|
Show Selection: |
| #1063912 (Received by flhurricane at: 1:56 PM 30.Sep.2021) TCPAT3 BULLETIN Hurricane Sam Intermediate Advisory Number 32A NWS National Hurricane Center Miami FL AL182021 200 PM AST Thu Sep 30 2021 ...SAM MAINTAINING CATEGORY 4 INTENSITY... ...EXPECTED TO BRING DANGEROUS HIGH SURF TO A LARGE PORTION OF THE WESTERN ATLANTIC SHORELINE... SUMMARY OF 200 PM AST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...23.1N 60.5W ABOUT 685 MI...1105 KM SSE OF BERMUDA MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...941 MB...27.79 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * Bermuda A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 PM AST (1800 UTC), the eye of Hurricane Sam was located by an Air Force Hurricane Hunter aircraft near latitude 23.1 North, longitude 60.5 West. Sam is moving toward the northwest near 13 mph (20 km/h), and a turn toward the north-northwest with an increase in forward speed is expected tonight. A turn toward the north is anticipated by late 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 are 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 through 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 minimum central pressure measured by the Air Force Hurricane Hunters is 941 mb (27.79 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 possible 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 500 PM AST. $$ Forecaster Pasch |