High Seas Forecast
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
077
FZPN01 KWBC 212158
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC WED APR 21 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

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 APR 21.
24 HOUR FORECAST VALID 1800 UTC APR 22.
48 HOUR FORECAST VALID 1800 UTC APR 23.

.WARNINGS.

...GALE WARNING...
. FROM 33N TO 44N BETWEEN 124W AND 130W WINDS 25 TO 35 KT. SEAS 8
TO 14 FT. ELSEWHERE FROM 30N TO 53N BETWEEN 119W AND 134W WINDS
TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 30N TO 52N BETWEEN 120W AND 132W WINDS 20
TO 30 KT. SEAS TO 9 FT.
.48 HOUR FORECAST CONDITIONS IMPROVED.

...GALE WARNING...
.LOW 50N162W 985 MB NEARLY STATIONARY. WITHIN 480 NM NW...600 NM
NE...480 NM SE AND 360 NM SW QUADRANTS WINDS 30 TO 45 KT. SEAS 8
TO 19 FT. ELSEWHERE WITHIN 660 NM N SEMICIRCLE...AND WITHIN 1260
NM SE AND 1020 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 13
FT.
.24 HOUR FORECAST LOW 50N162W 994 MB. WITHIN 540 NM S SEMICIRCLE
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE WITHIN 660 NM
NW...780 NM NE...1320 NM SE AND 780 NM SW QUADRANTS WINDS TO 25
KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW 51N157W 1004 MB. WITHIN 1080 NM SE AND 660
NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.

...GALE WARNING...
.LOW 43N167E 999 MB MOVING NE 10 KT. WITHIN 120 NM W
SEMICIRCLE...AND 300 NM NE...720 NM SE QUADRANTS WINDS 25 TO 40
KT. SEAS 8 TO 14 FT. ELSEWHERE WITHIN 300 NM NW...600 NM NE...900
NM SE...AND 840 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 43N170E 1000 MB. WITHIN 300 NM OF LOW
CENTER WINDS TO 25 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW AND CONDITIONS DESCRIBED WITH NEW LOW
43N177W BELOW.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 33N174E 998 MB. WITHIN 600 NM NE AND
300 NM SE QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 13 FT. ELSEWHERE
FROM 30N TO 40N BETWEEN 173W AND 165E WINDS TO 25 KT. SEAS TO 8
FT.
.48 HOUR FORECAST LOW 43N175W 996 MB. WITHIN 660 NM SE QUADRANTS
WINDS 25 TO 40 KT. SEAS 8 TO 14 FT. ELSEWHERE WITHIN 840 NM S
SEMICIRCLE WINDS TO 25 KT. SEAS TO 8 FT.

...GALE WARNING...
.48 HOUR FORECAST LOW 33N161E 984 MB. WITHIN 480 NM E SEMICIRCLE
WINDS 25 TO 40 KT. SEAS 9 TO 21 FT...HIGHEST IN SE QUADRANT.
ELSEWHERE FROM 30N TO 46N W OF 174E WINDS TO 25 KT. SEAS 8 TO 14
FT.

.SYNOPSIS AND FORECAST.

.SEMISOPOCHNOI VOLCANO NEAR 52N180W IS IN A STATE OF UNREST.
MARINERS ARE URGED TO EXERCISE CAUTION. IF YOU ENCOUNTER ANY
ASH...PLEASE REPORT THE OBSERVATION TO THE OCEAN PREDICTION
CENTER BY CALLING 301 683 1520.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 53N
BETWEEN 144W AND 150W AND FROM 48N TO 53N BETWEEN 154W AND 168W.
.24 HOUR FORECAST DENSE FOG FROM 44N TO 56N BETWEEN 137W AND 149W
AND FROM 42N TO 45N BETWEEN 177W AND 177E.
.48 HOUR FORECAST DENSE FOG FROM 32N TO 39N BETWEEN 173W AND 179W
AND FROM 41N TO 49N BETWEEN 167W AND 180W AND FROM 57N TO 60N
BETWEEN 165W AND 178E.

.HIGH 58N141W 1031 MB MOVING SE 15 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 46N133W 1034 MB MOVING S 25 KT.
.24 HOUR FORECAST HIGH 39N135W 1028 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 31N161W 1024 MB 31N164W MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 33N154W 1025 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 33N173W 1024 MB MOVING E 05 KT.
.24 HOUR FORECAST HIGH 33N164W 1027 MB.
.48 HOUR FORECAST HIGH 34N154W 1028 MB.

