and Northeast coast. Tornadoes are also a threat today for the Delmarva Peninsula northward into New England. Please refer to forecasts and other products from the National Hurricane Center for additional and updated information on Isaias. Elsewhere, a slow-moving frontal boundary in the High Plains could help cause scattered thunderstorms along it, which could be severe. The Storm Prediction Center has delineated Slight Risks of severe weather in central and southern portions of the High Plains today and Wednesday for wind and hail threats. Farther west, however, dry weather could lead to fire danger in portions of the West. Temperature-wise, heat should continue across the Desert Southwest, and Excessive Heat Warnings remain in place for portions of that area. Hot temperatures of over 100 degrees are forecast for the Southern High Plains, which could set records Tuesday and Wednesday. Meanwhile, cooler than average temperatures with highs only in the 70s and low 80s are expected for the Northern/Central Plains through parts of the Mississippi Valley toward the Midwest and Ohio Valley. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php