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Hurricane Sam Wind Speed Probabilities Number 12
2021-09-25 16:40:51| National Hurricane Center (Atlantic)
Issued at 1500 UTC SAT SEP 25 2021 000 FONT13 KNHC 251440 PWSAT3 HURRICANE SAM WIND SPEED PROBABILITIES NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 1500 UTC SAT SEP 25 2021 AT 1500Z THE CENTER OF HURRICANE SAM WAS LOCATED NEAR LATITUDE 12.9 NORTH...LONGITUDE 47.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 105 KTS...120 MPH...195 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 12Z SAT AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 12Z SAT 00Z SUN 12Z SUN 00Z MON 12Z MON 12Z TUE 12Z WED PERIODS TO TO TO TO TO TO TO 00Z SUN 12Z SUN 00Z MON 12Z MON 12Z TUE 12Z WED 12Z THU FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT VIEQUES PR 34 X X( X) X( X) X( X) X( X) X( X) 4( 4) SAINT THOMAS 34 X X( X) X( X) X( X) X( X) X( X) 5( 5) SAINT CROIX 34 X X( X) X( X) X( X) X( X) X( X) 5( 5) SAINT MAARTEN 34 X X( X) X( X) X( X) X( X) 2( 2) 9(11) SAINT MAARTEN 50 X X( X) X( X) X( X) X( X) X( X) 4( 4) SAINT MAARTEN 64 X X( X) X( X) X( X) X( X) X( X) 2( 2) SABA 34 X X( X) X( X) X( X) X( X) 1( 1) 8( 9) SABA 50 X X( X) X( X) X( X) X( X) X( X) 3( 3) SABA 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) ST EUSTATIUS 34 X X( X) X( X) X( X) X( X) 2( 2) 7( 9) ST EUSTATIUS 50 X X( X) X( X) X( X) X( X) X( X) 2( 2) ST EUSTATIUS 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) ST KITTS-NEVIS 34 X X( X) X( X) X( X) X( X) 2( 2) 7( 9) ST KITTS-NEVIS 50 X X( X) X( X) X( X) X( X) X( X) 2( 2) ST KITTS-NEVIS 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) BARBUDA 34 X X( X) X( X) X( X) X( X) 4( 4) 12(16) BARBUDA 50 X X( X) X( X) X( X) X( X) 1( 1) 4( 5) BARBUDA 64 X X( X) X( X) X( X) X( X) X( X) 3( 3) ANTIGUA 34 X X( X) X( X) X( X) X( X) 3( 3) 10(13) ANTIGUA 50 X X( X) X( X) X( X) X( X) 1( 1) 2( 3) ANTIGUA 64 X X( X) X( X) X( X) X( X) X( X) 2( 2) GUADELOUPE 34 X X( X) X( X) X( X) X( X) 3( 3) 7(10) GUADELOUPE 50 X X( X) X( X) X( X) X( X) X( X) 2( 2) GUADELOUPE 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) AVES 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) DOMINICA 34 X X( X) X( X) X( X) X( X) 3( 3) 3( 6) MARTINIQUE 34 X X( X) X( X) X( X) X( X) 3( 3) 2( 5) SAINT LUCIA 34 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) BARBADOS 34 X X( X) X( X) X( X) 1( 1) 2( 3) X( 3) $$ FORECASTER LATTO
Hurricane Sam Graphics
2021-09-25 10:33:56| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Sat, 25 Sep 2021 08:33:56 GMT Wind Speed Probabilities last updated Sat, 25 Sep 2021 09:22:17 GMT
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Summary for Hurricane Sam (AT3/AL182021)
2021-09-25 10:32:54| National Hurricane Center (Atlantic)
...SAM ALMOST A MAJOR HURRICANE... ...ADDITIONAL STRENGTHENING EXPECTED... As of 5:00 AM AST Sat Sep 25 the center of Sam was located near 12.8, -46.7 with movement WNW at 13 mph. The minimum central pressure was 973 mb with maximum sustained winds of about 110 mph.
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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Hurricane Sam Forecast Advisory Number 11
2021-09-25 10:32:54| National Hurricane Center (Atlantic)
Issued at 0900 UTC SAT SEP 25 2021 089 WTNT23 KNHC 250832 TCMAT3 HURRICANE SAM FORECAST/ADVISORY NUMBER 11 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 0900 UTC SAT SEP 25 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. HURRICANE CENTER LOCATED NEAR 12.8N 46.7W AT 25/0900Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 290 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 973 MB MAX SUSTAINED WINDS 95 KT WITH GUSTS TO 115 KT. 64 KT....... 15NE 15SE 10SW 15NW. 50 KT....... 30NE 25SE 15SW 25NW. 34 KT....... 50NE 40SE 30SW 50NW. 12 FT SEAS..120NE 75SE 75SW 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 12.8N 46.7W AT 25/0900Z AT 25/0600Z CENTER WAS LOCATED NEAR 12.7N 46.3W FORECAST VALID 25/1800Z 13.1N 48.0W MAX WIND 110 KT...GUSTS 135 KT. 64 KT... 20NE 10SE 10SW 10NW. 50 KT... 30NE 20SE 20SW 20NW. 34 KT... 60NE 60SE 40SW 60NW. FORECAST VALID 26/0600Z 13.5N 49.3W MAX WIND 115 KT...GUSTS 140 KT. 64 KT... 25NE 15SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 30NW. 34 KT... 70NE 70SE 40SW 60NW. FORECAST VALID 26/1800Z 14.0N 50.4W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 25NE 15SE 10SW 20NW. 50 KT... 40NE 30SE 20SW 30NW. 34 KT... 80NE 70SE 50SW 70NW. FORECAST VALID 27/0600Z 14.7N 51.5W MAX WIND 120 KT...GUSTS 145 KT. 64 KT... 30NE 25SE 20SW 25NW. 50 KT... 50NE 40SE 30SW 40NW. 34 KT... 90NE 80SE 60SW 80NW. FORECAST VALID 27/1800Z 15.4N 52.5W MAX WIND 115 KT...GUSTS 140 KT. 50 KT... 50NE 40SE 30SW 40NW. 34 KT... 90NE 90SE 60SW 80NW. FORECAST VALID 28/0600Z 16.3N 53.7W MAX WIND 115 KT...GUSTS 140 KT. 50 KT... 50NE 40SE 30SW 40NW. 34 KT...100NE 90SE 60SW 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 29/0600Z 18.0N 56.0W MAX WIND 110 KT...GUSTS 135 KT. OUTLOOK VALID 30/0600Z 20.1N 59.0W MAX WIND 110 KT...GUSTS 135 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.8N 46.7W NEXT ADVISORY AT 25/1500Z $$ FORECASTER CANGIALOSI
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