Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 445 PM EDT Sat Aug 01 2020 Valid 00Z Sun Aug 02 2020 - 00Z Tue Aug 04 2020 ...Hurricane Isaias is currently passing over the Bahamas and will impact the U.S. East Coast with dangerous storm surge and flash flooding regardless of landfall... ...There is a Slight Risk of severe thunderstorms and a Slight Risk of excessive rainfall over parts of the Ohio Valley into the mid Atlantic... ...Dangerous heat continues in the Desert Southwest and Intermountain West... Hurricane Isaias will continue to batter the Bahamas with hurricane conditions and dangerous storm surge. The hurricane is forecast to move northwestward and skirt the Florida east coast Saturday night and Sunday, and Hurricane Warnings have been issued there for high winds. While it is uncertain if Isaias will make landfall in Florida, dangerous storm surge and potentially life-threatening flash flooding could occur regardless, and small shifts in the track could lead to different impacts, so preparation for hazardous weather is necessary. Isaias is currently forecast to turn northward and then northeastward Sunday and Monday, and could impact the Carolinas with heavy rain and wind. Please consult the National Hurricane Center for further and updated information on Isaias. A low pressure and frontal system is expected to lift northeastward across the Ohio Valley and Great Lakes this afternoon and tonight, producing strong storms and heavy rain. A Slight Risk of excessive rainfall is in place for those areas, and also extending toward portions of the mid Atlantic. A Slight Risk of severe weather is also forecast for eastern portions of the Ohio Valley into the Central Appalachians/mid Atlantic. Then on Sunday, the frontal system should move toward the Eastern Seaboard, leading to thunderstorms there. A Slight Risk of severe weather is forecast over the Northern mid Atlantic to the Northeast, and there is a Slight Risk of excessive rainfall over the Southern/Central Appalachians. Showers and thunderstorms are also possible with a secondary frontal system moving through the Midwest, but rainfall totals are expected to remain light. Across the West, above normal temperatures will remain underneath an upper-level ridge. Temperatures above 110 degrees are forecast to persist in the Desert Southwest, leading to continued Excessive Heat Warnings. An Elevated Risk of wildfires has been delineated from the Storm Prediction Center through Sunday morning. Heat Advisories stretch northward into the Intermountain West as temperatures over 100 degrees are possible and record highs could be set. Meanwhile, cooler than average temperatures are expected for much of the Plains toward the Midwest. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php