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Hurricane Florence Public Advisory Number 58
2018-09-13 22:33:22| National Hurricane Center (Atlantic)
Issued at 500 PM EDT Thu Sep 13 2018 705 WTNT31 KNHC 132033 TCPAT1 BULLETIN Hurricane Florence Advisory Number 58 NWS National Hurricane Center Miami FL AL062018 500 PM EDT Thu Sep 13 2018 ...HURRICANE-FORCE WINDS GETTING CLOSER TO THE NORTH CAROLINA OUTER BANKS AND COASTAL SOUTHEASTERN NORTH CAROLINA... ...LIFE-THREATENING STORM SURGE AND RAINFALL EXPECTED... SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...33.7N 76.2W ABOUT 100 MI...160 KM ESE OF WILMINGTON NORTH CAROLINA ABOUT 155 MI...250 KM E OF MYRTLE BEACH SOUTH CAROLINA MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...WNW OR 295 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...955 MB...28.20 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Tropical Storm Warning has been issued from south of South Santee River to Edisto Beach, South Carolina. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * South Santee River South Carolina to Duck North Carolina * Albemarle and Pamlico Sounds, including the Neuse and Pamlico Rivers A Storm Surge Watch is in effect for... * Edisto Beach South Carolina to South Santee River South Carolina * North of Duck North Carolina to the North Carolina/Virginia border A Hurricane Warning is in effect for... * South Santee River South Carolina to Duck North Carolina * Albemarle and Pamlico Sounds A Hurricane Watch is in effect for... * Edisto Beach South Carolina to South Santee River South Carolina A Tropical Storm Warning is in effect for... * North of Duck North Carolina to Cape Charles Light Virginia * Chesapeake Bay south of New Point Comfort * Edisto Beach South Carolina to South Santee River South Carolina Interests elsewhere in the southeastern and mid-Atlantic states should monitor the progress of Florence. A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next 12 to 24 hours. A Hurricane Watch means that hurricane conditions are possible within the watch area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning 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 500 PM EDT (2100 UTC), data from NOAA Doppler weather radars indicate that the center of the eye of Florence was located near latitude 33.7 North, longitude 76.2 West. Florence is moving toward the west-northwest near 5 mph (7 km/h), and this general motion is forecast to continue into Friday. A slow westward to west- southwestward motion is expected Friday night and Saturday. On the forecast track, the center of Florence will approach the coasts of North and South Carolina later tonight, then move near or over the coast of southern North Carolina and northeastern South Carolina in the hurricane warning area on Friday. A slow motion across portions of eastern and central South Carolina is forecast Friday night through Saturday night. Doppler radar data indicate that maximum sustained winds have decreased to near 100 mph (155 km/h) with higher gusts. Little change in strength is expected before the eye of Florence reaches the coast, with slow weakening expected after the center moves inland or meanders near the coast. More significant weakening is forecast on Saturday as Florence moves farther inland over central South Carolina. Hurricane-force winds extend outward up to 80 miles (130 km) from the center and tropical-storm-force winds extend outward up to 195 miles (315 km). A NOAA reporting station at Cape Lookout, North Carolina, recently reported a sustained wind of 68 mph (109 km/h) and a gust to 85 mph (137 km/h). The estimated minimum central pressure is 955 mb (28.20 inches). HAZARDS AFFECTING LAND ---------------------- STORM SURGE: The combination of a dangerous 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 has the potential to reach the following heights above ground... Cape Fear NC to Cape Lookout NC...7-11 ft, with locally higher amounts in the Neuse, Pamlico, Pungo, and Bay Rivers Cape Lookout NC to Ocracoke Inlet NC...6-9 ft South Santee River SC to Cape Fear NC...4-6 ft Ocracoke Inlet NC to Salvo NC...4-6 ft Salvo NC to North Carolina/Virginia Border...2-4 ft Edisto Beach SC to South Santee River SC...2-4 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and destructive waves. Surge-related flooding can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. RAINFALL: Florence is expected to produce heavy and excessive rainfall in the following areas... Southeastern coastal North Carolina into far northeastern South Carolina...20 to 30 inches, isolated 40 inches. This rainfall will produce catastrophic flash flooding and prolonged significant river flooding. Remainder of South Carolina and North Carolina into southwest Virginia...6 to 12 inches, isolated 15 inches. This rainfall will produce life-threatening flash flooding. WIND: Hurricane conditions are expected to reach the coast within the hurricane warning area this evening or early Friday. Tropical storm conditions are already moving onshore within the warning area. TORNADOES: A few tornadoes are possible in eastern and southeastern North Carolina through Friday. SURF: Swells generated by Florence are affecting Bermuda, portions of the U.S. East Coast, and the northwestern and central Bahamas. These swells 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 800 PM EDT. Next complete advisory at 1100 PM EDT. $$ Forecaster Stewart
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