High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 200334
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC MON FEB 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 20.
24 HOUR FORECAST VALID 0000 UTC FEB 21.
48 HOUR FORECAST VALID 0000 UTC FEB 22.

.WARNINGS.

...HURRICANE FORCE WIND WARNING...
.LOW 46N173E 968 MB MOVING N 20 KT AND RAPIDLY INTENSIFYING.
FRONT EXTENDS FROM LOW CENTER TO 48N175E TO 42N177E TO 30N170E.
WITHIN 240 NM NE AND SW QUADRANTS AND 180 NM E OF THE FRONT N OF
33N WINDS 40 TO 55 KT. SEAS 14 TO 28 FT. ELSEWHERE OVER FORECAST
WATERS WITHIN 540 NM NE...960 NM SE...1020 NM SW...AND 480 NM W
QUADRANTS WINDS 25 TO 40 KT. SEAS 11 TO 22 FT.
.06 HOUR FORECAST LOW 49N174E 958 MB. WITHIN 180 NM SW
SEMICIRCLE WINDS 55 TO 70 KT. SEAS 25 TO 34 FT.
.24 HOUR FORECAST LOW 54N173E 954 MB. FRONT TO EXTEND FROM
57N174E TO 53N171W TO 38N169W TO 32N174W. BETWEEN 90 NM AND 240
NM SE SEMICIRCLE AND 120 NM AND 360 NM NE QUADRANT WINDS 50 TO
65 KT. SEAS 28 TO 36 FT. ELSEWHERE WITHIN 300 NM SE SEMICIRCLE
AND 180 NM NE AND E OF THE FRONT N OF 49N WINDS 40 TO 50 KT.
SEAS 14 TO 20 FT. ALSO WITHIN 540 NM NE...1500 NM SE...480 NM
SW...AND 120 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 25
FT.
.48 HOUR FORECAST LOW NW OF AREA 53N164E 960 MB. N OF 58N AND W
OF 172W WINDS 25 TO 40 KT. SEAS 15 TO 23 FT.

...HURRICANE FORCE WIND WARNING...
.18 HOUR FORECAST LOW W OF AREA 41N152E 979 MB. OVER FORECAST
WATERS WITHIN 660 NM SE QUADRANT WINDS 30 TO 45 KT. SEAS 13 TO
18 FT.
.24 HOUR FORECAST LOW W OF AREA 42N154E 973 MB. WITHIN 480 NM SE
QUADRANT WINDS 40 TO 55 KT. SEAS 18 TO 26 FT. ELSEWHERE WITHIN
360 NM NE AND 720 NM SE QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO
17 FT.
.36 HOUR FORECAST LOW 44N161E 962 MB. OVER FORECAST WATERS
WITHIN 240 NM S QUADRANT WINDS 50 TO 65 KT. SEAS 28 TO 40 FT.
.48 HOUR FORECAST LOW 52N170E 955 MB. FRONT TO EXTEND FROM LOW
CENTER TO 54N175E TO 41N176E TO 31N168E. WITHIN 600 NM S
QUADRANT...240 NM E OF THE FRONT FROM 31N TO 51N...AND FROM 54N
TO 56N W OF 178E WINDS 40 TO 55 KT. SEAS 22 TO 35 FT. ELSEWHERE
WITHIN 420 NM NE...AND 1260 NM SE AND S QUADRANTS WINDS 25 TO 40
KT. SEAS 13 TO 28 FT.

...GALE WARNING...
.LOW 38N134W 997 MB MOVING NE 35 KT. OVER FORECAST WATERS WITHIN
480 NM SE...1140 NM SW...AND 780 NM W QUADRANTS WINDS 25 TO 40
KT. SEAS 12 TO 27 FT.
.24 HOUR FORECAST LOW INLAND AND ASSOCIATED CONDITIONS
DIMINISHED.

...GALE WARNING...
.LOW W OF AREA 51N157E 977 MB MOVING E 10 KT. OVER FORECAST
WATERS BETWEEN 720 NM AND 900 NM NE AND WITHIN 780 NM SE
QUADRANTS WINDS 25 TO 35 KT. SEAS 12 TO 20 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW
54N173E DESCRIBED ABOVE.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 39N130W 1000 MB. OVER FORECAST WATERS
WITHIN 540 NM SE AND 660 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS
10 TO 19 FT.

...GALE WARNING...
.48 HOUR FORECAST NEW LOW 43N158W 1012 MB. FROM 31N TO 47N
BETWEEN 150W AND 164W WINDS 25 TO 40 KT. SEAS 10 TO 21 FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS
N OF A LINE FROM 57N159W TO 56N167W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N AND NE OF A
LINE FROM 58N172W TO 60N178W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N AND NE OF A
LINE FROM 59N175W TO 60N179W.

