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Hurricane Sam Public Advisory Number 36

2021-10-01 16:51:49| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Fri Oct 01 2021 000 WTNT33 KNHC 011451 TCPAT3 BULLETIN Hurricane Sam Advisory Number 36 NWS National Hurricane Center Miami FL AL182021 1100 AM AST Fri Oct 01 2021 ...SAM REMAINS A POWERFUL CATEGORY 4 HURRICANE OVER THE CENTRAL ATLANTIC... ...CORE OF THE HURRICANE EXPECTED TO PASS WELL EAST OF BERMUDA TONIGHT... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...28.4N 61.8W ABOUT 325 MI...520 KM SE OF BERMUDA MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H PRESENT MOVEMENT...N OR 355 DEGREES AT 21 MPH...33 KM/H MINIMUM CENTRAL PRESSURE...936 MB...27.64 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 1100 AM AST (1500 UTC), the center of Hurricane Sam was located near latitude 28.4 North, longitude 61.8 West. Sam is moving toward the north near 21 mph (33 km/h). A turn toward the north-northeast, at a slightly slower forward speed, is expected by tonight, followed by a northeastward motion Saturday night through Monday. On the forecast track, the center of Sam will pass well to the east of Bermuda tonight. Maximum sustained winds remain near 150 mph (240 km/h) with higher gusts. Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Although fluctuations in intensity are still possible today, weakening is forecast during the next couple of days. However, Sam is expected to remain a major hurricane through at least Saturday night. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 205 miles (335 km). The estimated minimum central pressure is 936 mb (27.64 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 tonight or early Saturday. SURF: Swells generated by Sam will impact the northern Leeward Islands and the Greater Antilles, including Puerto Rico, during the next couple of days. Swells are expected to reach Bermuda and the Bahamas this afternoon, and then spread to the United States east coast and Atlantic Canada on Saturday. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Cangialosi/Nepaul

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Hurricane Sam Forecast Advisory Number 36

2021-10-01 16:50:49| National Hurricane Center (Atlantic)

Issued at 1500 UTC FRI OCT 01 2021 000 WTNT23 KNHC 011450 TCMAT3 HURRICANE SAM FORECAST/ADVISORY NUMBER 36 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 1500 UTC FRI OCT 01 2021 CHANGES IN WATCHES AND WARNINGS 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. HURRICANE CENTER LOCATED NEAR 28.4N 61.8W AT 01/1500Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE NORTH OR 355 DEGREES AT 18 KT ESTIMATED MINIMUM CENTRAL PRESSURE 936 MB MAX SUSTAINED WINDS 130 KT WITH GUSTS TO 160 KT. 64 KT....... 50NE 50SE 35SW 30NW. 50 KT....... 80NE 90SE 70SW 70NW. 34 KT.......150NE 180SE 130SW 130NW. 12 FT SEAS..270NE 240SE 210SW 210NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 28.4N 61.8W AT 01/1500Z AT 01/1200Z CENTER WAS LOCATED NEAR 27.6N 61.7W FORECAST VALID 02/0000Z 30.7N 61.5W MAX WIND 125 KT...GUSTS 150 KT. 64 KT... 50NE 50SE 35SW 30NW. 50 KT... 80NE 90SE 60SW 60NW. 34 KT...150NE 170SE 120SW 120NW. FORECAST VALID 02/1200Z 33.4N 60.2W MAX WIND 110 KT...GUSTS 135 KT. 64 KT... 50NE 50SE 35SW 30NW. 50 KT... 80NE 80SE 60SW 60NW. 34 KT...150NE 160SE 120SW 130NW. FORECAST VALID 03/0000Z 35.6N 58.4W MAX WIND 100 KT...GUSTS 120 KT. 64 KT... 40NE 50SE 35SW 40NW. 50 KT... 80NE 80SE 70SW 70NW. 34 KT...150NE 170SE 140SW 150NW. FORECAST VALID 03/1200Z 37.2N 56.0W MAX WIND 95 KT...GUSTS 115 KT. 64 KT... 50NE 50SE 40SW 40NW. 50 KT... 80NE 80SE 70SW 70NW. 34 KT...150NE 160SE 160SW 160NW. FORECAST VALID 04/0000Z 38.7N 52.9W MAX WIND 90 KT...GUSTS 110 KT. 50 KT... 70NE 90SE 80SW 70NW. 34 KT...160NE 180SE 180SW 180NW. FORECAST VALID 04/1200Z 41.9N 48.6W MAX WIND 85 KT...GUSTS 105 KT. 50 KT... 80NE 100SE 90SW 80NW. 34 KT...180NE 200SE 200SW 180NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 05/1200Z 49.0N 42.2W...POST-TROP/EXTRATROP MAX WIND 75 KT...GUSTS 90 KT. OUTLOOK VALID 06/1200Z 51.0N 34.3W...POST-TROP/EXTRATROP MAX WIND 60 KT...GUSTS 75 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.4N 61.8W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 01/1800Z NEXT ADVISORY AT 01/2100Z $$ FORECASTER CANGIALOSI/NEPAUL

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Summary for Hurricane Sam (AT3/AL182021)

2021-10-01 14:22:06| National Hurricane Center (Atlantic)

...SAM REMAINS A POWERFUL CATEGORY 4 HURRICANE OVER THE CENTRAL ATLANTIC... ...TROPICAL STORM CONDITIONS EXPECTED ON BERMUDA BY TONIGHT OR EARLY SATURDAY... As of 8:00 AM AST Fri Oct 1 the center of Sam was located near 27.5, -61.8 with movement NNW at 17 mph. The minimum central pressure was 934 mb with maximum sustained winds of about 150 mph.

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Hurricane Sam Public Advisory Number 35A

2021-10-01 14:22:06| National Hurricane Center (Atlantic)

Issued at 800 AM AST Fri Oct 01 2021 000 WTNT33 KNHC 011145 TCPAT3 BULLETIN Hurricane Sam Intermediate Advisory Number 35A NWS National Hurricane Center Miami FL AL182021 800 AM AST Fri Oct 01 2021 ...SAM REMAINS A POWERFUL CATEGORY 4 HURRICANE OVER THE CENTRAL ATLANTIC... ...TROPICAL STORM CONDITIONS EXPECTED ON BERMUDA BY TONIGHT OR EARLY SATURDAY... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...27.5N 61.8W ABOUT 380 MI...610 KM SSE OF BERMUDA MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H PRESENT MOVEMENT...NNW OR 345 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...934 MB...27.58 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 AM AST (1200 UTC), the eye of Hurricane Sam was located near latitude 27.5 North, longitude 61.8 West. Sam is moving toward the north-northwest near 17 mph (28 km/h). A turn toward the north and north-northeast, at a similar forward speed, is expected later today and tonight, followed by a northeastward motion Saturday night through Monday. On the forecast track, the center of Sam will pass well to the east of Bermuda tonight. Maximum sustained winds are near 150 mph (240 km/h) with higher gusts. Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Although fluctuations in intensity are still possible today, weakening is forecast during the next couple of days. However, Sam is expected to remain a major hurricane through at least Saturday night. Hurricane-force winds extend outward up to 70 miles (110 km) from the center and tropical-storm-force winds extend outward up to 175 miles (280 km). The estimated minimum central pressure is 934 mb (27.58 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 tonight or early Saturday. SURF: Swells generated by Sam will impact the northern Leeward Islands and the Greater Antilles, including Puerto Rico, during the next couple of days. Swells are expected to reach Bermuda and the Bahamas later today, and then spread to the United States east coast and Atlantic Canada 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 AM AST. $$ Forecaster Cangialosi

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