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Hurricane Sam Forecast Advisory Number 12
2021-09-25 16:40:57| National Hurricane Center (Atlantic)
Issued at 1500 UTC SAT SEP 25 2021 000 WTNT23 KNHC 251440 TCMAT3 HURRICANE SAM FORECAST/ADVISORY NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 1500 UTC SAT SEP 25 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. HURRICANE CENTER LOCATED NEAR 12.9N 47.6W AT 25/1500Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 960 MB MAX SUSTAINED WINDS 105 KT WITH GUSTS TO 130 KT. 64 KT....... 20NE 15SE 10SW 15NW. 50 KT....... 30NE 30SE 20SW 25NW. 34 KT....... 70NE 90SE 40SW 60NW. 12 FT SEAS.. 90NE 90SE 120SW 120NW. 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 12.9N 47.6W AT 25/1500Z AT 25/1200Z CENTER WAS LOCATED NEAR 12.8N 47.2W FORECAST VALID 26/0000Z 13.3N 48.7W MAX WIND 110 KT...GUSTS 135 KT. 64 KT... 20NE 15SE 10SW 15NW. 50 KT... 30NE 30SE 20SW 25NW. 34 KT... 70NE 90SE 40SW 60NW. FORECAST VALID 26/1200Z 13.7N 49.8W MAX WIND 115 KT...GUSTS 140 KT. 64 KT... 25NE 15SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 30NW. 34 KT... 70NE 90SE 40SW 60NW. FORECAST VALID 27/0000Z 14.3N 50.8W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 25NE 15SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 30NW. 34 KT... 80NE 90SE 50SW 70NW. FORECAST VALID 27/1200Z 15.0N 51.9W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 30NE 25SE 20SW 25NW. 50 KT... 50NE 40SE 30SW 40NW. 34 KT... 90NE 90SE 60SW 80NW. FORECAST VALID 28/0000Z 15.8N 53.0W MAX WIND 115 KT...GUSTS 140 KT. 50 KT... 50NE 40SE 30SW 40NW. 34 KT... 90NE 90SE 60SW 80NW. FORECAST VALID 28/1200Z 16.6N 54.1W MAX WIND 115 KT...GUSTS 140 KT. 50 KT... 50NE 50SE 40SW 40NW. 34 KT...100NE 90SE 70SW 90NW. 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 29/1200Z 18.4N 56.5W MAX WIND 110 KT...GUSTS 135 KT. OUTLOOK VALID 30/1200Z 20.7N 59.8W MAX WIND 110 KT...GUSTS 135 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.9N 47.6W NEXT ADVISORY AT 25/2100Z $$ FORECASTER LATTO
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Hurricane Sam Public Advisory Number 12
2021-09-25 16:40:51| National Hurricane Center (Atlantic)
Issued at 1100 AM AST Sat Sep 25 2021 000 WTNT33 KNHC 251440 TCPAT3 BULLETIN Hurricane Sam Advisory Number 12 NWS National Hurricane Center Miami FL AL182021 1100 AM AST Sat Sep 25 2021 ...SMALL BUT DANGEROUS SAM NOW A MAJOR HURRICANE... ...SOME ADDITIONAL STRENGTHENING EXPECTED THIS WEEKEND... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...12.9N 47.6W ABOUT 1095 MI...1760 KM ESE OF THE NORTHERN LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...960 MB...28.35 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Hurricane Sam was located near latitude 12.9 North, longitude 47.6 West. Sam is moving toward the west-northwest near 10 mph (17 km/h). A slower motion to the west-northwest is expected over the weekend, followed by a turn to the northwest on Monday. Maximum sustained winds have increased to near 120 mph (195 km/h) with higher gusts. Sam is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional strengthening is expected over the next day or so, and Sam is forecast to become a category 4 hurricane by Sunday. Some fluctuations in the hurricane's intensity are possible early next week. Sam is a small hurricane. Hurricane-force winds extend outward up to 25 miles (35 km) from the center and tropical-storm-force winds extend outward up to 105 miles (165 km). The estimated minimum central pressure is 960 mb (28.35 inches). HAZARDS AFFECTING LAND ---------------------- SURF: Swells generated by Sam are forecast to reach the Lesser Antilles early next week. 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 Latto
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Subtropical Storm Teresa Public Advisory Number 3
2021-09-25 10:35:55| National Hurricane Center (Atlantic)
Issued at 500 AM AST Sat Sep 25 2021 000 WTNT34 KNHC 250835 TCPAT4 BULLETIN Subtropical Storm Teresa Advisory Number 3 NWS National Hurricane Center Miami FL AL192021 500 AM AST Sat Sep 25 2021 ...TERESA REMAINS POORLY ORGANIZED... ...EXPECTED TO BECOME A REMNANT LOW BY TONIGHT... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...34.5N 65.5W ABOUT 155 MI...255 KM NNW OF BERMUDA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 6 MPH...9 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Subtropical Storm Teresa was located near latitude 34.5 North, longitude 65.5 West. The storm is moving toward the west-northwest near 6 mph (9 km/h). A turn to the north is expected later today, followed by a northeastward motion after that. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Teresa is expected to become a remnant by tonight and dissipate on Sunday. Winds of 40 mph extend outward up to 140 miles (220 km) from the center. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- None NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi
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Subtropical Storm Teresa Forecast Advisory Number 3
2021-09-25 10:35:54| National Hurricane Center (Atlantic)
Issued at 0900 UTC SAT SEP 25 2021 000 WTNT24 KNHC 250835 TCMAT4 SUBTROPICAL STORM TERESA FORECAST/ADVISORY NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL192021 0900 UTC SAT SEP 25 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. SUBTROPICAL STORM CENTER LOCATED NEAR 34.5N 65.5W AT 25/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1009 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT.......120NE 0SE 0SW 0NW. 12 FT SEAS..240NE 120SE 0SW 90NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 34.5N 65.5W AT 25/0900Z AT 25/0600Z CENTER WAS LOCATED NEAR 34.4N 65.5W FORECAST VALID 25/1800Z 35.4N 65.3W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/0600Z 37.2N 64.6W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 34.5N 65.5W NEXT ADVISORY AT 25/1500Z $$ FORECASTER CANGIALOSI
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Hurricane Sam Public Advisory Number 11
2021-09-25 10:32:54| National Hurricane Center (Atlantic)
Issued at 500 AM AST Sat Sep 25 2021 090 WTNT33 KNHC 250832 TCPAT3 BULLETIN Hurricane Sam Advisory Number 11 NWS National Hurricane Center Miami FL AL182021 500 AM AST Sat Sep 25 2021 ...SAM ALMOST A MAJOR HURRICANE... ...ADDITIONAL STRENGTHENING EXPECTED... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...12.8N 46.7W ABOUT 1150 MI...1855 KM ESE OF THE NORTHERN LEEWARD ISLANDS MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...973 MB...28.74 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the eye of Hurricane Sam was located near latitude 12.8 North, longitude 46.7 West. Sam is moving toward the west-northwest near 13 mph (20 km/h). A slower motion to the west-northwest is expected over the weekend, followed by a turn to the northwest on Monday. Maximum sustained winds have increased to near 110 mph (175 km/h) with higher gusts. Additional strengthening is forecast, and Sam is expected to become a major hurricane later today. Sam is a small hurricane. Hurricane-force winds extend outward up to 15 miles (30 km) from the center and tropical-storm-force winds extend outward up to 60 miles (95 km). The estimated minimum central pressure is 973 mb (28.74 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi
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