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| #927392 (Received by flhurricane at: 1:45 PM 27.May.2018) TCPAT1 BULLETIN Subtropical Storm Alberto Intermediate Advisory Number 9A NWS National Hurricane Center Miami FL AL012018 200 PM EDT Sun May 27 2018 ...ALBERTO CONTINUES TO MOVE NORTHWARD OVER THE EASTERN GULF OF MEXICO... SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...27.7N 84.7W ABOUT 135 MI...220 KM W OF TAMPA FLORIDA ABOUT 140 MI...225 KM S OF APALACHICOLA FLORIDA MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning along the west coast of Florida has been discontinued south of the Middle of Longboat Key. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Crystal River to the Florida/Alabama border A Tropical Storm Warning is in effect for... * Middle of Longboat Key to the Mississippi/Alabama border 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. 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. 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 PM EDT (1800 UTC), the center of Subtropical Storm Alberto was located near latitude 27.7 North, longitude 84.7 West. The storm is moving toward the north near 13 mph (20 km/h). A turn toward the north-northwest at a slower forward speed is forecast to occur later today or tonight. A north-northwestward to northward motion is expected Monday through 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 are near 50 mph (85 km/h) with higher gusts. Some additional strengthening is forecast before the system reaches the northern Gulf Coast. Steady weakening is expected after landfall, and Alberto is forecast to become a tropical depression by Monday night or Tuesday. Winds of 40 mph extend outward up to 125 miles (205 km) primarily to the east of the center. The latest minimum central pressure reported by an Air Force Reserve reconnaissance aircraft is 994 mb (29.36 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 will spread northward in the warning area along the west coast of Florida today and will reach the warning area along the northern Gulf Coast by this evening. 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 Florida/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 500 PM EDT. $$ Forecaster Brown |
