High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 181556
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC WED OCT 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC OCT 18.
24 HOUR FORECAST VALID 1200 UTC OCT 19.
48 HOUR FORECAST VALID 1200 UTC OCT 20.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH FIRST LOW 55N146W 968 MB MOVING E 20 KT AND
SECOND LOW 57N141W 970 MB MOVING SE 15 KT. FRONT FROM SECOND LOW
TO 56N136W TO 50N131W. WITHIN 240 NM W AND 300 NM SW QUADRANTS
OF FIRST LOW...AND FROM 42N TO 49N BETWEEN 139W AND 157W...AND
120 NM N AND E OF FRONT WINDS 40 TO 55 KT. SEAS 19 TO 38
FT...HIGHEST S OF 49N. ELSEWHERE FROM 41N TO 60N BETWEEN 126W
AND 162W
WINDS 25 TO 40 KT. SEAS 12 TO 28 FT.
.24 HOUR FORECAST LOW 54N134W 974 MB. WITHIN 900 NM S AND SW AND
720 NM W QUADRANTS WINDS 25 TO 40 KT. SEAS 13 TO 28 FT...HIGHEST
SW QUADRANT.
.48 HOUR FORECAST LOW DISSIPATED. FROM 40N TO 49N BETWEEN 125W
AND 135W WINDS 20 TO 30 KT. SEAS 14 TO 20 FT.

...STORM WARNING...
.LOW W OF AREA 49N159E 992 MB MOVING NE 15 KT. OVER FORECAST
WATERS FROM 43N TO 51N W OF 167E WINDS 25 TO 40 KT. SEAS 8 TO 16
FT.
.06 HOUR FORECAST LOW 49N160E 987 MB. WITHIN 180 NM S AND 180 NM
N QUADRANTS WINDS 40 TO 55 KT. SEAS 18 TO 33 FT...EXCEPT N
QUADRANT SEAS 14 TO 19 FT.
.24 HOUR FORECAST LOW 50N169E 981 MB. WITHIN 360 NM S AND
SW...AND BETWEEN 120 NM AND 240 NM NW QUADRANTS WINDS 40 TO 55
KT. SEAS 17 TO 32 FT. ALSO FROM 43N TO 56N BETWEEN 172W AND 160E
AND FROM 47N TO 50N BETWEEN 165W AND 176W WINDS 25 TO 40 KT.
SEAS 10 TO 24 FT.
.48 HOUR FORECAST LOW 52N174W 980 MB. FROM 44N TO 49N BETWEEN
172W AND 175E WINDS 40 TO 50 KT. SEAS 17 TO 34 FT. ELSEWHERE
FROM 42N TO 56N BETWEEN 164W AND 170E WINDS 25 TO 40 KT. SEAS 10
TO 26 FT.

...GALE WARNING...
.LOW 41N166E 1011 MB MOVING NE 40 KT. FROM 42N TO 45N BETWEEN
168E AND 180W WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW 47N178W 1004 MB. WITHIN 480 NM S AND
SW...AND 180 NM NE QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW 47N147W 998 MB. FROM 38N TO 47N BETWEEN
141W AND 167W WINDS 25 TO 40 KT. SEAS 10 TO 18 FT.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST OVER FORECAST WATERS FROM 32N TO 35N BETWEEN
118W AND 122W AREA OF NW WINDS TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST FROM 31N TO 36N BETWEEN 116W AND 123W AREA OF
NW WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

.48 HOUR FORECAST NEW LOW 59N145W 986 MB. WITHIN 300 NM SW
QUADRANT WINDS TO 25 KT. SEAS TO 11 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 39N TO 43N
BETWEEN 179E AND 174E.
24 HOUR FORECAST DENSE FOG FROM 41N TO 48N BETWEEN 167W AND 180W.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.HIGH 36N132W 1023 MB MOVING SE 15 KT.
.24 HOUR FORECAST HIGH NEAR 31N129W 1019 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 42N169W 1034 MB MOVING SE 20 KT.
.24 HOUR FORECAST HIGH 37N158W 1033 MB.
.48 HOUR FORECAST HIGH 34N156W 1029 MB.

.FORECASTER ROWLAND. 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 1200 UTC WED OCT 18.
24 HOUR FORECAST VALID 1200 UTC THU OCT 19.
48 HOUR FORECAST VALID 1200 UTC FRI OCT 20.

.WARNINGS.

...GALE WARNING...
.WITHIN 30 NM EITHER SIDE OF A LINE FROM 16N95W TO 15N95W TO
14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30
TO 40 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 60 NM EITHER SIDE
OF LINE FROM 16N95W TO 15N95W TO 12N97W N TO NE WINDS 20 TO 30
KT. SEAS 8 TO 13 FT. REMAINDER OF AREA FROM 09N TO 13N BETWEEN
93W AND 100W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NE
AND SW SWELL.
.24 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W
TO 15N95W TO 14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO
NE WINDS 30 TO 35 KT. SEAS 9 TO 12 FT. ELSEWHERE WITHIN 60 NM
EITHER SIDE OF LINE FROM 16N95W TO 14N95.5W TO 13N95.5W N TO NE
WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. REMAINDER OF AREA FROM 11.5N
TO 13N BETWEEN 94W AND 98W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
IN MIXED NE AND SW SWELL.
.30 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W
TO 14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS
20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE WITHIN 45 NM EITHER SIDE
OF LINE FROM 16N95W TO 14N95.5W TO 11.5N97W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN MIXED NE AND SW SWELL.
.48 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W
TO 13.5N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE
WINDS 20 TO 30 KT. SEAS 8 TO 10 FT.

.SYNOPSIS AND FORECAST.

.06 HOUR FORECAST S OF 05N BETWEEN 132W AND 137W WINDS 20 KT OR
LESS. SEAS 8 FT IN SE SWELL.
.24 HOUR FORECAST S OF 04N W OF 135W WINDS 20 KT OR LESS. SEAS 8
FT IN SE SWELL. S OF 02S W OF 116W WINDS 20 KT OR LESS. SEAS 8
FT IN S SWELL.
.36 HOUR FORECAST S OF 03N W OF 134W WINDS 20 KT OR LESS. SEAS 8
FT IN SE SWELL. S OF 01S W OF 96W WINDS 20 KT OR LESS. SEAS 8 FT
IN S SWELL.
.48 HOUR FORECAST S OF 02S W OF 114W AND S OF 01S BETWEEN 85W
AND 102W WINDS 20 KT OR LESS. SEAS 8 FT IN S TO SW SWELL.

.36 HOUR FORECAST WEAKENING COLD FRONT FROM 30N130W TO 24N140W.
N OF 29N W OF 138W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW
SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. NW OF A LINE FROM 30N130W TO
26N140W WINDS 20 KT OR LESS. SEAS 12 TO 16 FT IN NW SWELL.
ELSEWHERE NW OF A LINE FROM 30N126W TO 22N140W 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 1430 UTC WED OCT 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N84W TO 08N100W TO 10N114W TO 10N118W.
ITCZ CONTINUES FROM 10N118W TO 07N133W TO BEYOND 08N140W.
SCATTERED MODERATE ISOLATED STRONG FROM 07N TO 11N BETWEEN 93W
AND 95W...FROM 07N TO 10N BETWEEN 105W AND 112W AND FROM 06N TO
12N BETWEEN 117W AND 128W.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.



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