667
FZPN01 KWBC 202143
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU NOV 20 2025

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

PLEASE SEE PROPOSAL TO ALIGN NWS PACIFIC HIGH SEAS FORECASTS
WITH
METAREA XII: HTTPS://OCEAN.WEATHER.GOV/HIGHSEASPACIFICPROPOSAL/
(LOWERCASE).

FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).

SECURITE

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT
TO 50N 160E

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1800 UTC NOV 20.
24 HOUR FORECAST VALID 1800 UTC NOV 21.
48 HOUR FORECAST VALID 1800 UTC NOV 22.

.WARNINGS.

...STORM WARNING...
.LOW 58N153W 952 MB MOVING NE 10 KT. WITHIN 240 NM S AND SW
QUADRANTS WINDS 40 TO 55 KT. SEAS 6 TO 10.5 M. ELSEWHERE
FROM 38N TO 61N BETWEEN 128W AND 163W WINDS 25 TO 40 KT.
SEAS 4 TO 8 M.
.24 HOUR FORECAST LOW 59N148W 976 MB. N OF 45N BETWEEN
134W AND 180W WINDS 30 TO 45 KT. SEAS 4 TO 8 M. ELSEWHERE
N OF 42N BETWEEN 132W AND 179E WINDS 20 TO 30 KT. SEAS
3 TO 6 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 56N147W
1000 MB. WITHIN 360 NM E AND NE...300 NM SE...720 NM W
AND SW...AND 780 NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS
3 TO 6 M.

...STORM WARNING...
.LOW 50N168W 987 MB MOVING E 35 KT. WITHIN 240 NM S AND
SW QUADRANTS WINDS 40 TO 50 KT. SEAS 5 TO 9.5 M.
ELSEWHERE FROM 38N TO 52N BETWEEN 163W AND 166E WINDS
25 TO 40 KT. SEAS 4 TO 8 M.
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW
59N148W DESCRIBED ABOVE.

...STORM WARNING...
.COMPLEX LOW W OF AREA MEAN CENTER NEAR 35N154E 1012 MB
MOVING NE 20 KT AND INTENSIFYING. FROM 30N TO 37N W
OF 164E WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.06 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 35N160E
1009 MB. FROM 31N TO 38N W OF 166E WINDS 25 TO 35 KT.
SEAS 3 TO 5 M.
.24 HOUR FORECAST COMBINED LOW 38N165E 1004 MB. FROM
31N TO 42N BETWEEN 177E AND 161E WINDS 25 TO 40 KT.
SEAS 3 TO 5.5 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER 45N176E
989 MB. BETWEEN 120 NM AND 420 NM E AND NE...AND
BETWEEN 120 NM AND 300 NM W AND SW QUADRANTS WINDS 40
TO 50 KT. SEAS 4 TO 7 M. ELSEWHERE W OF A LINE FROM
59N179E TO 51N176W TO 47N171W TO 35N170W WINDS 25 TO
40 KT. SEAS 3 TO 6 M.

...GALE WARNING...
.LOW 34N122W 1013 MB MOVING SE 10 KT. WITHIN 120 NM W
AND SW SEMICIRCLES WINDS 25 TO 35 KT. SEAS 3 TO 4 M.
ELSEWHERE FROM 30N TO 38N BETWEEN 121W AND 135W WINDS
20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 33N118W 1012 MB. FROM 30N TO 43N
BETWEEN 120W AND 135W N TO NW WINDS 20 TO 30 KT. SEAS
3 TO 4.5 M.
.48 HOUR FORECAST LOW MOVED S OF AREA. FROM 30N TO 35N
E OF 132W N TO NW WINDS TO 25 KT. SEAS TO 3.5 M.

...GALE WARNING...
.LOW 63N170W 970 MB MOVING SE 20 KT. N OF 53N BETWEEN
163W AND 179E WINDS 25 TO 40 KT. SEAS 3 TO 5 M.
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW
59N148W DESCRIBED ABOVE.

