High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 210939
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC TUE FEB 21 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

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

SYNOPSIS VALID 0600 UTC FEB 21.
24 HOUR FORECAST VALID 0600 UTC FEB 22.
48 HOUR FORECAST VALID 0600 UTC FEB 23.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.LOW 43N160E 970 MB MOVING NE 25 KT. OVER FORECAST WATERS WITHIN
540 NM SE QUADRANT WINDS 40 TO 55 KT. SEAS 16 TO 30 FT.
ELSEWHERE WITHIN 180 NM NE AND 840 NM SE QUADRANTS WINDS 25 TO
40 KT. SEAS 11 TO 20 FT.
.18 HOUR FORECAST LOW 46N169E 962 MB. WITHIN 300 NM S QUADRANT
WINDS 50 TO 65 KT. SEAS 20 TO 34 FT.
.24 HOUR FORECAST LOW 52N168E 949 MB. FRONT TO EXTEND FROM
51N178E TO 43N180W TO 32N175E. WITHIN 600 NM S QUADRANT...N OF
55N W OF 180W AND WITHIN 300 NM E OF FRONT WINDS 40 TO 55 KT.
SEAS 20 TO 34 FT. ELSEWHERE W OF A LINE FROM 30N171W TO 49N167W
TO 61N166W WINDS 25 TO 40 KT. SEAS IN ICE FREE WATERS 10 TO 24
FT.
.48 HOUR FORECAST LOW 55N171E 955 MB. FRONT TO EXTEND FROM
62N176W TO 51N169W TO 40N170W TO 31N175W. OVER FORECAST WATERS
WITHIN 360 NM SE AND 600 NM SW QUADRANTS...AND 180 NM E OF THE
FRONT N OF 40N WINDS 40 TO 50 KT. SEAS 16 TO 32 FT. ELSEWHERE N
OF 36N W OF 177W AND WITHIN 300 NM E OF FRONT WINDS 25 TO 40 KT.
SEAS 10 TO 22 FT.

...GALE WARNING...
.LOW 54N171E 960 MB MOVING W 15 KT. FRONT EXTENDS FROM 57N175E
TO 54N170W TO 43N164W TO 31N170W. OVER FORECAST WATERS WITHIN
180 NM N AND NW SEMICIRCLES AND WITHIN 240 NM NE AND E OF FRONT
WINDS 35 TO 45 KT. SEAS 13 TO 27 FT...HIGHEST IN N SEMICIRCLE.
ELSEWHERE WITHIN AND AREA BOUNDED BY A LINE FROM 52N165E TO
30N171W TO 30N163W TO 54N158W TO 62N175W TO 52N165E WINDS 25 TO
35 KT. SEAS 10 TO 22 FT...EXCEPT E OF THE FRONT 8 TO 16 FT.
.24 HOUR FORECAST LOW ABSORBED INTO LOW 52N168E WITH CONDITIONS
DESCRIBED ABOVE.

...GALE WARNING...
.LOW 42N125W 1002 MB MOVING NE 20 KT. OVER FORECAST WATERS
WITHIN 300 NM SW AND 600 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS
9 TO 18 FT.
.24 HOUR FORECAST LOW DISSIPATED INLAND WITH CONDITIONS
DIMINISHED.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 46N157W 1016 MB. FROM 33N TO THE
ALEUTIAN ISLANDS BETWEEN 148W AND 161W WINDS 25 TO 35 KT. SEAS 9
TO 19 FT...HIGHEST NEAR 44N158W.
.48 HOUR FORECAST LOW 39N150W 1020 MB. FRONT TO EXTEND FROM
40N150W TO 39N144W TO 34N144W. BETWEEN 120 NM AND 300 NM S
SEMICIRCLE AND WITHIN N AND NE OF FRONT WINDS 25 TO 35 KT. SEAS
10 TO 18 FT.

...GALE WARNING...
.48 HOUR FORECAST NEW LOW 58N143W 1017 MB. WITHIN 180 NM SW AND
360 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS
FROM 55N TO 59N BETWEEN 150W AND 165W AND N OF 59N W OF 172W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 59N W OF
172W.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.SYNOPSIS AND FORECAST.

.BOGOSLOF VOLCANO AT 54N168W IS IN A STATE OF UNREST. MARINERS
TRAVELING IN THE VICINITY OF BOGOSLOF VOLCANO ARE URGED TO
EXERCISE CAUTION. IF MARINERS ENCOUNTER ANY VOLCANIC
ASH...REPORT THE OBSERVATION TO THE OCEAN PREDICTION CENTER BY
CALLING 301-683-1520.

