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| #927559 (Received by flhurricane at: 4:45 PM 28.May.2018) TCPAT1 BULLETIN Subtropical Storm Alberto Advisory Number 15 NWS National Hurricane Center Miami FL AL012018 400 PM CDT Mon May 28 2018 ...CENTER OF ALBERTO MAKING LANDFALL NEAR LAGUNA BEACH FLORIDA... ...HEAVY RAINFALL AND FLASH FLOODING OCCURRING OVER PARTS OF THE FLORIDA PANHANDLE... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...30.3N 85.9W ABOUT 15 MI...20 KM WNW OF PANAMA CITY FLORIDA MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...N OR 355 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: All watches and warnings east of the Aucilla River have been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Watch is in effect for... * Aucilla River to Mexico Beach A Tropical Storm Warning is in effect for... * Aucilla River to the Alabama/Florida 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. 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 400 PM CDT (2100 UTC), the center of Subtropical Storm Alberto was located near latitude 30.3 North, longitude 85.9 West. The storm is moving toward the north near 9 mph (15 km/h). A faster northward to north-northwestward motion is expected during the next few days. On the forecast track, the center of Alberto will move over Alabama later tonight and Tuesday. The system is forecast to move over the Tennessee Valley on Tuesday and into the Ohio Valley and Great Lakes region on Wednesday and Thursday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Steady weakening is forecast as Alberto moves inland, and Alberto is expected to become a subtropical depression tonight or early Tuesday, and degenerate into a remnant low by Tuesday afternoon. Winds of 40 mph extend outward up to 90 miles (150 km) from the center. The official observing site at Panama City recently reported a sustained wind of 40 mph (65 km/h) and a gust to 59 mph (95 km/h). An automated weather station near St. Andrew Bay measured a sustained wind of 44 mph (70 km/h) with a gust to 52 mph (83 km/h) within the past couple of hours. The estimated minimum central pressure is 994 mb (29.36 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Alberto is expected to produce the following rain accumulations through Tuesday: The Florida panhandle across eastern and central Alabama and western Georgia...4 to 8 inches, isolated 12 inches. The Florida Keys and Florida peninsula...Additional 1 to 2 inches, isolated 5 inches. Rest of the Southeast and Tennessee Valley into the lower mid Atlantic from Tennessee east through the Carolinas...2 to 6 inches. Flooding and flash flooding are possible in the southeast United States, including Florida. WIND: Tropical storm conditions will continue within portions of the warning area into 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... Acuilla River to Mexico Beach...1 to 3 ft A National Ocean Service tide gauge at Apalachicola measured a water level of 2.99 ft above Mean Higher High Water earlier this afternoon. 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: Isolated tornadoes are possible through tonight over parts of Georgia and southeast Alabama. SURF: Swells generated by Alberto will continue to 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 intermediate advisory at 700 PM CDT. Next complete advisory at 1000 PM CDT. $$ Forecaster Brown |
