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East and Central North Pacific High Seas Forecast

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FZPN02 KWBC 181125
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC THU APR 18 2019

CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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). 

SECURITE 

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

SYNOPSIS VALID 0600 UTC APR 18. 
24 HOUR FORECAST VALID 0600 UTC APR 19. 
48 HOUR FORECAST VALID 0600 UTC APR 20. 

.WARNINGS. 

...GALE WARNING... 
.LOW 55N139W 992 MB MOVING NW 20 KT. OVER FORECAST WATERS WITHIN 
300 NM SE SEMICIRCLE AND 240 NM NE QUADRANT WINDS 30 TO 45 KT. 
SEAS 13 TO 26 FT. ELSEWHERE WITHIN 420 NM W QUADRANT WINDS 20 TO 
30 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 61N148W 992 MB. WITHIN 120 NM S SEMICIRCLE 
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE N OF 52N BETWEEN 
139W AND 159W WINDS 20 TO 30 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST LOW DISSIPATED INLAND OVER ALASKA AND 
CONDITIONS DIMINISHED. 

...GALE WARNING... 
.LOW 43N178E 997 MB MOVING NW 10 KT AND TURNING SE AFTER 06 
HOURS. WITHIN 420 NM NE OF A LINE FROM 43N174E TO 30N179W WINDS 
25 TO 35 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST COMPLEX LOW MEAN CENTER NEAR 43N174W 1001 MB. 
WITHIN 360 NM S...420 NM SE QUADRANTS...AND 480 NM NW OF A LINE 
FROM 42N176E TO 46N172W WINDS 20 TO 30 KT. SEAS 8 TO 14 FT. 
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW 
49N157W DESCRIBED BELOW. 

...GALE WARNING... 
.24 HOUR FORECAST LOW 34N162E 996 MB. OVER FORECAST WATERS FROM 
30N TO 37N W OF 175E WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. 
.48 HOUR FORECAST LOW 36N178E 997 MB. WITHIN 240 NM NW QUADRANT 
WINDS 25 TO 35 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 600 NM NW 
SEMICIRCLE AND 660 NM SE QUADRANT WINDS 20 TO 30 KT. SEAS 8 TO 
14 FT. 

...GALE WARNING... 
.24 HOUR FORECAST NEW LOW 43N168W 998 MB. WITHIN 240 NM S 
SEMICIRCLE AND 360 NM E OF A FRONT FROM 43N164W TO 36N163W TO 
30N166W WINDS 25 TO 40 KT. SEAS TO 12 FT. ELSWHERE WITHIN 90 NM 
NE QUADRANT WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW 49N157W 993 MB. WITHIN 420 NM S...360 NM 
SW...300 NM NW...BETWEEN 90 NM AND 300 NM NE QUADRANTS...AND 
WITHIN 360 NM E OF A FRONT FROM 52N152W TO 35N151W WINDS 25 TO 
40 KT. SEAS 8 TO 14 FT.

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY N OF 62N W OF 167W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 61N 
BETWEEN 166W AND 173W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 62N W OF 
ALASKA. 

.SYNOPSIS AND FORECAST. 

.LOW 43N148W 1014 MB MOVING NE 40 KT. WITHIN 300 NM S QUADRANT 
WINDS 20 TO 30 KT. SEAS TO 12 FT. 
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. 

.OVER ICE FREE FORECAST WATERS IN THE BERING SEA N OF 60N W OF 
ALASKA WINDS TO 25 KT. SEAS LESS THAN 8 FT. 
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS DIMINISHED. 

.48 HOUR FORECAST OVER FORECAST WATERS E OF A LINE FROM 36N127W 
TO 42N129W TO 47N129W TO 50N130W AREA OF N TO NW WINDS 20 TO 30 
KT. SEAS TO 11 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 48N 
BETWEEN 126W AND 132W.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 46N BETWEEN 125W AND 
129W AND WITHIN 90 NM OF 32N170E. 
.48 HOUR FORECAST DENSE FOG FROM 32N TO 37N BETWEEN 172E AND 
164W.

.HIGH 37N131W 1029 MB MOVING SW 25 KT. 
.24 HOUR FORECAST HIGH DISSIPATED. 

.HIGH 31N143W 1025 MB MOVING SW 10 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 33N163W 1025 MB MOVING NE 40 KT. 
.24 HOUR FORECAST HIGH 40N147W 1029 MB. 
.48 HOUR FORECAST HIGH 46N136W 1029 MB. 

.HIGH 46N167W 1018 MB MOVING E 25 KT. 
.24 HOUR FORECAST HIGH DISSIPATED. 

.48 HOUR FORECAST HIGH 51N166E 1031 MB. 

.FORECASTER JOSEPH. 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 0600 UTC THU APR 18.
24 HOUR FORECAST VALID 0600 UTC FRI APR 19.
48 HOUR FORECAST VALID 0600 UTC SAT APR 20.

.WARNINGS.

