Atlantic Basin Tropical Cyclones

Hurricane Sam Forecast Advisory


022 
WTNT23 KNHC 040841
TCMAT3

HURRICANE SAM FORECAST/ADVISORY NUMBER  47
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL182021
0900 UTC MON OCT 04 2021

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

HURRICANE CENTER LOCATED NEAR 40.8N  48.7W AT 04/0900Z
POSITION ACCURATE WITHIN  20 NM

PRESENT MOVEMENT TOWARD THE NORTHEAST OR  45 DEGREES AT  26 KT

ESTIMATED MINIMUM CENTRAL PRESSURE  957 MB
EYE DIAMETER  20 NM
MAX SUSTAINED WINDS  90 KT WITH GUSTS TO 110 KT.
64 KT.......  0NE  60SE  50SW   0NW.
50 KT....... 90NE  90SE 100SW  70NW.
34 KT.......220NE 220SE 220SW 210NW.
12 FT SEAS..350NE 360SE 450SW 330NW.
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 40.8N  48.7W AT 04/0900Z
AT 04/0600Z CENTER WAS LOCATED NEAR 39.9N  49.9W

FORECAST VALID 04/1800Z 43.7N  45.0W
MAX WIND  80 KT...GUSTS 100 KT.
64 KT... 40NE  50SE  40SW   0NW.
50 KT... 90NE 110SE 100SW  80NW.
34 KT...220NE 230SE 270SW 220NW.

FORECAST VALID 05/0600Z 47.8N  41.5W...POST-TROP/EXTRATROP
MAX WIND  75 KT...GUSTS  90 KT.
64 KT... 40NE  40SE  40SW   0NW.
50 KT... 90NE 120SE 100SW  50NW.
34 KT...240NE 280SE 310SW 230NW.

FORECAST VALID 05/1800Z 50.1N  39.3W...POST-TROP/EXTRATROP
MAX WIND  70 KT...GUSTS  85 KT.
64 KT... 40NE  40SE  40SW   0NW.
50 KT... 80NE 140SE  90SW  80NW.
34 KT...280NE 350SE 400SW 290NW.

FORECAST VALID 06/0600Z 51.0N  35.8W...POST-TROP/EXTRATROP
MAX WIND  60 KT...GUSTS  75 KT.
50 KT... 60NE 110SE  70SW  50NW.
34 KT...290NE 350SE 380SW 330NW.

FORECAST VALID 06/1800Z 52.8N  31.2W...POST-TROP/EXTRATROP
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 60NE  50SE  40SW  60NW.
34 KT...210NE 290SE 310SW 180NW.

FORECAST VALID 07/0600Z 56.0N  28.0W...POST-TROP/EXTRATROP
MAX WIND  50 KT...GUSTS  60 KT.
50 KT... 60NE  60SE   0SW   0NW.
34 KT...220NE 260SE 200SW 220NW.

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 08/0600Z 60.6N  29.3W...POST-TROP/EXTRATROP
MAX WIND  45 KT...GUSTS  55 KT.

OUTLOOK VALID 09/0600Z 61.5N  30.0W...POST-TROP/EXTRATROP
MAX WIND  40 KT...GUSTS  50 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 40.8N  48.7W

NEXT ADVISORY AT 04/1500Z

$$
FORECASTER STEWART





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