.LOW 61N147W 1005 MB NEARLY STATIONARY. FROM 57N TO 60N BETWEEN
144W AND 154W AREA OF W TO SW WINDS 20 TO 30 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

.LOW 45N138W 1011 MB MOVING SE 25 KT. FROM 34N TO 45N BETWEEN
142W AND 149W AREA OF W TO NW WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 36N133W 1024 MB. WITHIN 180 NM S AND 240
NM W QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

.LOW 58N143W 1005 MB MOVING SE 10 KT. FROM 55N TO 57N BETWEEN
143W AND 154W WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 57N137W 1014 MB. OVER FORECAST WATERS E
AND NE OF A LINE FROM 56N144W TO 49N138W TO 47N130W AREA OF NW
WINDS TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW INLAND 47N124W 1020 MB. FROM 40N TO 51N
BETWEEN 133W AND 124W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS TO
11 FT.

.24 HOUR FORECAST OVER FORECAST WATERS FROM 30N TO 34N E OF 123W
AREA OF N TO NW WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST E OF A LINE FROM 40N128W TO 35N124W TO 30N124W
AREA OF N TO NW WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 41N TO 44N
BETWEEN 161E AND 168E AND FROM 41N TO 50N BETWEEN 161W AND 166W.
.24 HOUR FORECAST DENSE FOG FROM 43N TO 55N BETWEEN 171W AND
175E.
.48 HOUR FORECAST DENSE FOG FROM 35N TO 49N BETWEEN 166W AND
170W.

.HIGH 32N177W 1025 MB MOVING NE 25 KT.
.24 HOUR FORECAST HIGH 35N164W 1033 MB.
.48 HOUR FORECAST HIGH 33N161W 1032 MB.

.HIGH 32N154W 1031 MB MOVING NE 25 KT.
.24 HOUR FORECAST HIGH 35N142W 1033 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 47N152W 1023 MB MOVING SE 15 KT.
.24 HOUR FORECAST HIGH 45N143W 1033 MB.
.48 HOUR FORECAST HIGH 47N143W 1038 MB.

.48 HOUR FORECAST HIGH 31N164E 1028 MB.

.48 HOUR FORECAST NEW HIGH 52N154W 1033 MB.

.FORECASTER KOSIER. 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 0600 UTC TUE FEB 21.
24 HOUR FORECAST VALID 0600 UTC WED FEB 22.
48 HOUR FORECAST VALID 0600 UTC THU FEB 23.

.WARNINGS.

...GALE WARNING...
.18 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W
TO 15N95W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35
KT. SEAS LESS THAN 8 FT. ELSEWHERE WITHIN 45 NM EITHER SIDE OF
LINE FROM 16N95W TO 15N45W TO 14N96W WINDS 20 TO 30 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 30 TO 35 KT. SEAS 8 TO 11 FT.
ELSEWHERE WITHIN 60 NM EITHER SIDE OF LINE 16N95W TO 14N95W TO
13N95.5W N TO NE WINDS 20 TO 30 KT. SEAS TO 9 FT.
.30 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W
TO 14.5N95W TO 13N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO
NE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST FROM 10N TO 12N BETWEEN 96W AND 98W WINDS 20
KT OR LESS. SEAS TO 8 FT IN MIXED NW AND NE SWELL.

.SYNOPSIS AND FORECAST.

.DISSIPATING COLD FRONT FROM 30N126W TO 21N140W. W OF FRONT
WINDS 20 KT OR LESS. SEAS 10 TO 17 FT. ELSEWHERE NW OF LINE
30N117W TO 18N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW
SWELL.
.24 HOUR FORECAST COLD FRONT DISSIPATED. W OF A LINE FROM
30N116W TO 23N115W TO 09N122W WINDS 20 KT OR LESS. SEAS 8 TO 11
FT IN MIXED NW AND NE SWELL.
.48 HOUR FORECAST N OF 25W E OF 119W NW WINDS 20 TO 25 KT. SEAS
9 TO 11 FT. ELSEWHERE W OF A LINE FROM 30N116W TO 24N112W TO
08N124W...EXCEPT N OF 25N W OF 128W WINDS 20 KT OR LESS. SEAS 8
TO 10 KT IN MIXED NW AND NE SWELL.

.WITHIN AREA BOUNDED BY 17N129W TO 21N112W TO 16N101W TO 05N109W
TO 07N131W TO 05N109W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
IN MIXED NW AND NE SWELL.
.24 HOUR FORECAST CONDITIONS MERGED ABOVE.

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

CONVECTION VALID AT 0900 UTC TUE FEB 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THERE IS NO ITCZ OVER THE FORECAST WATERS NORTH OF THE EQUATOR.
NO SIGNIFICANT CONVECTION.

$$

.FORECASTER AL. NATIONAL HURRICANE CENTER.



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