...GULF OF TEHUANTEPEC GALE WARNING...
.30 HOUR FORECAST GULF OF TEHUANTEPEC N OF 14.5N BETWEEN 94W AND 
95.5W N WINDS 25 TO 35 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 14.5N95.5W TO 13N96W N TO NE WINDS 30 TO 40 KT. SEAS 8 TO 18 
FT. ELSEWHERE WITHIN 90 NM EITHER SIDE OF LINE FROM 16N95W TO 
14N95W TO 11N98W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 16 FT.

.SYNOPSIS AND FORECAST.

.FROM 10.5N TO 11.5N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE 
TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

.N OF 29N BETWEEN 119W AND 125W WINDS 20 KT OR LESS. SEAS 8 FT
IN NW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 04N TO 14N W OF 123W WINDS 20 KT OR LESS. SEAS 8 FT IN 
MIXED SWELL.
.24 HOUR FORECAST FROM 08N TO 12N W OF 128W WINDS 20 KT OR LESS.
SEAS 8 FT IN MIXED NW AND SE SWELL.
.48 HOUR FORECAST FROM 07N TO 15N W OF 135W NE WINDS 20 TO 25 
KT. SEAS 9 FT. ELSEWHERE FROM 04N TO 16N W OF 130W WINDS 20 KT 
OR LESS. SEAS 8 FT IN MIXED NW AND SE SWELL.

.03 HOUR FORECAST GULF OF CALIFORNIA FROM 23N TO 26N NW WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT.
.09 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST FROM 27N TO 28N NW WINDS 20 TO 25 KT. SEAS 
LESS THAN 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0900 UTC THU APR 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 09N83W TO 08N88W TO 06N94W TO 06N99W. TROUGH 
FROM 09N102W TO 03N105W. ITCZ FROM 05N106W TO 04N109W TO 06N117W 
TO 06N121W. SECOND TROUGH FROM 11N122W TO 03N124W. ITCZ FROM 
04N126W BEYOND 02N140W. SCATTERED TO NUMEROUS STRONG FROM 05N TO 
08N BETWEEN 121W AND 125W. 

.FORECASTER MT. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0600 UTC APR 18 2019.
24 HOUR FORECAST VALID 0600 UTC APR 19 2019.
48 HOUR FORECAST VALID 0600 UTC APR 20 2019.

.WARNINGS. 

...GALE WARNING... 
.12 HOUR FORECAST FRONT APPROACHING AREA FROM THE W. SW WINDS 20 
TO 30 KT SEAS 8 TO 9 FT NW OF A LINE FROM 30N164E TO 28N160E. 
.24 HOUR FORECAST FRONT FROM 30N165E TO 26N160E. WINDS 30 TO 35 
KT SEAS 12 TO 15 FT N OF 29N W OF 166E. WINDS 20 TO 30 KT SEAS 8 
TO 12 FT ELSEWHERE NW OF A LINE FROM 30N173E TO 25N160E. 
.48 HOUR FORECAST FRONT FROM 30N176E TO 25N170E TO 22N160E. 
WINDS 20 TO 30 KT SEAS 8 TO 12 FT N OF 27N BETWEEN 179E AND 
166E. 

.SYNOPSIS AND FORECAST. 

.COLD FRONT FROM 30N180E TO 27N173E THENCE STATIONARY FRONT TO 
26N167E THENCE WARM FRONT TO 29N160E. COLD FRONT MOVING E 15 KT 
AND WARM FRONT MOVING N 15 KT. WINDS 20 TO 25 KT SEAS 8 TO 9 FT 
N OF 29N W OF 161E. 
.24 HOUR FORECAST FRONT FROM 30N165W TO 28N173E. ASSOCIATED 
WINDS DECREASED TO 20 KT OR LESS AND SEAS DECREASED TO 8 FT OR 
LESS. 
.48 HOUR FORECAST FRONT MOVED N OF AREA. 

.DISSIPATING STATIONARY FRONT FROM 30N151W TO 27N158W. 
.24 HOUR FORECAST FRONT DISSIPATED. 

.NE TO E WINDS 20 TO 25 KT SEAS 8 TO 9 FT FROM 06N TO 12N 
BETWEEN 152W AND 173W. 
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT SEAS 8 TO 9 FT FROM 
05N TO 16N E OF 175W. 
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT SEAS 8 TO 9 FT FROM 
04N TO 20N E OF 175W. 

.RIDGE FROM 30N143W TO 28N153W MOVING NE 15 KT AND ERODING FROM 
THE W. 

.RIDGE FROM 30N162W TO 25N177W TO 24N172E TO 22N160E MOVING E 15 
KT AND ERODING FROM THE W. 

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

.ISOLATED MODERATE TSTMS S OF 07N W OF 166E. 

.ITCZ FROM 02N140W TO 01N154W. ISOLATED MODERATE TSTMS S OF 02N 
BETWEEN 147W AND 150W. 

$$ 

.FORECASTER BIRCHARD. HONOLULU HI.