000
FZPN01 KWBC 201558
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC TUE APR 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC APR 20.
24 HOUR FORECAST VALID 1200 UTC APR 21.
48 HOUR FORECAST VALID 1200 UTC APR 22.

.WARNINGS.

...STORM WARNING...
.LOW 42N159W 1000 MB MOVING N 15 KT. WITHIN 720 NM E AND 780 NM S
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW 49N159W 985 MB. WITHIN 600 NM N...480 NM
NE...660 NM SE...AND 780 NM SW QUADRANTS AND ELSEWHERE WITHIN 120
NM E OF A FRONT FROM 40N146W TO 32N150W WINDS 30 TO 45 KT. SEAS
10 TO 20 FT.
.30 HOUR FORECAST LOW 50N161W 986 MB. WITHIN 90 NM NW OF A LINE
FROM 56N154W TO 53N165W WINDS 40 TO 50 KT. SEAS 14 TO 21 FT.
.48 HOUR FORECAST LOW 52N163W 992 MB. N OF 41N BETWEEN 150W AND
176W AND WITHIN 120 NM NE AND E OF A FRONT TO EXTEND FROM 56N152W
TO 50N140W TO 40N142W WINDS 25 TO 40 KT. SEAS 9 TO 18 FT.

...GALE WARNING...
.LOW 50N163W 1000 MB MOVING SW 10 KT. BETWEEN 300 NM AND 540 NM
NE...240 NM AND 600 NM SW...AND 300 NM AND 780 NM NW QUADRANTS
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW
49N159W DESCRIBED ABOVE.

...GALE WARNING...
.WITHIN 300 NM NE AND E OF A FRONT FROM 51N161E TO 40N163E TO
34N161E AREA OF SE TO S WINDS 25 TO 35 KT. SEAS 9 TO 16 FT.
.24 HOUR FORECAST CONDITIONS DESCRIBED WITH LOW 43N167E BELOW.

...GALE WARNING...
.FROM 30N TO 53N BETWEEN 118W AND 132W AREA OF NW TO N WINDS 20
TO 30 KT. SEAS 8 TO 15 FT.
.06 HOUR FORECAST FROM 32N TO 50N BETWEEN 119W AND 131W AREA OF
NW TO N WINDS 25 TO 35 KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST FROM 32N TO 53N BETWEEN 120W AND 132W AREA OF
NW TO N WINDS 25 TO 35 KT. SEAS 8 TO 17 FT.
.48 HOUR FORECAST FROM 32N TO 53N BETWEEN 123W AND 131W AREA OF
NW TO N WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 43N167E 1000 MB. FROM 37N TO 46N
BETWEEN 173E AND 166E WINDS 25 TO 40 KT. SEAS 8 TO 15 FT.
ELSEWHERE WITHIN 600 NM N...360 NM E AND 840 NM S QUADRANTS WINDS
20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 44N167E 1000 MB. WITHIN 240 NM N OF A LINE
FROM 45N163E TO 43N179E AND FROM 30N TO 43N BETWEEN 178W AND 172E
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.

...ASHFALL ADVISORY...
THE ALASKA VOLCANO OBSERVATORY HAS DETECTED LOW LEVEL ERUPTIVE
ACTIVITY BY INFRASOUND AND SATELLITE DATA FROM THE SEMISOPOCHNOI
VOLCANO LOCATED ABOUT 160 MILES NORTHWEST OF ADAK. NORTHEASTERLY
WINDS ALOFT WILL CONTINUE THROUGH TONIGHT. THIS WILL ALLOW THE
PLUME TO MOVE OVER MARINE AREAS SOUTH-SOUTHWEST OF THE WESTERN
ALEUTIANS INCLUDING AMCHITKA ISLAND. MOST OF THE ASHFALL WILL BE
IN BETWEEN SEMISOPOCHNOI AND AMCHITKA ISLAND AND IS EXPECTED TO
BE OF TRACE AMOUNTS. MARINERS SHOULD EXERCISE CAUTION. IF
MARINERS ENCOUNTER VOLCANIC ASH PLEASE REPORT THE OBSERVATION TO
THE OCEAN PREDICTION CENTER BY CALLING 301 683 1520.

.SYNOPSIS AND FORECAST.

