HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC MON AUG 17 2026
CCODE/1:31:04:01:00/AOE/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS
SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).
FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP
(ALL LOWERCASE).
FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
SECURITE
NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W
ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS
SYNOPSIS VALID 0000 UTC AUG 17.
24 HOUR FORECAST VALID 0000 UTC AUG 18.
48 HOUR FORECAST VALID 0000 UTC AUG 19.
.WARNINGS.
...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 36N50W 1009 MB MOVING NE 10 KT AND
SECOND CENTER 32N57W 1009 MB MOVING NE 30 KT. WITHIN 180 NM SE
QUADRANT OF MAIN CENTER WINDS 25 TO 35 KT. SEAS TO 3 M.
ELSEWHERE WITHIN 300 NM N SEMICIRCLE...AND 360 NM SE AND 540 NM
SW QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW 40N48E 1010 MB. WITHIN 480 NM E
SEMICIRCLE...AND 240 NM NW AND 120 NM SW QUADRANTS WINDS 20 TO
30 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW 43N46E 1015 MB. WITHIN 120 NM SE QUADRANT
WINDS TO 25 KT. SEAS TO 2.5 M.
...GALE WARNING...
.24 HOUR FORECAST N OF 59N BETWEEN 51W AND 60W WINDS 20 TO 30
KT. SEAS TO 2.5 M.
.36 HOUR FORECAST N OF 61N BETWEEN THE W COAST OF GREENLAND AND
55W WINDS 25 TO 40 KT. SEAS... ELSEWHERE N OF 60N BETWEEN 46W
AND 56W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST WITHIN 120 NM SW OF THE W COAST OF GREENALDN
WINDS TO 25 KT. SEAS TO 2.5 M.
.SYNOPSIS AND FORECAST.
.LOW E OF AREA NEAR 56N32W 998 MB MOVING NE 15 KT. WITHIN 360 NM
SW QUADRANT...AND BETWEEN 300 NM AND 540 NM NW QUADRANT WINDS 20
TO 30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW E OF AREA NEAR 60N28W 997 MB. WITHIN 420
NM W SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW WELL E OF AREA AND CONDITIONS MOVED E OF
AREA.
.24 HOUR FORECAST LOW 40N70W 1008 MB. WITHIN 300 NM SE AND 360
NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 42N67W 1009 MB. WITHIN 300 NM NE AND 420
NM SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 54N TO 57N E
OF 36W.
.24 HOUR FORECAST DENSE FOG FROM 57N TO 60N BETWEEN 59W AND
64W...AND FROM 62N TO 67N BETWEEN 57W AND 65W.
.48 HOUR FORECAST DENSE FOG FROM 40N TO 46N BETWEEN 62W AND 69W
AND FROM 56N TO 66N BETWEEN 43W AND 57W.
.FORECASTER HOLLEY. OCEAN PREDICTION CENTER.
NATIONAL HURRICANE CENTER MIAMI FL
ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF AMERICA
SYNOPSIS VALID 0000 UTC MON AUG 17.
24 HOUR FORECAST VALID 0000 UTC TUE AUG 18.
48 HOUR FORECAST VALID 0000 UTC WED AUG 19.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC WITHIN 31N52W TO 31N60W TO 30N60W TO 29N59W TO 30N56W TO
30N53W TO 31N52W SW TO W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 31N48W TO 31N53W TO 30N53W TO 30N50W TO
31N48W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN W SWELL.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.ATLC AND CARIBBEAN WITHIN 20N73W TO 20N76W TO 19N76W TO 19N73W
TO 20N73W NE TO E WINDS 20 TO 30 KT. SEAS TO 2.5 M.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 20N73W TO 20N74W TO 20N75W TO 19N75W
TO 19N74W TO 19N73W TO 20N73W NE WINDS 20 TO 25 KT. SEAS LESS
THAN 2.5 M.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.CARIBBEAN WITHIN 16N69W TO 19N76W TO 18N79W TO 12N82W TO 11N75W
TO 12N69W TO 16N69W...INCLUDING BETWEEN CUBA AND JAMAICA AND IN
MONA PASSAGE AND THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 30
KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 13N70W TO 13N74W TO 11N74W TO 12N72W TO
11N72W TO 12N69W TO 13N70W...INCLUDING THE GULF OF VENEZUELA...
NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M. WITHIN 16N73W TO
17N77W TO 15N80W TO 12N81W TO 11N79W TO 13N72W TO 16N73W WINDS 20
KT OR LESS. SEAS 2.5 TO 3.0 M IN E SWELL.
.48 HOUR FORECAST WITHIN 13N71W TO 13N73W TO 12N74W TO 11N74W
TO 11N73W TO 13N71W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5
M.
.GULF OF AMERICA WITHIN 21N91W TO 20N92W TO 19N92W TO 19N91W TO
21N91W...INCLUDING WITHIN 60 NM OF COAST OF CAMPECHE...N TO NE
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.06 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.27 HOUR FORECAST WITHIN 21N91W TO 21N92W TO 19N92W TO 19N91W
TO 20N91W TO 21N91W...INCLUDING WITHIN 60 NM OF COAST OF
CAMPECHE...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
$$
.FORECASTER RAMOS. NATIONAL HURRICANE CENTER.