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| #1192632 (Received by flhurricane at: 11:06 AM 07.Aug.2024) TCPAT4 BULLETIN Tropical Storm Debby Advisory Number 21 NWS National Hurricane Center Miami FL AL042024 1100 AM EDT Wed Aug 07 2024 ...DEBBY A LITTLE STRONGER... ...DANGEROUS FLOOD THREAT CONTINUES FOR PORTIONS OF THE CAROLINAS... SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...32.3N 79.2W ABOUT 55 MI...85 KM SE OF CHARLESTON SOUTH CAROLINA ABOUT 100 MI...160 KM S OF MYRTLE BEACH SOUTH CAROLINA MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...995 MB...29.39 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Storm Surge Watch from north of South Santee River, South Carolina to Cape Fear, North Carolina is discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * North of the Savannah River to Surf City, North Carolina A Tropical Storm Watch is in effect for... * North of Surf City, North Carolina to Beaufort Inlet, North Carolina A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. Interests elsewhere along the southeastern coast of the United States should monitor the progress of this system. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM EDT (1500 UTC), the center of Tropical Storm Debby was located near latitude 32.3 North, longitude 79.2 West. Debby is moving toward the northeast near 5 mph (7 km/h) A generally northward motion is expected later today, bringing the center to the South Carolina coast by tonight or early Thursday. A faster motion toward the north and north-northeast across the Carolinas and the U.S. Mid-Atlantic states is expected on Thursday and Friday. Maximum sustained winds have increased to near 60 mph (95 km/h) with higher gusts. Some additional strengthening is possible today or tonight before the center of Debby reaches the coast of South Carolina. Weakening is forecast to begin on Thursday after the center moves inland. Debby is expected to merge with a frontal boundary over the U.S. Mid-Atlantic states on Friday. Tropical-storm-force winds extend outward up to 185 miles (295 km) from the center. The estimated minimum central pressure is 995 mb (29.39 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Debby can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC. WIND: Tropical storm conditions are expected to continue along the coast of South Carolina within the tropical storm warning area through Thursday. Tropical storm conditions are expected within the tropical storm warning area and possible within the tropical storm watch area in North Carolina today and continuing through Thursday. STORM SURGE: The combination of storm surge and tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... South Santee River to Ocracoke Inlet including the Neuse and Pamlico Rivers...1 to 3 ft For a complete depiction of areas at risk of storm surge inundation, please see the National Weather Service Peak Storm Surge Graphic, available at hurricanes.gov/graphics_at4.shtml?peakSurge. RAINFALL: Debby is expected to produce an additional 3 to 9 inches of rainfall with locally higher amounts, leading to maximum storm total amounts as high as 25 inches in South Carolina and 15 inches in southeast North Carolina, broadening the area of considerable flooding across portions of South Carolina and southeast North Carolina through Friday. An additional 1 to 2 inches of rainfall with locally higher amounts is possible across southeast Georgia through Thursday, bringing overall storm total amounts as high as 15 inches, which may aggravate any ongoing flooding conditions. From the Piedmont of South Carolina northward across portions of Virginia, 3 to 7 inches with local amounts to 10 inches, are expected through Friday. This rainfall will likely result in areas of considerable flash and urban flooding, with river flooding possible. From Maryland north through Upstate New York and Vermont, 2 to 4 inches, with local amounts to 6 inches, are expected through Saturday morning. This will likely produce considerable flash and urban flooding as well as river flooding. For a complete depiction of forecast rainfall and flash flooding associated with Debby, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_at4.shtml?rainqpf and the Flash Flood Risk graphic at hurricanes.gov/graphics_at4.shtml?ero. For a list of rainfall observations (and wind reports) associated this storm, see the companion storm summary at WBCSCCNS4 with the WMO header ACUS44 KWBC or at the following link: www.wpc.ncep.noaa.gov/discussions/nfdscc4.html. TORNADOES: A tornado or two may occur over eastern North Carolina and extreme eastern South Carolina through tonight. SURF: Large swells will continue to affect the Southeast U.S. coast through the end of the week. These conditions are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM EDT. Next complete advisory at 500 PM EDT. $$ Forecaster Pasch |
