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Subtropical Storm Alberto Public Advisory Number 6A
2018-05-27 01:57:36| National Hurricane Center (Atlantic)
Issued at 700 PM CDT Sat May 26 2018 000 WTNT31 KNHC 262357 TCPAT1 BULLETIN Subtropical Storm Alberto Intermediate Advisory Number 6A NWS National Hurricane Center Miami FL AL012018 700 PM CDT Sat May 26 2018 ...ALBERTO MOVING THROUGH THE SOUTHEASTERN GULF OF MEXICO... ...HEAVY RAINFALL CONTINUES TO SPREAD NORTHWARD OVER FLORIDA... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...23.4N 84.8W ABOUT 105 MI...170 KM N OF THE WESTERN TIP OF CUBA ABOUT 150 MI...240 KM SW OF THE DRY TORTUGAS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...N OR 10 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1002 MB...29.59 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 Mouth of the Pearl River A Tropical Storm Warning is in effect for... * Cuban province of Pinar del Rio * Dry Tortugas * Bonita Beach to Anclote River * Aucilla River 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 during the next 48 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 in the United States portion of that watch area within 48 hours. 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 700 PM CDT (0000 UTC), the center of Subtropical Storm Alberto was located near latitude 23.4 North, longitude 84.8 West. The storm is moving toward the north near 13 mph (20 km/h). A slower northward or north-northeastward motion is expected tonight, followed by a north-northwest turn on Sunday, and this general motion should continue into Tuesday. On the forecast track, the center of Alberto is forecast to move over the eastern Gulf of Mexico tonight through Sunday night, and approach the northern Gulf Coast in the warning area on Monday. Heavy rainfall and tropical storm conditions will likely reach the northern Gulf Coast well before the arrival of the center of Alberto. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Gradual strengthening is forecast until the system reaches the northern Gulf Coast on Monday. Winds of 40 mph extend outward up to 140 miles (220 km) primarily to the east of the center. Key West, Florida recently reported a wind gust of 43 mph (69 km/h). The minimum central pressure recently reported by an Air Force Reserve Hurricane Hunter aircraft is 1002 mb (29.59 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Alberto is expected to produce total rain accumulations of 10 to 15 inches with isolated totals of 25 inches across western Cuba. These rains could produce life-threatening flash floods and mudslides. Rainfall accumulations of 3 to 7 inches with maximum amounts of 10 inches are possible across the Florida Keys and southern and southwest Florida. Heavy rains will begin to affect the central Gulf Coast region into the southeastern United States on Sunday and continue into the middle of next week as Alberto moves northward after landfall. Rainfall totals of 5 to 10 inches with maximum amounts of 15 inches are possible along the track of Alberto from eastern Louisiana, across much of Mississippi, Alabama, western Tennessee and the western Florida panhandle. Rainfall totals of 3 to 5 inches with maximum totals of 8 inches are possible from the southern Appalachians into the coastal southeast United States. WIND: Tropical storm conditions are expected within portions of the warning area in Cuba through this evening. Tropical Storm conditions are expected in the Dry Tortugas and in the warning area along the west coast of Florida beginning Sunday. Tropical Storm conditions are expected within the warning area along the northern Gulf Coast by Sunday night. Tropical Storm conditions are possible in the watch area along the northern Gulf Coast by early 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 Mouth of the Pearl River...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: Isolated tornadoes are possible this evening and tonight across parts of west-central Florida, including the Keys. SURF: Swells generated by Alberto are expected to spread northward along the eastern and northern Gulf Coast through Monday. 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 1000 PM CDT. $$ Forecaster Beven
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