463 WTNT33 KNHC 032034 TCPAT3 BULLETIN Hurricane Sam Advisory Number 45 NWS National Hurricane Center Miami FL AL182021 500 PM AST Sun Oct 03 2021 ...SAM EXPANDING OVER THE OPEN NORTH ATLANTIC... ...EXPECTED TO BECOME A LARGE AND POWERFUL POST-TROPICAL LOW PRESSURE SYSTEM ON MONDAY... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...38.6N 52.8W ABOUT 560 MI...900 KM S OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...ENE OR 60 DEGREES AT 16 MPH...26 KM/H MINIMUM CENTRAL PRESSURE...964 MB...28.47 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 PM AST (2100 UTC), the center of Hurricane Sam was located near latitude 38.6 North, longitude 52.8 West. Sam is moving toward the east-northeast near 16 mph (26 km/h). A northeastward motion at a faster forward speed is expected over the next couple of days. The cyclone is forecast to slow down over the north Atlantic around midweek. Maximum sustained winds are near 100 mph (155 km/h) with higher gusts. Gradual weakening is forecast during the next few days, and Sam is expected to transition into a powerful post-tropical cyclone by late Monday. Sam is a large tropical cyclone. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 240 miles (390 km). The estimated minimum central pressure is 964 mb (28.47 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, the Bahamas, the eastern United States and Atlantic Canada for the next couple of days. 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 Latto