.FORECASTER HOLLEY. OCEAN PREDICTION CENTER.

NWS 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 WED APR 21.
24 HOUR FORECAST VALID 1800 UTC THU APR 22.
48 HOUR FORECAST VALID 1800 UTC FRI APR 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FROM 19N TO 23N W OF 137W WINDS 20 KT OR LESS. SEAS 8 FT IN NE
SWELL. FROM 07N TO 10N BETWEEN 134W AND 138W WINDS 20 KT OR
LESS. SEAS 8 FT IN MIXED NE AND S SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 08N TO 11N W OF 130W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN MIXED NE AND S SWELL.

.N OF 28N BETWEEN 118W AND 131W WINDS 20 KT OR LESS. SEAS 8 TO 9
FT IN NW TO N SWELL.
.24 HOUR FORECAST N OF 29N BETWEEN 120W AND 128W WINDS 20 KT OR
LESS. SEAS 8 FT IN NW TO N SWELL.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.S OF 03N BETWEEN 104W AND 120W...AND S OF 01N BETWEEN 95W AND
104W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN S TO SW SWELL. S OF
00S BETWEEN 88W AND 95W...EXCEPT IN THE LEE OF THE GALAPAGOS
ISLANDS WINDS 20 KT OR LESS. SEAS 8 FT IN S TO SW SWELL.
.24 HOUR FORECAST S OF 01N BETWEEN 110W AND 120W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN S SWELL. S OF 06N BETWEEN 102W AND 107W
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN S SWELL. S OF 02N BETWEEN
95W AND 98W WINDS 20 KT OR LESS. SEAS 8 FT IN S SWELL. S OF 02N
BETWEEN 92W AND 95W...AND S OF 01.5S BETWEEN 82W AND 92W WINDS
20 KT OR LESS. SEAS 8 FT IN S TO SW SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.GULF OF CALIFORNIA N OF 30N S TO SW WINDS 20 TO 25 KT. SEAS
LESS THAN 8 FT.
.12 HOUR FORECAST GULF OF CALIFORNIA N OF 30N S TO SW WINDS 20
TO 30 KT. SEAS TO 8 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.N OF 14N BETWEEN 94.5W AND 95.5W...INCLUDING THE GULF OF
TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.12 HOUR FORECAST N OF 14N BETWEEN 94.5W AND 95.5W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.
.18 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 15N95W TO
12N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO
25 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST GULF OF TEHUANTEPEC WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT. FROM 11N TO 14N BETWEEN 94W AND 97W WINDS 20 KT
OR LESS. SEAS 8 TO 10 FT IN MIXED NE AND S SWELL.
.48 HOUR FORECAST FROM 08N TO 12N BETWEEN 94W AND 97W WINDS 20
KT OR LESS. SEAS 8 TO 9 FT PRIMARILY IN S TO SW SWELL.

.12 HOUR FORECAST FROM 10N TO 11.5N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 21 KT. SEAS TO 8 FT.
.18 HOUR FORECAST FROM 10N TO 12N E OF 92W...INCLUDING THE GULF
OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST LITTER CHANGE.
.36 HOUR FORECAST FROM 10N TO 12N E OF 90W...INCLUDING THE GULF
OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. FROM
07N TO 11N BETWEEN 90W AND 93W WINDS 20 KT OR LESS. SEAS 8 TO 9
FT IN MIXED NE AND S SWELL.
.48 HOUR FORECAST FROM 10N TO 12N E OF 93W...INCLUDING THE GULF
OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 2100 UTC WED APR 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM NORTHERN COLOMBIA NEAR 10N74W TO
08N90W TO 09N105W TO 07N114W. THE ITCZ AXIS CONTINUES FROM
07N114W TO 06N130W TO 05N140W. SCATTERED MODERATE ISOLATED
STRONG CONVECTION IS NOTED FROM 02N-06N BETWEEN 78W-90W...FROM
04N-09N BETWEEN 98W-117W...FROM 04N-10N BETWEEN 120W-132W...AND
FROM 03N-06N W OF 132W.


.FORECASTER GR. NATIONAL HURRICANE CENTER.

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.