Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 349 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 should 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... ...Excessive heat continues in the Desert Southwest with warm temperatures across the 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 near 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 is expected to lift northeastward across the Ohio Valley and Great Lakes through Saturday night, causing potentially heavy rain along it. A Slight Risk of flash flooding is in place for those areas toward portions of the Mid-Atlantic, and 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 lead frontal system should shift toward the Eastern Seaboard, leading to thunderstorms there. A Slight Risk of severe weather is in place for the Northern Mid-Atlantic to Northeast, and there is a Slight Risk of flash flooding 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. Additionally, Marginal Risks of flash flooding are in place for the Southern Rockies to Southern High Plains with some monsoonal moisture. Across the West, above normal temperatures will remain underneath an upper-level ridge. Temperatures in the 110s are forecast to persist in the Desert Southwest, leading to continued Excessive Heat Warnings, and an Elevated Risk of fire weather has been delineated from the Storm Prediction Center through Sunday morning. Heat Advisories stretch northward into the Intermountain West as temperatures over 100 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