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| #1064569 (Received by flhurricane at: 10:39 PM 04.Oct.2021) TCPAT3 BULLETIN Hurricane Sam Advisory Number 50 NWS National Hurricane Center Miami FL AL182021 300 AM GMT Tue Oct 05 2021 ...SAM STILL A HURRICANE BUT EXPECTED TO TRANSITION INTO A POWERFUL POST-TROPICAL CYCLONE SOON... SUMMARY OF 300 AM GMT...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...47.7N 40.2W ABOUT 610 MI...980 KM E OF CAPE RACE NEWFOUNDLAND ABOUT 1330 MI...2140 KM SW OF REYKJAVIK ICELAND MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...NNE OR 30 DEGREES AT 29 MPH...46 KM/H MINIMUM CENTRAL PRESSURE...965 MB...28.50 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 300 AM GMT (0300 UTC), the center of Hurricane Sam was located near latitude 47.7 North, longitude 40.2 West. Sam is moving toward the north-northeast near 29 mph (46 km/h). This general motion should continue overnight with a decrease in forward speed. A slow east-northeastward motion is forecast to begin by late today, and a northeastward motion is expected Wednesday and Wednesday night. Maximum sustained winds have decreased to near 85 mph (140 km/h) with higher gusts. Although gradual weakening is forecast during the next few days, Sam is expected to transition into a powerful post-tropical cyclone over the north Atlantic within the next 6-12 hours. Hurricane-force winds extend outward up to 80 miles (130 km) from the center and tropical-storm-force winds extend outward up to 460 miles (740 km). The estimated minimum central pressure is 965 mb (28.50 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. SURF: Swells generated by Sam will impact the northern Leeward Islands, the Greater Antilles, portions of the Bahamas, and southeastern Newfoundland through midweek. 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 900 AM GMT. $$ Forecaster Blake |
