High Seas Forecast
Issued by NWS

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392
FZPN01 KWBC 200338
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC FRI OCT 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).

THE U.S. COAST GUARD IS CURRENTLY EXPERIENCING DEGRADATION IN
IMAGE QUALITY OF ALL HFFAX PRODUCTS. TROUBLESHOOTING OF THE
PROBLEM IS TAKING PLACE.

SECURITE

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

SYNOPSIS VALID 0000 UTC OCT 20.
24 HOUR FORECAST VALID 0000 UTC OCT 21.
48 HOUR FORECAST VALID 0000 UTC OCT 22.

.WARNINGS.

...STORM WARNING...
.LOW 52N177E 981 MB MOVING E 35 KT. WITHIN 420 NM S AND SW...AND
300 NM N AND NW QUADRANTS WINDS 40 TO 55 KT. SEAS 18 TO 35 FT.
ELSEWHERE WITHIN 660 NM S AND 360 NM N SEMICIRCLES WINDS 25 TO
40 KT. SEAS 10 TO 28 FT...HIGHEST S QUADRANT.
.24 HOUR FORECAST LOW 53N161W 977 MB. WITHIN 780 NM SW AND S AND
420 NM W QUADRANTS WINDS 35 TO 45 KT. SEAS 16 TO 32 FT.
ELSEWHERE OVER FORECAST WATERS N OF A LINE FROM 50N160E TO
38N172W TO 42N154W WINDS 25 TO 40 KT. SEAS 10 TO 26 FT.
.48 HOUR FORECAST LOW 54N144W 970 MB. FRONT FROM LOW TO 56N140W
TO 50N130W TO 48N127W. WITHIN 120 NM N OF FRONT FROM 50N TO 54N
WINDS 35 TO 50 KT. SEAS 10 TO 18 FT. ELSEWHERE WITHIN 120 NM N
AND E OF FRONT E OF 142W WINDS 30 TO 45 KT. SEAS 8 TO 18 FT.
ALSO FROM 37N TO 59N BETWEEN 160W AND 125W WINDS 25 TO 40 KT.
SEAS 9 TO 24 FT.

...GALE WARNING...
.LOW 49N165W 1002 MB MOVING NE 25 KT. WITHIN 600 NM S AND SE
QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST LOW 53N151W 980 MB. WITHIN 360 NM OF LOW
EXCEPT WITHIN 1020 NM S AND SE QUADRANTS WINDS 25 TO 40 KT. SEAS
12 TO 19 FT.
.48 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DESCRIBED WITH
LOW 54N144W ABOVE.

...GALE WARNING...
.LOW 58N139W 980 MB MOVING NW 10 KT. WITHIN 480 NM SW QUADRANT
AND FROM 38N TO 47N BETWEEN 145W AND 126W WINDS 25 TO 35 KT.
SEAS 9 TO 19 FT.
.24 HOUR FORECAST LOW 58N147W 989 MB. WITHIN 480 NM SE QUADRANT
WINDS LESS THAN 25 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

...GALE WARNING...
.OVER FORECAST WATERS N OF 63N W OF 166W WINDS TO 25 KT. SEAS TO
9 FT.
.24 HOUR FORECAST LOW 63N164W 987 MB. WITHIN 300 NM W AND SW
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW 59N163W 988 MB. WITHIN 420 NM W SEMICIRCLE
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.

...GALE WARNING...
.FROM 31N TO 34N BETWEEN 118W AND 121W AREA OF NW WINDS LESS
THAN 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 30N TO 36N BETWEEN 118W AND 123W AREA OF
NW WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.30 HOUR FORECAST FROM 31N TO 35N BETWEEN 118W AND 123W AREA OF
NW WINDS 25 TO 35 KT. SEAS 10 TO 18 FT.
.48 HOUR FORECAST FROM 30N TO 36N BETWEEN 118W AND 124W AREA OF
NW WINDS 20 TO 30 KT. SEAS 9 TO 16 FT.

.SYNOPSIS AND FORECAST.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 41N TO 47N
BETWEEN 157W AND 172W.
.24 HOUR FORECAST CONDITIONS IMPROVED.

.HIGH 36N157W 1031 MB MOVING SE 10 KT.
.24 HOUR FORECAST HIGH 33N148W 1025 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST NEW HIGH 33N140W 1025 MB.
.48 HOUR FORECAST HIGH 34N130W 1027 MB.

.FORECASTER MUSONDA. 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 FRI OCT 20.
24 HOUR FORECAST VALID 0000 UTC SAT OCT 21.
48 HOUR FORECAST VALID 0000 UTC SUN OCT 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W TO 14W96W
...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30
KT. SEAS TO 8 FT.
.24 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W
TO 15N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20
TO 25 KT. SEAS TO 8 FT.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.S OF 03N W OF 135W WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED S
AND SE SWELL. S OF 00N AND W OF 95W WINDS 20 KT OR LESS. SEAS 8
FT IN MIXED SE AND S SWELL.
.24 HOUR FORECAST S OF 00N E OF 100W WINDS 20 KT OR LESS. SEAS 8
FT IN MIXED SE AND S SWELL.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.COLD FRONT NORTHWEST OF AREA. NW OF LINE FROM 30N137W TO
29N140W WINDS 20 KT OR LESS. SEAS RAPIDLY BUILDING TO 8 TO 10 FT
IN NW SWELL.
.06 HOUR FORECAST WEAKENING COLD FRONT FROM 30N134W TO 28N140W.
NW OF COLD FRONT WINDS 20 KT OR LESS. SEAS RAPIDLY BUILDING TO
12 TO 15 FT IN NW SWELL. ELSEWHERE NW OF A LINE FROM 30N131W TO
25N140W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW SWELL.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N120W TO 26N130W.
N OF 27N E OF 118W NE WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. N OF A
LINE FROM 24N140W TO 30N120W WINDS 20 KT OR LESS. SEAS 12 TO 15
FT IN NW SWELL. ELSEWHERE N OF LINE FROM 28N115W TO 14N140W
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. N OF 22N BETWEEN 115W AND
127W SEAS 12 TO 14 FT IN NW SWELL. REMAINDER OF THE AREA NW OF
LINE FROM 23N110W TO 20N110W TO 08N140W WINDS 20 KT OR LESS.
SEAS 8 TO 12 FT IN NW SWELL.

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

CONVECTION VALID AT 0430 UTC FRI OCT 20...

.TROPICAL WAVE N OF 04N NEAR 90W...SCATTERED MODERATE
ISOLATED STRONG FROM 06N TO 08N BETWEEN 89W AND 92W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N82W TO 09N121W. ITCZ CONTINUES FROM
09N121W TO BEYOND 10N140W. SCATTERED MODERATE WITHIN 60 NM OF
TROUGH FROM 93W TO 98W. SCATTERED MODERATE ISOLATED STRONG
WITHIN 60 NM OF ITCZ W OF 138W.

$$
.FORECASTER LANDSEA. NATIONAL HURRICANE CENTER.



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