High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 210332
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC FEB 21.
24 HOUR FORECAST VALID 0000 UTC FEB 22.
48 HOUR FORECAST VALID 0000 UTC FEB 23.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.LOW W OF AREA 42N157E 975 MB MOVING NE 30 KT. OVER FORECAST
WATERS WITHIN 480 NM SE QUADRANT WINDS 40 TO 50 KT. SEAS 14 TO
24 FT. ELSEWHERE WITHIN 660 NM SE QUADRANT WINDS 25 TO 40 KT.
SEAS 10 TO 18 FT.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN LOW 45N169E 962 MB.
WITHIN 240 NM S QUADRANT WINDS 50 TO 65 KT. SEAS 24 TO 38 FT.
ALSO WITHIN 480 NM S AND 240 NM W QUADRANTS...AND WITHIN 360 NM
E OF A FRONT FROM 51N176E TO 41N175E TO 30N167E WINDS 40 TO 55
KT. SEAS 14 TO 28 FT. ELSEWHERE EXCEPT WHERE NOTED BELOW FROM
30N TO 56N W OF 171W WINDS 25 TO 40 KT. SEAS 11 TO 22 FT.
.48 HOUR FORECAST LOW 54N168E 949 MB. FRONT TO EXTEND FROM
58N173W TO 45N171W TO 39N171W TO 30N178W. OVER FORECAST WATERS
WITHIN 480 NM S AND 360 NM E QUADRANTS...AND 180 NM E OF THE
FRONT N OF 39N WINDS 40 TO 55 KT. SEAS 15 TO 30 FT. ELSEWHERE N
OF 30N W OF 163W WINDS 25 TO 40 KT. SEAS 10 TO 22 FT.

...STORM WARNING...
.LOW 54N173E 954 MB MOVING W 15 KT. OVER FORECAST WATERS WITHIN
240 NM E...360 NM S AND 420 NM N QUADRANTS WINDS 40 TO 55 KT.
SEAS 18 TO 33 FT. ELSEWHERE WITHIN 480 NM SW...540 NM N AND 1080
NM S QUADRANTS AND 360 NM NE AND E OF FRONT FROM 56N178W TO
45N169W TO 37N169W TO 30N174W WINDS 25 TO 40 KT. SEAS 12 TO 24
FT...EXCEPT E OF THE FRONT 9 TO 18 FT.
.24 HOUR FORECAST LOW W OF AREA 53N164E 961 MB. OVER FORECAST
WATERS WITHIN 420 NM SW QUADRANT WINDS 25 TO 40 KT. SEAS 14 TO
20 FT.
.48 HOUR FORECAST LOW ABSORBED INTO LOW 54N168E WITH CONDITIONS
DESCRIBED ABOVE.

...GALE WARNING...
.LOW 39N129W 998 MB MOVING NE 20 KT. FROM 30N TO 40N BETWEEN
121W AND 140W WINDS 25 TO 35 KT. SEAS 10 TO 20 FT.
.24 HOUR FORECAST LOW DISSIPATED INLAND. FROM 30N TO 40N BETWEEN
120W AND 130W WINDS TO 25 KT. SEAS 9 TO 13 FT.
.36 HOUR FORECAST CONDITIONS DIMINISHED.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 48N159W 1009 MB. FROM 32N TO THE
ALEUTIAN ISLANDS BETWEEN 150W AND 164W WINDS 25 TO 40 KT. SEAS 9
TO 20 FT...HIGHEST NEAR 46N161W.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 38N154W 1018 MB.
WITHIN 240 NM W SEMICIRCLE...AND 180 NM NE AND E OF A LINE FROM
41N151W TO 39N145W TO 34N144W WINDS 25 TO 35 KT. SEAS 9 TO 19
FT....HIGHEST IN W SEMICIRCLE.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 58N174W 996 MB. WITHIN 360 NM N
SEMICIRCLE AND 240 NM SE QUADRANT WINDS 25 TO 35 KT. SEAS IN ICE
FREE WATERS 10 TO 20 FT.
.48 HOUR FORECAST LOW ABSORBED INTO LOW 54N168E WITH CONDITIONS
DESCRIBED ABOVE.

