High Seas Forecast
Issued by NWS

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000
FZPN02 KWBC 172325
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC SUN DEC 17 2017

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC DEC 17.
24 HOUR FORECAST VALID 1800 UTC DEC 18.
48 HOUR FORECAST VALID 1800 UTC DEC 19.

.WARNINGS.

...STORM WARNING...
.LOW 53N170E 975 MB MOVING N 15 KT AND RAPIDLY INTENSIFYING.
WITHIN 300 NM E OF A FRONT TO EXTEND FROM LOW TO 41N168E AREA OF
S WINDS 40 TO 50 KT. SEAS 18 TO 32 FT. ELSEWHERE WITHIN 540 NM
NE...840 NM SE...AND 1380 NM S QUADRANTS WINDS 25 TO 40 KT. SEAS
12 TO 24 FT.
.24 HOUR FORECAST LOW NW OF AREA 59N171E 943 MB. OVER FORECAST
WATERS WITHIN 480 NM SE AND 600 NM SW QUADRANTS...AND WITHIN 180
NM EITHER SIDE OF A LINE FROM 58N169W TO 49N169W TO 44N173W
WINDS 40 TO 50 KT. SEAS 18 TO 30 FT. ALSO WITHIN 780 NM
NE...1320 NM SE...AND 1140 NM S QUADRANTS WINDS 25 TO 40 KT.
SEAS 12 TO 24 FT. ELSEWHERE S OF 40N W OF 178E WINDS TO 25 KT.
SEAS 9 TO 18 FT.
.48 HOUR FORECAST LOW JUST NW OF FORECAST AREA 62N177W 963 MB.
WITHIN 180 NM NE...480 NM SE...AND 540 NM SW QUADRANTS WINDS 35
TO 45 KT. SEAS 20 TO 36 FT. ALSO WITHIN 300 NM NE...720 NM
SE...AND 780 NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS 12 TO 24
FT. ELSEWHERE WITHIN 1200 NM S QUADRANT WINDS TO 25 KT. SEAS 9
TO 18 FT.

...GALE WARNING...
.LOW 56N157W 998 MB MOVING E 20 KT WITH SECOND LOW 58N150W 994
MB MOVING SE 15 KT. WITHIN 360 NM NW AND 240 NM SW QUADRANTS OF
FIRST LOW WINDS 25 TO 40 KT. SEAS 12 TO 20 FT. ALSO WITHIN 540
NM NW AND 600 NM SW AND SE QUADRANTS OF FIRST LOW...AND WITHIN
600 NM SE QUADRANT OF SECOND LOW WINDS 20 TO 30 KT. SEAS 10 TO
20 FT. ELSEWHERE WITHIN 780 NM SW AND 720 NM SE QUADRANTS OF
FIRST LOW WINDS TO 25 KT. SEAS 9 TO 16 FT.
.24 HOUR FORECAST FIRST LOW DISSIPATED WITH SECOND LOW 56N139W
1008 MB. FROM 47N TO 58N BETWEEN 140W AND 153W AREA OF NW WINDS
20 TO 30 KT. SEAS 12 TO 17 FT. ELSEWHERE FROM 45N TO 59N BETWEEN
129W AND 170W WINDS TO 25 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOW
48N125W BELOW.

...GALE WARNING...
.OVER FORECAST WATERS WITHIN AN AREA BOUNDED BY 30N180W TO
35N180W TO 41N161W TO 41N150W TO 30N161W TO 30N180W WINDS 30 TO
45 KT...HIGHEST WITHIN 180 NM SE OF A LINE FROM 36N160W TO
32N174W. SEAS 10 TO 20 FT.
.24 HOUR FORECAST WITHIN AN AREA BOUNDED BY 30N179W TO 44N153W
TO 44N138W TO 30N157W TO 30N179W WINDS 25 TO 40 KT...HIGHEST
WITHIN 180 NM SE OF A LINE FROM 42N146W TO 36N159W. SEAS 10 TO
20 FT.
.48 HOUR FORECAST LOW 31N156W 1005 MB. WITHIN 480 NM NW OF A
LINE FROM 30N157W TO 38N137W AREA OF NE WINDS 30 TO 45 KT. SEAS
12 TO 22 FT.

...GALE WARNING...
.LOW JUST NW OF FORECAST AREA 53N163E 973 MB MOVING NE 15 KT.
EXCEPT AS DESCRIBED WITH LOW 53N170E ABOVE...OVER FORECAST
WATERS WITHIN 480 NM S QUADRANT WINDS 25 TO 40 KT. SEAS 11 TO 20
FT.
.24 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED WITH LOW
59N170E ABOVE.

...GALE WARNING...
.42 HOUR FORECAST NEW LOW 46N128W 1002 MB. WITHIN 420 NM SW
QUADRANT WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW 48N125W 998 MB. OVER FORECAST WATERS
WITHIN 360 NM S QUADRANT WINDS 35 TO 45 KT. SEAS 11 TO 19 FT.
ELSEWHERE FROM 40N TO 53N BETWEEN 124W AND 141W WINDS 25 TO 40
KT. SEAS 9 TO 18 FT.

