Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 330 PM EDT Sun Aug 02 2020 Valid 00Z Mon Aug 03 2020 - 00Z Wed Aug 05 2020 ...Tropical Storm Isaias is forecast to move onshore over the Carolinians, on Monday, and cause dangerous storm surge and flash flooding as the storm moves into the Northeast... ...There is a slight to marginal risk of severe thunderstorms over parts of the Northeast and Mid-Atlantic... ...There is a slight risk of excessive rainfall over parts of the Southern Appalachians... ...Dangerous heat continues in the Desert Southwest and Intermountain West... Tropical Storm Isaias is forecast to move northward and make landfall over parts of the Carolinas on Monday. While Isaias is no longer forecast to restrengthen into a hurricane, the hazards will be dangerous storm surge of 2 to 4 feet is expected in some coastal areas of Florida. How much heavy rain occurs over eastern Florida will depend on the exact track Isaias takes. Isaias is then forecast to move north toward the Carolinas and make landfall there Monday night, causing high winds. Heavy rainfall totals are expected to cause potentially life-threatening flash flooding over the Carolinas and then the Mid-Atlantic Monday and Tuesday as Isaias moves north, and Moderate Risks of flash flooding are in place. Please see the National Hurricane Center for further and updated information on Isaias. A couple of frontal systems are forecast to cause rain and thunderstorms in the Midwest toward the Eastern Seaboard through Sunday night. The heaviest rainfall is forecast for the Southern Appalachians, and a Slight Risk of flash flooding through Monday morning. Farther north, a Slight Risk of severe weather is forecast for parts of the Northeast. Additionally, a Marginal Risk of flash flooding is in place for portions of Arizona, New Mexico, and Colorado, where scattered thunderstorms could cause locally heavy rainfall totals as they could be slow-moving. Another hot day is expected in the West underneath a persistent upper-level ridge. Temperatures in the 110s are forecast to persist in the Desert Southwest, leading to continued Excessive Heat Warnings in some areas on Sunday. Heat Advisories stretch northward into the Intermountain West as temperatures over 100 degrees are possible and record highs could be set. Temperatures should remain warm on Monday except in the Northern Great Basin, where a cold front will help moderate temperatures. Meanwhile, cooler than average temperatures with highs only in the 70s are expected for the Northern/Central Plains. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php