High Seas Forecast
Issued by NWS

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543
FZPN01 KWBC 262146
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC SUN FEB 26 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

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

SYNOPSIS VALID 1800 UTC FEB 26.
24 HOUR FORECAST VALID 1800 UTC FEB 27.
48 HOUR FORECAST VALID 1800 UTC FEB 28.

.WARNINGS.

...STORM WARNING...
.LOW 60N145W 1020 MB MOVING SE 10 KT. OVER FORECAST WATERS N OF
53N BETWEEN 140W AND 155W WINDS 20 TO 30 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 59N141W 1010 MB. WITHIN 540 NM W AND SW
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.36 HOUR FORECAST LOW 59N144W 997 MB. WITHIN 420 NM W AND SW
QUADRANTS WINDS 35 TO 50 KT. SEAS 12 TO 21 FT.
.48 HOUR FORECAST LOW 57N138W 988 MB. WITHIN 360 NM SW
SEMICIRCLE WINDS 35 TO 50 KT. SEAS 18 TO 28 FT. ELSEWHERE WITHIN
540 NM SW AND 240 NM NE SEMICIRCLES WINDS 25 TO 35 KT. SEAS 12
TO 18 FT.

...GALE WARNING...
.LOW 47N125W 1003 MB NEARLY STATIONARY. OVER FORECAST WATERS
WITHIN 540 NM W AND NW QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO
18 FT.
.24 HOUR FORECAST LOW 48N125W 1007 MB. WITHIN 720 NM W AND SW
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW MOVED INLAND AND ASSOCIATED CONDITIONS
DIMINISHED.

...GALE WARNING...
.LOW 34N164W 1012 MB MOVING NW 15 KT. WITHIN 480 NM N SEMICIRCLE
WINDS 25 TO 35 KT. SEAS 12 TO 20 FT.
.24 HOUR FORECAST LOW 38N168W 1012 MB. WITHIN 480 NM E AND NE
QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 16 FT.
.48 HOUR FORECAST LOW 44N169W 1011 MB. WITHIN 240 NM E AND NE OF
A LINE FROM 46N166W TO 42N159W TO 34N161W WINDS 20 TO 30 KT.
SEAS 8 TO 12 FT.

...GALE WARNING...
.LOW W OF AREA 41N157E 1006 MB MOVING NE 20 KT. OVER FORECAST
WATERS WITHIN 300 NM E SEMICIRCLE WINDS 25 TO 35 KT. SEAS 8 TO
13 FT.
.24 HOUR FORECAST LOW 48N163E 998 MB. WITHIN 660 NM NE QUADRANT
AND FROM 36N TO 50N W OF 169E WINDS 30 TO 45 KT. SEAS 12 TO 21
FT.
.48 HOUR FORECAST LOW NW OF AREA 55N159E 994 MB. OVER FORECAST
WATERS WITHIN 780 NM E AND 540 NM S QUADRANTS WINDS 25 TO 40 KT.
SEAS 12 TO 21 FT.

...HEAVY FREEZING SPRAY WARNING...
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 59N AND
W OF 170W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE
FROM 56N157W TO 58N171W TO 60N179W.

.SYNOPSIS AND FORECAST.

.BOGOSLOF VOLCANO AT 54N168W IS IN A STATE OF UNREST. MARINERS
TRAVELING IN THE VICINITY OF THE 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 32N141W 1014 MB MOVING SE 15 KT. OVER FORECAST WATERS
WITHIN 420 NM N SEMICIRCLE WINDS 20 TO 30 KT. SEAS 9 TO 15 FT.
.24 HOUR FORECAST LOW DISSIPATED S OF AREA. FROM 30N TO 34N
BETWEEN 146W AND 134W WINDS TO 25 KT. SEAS TO 12 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.LOW 37N170E 1012 MB MOVING NE 15 KT. WITHIN 600 NM N QUADRANT
WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 44N171E 1007 MB. WITHIN 300 NM E
SEMICIRCLE WINDS 20 TO 30 FT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 55N159E.

.LOW 59N170W 1024 MB MOVING NE 10 KT. FRONT EXTENDS FROM LOW
CENTER TO 49N180W. WITHIN 420 NM W QUADRANT AND WITHIN 360 NM E
OF THE FRONT WINDS 20 TO 30 KT. SEAS 10 TO 16 FT.
.24 HOUR FORECAST LOW DISSIPATED. N OF 58N AND W OF 166W WINDS
20 TO 30 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.48 HOUR FORECAST NEW LOW 44N180W 1005 MB. WITHIN 420 NM SW AND
240 NM NE SEMICIRCLES WINDS 20 TO 30 KT. SEAS TO 12 FT.

