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Subtropical Storm Alberto Public Advisory Number 8A
2018-05-27 13:49:47| National Hurricane Center (Atlantic)
Issued at 800 AM EDT Sun May 27 2018 000 WTNT31 KNHC 271149 TCPAT1 BULLETIN Subtropical Storm Alberto Intermediate Advisory Number 8A NWS National Hurricane Center Miami FL AL012018 800 AM EDT Sun May 27 2018 ...SLIGHTLY STRONGER ALBERTO MOVING A LITTLE FASTER NORTHWARD OVER THE EASTERN GULF OF MEXICO... SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...26.3N 84.4W ABOUT 165 MI...265 KM SW OF TAMPA FLORIDA ABOUT 240 MI...385 KM S OF APALACHICOLA FLORIDA MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...N OR 010 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Crystal River to the Mississippi/Alabama border A Tropical Storm Warning is in effect for... * Dry Tortugas * Bonita Beach to the Mississippi/Alabama border A Tropical Storm Watch is in effect for... * Mississippi/Alabama border to the Mouth of the Pearl River 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 in this case during the next 36 hours. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. A Tropical Storm Watch means that tropical storm conditions are possible somewhere within the watch area. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM EDT (1200 UTC), the center of Subtropical Storm Alberto was located near latitude 26.3 North, longitude 84.4 West. The storm is moving toward the north near 15 mph (24 km/h). A turn toward the north-northwest at a slower forward speed is forecast tonight. A north-northwestward to northward motion is expected Tuesday through early Wednesday. On the forecast track, the center of Alberto will cross the eastern and northern Gulf of Mexico today and approach the northern Gulf Coast in the warning area tonight or Monday. Heavy rainfall and tropical storm conditions will likely reach the northern Gulf Coast well before the arrival of the center of Alberto. Alberto is expected to move northward into the Tennessee Valley on Tuesday and Wednesday. Maximum sustained winds have increased to near 45 mph (75 km/h) with higher gusts. Gradual strengthening is forecast until the system reaches the northern Gulf Coast. Steady weakening is expected after Alberto makes landfall, and it is forecast to become a tropical depression by Monday night or Tuesday. Winds of 40 mph extend outward up to 150 miles (240 km) mainly to the east of the center. The estimated minimum central pressure based on data from an Air Force Reserve reconnaissance aircraft data is 997 mb (29.44 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Alberto is expected to produce the following rain accumulations through Tuesday: Central Cuba...Additional 5 to 10 inches, isolated storm totals of 20 inches. The Florida panhandle into eastern Alabama and western Georgia...4 to 8 inches, isolated 12 inches. The Florida Keys and south Florida...Additional 3 to 6 inches, isolated storm totals of 10 inches. Rest of the Florida peninsula...1 to 4 inches. Rest of the southeast U.S. from Tennessee to the Carolinas...2 to 6 inches. Rains in Cuba could produce life-threatening flash floods and mudslides. Flooding and flash flooding are possible in the southeast United States, including Florida. WIND: Tropical storm conditions are occurring in the Dry Tortugas, and these conditions are expected to spread northward in the warning area along the west coast of Florida today. Tropical storm conditions are expected within the warning area along the northern Gulf Coast by later today. Tropical storm conditions are possible in the watch area along the northern Gulf Coast by Monday. 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... Crystal River to the Mississippi/Alabama border...2 to 4 ft The deepest water will occur along the immediate coast. 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. TORNADOES: A few tornadoes are possible across the Florida peninsula today. SURF: Swells generated by Alberto will affect the eastern and northern Gulf Coast through Tuesday. These swells are likely to cause life-threatening surf and rip current conditions. For more information, consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 AM EDT. $$ Forecaster Brown
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