.LOW 52N153W 1012 MB MOVING NE 20 KT. WITHIN 360 NM W AND NW
QUADRANTS AND FROM 48N TO 55N BETWEEN 142W AND 154W WINDS 20 TO
30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW
49N159W IN WARNINGS SECTION ABOVE.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 50N
BETWEEN 163W AND 174W...FROM 44N TO 49N BETWEEN 151W AND 156W AND
WITHIN 90 NM W OF A LINE FROM 50N161E TO 41N164E.
.24 HOUR FORECAST DENSE FOG FROM 46N TO 51N BETWEEN 155W AND
160W...FROM 55N TO 57N BETWEEN 145W AND 154W...FROM 43N TO 48N
BETWEEN 143W AND 147W AND FROM 41N TO 48N BETWEEN 168E AND 162E.

.48 HOUR FORECAST DENSE FOG WITHIN 120 NM E OF A LINE FROM
55N150W TO 46N141W...WITHIN 90 NM E OF A LINE FROM 54N175W TO
48N169W AND FROM 44N TO 47N W OF 167E.

.HIGH 44N175E 1031 MB MOVING SE 25 KT.
.24 HOUR FORECAST HIGH 36N178W 1024 MB.
.48 HOUR FORECAST HIGH 34N166W 1025 MB.

.HIGH 45N137W 1035 MB MOVING N 15 KT.
.24 HOUR FORECAST HIGH 50N137W 1032 MB.
.48 HOUR FORECAST HIGH DISSIPATED WITH NEW HIGH 40N136W 1029 MB.

.FORECASTER KOSIER. 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 1200 UTC TUE APR 20.
24 HOUR FORECAST VALID 1200 UTC WED APR 21.
48 HOUR FORECAST VALID 1200 UTC THU APR 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.N OF 28N BETWEEN 122W AND 131W N WINDS 20 TO 25 KT. SEAS TO 8
FT. FROM 21N TO 28N W OF 128W NE TO E WINDS 20 TO 25 KT. SEAS TO
9 FT. ELSEWHERE FROM 07N TO 21N AND W OF A LINE FROM 21N134W TO
10N138W TO 07N138W TO 07N140W WINDS 20 KT OR LESS. SEAS 8 FT IN
NE SWELL.
.12 HOUR FORECAST FROM 11N TO 27N AND W OF A LINE FROM 27N132W
TO 20N132W TO 11N134W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW
SWELL.
.24 HOUR FORECAST FROM 19N TO 25N W OF 134W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN NE SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.12 HOUR FORECAST N OF A LINE FROM 30N118W TO 28N120W TO 27N128W
TO 27N132W TO 30N131W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW
TO N SWELL.
.24 HOUR FORECAST N OF 27N BETWEEN 118W AND 131W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN NW TO N SWELL.
.48 HOUR FORECAST N OF 28N BETWEEN 118W AND 129W WINDS 20 KT OR
LESS. SEAS 8 FT IN NW TO N SWELL.

.S OF 01S BETWEEN 111W AND 115W WINDS 20 KT OR LESS. SEAS 8 FT
IN S TO SW SWELL.
.12 HOUR FORECAST S OF 00N BETWEEN 110W AND 120W...AND S OF 01S
BETWEEN 100W AND 110W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN S
TO SW SWELL.
.24 HOUR FORECAST S OF 02N BETWEEN 103W AND 120W...AND S OF 01N
BETWEEN 98W AND 103W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN S TO
SW SWELL. S OF 02S BETWEEN 89W AND 96W WINDS 20 KT OR LESS. SEAS
8 IN S TO SW SWELL.
.48 HOUR FORECAST S OF 01S BETWEEN 84W AND 87W...AND S OF 00N
BETWEEN 90W AND 120W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN S
SWELL. FROM 00N TO 05N BETWEEN 95W AND 108W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN S SWELL.

.GULF OF CALIFORNIA 18 HOUR FORECAST N OF 30N S TO SW WINDS 20
TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST COLD FRONT FROM 32N114W TO 30N115W. N OF 30N E
OF FRONT S TO SW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.24 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8
FT.
.48 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 15N95W TO
13N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO
25 KT. SEAS 8 FT.

.42 HOUR FORECAST FROM 10N TO 12N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS 8 FT.
.48 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.

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

CONVECTION VALID AT 1500 UTC TUE APR 20...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM NORTHERN COLOMBIA NEAR 10N74W TO
06N90W TO 06N107W. THE ITCZ AXIS EXTENDS FROM 06N107W TO 05N130W
TO 04N140W. SCATTERED MODERATE CONVECTION CAN BE FOUND FROM 02N
TO 05N BETWEEN 80W AND 86W...FROM 05N TO 09N BETWEEN 107W AND
118W...AND FROM 05N TO 07N BETWEEN 120W AND 132W.


.FORECASTER GR. NATIONAL HURRICANE CENTER.

$$