Atlantic Basin Tropical Cyclones

Hurricane Sam Forecast Advisory


041 
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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