.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 60N146W 1002 MB NEARLY STATIONARY. WITHIN 180 NM SW
QUADRANT WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LOW 60N146W 1005 MB. WITHIN 360 NM SW QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW 59N140W 1014 MB. OVER FORECAST WATERS
WITHIN 960 NM SE AND 540 NM S QUADRANTS WINDS TO 25 KT. SEAS TO
8 FT.

.LOW 49N126W 994 MB MOVING NE 10 KT. OVER FORECAST WATERS WITHIN
360 NM S QUADRANT WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW INLAND AND ASSOCIATED CONDITIONS
DIMINISHED.

.LOW 52N155W 1005 MB MOVING SE 20 KT. WITHIN 540 NM SW AND 300
NM W QUADRANTS WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 48N144W 1009 MB. WITHIN 840 NM SW QUADRANT
WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW 38N133W 1022 MB. WITHIN 360 NM SW QUADRANT
WINDS TO 25 KT. SEAS 9 TO 13 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 43N TO 49N
BETWEEN 171W AND 173E.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 50N BETWEEN 162W AND
168W.
.48 HOUR FORECATS CONDITIONS IMPROVING.

.DENSE FOG. 24 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
OVER FORECAST WATERS FROM 41N TO 43N W OF 163E.
.48 HOUR FORECAST DENSE FOG FROM 43N TO 53N BETWEEN 174W AND
176E.

.HIGH 31N169W 1029 MB MOVING E 30 KT.
.24 HOUR FORECAST HIGH 32N156W 1028 MB.
.48 HOUR FORECAST HIGH 37N145W 1031 MB.

.HIGH 57N167W 1021 MB MOVING SE 15 KT.
.24 HOUR FORECAST HIGH 53N158W 1018 MB.
.48 HOUR FORECAST HIGH 46N145W 1020 MB.

.24 HOUR FORECAST HIGH 32N174E 1025 MB.
.48 HOUR FORECAST HIGH 36N169W 1031 MB.

.FORECASTER BELL. 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 MON FEB 20.
24 HOUR FORECAST VALID 0000 UTC TUE FEB 21.
48 HOUR FORECAST VALID 0000 UTC WED FEB 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N137W TO 27N140W. N OF 28N WITHIN 90 NM E OF
FRONT SW WINDS 20 TO 25 KT. SEAS 12 TO 15 FT. N OF 28N W OF
FRONT W TO NW WINDS 20 TO 30 KT. SEAS 14 TO 16 FT IN NW SWELL.
NW OF A LINE FROM 30N128W TO 25N140W WINDS 20 KT OR LESS. SEAS 8
TO 12 FT IN NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 30N130W TO 23N136W THEN
STATIONARY TO 21N140W. N OF 22N W OF FRONT WINDS 20 KT OR LESS.
SEAS 12 TO 18 FT IN NW SWELL. NW OF A LINE FROM 30N119W TO
24N130W TO 21N140W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW
SWELL.
.48 HOUR FORECAST COLD FRONT DISSIPATED. N OF 20N W OF A LINE
FROM 30N116W TO 24N115W TO 20N120W WINDS 20 KT OR LESS. SEAS 8
TO 11 FT IN NW SWELL.

.FROM 16N TO 28N BETWEEN 110W AND 123W WINDS 20 KT OR LESS. SEAS
12 TO 14 FT IN MIXED SWELL. ELSEWHERE WITHIN AREA BOUNDED BY
LINE FROM 23N110W TO 20N107W TO 08N121W TO 20N140W WINDS 20 KT
OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.24 HOUR FORECAST FROM 06N TO 25W BETWEEN 103W AND 131W AND FROM
11.5N TO 14N W OF 132W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN
MIXED SWELL.
.48 HOUR FORECAST BETWEEN 08N AND 20N W OF 120W WINDS 20 KT OR
LESS. SEAS 8 TO 11 FT IN MIXED SWELL.

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

CONVECTION VALID AT 0300 UTC MON FEB 20...

.SURFACE TROUGH FROM 15N106W TO 11N108W. SCATTERED MODERATE
WITHIN 100 NM EITHER SIDE OF TROUGH.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 06N90W TO 05N104W. ITCZ RESUMES FROM 08N113W TO BEYOND
02N140W. NO SIGNIFICANT CONVECTION.

$$

.FORECASTER ERA. NATIONAL HURRICANE CENTER.



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