000 WTNT33 KNHC 040232 TCPAT3 BULLETIN Hurricane Sam Advisory Number 46 NWS National Hurricane Center Miami FL AL182021 1100 PM AST Sun Oct 03 2021 ...SAM SLIGHTLY RE-STRENGTHENS OVER THE GULF STREAM... ...EXPECTED TO BECOME POST-TROPICAL BY EARLY TUESDAY... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...39.3N 51.2W ABOUT 520 MI...835 KM S OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NE OR 50 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...957 MB...28.26 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the eye of Hurricane Sam was located near latitude 39.3 North, longitude 51.2 West. Sam is moving toward the northeast near 20 mph (31 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 far north Atlantic southwest of Iceland around midweek. Satellite images indicate that maximum sustained winds have increased to near 105 mph (165 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 early Tuesday. Hurricane-force winds extend outward up to 70 miles (110 km) from the center and tropical-storm-force winds extend outward up to 240 miles (390 km). The estimated minimum central pressure is 957 mb (28.26 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 500 AM AST. $$ Forecaster Blake