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Potential Tropical Cyclone Sixteen Public Advisory Number 4A
2019-10-18 13:34:23| National Hurricane Center (Atlantic)
Issued at 700 AM CDT Fri Oct 18 2019 000 WTNT31 KNHC 181134 TCPAT1 BULLETIN Potential Tropical Cyclone Sixteen Intermediate Advisory Number 4A NWS National Hurricane Center Miami FL AL162019 700 AM CDT Fri Oct 18 2019 ...DANGEROUS STORM SURGE AND TROPICAL STORM FORCE WINDS EXPECTED ALONG PORTIONS OF THE NORTHERN GULF COAST LATER TODAY AND TONIGHT... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...25.1N 91.2W ABOUT 305 MI...490 KM SSW OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NE OR 50 DEGREES AT 21 MPH...33 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Mississippi/Alabama border to Yankeetown Florida * Grand Isle Louisiana to the Mouth of the Pearl River A Storm Surge Warning is in effect for... * Indian Pass Florida to Clearwater Beach Florida A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning. 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. 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 700 AM CDT (1200 UTC), the disturbance was centered near latitude 25.1 North, longitude 91.2 West. The system is moving toward the northeast near 21 mph (33 km/h), and this general motion is expected to continue for the next couple of days. On the forecast track, the system will approach the northern Gulf Coast later today and tonight, and then move inland over portions of the southeastern United States on Saturday and Saturday night. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. The disturbance is expected to develop into a tropical or subtropical storm today, and slow strengthening is anticipated until the system moves inland. An Air Force Reserve Hurricane Hunter aircraft is on its way to investigate the disturbance. * Formation chance through 48 hours...high...90 percent * Formation chance through 5 days...high...90 percent Tropical-storm-force winds extend outward up to 115 miles (185 km) to the north and east of the possible center. The estimated minimum central pressure is 1004 mb (29.65 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 could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Indian Pass FL to Chassahowitzka FL...3 to 5 ft Chassahowitzka to Clearwater Beach FL...2 to 4 ft 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 expected to first reach the coast within the warning area by later today, making outside preparations difficult or dangerous. Gale-force winds are possible along portions of the Atlantic coast of the southeastern United States by Saturday. RAINFALL: The disturbance is expected to produce total rainfall accumulations of 2 to 4 inches this weekend from the central Gulf Coast and northern and central Florida to the eastern Carolinas, with isolated maximum amounts of 6 inches. NEXT ADVISORY ------------- Next complete advisory at 1000 AM CDT. $$ Forecaster Brennan
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