...GALE WARNING...
.48 HOUR FORECAST NEW LOW 59N146W 1014 MB. WITHIN 90 NM N...180
NM W AND 420 NM S QUADRANT WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS
FROM 56N 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 58N TO 60N BETWEEN
143W AND 153W AREA OF W TO SW WINDS 20 TO 30 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

.LOW 46N141W 1007 MB MOVING SE 25 KT. FROM 34N TO 48N BETWEEN
145W AND 151W AREA OF W TO NW WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 37N135W 1021 MB. WITHIN 240 NM SW
SEMICIRCLE WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

.LOW 57N147W 1010 MB MOVING NE 10 KT. WITHIN 240 NM SW QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 58N140W 1013 MB. OVER FORECAST WATERS E OF
A LINE FROM 58N147W TO 51N141W TO 48N131W AREA OF NW WINDS TO 25
KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW DISSIPATED. FROM 42N TO 52N BETWEEN 125W
AND 134W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS TO 10 FT.

.48 HOUR FORECAST OVER FORECAST WATERS E OF A LINE FROM 40N126W
TO 34N124W TO 30N122W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS 8
TO 12 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 41N TO 50N
BETWEEN 162W AND 169W.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 52N BETWEEN 174W AND
174E.
.48 HOUR FORECAST DENSE FOG FROM 55N TO 60N BETWEEN 169W AND
175W AND FROM 36N TO 51N BETWEEN 169W AND 172W.

.HIGH 31N176E 1025 MB MOVING NE 35 KT.
.24 HOUR FORECAST HIGH 36N167W 1032 MB.
.48 HOUR FORECAST HIGH 34N162W 1032 MB.

.HIGH 31N158W 1028 MB MOVING E 30 KT.
.24 HOUR FORECAST HIGH 31N148W 1031 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 52N156W 1019 MB MOVING SE 25 KT.
.24 HOUR FORECAST HIGH 45N144W 1030 MB.
.48 HOUR FORECAST HIGH 47N142W 1038 MB.

.48 HOUR FORECAST NEW HIGH 47N158W 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 0000 UTC TUE FEB 21.
24 HOUR FORECAST VALID 0000 UTC WED FEB 22.
48 HOUR FORECAST VALID 0000 UTC THU FEB 23.

.WARNINGS.

...GALE WARNING...
.24 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 25 KT. SEAS
LESS THAN 8 FT.
.30 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 N OF 13N BETWEEN 94W AND 96.5W N TO NE WINDS 20 TO 30
KT. SEAS TO 8 FT.
.36 HOUR FORECAST WITHIN 30 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 12 FT.
.42 HOUR FORECAST FROM 11N TO 15N BETWEEN 94W AND 98W WINDS 20
KT OR LESS. SEAS TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST LITTLE CHANGE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N127W TO 21N140W. N OF 29N WITHIN 45 NM E OF
FRONT WINDS 20 KT OR LESS. SEAS 12 TO 14 FT IN MIXED SWELL. N OF
22N W OF FRONT WINDS 20 KT OR LESS. SEAS 12 TO 18 FT IN NW
SWELL...HIGHEST NW PART. ELSEWHERE NW OF LINE FROM 30N119W TO
24N127W TO 23N133W TO 21N140W WINDS 20 KT OR LESS. SEAS 8 TO 12
FT IN MIXED SWELL.
.24 HOUR FORECAST COLD FRONT DISSIPATED. W OF A LINE FROM
30N116W TO 20N120W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED
SWELL.
.48 HOUR FORECAST N OF 28W E OF 118W NW WINDS 20 TO 25 KT. SEAS
10 TO 12 FT. ELSEWHERE W OF 113W WINDS 20 KT OR LESS. SEAS 8 TO
10 KT IN MIXED SWELL.

.FROM 06N AND 25N BETWEEN 102W AND 131W WINDS 20 KT OR LESS.
SEAS 8 TO 10 FT MIXED SWELL.
.24 HOUR FORECAST FROM 08N TO 20N W OF 120W WINDS 20 KT OR LESS.
SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST FROM 06N TO 20N W OF A LINE FROM 20N116W TO
06N126W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.

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

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

ITCZ FROM 09N125W TO BEYOND 04N140W. NO SIGNIFICANT CONVECTION.

$$

.FORECASTER ERA. NATIONAL HURRICANE CENTER.



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