...GALE WARNING...
.42 HOUR FORECAST LOW 49N160E 1000 MB. OVER FORECAST WATERS W OF
A LINE FROM 48N168E TO 41N166E TO 36N160E WINDS 25 TO 40 KT.
SEAS 9 TO 15 FT.
.48 HOUR FORECAST LOW 51N166E 995 MB WITH SECOND LOW 43N161E
1007 MB. W OF A LINE FROM 32N160E TO 50N176E WINDS 30 TO 45 KT.
SEAS 11 TO 21 FT.

...GALE WARNING...
.42 HOUR FORECAST FROM 50N TO 57N BETWEEN 152W AND 161W WINDS 25
TO 35 KT. SEAS 10 TO 20 FT. ELSEWHERE WITHIN 180 NM EITHER SIDE
OF A LINE FROM 50N158W TO 42N166W WINDS 20 TO 30 KT. SEAS 9 TO
18 FT.
.48 HOUR FORECAST WITHIN AN AREA BOUNDED BY 45N163W TO 57N157W
TO 59N149W TO 57N146W TO 45N163W WINDS 20 TO 30 KT. SEAS 9 TO 18
FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER FORECAST WATERS N OF 61N
W OF 167W.
.24 HOUR LIGHT TO MODERATE FREEZING SPRAY N OF 64N W OF 168W.
.48 HOUR FORECAST CONDITIONS IMPROVING.

.SYNOPSIS AND FORECAST.

.OVER FORECAST WATERS FROM 30N TO 42N BETWEEN 123W AND 130W AREA
OF N WINDS 20 TO 30 KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST S OF 33N BETWEEN 123W AND 140W WINDS LESS THAN
25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.WITHIN 240 NM SE OF A FRONT TO EXTEND FROM 50N128W TO 44N142W
WINDS TO 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST CONDITIONS DESCRIBED WITH LOW 56N139W IN
WARNINGS SECTION ABOVE.

.OVER FORECAST WATERS S OF A LINE FROM 30N159W TO 37N150W WINDS
TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST...EXCEPT AS DESCRIBED IN WARNINGS SECTION
ABOVE...WITHIN 120 NM EITHER SIDE OF A LINE FROM 30N149W TO
38N144W WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST CONDITIONS DESCRIBED WITH LOW 31N156W IN
WARNINGS SECTION ABOVE.

.48 HOUR FORECAST...EXCEPT AS DESCRIBED IN WARNINGS SECTION
ABOVE...WITHIN 360 NM SE OF A LINE FROM 43N174W TO 35N170E WINDS
20 TO 30 KT. SEAS 8 TO 15 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM OVER FORECAST
WATERS WITHIN 120 NM EITHER SIDE OF A LINE FROM 50N172E TO
41N166E.
.24 HOUR FORECAST DENSE FOG OVER FORECAST WATERS N OF 57N
BETWEEN 167W AND 174W.
.48 HOUR FORECAST CONDITIONS IMPROVING.

.HIGH 38N135W 1029 MB MOVING E 05 KT.
.24 HOUR FORECAST HIGH 38N131W 1027 MB.
.48 HOUR FORECAST HIGH 34N125W 1024 MB.

.HIGH 41N172W 1037 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 45N160W 1037 MB.
.48 HOUR FORECAST HIGH 46N152W 1037 MB.

.48 HOUR FORECAST HIGH 42N177E 1034 MB.

.FORECASTER FIGURSKEY. 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 17.
24 HOUR FORECAST VALID 1800 UTC MON DEC 18.
48 HOUR FORECAST VALID 1800 UTC TUE DEC 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.N OF LINE FROM 21N140W TO 24N115W TO 27N114W WINDS 20 KT OR
LESS. SEAS 8 TO 14 FT NW TO N SWELL.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 20N140W TO 19N115W TO
25N113W TO 30N123W TO 30N140W TO 20N140W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN NW TO N SWELL.
.48 HOUR FORECAST N OF 18N W OF 132W WINDS 20 KT OR LESS. SEAS 8
TO 9 FT IN MIXED NW TO N SWELL.

.S OF LINE FROM 19N140W TO 09N188W WINDS 20 KT OR LESS. SEAS 8
TO 9 FT IN NW SWELL AND NE WIND WAVES.
.24 HOUR FORECAST FROM 10N TO 15N W OF 135W WINDS 20 KT OR LESS.
SEAS TO 8 FT IN NW SWELL AND NE WIND WAVES.
.48 HOUR FORECAST FROM 12N TO 18N BETWEEN 125W AND 132W WINDS 20
KT OR LESS. SEAS TO 8 FT IN NW SWELL AND NE WIND WAVES.

