628
FZNT01 KWBC 212218
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU AUG 21 2025

CCODE/2:31:04:11:00/AOE+AOW/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

...HURRICANE WARNING...
.HURRICANE ERIN NEAR 36.4N 69.1W 952 MB AT 2100 UTC AUG 21
MOVING NE OR 050 DEG AT 17 KT. MAXIMUM SUSTAINED WINDS 85 KT
GUSTS 105 KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM OF CENTER
EXCEPT 280 NM SE QUADRANT. SEAS 4 M OR GREATER WITHIN 420 NM S
SEMICIRCLE...480 NM NE QUADRANT AND 320 NM NW QUADRANT WITH SEAS
TO 16 M. ELSEWHERE FROM 31N TO 43N BETWEEN 61W AND 78W WINDS 20
TO 33 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST HURRICANE ERIN NEAR 40.0N 61.3W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 290 NM NE QUADRANT...280 NM SE QUADRANT...210 NM SW
QUADRANT...AND 240 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN
360 NM NE...540 NM SE...660 NM SW...AND 480 NM NW QUADRANTS WITH
SEAS TO 15.5 M. ELSEWHERE FROM 31N TO 45N BETWEEN 50W AND 74W
WINDS 20 TO 33 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST POST-TROPICAL CYCLONE ERIN NEAR 44.7N 47.3W.
MAXIMUM SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE
WINDS WITHIN 300 NM NE QUADRANT...340 NM SE QUADRANT...270 NM SW
QUADRANT...AND 240 NM NW QUADRANT. SEAS TO 4 M OR GREATER WITHIN
240 NM NE...600 NM SE...1080 NM SW...AND 480 NM NW QUADRANTS
WITH SEAS TO 17 M. ALSO WITHIN 540 NM OF CENTER EXCEPT 420 NM N
QUADRANT WINDS 20 TO 30 KT. SEAS 2.5 TO 6 M...HIGHEST SW OF
CENTER. ELSEWHERE WITHIN AN AREA BOUNDED BY A LINE FROM 31N66W
TO 39N72W TO 53N57W TO 46N35W TO 31N47W TO 31N66W WINDS LESS
THAN 25 KT. SEAS 2.5 TO 6 M IN MIXED SWELL...HIGHEST S AND SW OF
CENTER.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

...GALE WARNING...
.LOW 53N45W 993 MB DRIFTING NE. WITHIN 150 NM N OF A LINE FROM
58N42W TO 55N50W WINDS 35 TO 45 KT. SEAS 4 TO 6 M. ALSO BETWEEN
120 NM AND 480 NM W AND BETWEEN 90 NM AND 360 NM NW AND S
QUADRANTS...AND FROM 58N TO 62N E OF 45W WINDS 25 TO 35 KT. SEAS
2.5 TO 4.5 M. ELSEWHERE FROM 46N TO 60N E OF 59W AND FROM 62N TO
64N E OF GREENLAND WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 54N42W 994 MB. WITHIN 180 NM N OF A LINE
FROM 56N46W TO 59N41W WINDS 25 TO 40 KT. SEAS 3 TO 4 M.
ELSEWHERE WITHIN 540 NM SW SEMICIRCLE...300 NM SE AND 360 NM NW
QUADRANTS AND N OF 62N E OF GREENLAND WINDS TO 25 KT. SEAS TO
4.5 M...HIGHEST SE OF LOW.
.48 HOUR FORECAST LOW 56N35W 996 MB. WITHIN 480 NM S AND SW
QUADRANTS WINDS TO 25 KT. SEAS TO 3 M...HIGHEST NEAR 50N35W.

...GALE WARNING...
.N OF 60N BETWEEN 49W AND 57W AREA OF N TO NW WINDS TO 25 KT.
SEAS TO 2.5 M.
.24 HOUR FORECAST N OF 60N BETWEEN 52W AND 60W N TO NW WINDS 20
TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST N OF 62N BETWEEN 52W AND 59W AREA OF N TO NW
WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M. ELSEWHERE N OF 54N BETWEEN
51W AND 61W WINDS TO 25 KT. SEAS TO 3 M.

...GALE WARNING...
.48 HOUR FORECAST LOW 64N35W 993 MB. WITHIN 180 NM N AND 120 NM
W QUADRANTS WINDS 25 TO 35 KT. SEAS TO 3.5 M. ELSEWHERE N OF 61N
E OF GREENLAND WINDS TO 25 KT. SEAS TO 2.5 M.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 53N TO 56N
BETWEEN 52W AND 59W...AND N OF 60N BETWEEN 48W AND 52W.
.24 HOUR FORECAST DENSE FOG FROM 54N TO 57N BETWEEN 42W AND 47W.
.48 HOUR FORECAST DENSE FOG N OF 63N E OF 37W.

.FORECASTER BANCROFT. 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 THU AUG 21.
24 HOUR FORECAST VALID 1800 UTC FRI AUG 22.
48 HOUR FORECAST VALID 1800 UTC SAT AUG 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC HURRICANE ERIN N OF AREA. OVER FORECAST WATERS WITHIN
31N64W TO 31N74W TO 28N71W TO 29N66W TO 31N64W SW WINDS 20 TO 30
KT. SEAS 4.0 TO 6.0 M IN W TO NW SWELL. ELSEWHERE WITHIN 31N61W
TO 29N71W TO 31N81W TO 27N79W TO 26N71W TO 27N65W TO
31N61W...INCLUDING ATLANTIC EXPOSURES...WINDS 20 KT OR LESS.
SEAS 2.5 TO 4.0 M IN NW TO N SWELL.
.24 HOUR FORECAST WITHIN 31N57W TO 31N78W TO 27N73W TO 27N64W TO
31N57W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M IN NW TO N SWELL.
.48 HOUR FORECAST WITHIN 31N46W TO 31N74W TO 24N69W TO 23N59W TO
31N46W WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M IN NW TO N SWELL.

.ATLC 48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL
CYCLONE...NEAR 23N64W 1012 MB. WITHIN 24N62W TO 25N66W TO 24N67W
TO 22N66W TO 22N62W TO 24N62W WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0
M.

.CARIBBEAN WITHIN 13N70W TO 13N72W TO 13N74W TO 11N73W TO 11N71W
TO 11N70W TO 13N70W...INCLUDING THE GULF OF VENEZUELA...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS.
SEAS LESS THAN 2.5 M.

.CARIBBEAN 30 HOUR FORECAST WITHIN 16N85W TO 17N86W TO 16N87W TO
16N86W TO 16N85W 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 ERA. NATIONAL HURRICANE CENTER.