HSFAT1
HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC FRI AUG 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC AUG 21.
24 HOUR FORECAST VALID 1800 UTC AUG 22.
48 HOUR FORECAST VALID 1800 UTC AUG 23.
.WARNINGS.
...GALE WARNING...
.LOW 61N62W 992 MB MOVING SW 10 KT. N OF 61N W OF 59W WINDS 25
TO 35 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST LOW DISSIPATED AND NEW SECOND LOW 61N51W 999
MB. N OF 55N W OF 50W WINDS 20 TO 30 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 59N41W 1004 MB. WITHIN 660 NM S AND 420 NM
W QUADRANTS WINDS TO 25 KT. SEAS TO 3 M.
...GALE WARNING...
.COMPLEX LOW WITH MEAN CENTER NEAR 61N43W 1003 MB MOVING E 10
KT. NE AND E OF A LINE FROM 49N45W TO 57N53W WINDS 20 TO 30 KT.
SEAS TO 3.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER JUST E OF AREA
NEAR 64N31W 992 MB. N OF 58N E OF 39W WINDS 20 TO 30 KT. SEAS TO
4 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER NEAR 63N35W 1000
MB. N OF 63N E OF 39W WINDS 25 TO 40 KT. SEAS 3 TO 6 M.
.SYNOPSIS AND FORECAST.
.48 HOUR FORECAST INLAND LOW 46N78W 1003 MB. WITHIN 900 NM E
QUADRANT WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 65N
BETWEEN 40W AND 58W.
.24 HOUR FORECAST DENSE FOG FROM 41N TO 44N BETWEEN 65W AND
68W...FROM 43N TO 49N BETWEEN 44W AND 52W...FROM 49N TO 53N E OF
42W...AND FROM 60N TO 64N BETWEEN 47W AND 54W.
.48 HOUR FORECAST DENSE FOG FROM 41N TO 45N BETWEEN 60W AND 69W.
.FORECASTER KELLS. 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 1800 UTC FRI AUG 21.
24 HOUR FORECAST VALID 1800 UTC SAT AUG 22.
48 HOUR FORECAST VALID 1800 UTC SUN AUG 23.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.ATLC AND CARIBBEAN WITHIN 21N71W TO 21N72W TO 21N73W TO 19N74W
TO 20N72W TO 20N71W TO 21N71W NE TO E WINDS 20 TO 25 KT. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.39 HOUR FORECAST CONDITIONS IMPROVE.
.CARIBBEAN WITHIN 14N70W TO 17N73W TO 16N76W TO 12N78W TO 11N77W
TO 12N69W TO 14N70W...INCLUDING THE GULF OF VENEZUELA...NE TO E
WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 15N75W TO 15N78W TO 12N79W TO 11N77W TO
12N75W TO 11N70W TO 15N75W...INCLUDING THE GULF OF
VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST WITHIN 13N71W TO 13N72W TO 12N73W TO 11N70W TO
12N70W TO 13N71W...INCLUDING THE GULF OF VENEZUELA...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
$$
.FORECASTER KONARIK. NATIONAL HURRICANE CENTER.