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Potential Tropical Cyclone Seven Public Advisory Number 2A
2018-09-03 07:32:53| National Hurricane Center (Atlantic)
Issued at 200 AM EDT Mon Sep 03 2018 288 WTNT32 KNHC 030532 TCPAT2 BULLETIN Potential Tropical Cyclone Seven Intermediate Advisory Number 2A NWS National Hurricane Center Miami FL AL072018 200 AM EDT Mon Sep 03 2018 ...DISTURBANCE CONTINUES TO MOVE QUICKLY WEST-NORTHWESTWARD... ...BRINGING HEAVY RAINS TO PORTIONS OF SOUTH FLORIDA... SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...24.0N 79.4W ABOUT 115 MI...190 KM ESE OF MARATHON FLORIDA MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...WNW OR 300 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...1012 MB...29.89 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Mississippi-Alabama border westward to the Mouth of the Mississippi River A Tropical Storm Watch is in effect for... * Alabama-Florida border westward to east of Morgan City, Louisiana, including Lake Pontchartrain and Lake Maurepas Interests in the Florida Keys and the southern Florida peninsula 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 200 AM EDT (0600 UTC), the disturbance was centered near latitude 24.0 North, longitude 79.4 West. The system is moving toward the west-northwest near 15 mph (24 km/h), and this general motion is expected to continue through Wednesday. On the forecast track, the disturbance will pass over the Florida Keys or the southern portion of the Florida peninsula today, move over the southeastern Gulf of Mexico by this evening, and reach the central Gulf Coast by late Tuesday or Tuesday night. Maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Gradual strengthening is forecast during the next 48 hours, and the disturbance is forecast to become a tropical storm by tonight. Conditions appear to be conducive for development, and this system is expected to become a tropical cyclone by tonight. * Formation chance through 48 hours...high...80 percent * Formation chance through 5 days...high...80 percent The estimated minimum central pressure is 1012 mb (29.89 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... Destin Florida to the Mississippi-Alabama border...1 to 2 ft. Mississippi-Alabama border to the Mouth of Mississippi River...2 to 4 ft Mouth of the Mississippi River to the Louisiana-Texas border...1 to 2 ft. The deepest water will occur along the immediate coast near and to the east of the landfall location, 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. RAINFALL: The disturbance is expected to produce total rain accumulations of 2 to 4 inches over the central and northwestern Bahamas, the Florida Keys, and South Florida through early Tuesday. Isolated maximum amounts of 8 inches are possible over the southern Florida peninsula. This rainfall may cause flooding. The disturbance is expected to produce heavy rainfall along the central Gulf Coast of the United States by the middle of the week. WIND: Tropical storm conditions are possible within the watch area by late Tuesday. Tropical-storm-force wind gusts will be possible today across portions of South Florida and the Florida Keys. NEXT ADVISORY ------------- Next complete advisory at 500 AM EDT. $$ Forecaster Pasch
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