.48 HOUR FORECAST FROM 30N TO 37N W OF 167E WINDS 20 TO 30 KT.
SEAS 8 TO 14 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM SE OF
A LINE FROM 47N176E TO 40N172E.
.24 HOUR FORECAST DENSE FOG FROM 40N TO 50N BETWEEN 178E AND
169E.
.48 HOUR FORECAST DENSE FOG FROM 41N TO 46N BETWEEN 158W AND
171W.

.HIGH 49N158W 1045 MB MOVING SE 10 KT.
.24 HOUR FORECAST HIGH 46N154W 1038 MB.
.48 HOUR FORECAST HIGH 39N146W 1032 MB.

.HIGH 52N174E 1033 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 57N179W 1042 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.FORECASTER NOLT. 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 SUN FEB 26.
24 HOUR FORECAST VALID 1800 UTC MON FEB 27.
48 HOUR FORECAST VALID 1800 UTC TUE FEB 28.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N127W TO 24.5N135W TO 23N140W. N OF 22N W OF
136W WINDS 20 KT OR LESS. SEAS 8 FT IN NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 30N121W TO 23.5N130W TO
23N140W. N OF 29N W OF 137W NE WINDS 20 TO 25 KT. SEAS 9 TO 10
FT IN NW SWELL. ELSEWHERE N OF LINE FROM 28.5N129W TO 30N134W TO
28N140W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST WEAKENING COLD FRONT FROM 31.5N113W TO
27.5N115W TO 20N131W. WITHIN 120 NM NW OF FRONT BETWEEN 123W AND
130W NE WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE N OF LINE
FROM 30N118W TO 25N121W TO 19N134W TO 19N140W WINDS 20 KT OR
LESS. SEAS TO 9 FT IN MIXED NW AND N SWELL.

.FROM 05N TO 16.5N W OF 124W WINDS 20 KT OR LESS. SEAS TO 9 FT
IN MIXED NE WIND WAVES AND NW SWELL. FROM 04N TO 08N BETWEEN
111.5W AND 124W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED NE
WIND WAVES AND NW SWELL.
.24 HOUR FORECAST FROM 08N TO 11N BETWEEN 130W AND 136W WINDS 20
KT OR LESS. SEAS TO 8 FT IN MIXED NE WIND WAVES AND NW SWELL.
.48 HOUR FORECAST FROM 02N TO 16N W OF 125W WINDS 20 KT OR LESS.
SEAS TO 8 FT IN MIXED NW AND NE SWELL.

.12 HOUR FORECAST FROM 10.5N TO 11.5N E OF 87W...INCLUDING THE
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8
FT.
.24 HOUR FORECAST FROM 10N TO 12N E OF 89W...INCLUDING THE GULF
OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST FROM 10N TO 12.5N E OF 89W...INCLUDING THE
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST FROM 10N TO 12N E OF 89.5W...INCLUDING THE
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 9 FT.

.24 HOUR FORECAST COLD FRONT FROM 30N121W TO 23.5N130W TO
23N140W. GULF OF CALIFORNIA N OF 30N S TO SW WINDS 20 TO 25 KT.
SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WEAKENING COLD FRONT FROM 31.5N113W TO
27.5N115W TO 20N131W. GULF OF CALIFORNIA WINDS 20 KT OR LESS.
SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 2030 UTC SUN FEB 26...

.TROUGH FROM 03N86W TO 05N94.5W. SCATTERED MODERATE ISOLATED
STRONG FROM 02N TO 05.5N BETWEEN 84W AND 88.5W. ISOLATED
MODERATE FROM 05N TO 07N BETWEEN 93.5W AND 95.5W.

.TROUGH FROM 05.5N113W TO 09N110W. SCATTERED MODERATE TO STRONG
WITHIN 120 NM EITHER SIDE OF TROUGH.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 04.5N113W TO 02N129W TO 01N140W. SCATTERED MODERATE
ISOLATED STRONG CONVECTION WITHIN 120 NM N OF AXIS BETWEEN 122W
AND 139W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.



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