.GULF OF CALIFORNIA LOW PRES NEAR 30.5N112W 1008 MB WITH
STATIONARY FRONT TO BEYOND 28N113W. N OF 30N W OF 114W NW WINDS
20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST LOW NE OF AREA AND FRONT DISSIPATED. WINDS 20
KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 10N TO 12N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE
TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 10N TO 12N E OF 88W...INCLUDING GULF OF
PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. FROM 08N TO
10N BETWEEN 88W AND 92W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN
MIXED NW AND NE SWELL.
.48 HOUR FORECAST FROM 09N TO 11N BETWEEN 90W AND 92W WINDS 20
TO 25 KT. SEAS TO 8 FT IN MIXED NW AND NE SWELL.

.12 HOUR FORECAST N OF 14.5N BETWEEN 94W AND 95W...INCLUDING
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST N OF 14N BETWEEN 94.5W AND 95.5W...INCLUDING
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 2100 UTC SUN DEC 17...

.SCATTERED MODERATE ISOLATED STRONG FROM 17N TO 20N BETWEEN 107W
AND 113W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 06N95W TO 10N127W TO 10N140W. NO SIGNIFICANT
CONVECTION.


.FORECASTER AL. NATIONAL HURRICANE CENTER.

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

SYNOPSIS VALID 1800 UTC DEC 17 2017.
24 HOUR FORECAST VALID 1800 UTC DEC 18 2017.
48 HOUR FORECAST VALID 1800 UTC DEC 19 2017.

.WARNINGS.

...GALE WARNING...
.FRONT FROM 30N168W TO 22N180W TO 23N170E TO 30N162E MOVING E TO
25 KT E OF 180E...NEARLY STATIONARY ELSEWHERE. NE WINDS 25 TO 35
KT BETWEEN FRONT AND 178W. NE TO E WINDS 20 TO 30 KT ELSEWHERE N
OF FRONT.
.24 HOUR FORECAST FRONT FROM 30N157W TO 24N165W TO 22N178E. NE
WINDS 30 TO 35 KT N OF 27N BETWEEN FRONT AND 175W. NE TO E WINDS
20 TO 30 KT ELSEWHERE N OF FRONT.
.48 HOUR FORECAST FRONT FROM 30N150W TO 24N160W TO 20N180W TO
20N175E. NE TO E WINDS 20 TO 30 KT N OF FRONT.

.SYNOPSIS AND FORECAST.

.LOW 24N159W 1010 MB MOVING N SLOWLY. TROUGH FROM LOW TO 30N158W
AND FROM LOW TO 18N163W. E TO SE WINDS 20 TO 25 KT N OF 21N
BETWEEN 149W AND 153W. WIDELY SCATTERED TSTMS N OF A LINE FROM
20N150W AND 24N155W.
.24 HOUR FORECAST LOW AND TROUGH MERGED WITH FRONT DESCRIBED
ABOVE. S TO SE WINDS 20 TO 25 KT N OF 23N BETWEEN 148W AN 151W.
.48 HOUR FORECAST S WINDS DIMINISHED TO 20 KT OR LESS.

.FRONT APPROACHING 30N160E MOVING E 20 KT. S WINDS 20 TO 25 KT N
OF 28N W OF 167E.
.24 HOUR FORECAST FRONT NEAR 30N160E. WINDS DIMINISHED TO 20 KT
OR LESS.
.48 HOUR FORECAST FRONT FROM 30N164E TO 28N160E.

.TROUGH FROM 18N155W TO 10N162W TO 01N174W MOVING W NEAR 10 KT.
SCATTERED MODERATE TSTMS WITHIN 120 NM OF TROUGH BETWEEN 162W
AND 170W.
.24 HOUR FORECAST TROUGH FROM 17N150W TO 08N170W TO 02N175W.
.48 HOUR FORECAST TROUGH FROM 20N160W TO 10N171W TO 03N175W.

.DISSIPATING TROUGH 11N143W TO 08N144W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.

.NE TO E WINDS 20 TO 25 KT FROM 06N TO 20N W OF 180W.
.24 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 06N TO 20N W OF
175E.
.48 HOUR FORECAST NE TO E WINDS 20 TO 25 KT FROM 08N TO 23N W OF
170E.

.RIDGE FROM 30N172E TO 27N168E AND FROM 24N160E TO
25N163E...NEARLY STATIONARY AND ERODING FROM W.

.SEAS 12 TO 20 FT N OF A LINE FROM 30N161W TO 21N176E. SEAS 8 TO
12 FT ELSEWHERE N OF 21N E OF 169E. SEAS 8 TO 9 FT FROM 05N TO
20N W OF 172W AND FROM 10N TO 15N E OF 148W.
.24 HOUR FORECAST SEAS 12 TO 18 FT N OF A LINE FROM 30N151W TO
20N170E TO 20N175E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM
30N140W TO 05N160E.
.48 HOUR FORECAST SEAS 12 TO 15 FT N OF A LINE FROM 30N155W TO
20N177W TO 21N175E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM
22N140W TO 06N160E.

.OTHERWISE WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS OVER REST
OF AREA.

.SCATTERED MODERATE TSTMS S OF 06N BETWEEN 178E AND 165E.

$$

.FORECASTER MORRISON. HONOLULU HI.



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