Atlantic Basin Tropical Cyclones

Hurricane Sam Forecast Advisory


000
WTNT23 KNHC 271452
TCMAT3

HURRICANE SAM FORECAST/ADVISORY NUMBER  20
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL182021
1500 UTC MON SEP 27 2021

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

HURRICANE CENTER LOCATED NEAR 15.7N  52.1W AT 27/1500Z
POSITION ACCURATE WITHIN  15 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT   7 KT

ESTIMATED MINIMUM CENTRAL PRESSURE  966 MB
MAX SUSTAINED WINDS 110 KT WITH GUSTS TO 135 KT.
64 KT....... 25NE  20SE  20SW  20NW.
50 KT....... 40NE  30SE  30SW  35NW.
34 KT....... 90NE  90SE  60SW  80NW.
12 FT SEAS..120NE  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 15.7N  52.1W AT 27/1500Z
AT 27/1200Z CENTER WAS LOCATED NEAR 15.4N  51.7W

FORECAST VALID 28/0000Z 16.4N  52.8W
MAX WIND 110 KT...GUSTS 135 KT.
64 KT... 25NE  20SE  20SW  20NW.
50 KT... 40NE  30SE  30SW  35NW.
34 KT... 90NE  90SE  60SW  80NW.

FORECAST VALID 28/1200Z 17.3N  53.9W
MAX WIND 110 KT...GUSTS 135 KT.
64 KT... 30NE  25SE  20SW  25NW.
50 KT... 50NE  40SE  30SW  40NW.
34 KT... 90NE  90SE  60SW  80NW.

FORECAST VALID 29/0000Z 18.1N  55.1W
MAX WIND 110 KT...GUSTS 135 KT.
64 KT... 30NE  25SE  20SW  25NW.
50 KT... 50NE  40SE  30SW  40NW.
34 KT... 90NE  90SE  60SW  80NW.

FORECAST VALID 29/1200Z 19.1N  56.5W
MAX WIND 110 KT...GUSTS 135 KT.
64 KT... 40NE  30SE  25SW  30NW.
50 KT... 60NE  50SE  40SW  50NW.
34 KT...100NE  90SE  70SW  80NW.

FORECAST VALID 30/0000Z 20.2N  58.1W
MAX WIND 110 KT...GUSTS 135 KT.
50 KT... 60NE  50SE  40SW  50NW.
34 KT...110NE 100SE  70SW  80NW.

FORECAST VALID 30/1200Z 21.7N  59.8W
MAX WIND 110 KT...GUSTS 135 KT.
50 KT... 60NE  60SE  50SW  50NW.
34 KT...110NE 110SE  80SW  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 01/1200Z 25.9N  62.2W
MAX WIND 110 KT...GUSTS 135 KT.

OUTLOOK VALID 02/1200Z 32.0N  61.3W
MAX WIND 100 KT...GUSTS 120 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.7N  52.1W

NEXT ADVISORY AT 27/2100Z

$$
FORECASTER HAGEN/PASCH




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