795 

FZNT01 KWBC 181006
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC SAT APR 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

SECURITE

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 0600 UTC APR 18.
24 HOUR FORECAST VALID 0600 UTC APR 19.
48 HOUR FORECAST VALID 0600 UTC APR 20.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH MAIN CENTER 54N42W 988 MB MOVING NE 15 KT AND
INTENSIFYING. WITHIN 240 NM NE...360 NM SE AND 600 NM S QUADRANTS
AND WITHIN 120 NM W AND NW OF A LINE FROM 48N47W TO
52N46W...WITHIN 120 NM NW AND N OF LINE FROM 52N46W TO THE LOW
WINDS 30 TO 45 KT. SEAS 3.5 TO 6.5 M...HIGHEST NEAR 52N41W.
ELSEWHERE FROM 40N TO 50N E OF 55W AND FROM 50N TO 56N W OF 35W
WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M. ALSO WITHIN 120 NM NW AND N
OF A LINE FROM 41N66W TO 44N54W WINDS TO 25 KT. SEAS TO 2.5 M.
.06 HOUR FORECAST COMPLEX LOW WITH MAIN LOW 54N39W 982 MB. NE AND
E OF A FRONT FROM THE LOW TO 49N37W TO 44N39W AND WITHIN 480 NM
SW...W AND 840 NM NW QUADRANTS WINDS 35 TO 50 KT. SEAS 4 TO 8 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN LOW 59N39W 970 MB. N OF
60N E OF 38W AND WITHIN 540 NM S...420 NM SW AND 360 NM NW
QUADRANTS WINDS 40 TO 55 KT. SEAS 5 TO 10 M...HIGHEST NEAR
58N43W. ELSEWHERE FROM 37N TO 50N E OF 45W...FROM 50N TO 60N E OF
53W...FROM 60N TO 63N E OF 53W TO THE W GREENLAND COAST AND N OF
60N W OF 38W TO THE E GREENLAND COAST WINDS 25 TO 40 KT. SEAS 3
TO 6 M. ALSO FROM 41N TO 45N BETWEEN 52W AND 66W AND IN THE GULF
OF SAINT LAWRENCE WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 57N36W 1002 MB. WITHIN 180 NM NE OF A LINE
FROM 58N51W TO 63N56W WINDS 30 TO 40 KT. SEAS 3 TO 6 M. ELSEWHERE
WITHIN AN AREA BOUNDED BY A LINE FROM 43N35W TO 50N49W TO 50N35W
TO 43N35W...FROM 50N TO 60N W OF 35W...FROM 60N TO 62N E OF
GREENLAND...FROM 60N TO 64N W OF 54W AND N OF 64N W OF GREENLAND
WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M

...GALE WARNING...
.LOW 64N40W 989 MB MOVING NE 20 KT. N OF 62N E OF GREENLAND AND
WITHIN 120 NM SW OF A LINE FROM 58N51W TO 60N56W WINDS 30 TO 40
KT. SEAS 4 TO 8 M...HIGHEST N OF 64N E OF 37W. ELSEWHERE FROM 56N
TO 60N W OF 35W...FROM 60N TO 62N E OF GREENLAND AND N OF 60N W
OF GREENLAND WINDS 20 TO 30 KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST LOW N OF AREA AND CONDITIONS ABSORBED BY LOW
59N39W DESCRIBED IN STORM WARNING ABOVE.

