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Hurricane Sam Public Advisory Number 34

2021-10-01 04:43:45| National Hurricane Center (Atlantic)

Issued at 1100 PM AST Thu Sep 30 2021 000 WTNT33 KNHC 010243 TCPAT3 BULLETIN Hurricane Sam Advisory Number 34 NWS National Hurricane Center Miami FL AL182021 1100 PM AST Thu Sep 30 2021 ...SAM STILL A POWERFUL 145 MPH HURRICANE... ...DANGEROUS SURF EXPECTED FOR A LARGE PORTION OF THE WESTERN ATLANTIC SHORELINE... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...25.0N 61.2W ABOUT 550 MI...885 KM SSE OF BERMUDA MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H PRESENT MOVEMENT...NNW OR 345 DEGREES AT 16 MPH...26 KM/H MINIMUM CENTRAL PRESSURE...938 MB...27.70 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Bermuda A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Hurricane Sam was located near latitude 25.0 North, longitude 61.2 West. Sam is moving toward the north-northwest near 16 mph (26 km/h) and this motion with an slight increase in forward speed is expected tonight. A turn toward the north is anticipated on Friday, and a northeastward motion is forecast to begin on Saturday. On the forecast track, the core of Sam will pass to the east of Bermuda early Saturday. Maximum sustained winds remain near 145 mph (230 km/h) with higher gusts. Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some fluctuations in intensity are expected during the next day or so, followed by gradual weakening. Sam is forecast to remain a major hurricane into Saturday, with additional weakening forecast later in the weekend. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). The estimated minimum central pressure is 938 mb (27.70 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the web at hurricanes.gov/graphics_at3.shtml?key_messages. WIND: Tropical storm conditions are expected on Bermuda beginning Friday night or early Saturday. SURF: Swells generated by Sam will impact the northern Leeward Islands and the Greater Antilles, including Puerto Rico, during the next few days. Swells are expected to reach Bermuda and the Bahamas tomorrow, and then spread to the United States east coast by this weekend. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 AM AST. Next complete advisory at 500 AM AST. $$ Forecaster Papin

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