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| #1109915 (Received by flhurricane at: 7:59 AM 30.Sep.2022) TCPAT4 BULLETIN Hurricane Ian Intermediate Advisory Number 31A NWS National Hurricane Center Miami FL AL092022 800 AM EDT Fri Sep 30 2022 ...TROPICAL-STORM-FORCE WINDS ONGOING ACROSS MUCH OF THE COAST OF THE CAROLINAS... ...LIFE-THREATENING STORM SURGE AND HURRICANE CONDITIONS EXPECTED BY THIS AFTERNOON... SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...31.4N 79.1W ABOUT 105 MI...175 KM SSE OF CHARLESTON SOUTH CAROLINA ABOUT 185 MI...295 KM SSW OF CAPE FEAR NORTH CAROLINA MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...N OR 5 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...984 MB...29.06 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Flagler/Volusia County Line Florida to Cape Fear North Carolina * Neuse River North Carolina * St. Johns River Florida A Hurricane Warning is in effect for... * Savannah River to Cape Fear North Carolina A Tropical Storm Warning is in effect for... * Altamaha Sound Georgia to Savannah River * Cape Fear to Duck North Carolina * Pamlico Sound A Storm Surge Watch is in effect for... * North of Cape Fear to Duck North Carolina * Pamlico River * Cape Fear River A Hurricane Watch is in effect for... * East of Cape Fear to Surf City North Carolina A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline, in the indicated locations. A Hurricane Watch means that hurricane conditions are possible within the watch area. 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 800 AM EDT (1200 UTC), the center of Hurricane Ian was located near latitude 31.4 North, longitude 79.1 West. Ian is moving toward the north near 9 mph (15 km/h). This general motion with an increase in forward speed is expected this morning, followed by a turn toward the north-northwest by tonight. On the forecast track, the center of Ian will approach and reach the coast of South Carolina today, and then move farther inland across eastern South Carolina and central North Carolina tonight and Saturday. Maximum sustained winds remain near 85 mph (140 km/h) with higher gusts. Little change in strength is expected before Ian reaches the coast later today. Rapid weakening is expected after landfall, and Ian is forecast to become an extratropical low over North Carolina tonight or on Saturday. The low is then expected to dissipate by Saturday night. Hurricane-force winds extend outward up to 70 miles (110 km) from the center and tropical-storm-force winds extend outward up to 485 miles (780 km). A sustained wind of 40 mph (65 km/h) and a gust to 58 mph (93 km/h) were recently reported at a WeatherFlow station on Fort Sumter Range Front Light in South Carolina. The estimated minimum central pressure is 984 mb (29.06 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ian can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC and on the web at hurricanes.gov/text/MIATCDAT4.shtml. STORM SURGE: The combination of storm surge and the 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... * Edisto Beach to Little River Inlet...4-7 ft * Little River Inlet to Cape Fear...3-5 ft * Savannah River to Edisto Beach...3-5 ft * Flagler/Volusia County Line to Savannah River...2-4 ft * Cape Fear River...2-4 ft * St. Johns River...2-4 ft * East of Cape Fear to Duck, including Pamlico and Neuse Rivers...2-4 ft * Patrick Air Force Base to Flagler/Volusia County Line... 1-3 ft * Albemarle Sound...1-2 ft The deepest water will occur along the immediate coast near and to the right of the center, where the surge will be accompanied by large waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Tropical storm conditions are occurring in parts of the warning areas on the coasts of Georgia and the Carolinas, and hurricane conditions are expected to begin in the Hurricane Warning area in South Carolina and southeastern North Carolina by this afternoon. Hurricane conditions are possible within the Hurricane Watch area in North Carolina by this afternoon. RAINFALL: Ian is expected to produce the following storm total rainfall: * Northeast South Carolina: 4 to 8 inches, with local maxima of 12 inches. * Central South Carolina, North Carolina, and southern Virginia: 3 to 6 inches with local maxima of 8 inches across northwest North Carolina and southwest Virginia. Major to record river flooding will continue across central Florida through next week. Considerable flash and urban flooding, and minor river flooding is possible across coastal and northeast South Carolina today. Locally considerable flash, urban, and small stream flooding is possible today into Saturday across portions of northwest North Carolina and southwest Virginia. Limited flooding is possible across portions of the southern Mid-Atlantic this weekend. TORNADOES: A few tornadoes are possible this afternoon and evening across eastern North Carolina, shifting northward into southeast Virginia overnight through early Saturday morning. SURF: Swells generated by Ian and a nearby frontal system are affecting the east coast of Florida, Georgia, the Carolinas, and the northwestern Bahamas. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. Swells will subside along the northern coast of Cuba and the northeastern coast of the Yucatan peninsula today. NEXT ADVISORY ------------- Next complete advisory at 1100 AM EDT. $$ Forecaster Blake |
