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Hurricane Michael Public Advisory Number 14A
2018-10-10 07:56:02| National Hurricane Center (Atlantic)
Issued at 100 AM CDT Wed Oct 10 2018 000 WTNT34 KNHC 100555 TCPAT4 BULLETIN Hurricane Michael Intermediate Advisory Number 14A NWS National Hurricane Center Miami FL AL142018 100 AM CDT Wed Oct 10 2018 ...MICHAEL BECOMES AN EXTREMELY DANGEROUS CATEGORY 4 HURRICANE... ...LIFE-THREATENING STORM SURGE...HURRICANE FORCE WINDS...AND HEAVY RAINFALL EXPECTED ALONG THE NORTHEASTERN GULF COAST... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...27.7N 86.6W ABOUT 180 MI...290 KM SSW OF PANAMA CITY FLORIDA ABOUT 170 MI...275 KM SW OF APALACHICOLA FLORIDA MAXIMUM SUSTAINED WINDS...130 MPH...210 KM/H PRESENT MOVEMENT...N OR 355 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...945 MB...27.91 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Okaloosa/Walton County Line Florida to Anclote River Florida A Storm Surge Watch is in effect for... * Anclote River Florida to Anna Maria Island Florida, including Tampa Bay * Alabama/Florida border to Okaloosa/Walton County Line Florida A Hurricane Warning is in effect for... * Alabama/Florida border to Suwannee River Florida A Tropical Storm Warning is in effect for... * Alabama/Florida border to the Mississippi/Alabama border * Suwanee River Florida to Chassahowitzka Florida * north of Fernandina Beach Florida to South Santee River South Carolina A Tropical Storm Watch is in effect for... * Chassahowitzka to Anna Maria Island Florida, including Tampa Bay * Mississippi/Alabama border to the Mouth of the Pearl River * South Santee River South Carolina to Duck North Carolina * Pamlico and Albemarle Sounds A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours 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, in this case within the next 24 hours. 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, in this case during the next 12 hours. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. Interests elsewhere across the southeastern United States should monitor the progress of Michael. 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 100 AM CDT (0600 UTC), the center of Hurricane Michael was located near latitude 27.7 North, longitude 86.6 West. Michael is moving toward the north near 12 mph (19 km/h). A northward motion is expected this morning, followed by a northeastward motion later today and Thursday. On the forecast track, the center of Michael will move across the northeastern Gulf of Mexico this morning. The center of Michael's eye is then expected to move inland over the Florida Panhandle or Florida Big Bend area later today, move northeastward across the southeastern United States tonight and Thursday, and then move off the Mid-Atlantic coast away from the United States on Friday. Data from Air Force Reserve and NOAA Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 130 mph (210 km/h) with higher gusts. Michael is now a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some additional strengthening is possible today before Michael makes landfall in the Florida Panhandle or the Florida Big Bend area. Weakening is expected after landfall as Michael moves across the southeastern United States. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 175 miles (280 km). The minimum central pressure estimated from Air Force Hurricane Hunter data is 945 mb (27.91 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 if peak surge occurs at the time of high tide... Mexico Beach FL to Keaton Beach FL...9-13 ft Okaloosa/Walton County Line FL to Mexico Beach FL...6-9 ft Keaton Beach FL to Cedar Key FL...6-9 ft Cedar Key FL to Chassahowitzka FL...4-6 ft Chassahowitzka to Anna Maria Island FL including Tampa Bay...2-4 ft Alabama/Florida border to Okaloosa/Walton County Line FL...2-4 ft WIND: Hurricane conditions are expected within the hurricane warning area along the U.S. Gulf Coast today, with tropical storm conditions expected during the next several hours. Hurricane conditions will also spread well inland across portions of the Florida Panhandle, southeastern Alabama and southwestern Georgia. Tropical storm conditions are expected in the tropical storm warning area this morning, and are possible within the tropical storm watch area by that time. Hurricane conditions are possible within the hurricane watch area today. Tropical storm conditions are expected in the warning area along the southeast U.S. coast later today, and possible in the watch area by tonight. RAINFALL: Michael is expected to produce the following rainfall amounts through Friday... Florida Panhandle and Big Bend, southeast Alabama, and portions of southwest and central Georgia...4 to 8 inches, with isolated maximum amounts of 12 inches. This rainfall could lead to life threatening flash floods. The remainder of Georgia, the Carolinas, and southern Virginia...3 to 6 inches, with isolated maximum amounts of 8 inches. This rainfall could lead to life-threatening flash floods. Florida Peninsula, eastern Mid Atlantic, southern New England coast...1-3 inches. SURF: Swells generated by Michael are affecting the coasts of the eastern and northern Gulf of Mexico, and will spread to portions of the northwestern and western Gulf of Mexico coast during the next day or so. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: The threat for tornadoes will increase today into over parts of the Florida Panhandle, the northern Florida Peninsula, and southern Georgia. NEXT ADVISORY ------------- Next complete advisory at 400 AM CDT. $$ Forecaster Beven
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