North Pacific High Seas Forecast

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FZPN01 KWBC 162202
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC SUN DEC 16 2018 

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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. 

SEE ANNOUNCEMENT OF PLANNED INMARSAT I-3 TO I-4 MIGRATION 
IN 2018 AT OCEAN.WEATHER.GOV/GMDSS_NOTICE.PHP (LOWERCASE). 

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

SECURITE 

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

SYNOPSIS VALID 1800 UTC DEC 16. 
24 HOUR FORECAST VALID 1800 UTC DEC 17. 
48 HOUR FORECAST VALID 1800 UTC DEC 18. 

.WARNINGS. 

...STORM WARNING... 
.LOW 47N171W 967 MB MOVING E 40 KT. WITHIN 720 NM S SEMICIRCLE 
WINDS 40 TO 55 KT. SEAS 20 TO 43 FT...HIGHEST IN SW QUADRANT. 
ELSEWHERE WITHIN 480 NM N SEMICIRCLE...AND 1200 NM SE AND 1080 
NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 20 FT. ALSO WITHIN 
1380 NM S SEMICIRCLE...AND WITHIN 720 NM NW AND 600 NM NE 
QUADRANTS WINDS TO 25 KT. SEAS 10 TO 18 FT.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 50N148W 967 MB 
AND SECOND CENTER 49N139W 970 MB. BETWEEN 360 NM AND 960 NM SW 
QUADRANT OF FIRST CENTER AND WITHIN 720 NM SE QUADRANT OF SECOND 
CENTER WINDS 40 TO 55 KT. SEAS 30 TO 44 FT. ELSEWHERE WITHIN 
1440 NM S SEMICIRCLE AND 1080 NM NW QUADRANT OF FIRST CENTER 
WINDS 25 TO 40 KT. SEAS 15 TO 31 FT. ALSO WITHIN 1200 NM 
NW...480 NM NE...1560 NM SE AND 1680 NM SW QUADRANTS OF FIRST 
CENTER WINDS TO 25 KT. SEAS 10 TO 20 FT. 
.48 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 56N137W 971 MB 
AND SECOND CENTER 50N140W 973 MB. WITHIN 360 NM W SEMICIRCLE OF 
SECOND CENTER WINDS 40 TO 55 KT. SEAS 18 TO 37 FT. ELSEWHERE 
WITHIN 960 NM NW...480 NM NE...900 NM SE AND 780 NM SW QUADRANTS 
OF SECOND CENTER WINDS 25 TO 40 KT. SEAS 12 TO 25 FT...EXCEPT 17 
TO 34 FT IN SW QUADRANT. ALSO WITHIN 1260 NM NW...1200 NM SE AND 
1680 NM SW QUADRANTS OF SECOND CENTER WINDS TO 25 KT. SEAS 8 TO 
18 FT. 

...STORM WARNING... 
.24 HOUR FORECAST LOW W OF AREA NEAR 42N155E 984 MB. FROM 30N TO 
51N W OF 167E WINDS 30 TO 45 KT. SEAS 10 TO 20 FT. ELSEWHERE 
FROM 30N TO 50N W OF 170E WINDS 20 TO 30 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST LOW W OF AREA NEAR 54N163E 956 MB. OVER 
FORECAST WATERS WITHIN 1020 NM SE AND 480 NM SW QUADRANTS WINDS 
40 TO 55 KT. SEAS 14 TO 29 FT. ELSEWHERE WITHIN 600 NM NE...1440 
NM SE AND 660 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 11 TO 22 
FT. ALSO FROM 30N TO 59N W OF 175W WINDS TO 25 KT. SEAS 11 TO 22 
FT.

...GALE WARNING... 
.LOW 56N147W 967 MB MOVING NW 15 KT. WITHIN 300 NM N 
SEMICIRCLE...AND BETWEEN 300 NM AND 1560 NM SE QUADRANT...AND 
BETWEEN 300 NM AND 1200 NM SW QUADRANT WINDS 30 TO 45 KT. SEAS 
13 TO 27 FT...EXCEPT 17 TO 34 FT IN SW QUADRANT. ELSEWHERE 
WITHIN 360 NM N SEMICIRCLE...AND 1680 NM SE AND 1380 NM SW 
QUADRANTS WINDS 20 TO 30 KT. SEAS 11 TO 23 FT...HIGHEST IN SW 
QUADRANT. 
.24 HOUR FORECAST LOW INLAND 60N150W 972 MB. WITHIN 540 NM SE 
AND 420 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS 11 TO 23 FT. 
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. 

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY NE OF A LINE FROM 58N160W TO 
61N176W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY NE OF A LINE 
FROM 58N160W TO 61N177W. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY NE OF A LINE 
FROM 56N155W TO 62N175W. 

.SYNOPSIS AND FORECAST. 

.EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 30N TO 60N 
BETWEEN 116W AND 160E WINDS TO 25 KT. SEAS 8 TO 14 FT. 
.24 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 
30N TO 60N BETWEEN 116W AND 168E WINDS TO 25 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 
30N TO 55N BETWEEN 116W AND 160E WINDS TO 25 KT. SEAS 8 TO 15 FT.

.24 HOUR FORECAST HIGH 31N130W 1026 MB.
.48 HOUR FORECAST HIGH 32N128W 1029 MB.

.24 HOUR FORECAST HIGH 35N173E 1032 MB. 
.48 HOUR FORECAST HIGH 33N174W 1032 MB. 

.24 HOUR FORECAST HIGH 53N179W 1016 MB.
.48 HOUR FORECAST HIGH 46N171W 1024 MB.

.24 HOUR FORECAST HIGH 35N173E 1032 MB.
.48 HOUR FORECAST HIGH 33N173W 1032 MB. 

.FORECASTER HOLLEY. 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 DEC 16.
24 HOUR FORECAST VALID 1800 UTC MON DEC 17.
48 HOUR FORECAST VALID 1800 UTC TUE DEC 18.

.WARNINGS.

...GALE WARNING...
.WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W TO 14N95.5W... 
INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 40 KT. SEAS 
8 TO 16 FT. ELSEWHERE WITHIN 90 NM EITHER SIDE OF LINE FROM 
16N95W TO 12N97W N TO NE WINDS 20 TO 30 KT. SEAS 10 TO 15 FT. 
REMAINDER OF AREA FROM 06N TO 14N BETWEEN 93W AND 110W WINDS 20 
KT OR LESS. SEAS 8 TO 11 FT IN MIXED NE AND NW SWELL.
.12 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W 
TO 14N95W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 
40 KT. SEAS 13 TO 16 FT. ELSEWHERE WITHIN 60 NM EITHER SIDE OF 
LINE FROM 16N95W TO 13N96W N TO NE WINDS 20 TO 30 KT. SEAS 11 TO 
13 FT. REMAINDER OF AREA FROM 04N TO 14N BETWEEN 93W AND 110W 
WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 12.5N96W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 
TO 30 KT. SEAS 10 TO 14 FT. ELSEWHERE FROM 02N TO 14N BETWEEN 
92W AND 112W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.36 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 13N96W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 
30 KT. SEAS 9 TO 11 FT. ELSEWHERE FROM 01N TO 14N BETWEEN 94W 
AND 112W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. 
.48 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W N WINDS 20 TO 
25 KT. SEAS LESS THAN 8 FT. FORM 11.5N TO 13.5N BETWEEN 94.5W 
AND 96.5W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED N AND SW 
SWELL. FROM 01N TO 11N BETWEEN 93W AND 100W...AND ALSO S OF 13N 
BETWEEN 100W AND 107W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
MIXED SWELL. 

.SYNOPSIS AND FORECAST.

.WITHIN 45 NM EITHER SIDE OF LINE FROM 11.5N86W TO 08.5N90W... 
INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 10 FT.
.12 HOUR FORECAST WITHIN 60 NM EITHER SIDE OF LINE FROM 11.5N86W 
TO 09N89.5W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 30 KT.
SEAS TO 9 FT.
.24 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 1.51N86W 
TO 09N89W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT.
SEAS TO 9 FT.  
.48 HOUR FORECAST LITTLE CHANGE.

.COLD FRONT FROM 30N133W TO 27N140W. NW OF FRONT WINDS 20 KT OR 
LESS. SEAS 15 TO 25 FT IN NW SWELL...HIGHEST NW. WITHIN 120 NM 
SE OF FRONT WINDS 20 KT OR LESS. SEAS 9 TO 15 FT IN NW SWELL. 
ELSEWHERE N OF 05N W OF 110W WINDS 20 KT OR LESS. SEAS 8 TO 10 
FT IN NW SWELL.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N125W TO 27N135W 
THEN WEAKENING STATIONARY FRONT TO 26N140W. NW OF LINE FROM 
30N116W TO 15N127W TO 10N140W WINDS 20 KT OR LESS. SEAS 10 TO 
20 FT IN NW SWELL...HIGHEST N. ELSEWHERE N OF 03N W OF 112W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. NW OF LINE FROM 23N110W TO 
08N118W TO 00N130W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW TO 
N SWELL...EXCEPT 14 TO 18 FT IN NW SWELL N OF 24N E OF 125W. 
ELSWHERE N OF 01N W OF 107W 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 0230 UTC SUN DEC 16...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM 08N75W TO 06.5N88.5W. ITCZ FROM 
06.5N89W TO 05.5N102W TO 05.5N130W TO BEYOND 06N140W. SCATTERED 
MODERATE TO STRONG WITHIN 210 NM N AND 120 NM S OF ITCZ BETWEEN 
116W AND 130W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.