...GALE WARNING...
.24 HOUR FORECAST LOW NW OF AREA NEAR 55N155E 980 MB.
FROM 44N TO 55N W OF 169E WINDS 25 TO 40 KT. SEAS 2.5
TO 4 M.
.48 HOUR FORECAST CONDITIONS DESCRIBED WITH COMPLEX
LOW IN THIRD STORM WARNING ABOVE.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF 61N W OF 169W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 58N
W OF 165W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N
OF 62N W OF 169W. ELSEWHERE LIGHT TO MODERATE FREEZING
SPRAY N OF 59N W OF 164W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N
OF 61N BETWEEN THE COAST OF ALASKA AND 170W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 59N
W OF ALASKA.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST NEW LOW TO FORM NEAR 38N151W 1018
MB WITH A FRONT TO EXTEND FROM 47N137W TO LOW CENTER
TO 30N166W. WITHIN 240 NM S AND SE QUADRANTS...WITHIN
240 NM E AND NE OF FRONT N OF LOW CENTER...AND WITHIN
540 NM W OF FRONT S OF LOW CENTER WINDS 20 TO 30 KT.
SEAS 3 TO 5 M.
.48 HOUR FORECAST LOW 47N133W 1012 MB WITH A FRONT
TO EXTEND FROM LOW CENTER TO 39N141W TO 35N148W TO
32N155W TO 31N166W. WITHIN 180 NM E AND NE
QUADRANTS...WITHIN 240 NM E AND SE OF FRONT N OF
39N...WITHIN 90 NM W AND NW OF FRONT N OF 39N....
AND WITHIN 240 NM N AND NE OF FRONT S OF 35N WINDS
20 TO 30 KT. SEAS 3 TO 4.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM N OF
56N E OF 160W...AND N OF 55N BETWEEN 165W AND 179W.
.24 HOUR FORECAST DENSE FOG N OF 55N E OF 174W.
.48 HOUR FORECAST DENSE FOG N OF 55N BETWEEN 152W
AND 167W...FROM 41N TO 47N BETWEEN 173W AND
179W...AND N OF 46N BETWEEN 172E AND 164E.

.FORECASTER MILLS. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1800 UTC THU NOV 20.
24 HOUR FORECAST VALID 1800 UTC FRI NOV 21.
48 HOUR FORECAST VALID 1800 UTC SAT NOV 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 14N129W TO 22N136W TO 23N140W TO 06N140W TO 09N133W TO
14N129W NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M. WITHIN
17N121W TO 17N127W TO 22N135W TO 15N129W TO 12N130W TO 13N125W TO
17N121W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N SWELL.
.24 HOUR FORECAST WITHIN 13N134W TO 19N140W TO 09N140W TO
10N135W TO 13N134W NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
WITHIN 16N121W TO 21N135W TO 21N140W TO 13N134W TO 07N140W TO
06N136W TO 16N121W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N
SWELL.
.48 HOUR FORECAST WITHIN 15N126W TO 17N131W TO 15N140W TO
04N140W TO 10N129W TO 15N126W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN N TO NE SWELL.

.COLD FRONT FROM 30N123W TO 27N136W. WITHIN 30N126W TO 30N140W
TO 29N140W TO 29N130W TO 29N126W TO 30N126W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 30N118W TO 23N130W. WITHIN
30N121W TO 30N131W TO 28N128W TO 28N123W TO 30N121W NW TO N WINDS
20 TO 25 KT. SEAS 2.5 TO 4.5 M. WITHIN 30N117W TO 28N128W TO
30N131W TO 30N140W TO 21N140W TO 24N127W TO 30N117W N TO NE WINDS
20 TO 25 KT. SEAS 2.5 TO 4.5 M IN MIXED WIND WAVES AND NW SWELL.
.48 HOUR FORECAST LOW PRES NEAR 29N117W. COLD FRONT HAS
DISSIPATED. WITHIN 30N116W TO 30N140W TO 14N140W TO 18N127W TO
24N116W TO 30N116W...INCLUDING SEBASTIAN VIZCAINO BAY AND WITHIN
60 NM OF SHORE... WINDS 20 KT OR LESS. SEAS 2.5 TO 4.5 M IN NW
SWELL.

.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N97W TO 15N97W TO
14N95W TO 14N94W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC... N 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.

CONVECTION VALID AT 2030 UTC THU NOV 20...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE COAST OF PANAMA NEAR 09N79W
TO 08N111W, WHERE IT TRANSITIONS TO THE ITCZ EXTENDING TO BEYOND
07N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS NOTED
NORTH OF 05N EAST OF 83W AS WELL AS FROM 05N-08N WEST OF 135W.

$$
.FORECASTER LANDSEA. NATIONAL HURRICANE CENTER.