...GALE WARNING...
.42 HOUR FORECAST NEW INLAND LOW 49N64W 1001 MB. WITHIN 720 NM SE
AND BETWEEN 300 NM AND 720 NM S AND 300 NM AND 1260 NM SW
QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST INLAND LOW 50N62W 998 MB. WITHIN 780 NM
SE...720 NM S AND BETWEEN 420 NM AND 1320 NM SW QUADRANTS WINDS
20 TO 30 KT. SEAS 2.5 TO 3.5 M.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 39N TO 45N
BETWEEN 64W AND 69W...INCLUDING THE BAY OF FUNDY...FROM 43N TO
50N BETWEEN 41W AND 49W...WITHIN 180 NM NW AND N OF A LINE FROM
50N42W TO 56N35W AND N OF 62N W OF GREENLAND.
.24 HOUR FORECAST DENSE FOG FROM 41N TO 45N BETWEEN 62W AND 68W
AND FROM 58N TO 60N E OF 42W.
.48 HOUR FORECAST DENSE FOG FROM 43N TO 51N BETWEEN 51W AND
63W...INCLUDING THE GULF OF SAINT LAWRENCE AND N OF 58N W OF 53W.

.LIGHT TO MODERATE FREEZING SPRAY FROM 46N TO 50N W OF
50W...INCLUDING THE GULF OF SAINT LAWRENCE...FROM 55N TO 60N W OF
42W AND N OF 60N W OF GREENLAND.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY FROM 45N TO
60N BETWEEN 45W AND 59W AND N OF 60N W OF GREENLAND.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.FORECASTER FUTTERMAN. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF AMERICA

SYNOPSIS VALID 0600 UTC SAT APR 18.
24 HOUR FORECAST VALID 0600 UTC SUN APR 19.
48 HOUR FORECAST VALID 0600 UTC MON APR 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC WITHIN 14N35W TO 15N48W TO 12N54W TO 06N54W TO 07N35W TO
14N35W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NE SWELL.
.24 HOUR FORECAST WITHIN 10N42W TO 11N45W TO 09N47W TO 07N47W TO
07N41W TO 10N42W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NE
SWELL.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.ATLC 42 HOUR FORECAST WITHIN 31N78.5W TO 31N81W TO 30.5N80.5W
TO 31N78.5W N TO NE WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 31N77W TO 31N81W TO 29N81W TO 29N80W TO
31N77W N TO NE WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.

.GULF OF AMERICA 24 HOUR FORECAST WITHIN 30N92W TO 30N95W TO
29N97W TO 26N97W TO 26N96W TO 28N94W TO 30N92W N TO NE WINDS 20
TO 30 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 30N84W TO 31N87W TO 29N89W TO 28N89W TO
28N88W TO 28N85W TO 30N84W NE 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 AL. NATIONAL HURRICANE CENTER.

$$






998 

FZPN40 PHFO 181037
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC SAT APR 18 2026

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.

THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE
HIGHER THAN 10-MINUTE AVERAGE WINDS.

SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W

SYNOPSIS VALID 0600 UTC APR 18 2026.
24 HOUR FORECAST VALID 0600 UTC APR 19 2026.
48 HOUR FORECAST VALID 0600 UTC APR 20 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT 30N148W 27N152W THENCE TROUGH 24N154W MOVING E 10 KT.
.24 HOUR FORECAST FRONT 29N140W 26N153W. TROUGH DISSIPATED.
.48 HOUR FORECAST FRONT MOVED E OF AREA.

.TROUGH 26N168W 20N171W 13N173W NEARLY STATIONARY. SCATTERED
MODERATE TSTMS FROM 27N TO 20N BETWEEN 169W AND 163W.
.24 HOUR FORECAST TROUGH 30N168W 23N170W 17N172W.
.48 HOUR FORECAST TROUGH 30N162W 25N164W 18N169W.

.48 HOUR FORECAST NEW TROUGH 30N178W 27N180W. SEAS 2.5 TO 3 M NW
OF LINE 30N175W 25N180W.

.WINDS 20 KT OR LESS OVER ENTIRE FORECAST AREA.

.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.

.ITCZ 05N140W 06N162W 04N180W. SCATTERED MODERATE TSTMS WITHIN 240
NM N OF ITCZ.

.ISOLATED MODERATE TSTMS FROM 19N TO 16N BETWEEN 160W AND 154W.

$$

.FORECASTER M BALLARD. HONOLULU HI.