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Hurricane Sam Public Advisory Number 33A
2021-10-01 01:43:08| National Hurricane Center (Atlantic)
Issued at 800 PM AST Thu Sep 30 2021 000 WTNT33 KNHC 302343 TCPAT3 BULLETIN Hurricane Sam Intermediate Advisory Number 33A NWS National Hurricane Center Miami FL AL182021 800 PM AST Thu Sep 30 2021 ...POWERFUL HURRICANE SAM NOW MOVING NORTH-NORTHWEST... ...DANGEROUS SURF EXPECTED FOR A LARGE PORTION OF THE WESTERN ATLANTIC SHORELINE... SUMMARY OF 800 PM AST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...24.3N 61.0W ABOUT 600 MI...965 KM SSE OF BERMUDA MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H PRESENT MOVEMENT...NNW OR 340 DEGREES AT 14 MPH...22 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 800 PM AST (0000 UTC), the eye of Hurricane Sam was located near latitude 24.3 North, longitude 61.0 West. Sam is moving toward the north-northwest near 14 mph (22 km/h), and this continued motion with an additional 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 couple of days, but Sam is forecast to remain a major hurricane into Saturday, with more significant weakening anticipated 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 by Friday, 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 complete advisory at 1100 PM AST. $$ Forecaster Papin
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