High Seas Forecast
Issued by NWS

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000
FZPN03 KNHC 171545
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC WED JAN 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1200 UTC WED JAN 17.
24 HOUR FORECAST VALID 1200 UTC THU JAN 18.
48 HOUR FORECAST VALID 1200 UTC FRI JAN 19.

.WARNINGS.

...GALE WARNING...
.WITHIN 75 NM EITHER SIDE OF A LINE FROM 16N95W TO 12.5N96.5W...
INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 45 KT.
SEAS 12 TO 19 FT. ELSEWHERE WITHIN 120 NM EITHER SIDE OF A LINE
FROM 16N95W TO 12.5N96.5W TO 11.5N98.5W N TO NE WINDS 20 TO 30
KT. SEAS 10 TO 14 FT. REMAINDER OF AREA BOUNDED BY 16N95W TO
13N92W TO 10N95W TO 10N100W TO 13N100W TO 16N95W WINDS 20 KT OR
LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.24 HOUR FORECAST WITHIN 60 NM EITHER SIDE OF A LINE FROM 16N95W
TO 12.5N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS
30 TO 45 KT. SEAS 11 TO 19 FT. ELSEWHERE WITHIN 120 NM EITHER
SIDE OF A LINE FROM 16N95W TO 13N96W TO 11N100W N TO NE WINDS 20
TO 30 KT. SEAS 10 TO 16 FT. REMAINDER OF AREA BOUNDED BY 16N95W
TO 14N93W TO 11N94W TO 10N95W TO 10N103W TO 12N102W TO 16N95W
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.48 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF A LINE FROM 16N95W
TO 14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS
30 TO 35 KT. SEAS 9 TO 13 FT. ELSEWHERE WITHIN 75 NM EITHER SIDE
OF SAME LINE N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.
REMAINDER OF AREA FROM 10N TO 14.5N BETWEEN 93W AND 100W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.

.SYNOPSIS AND FORECAST.

.COLD FRONT W OF AREA. W OF A LINE FROM 30N140W TO 30N115W TO
09N96W TO 03.4S110W WINDS 20 KT OR LESS. SEAS 8 TO 13 FT MIXED S
AND NW SWELL...HIGHEST FROM 12N TO 20N W OF 120W.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N133W TO 26N140W. W
OF A LINE FROM 30N129W TO 22N140W WINDS 20 KT OR LESS. SEAS 11 TO
17 FT IN MIXED SE AND NW SWELL...HIGHEST NEAR 30N133W. ELSEWHERE
W OF A LINE FROM 30N115W TO 18N105W TO 10N87W TO 03.4S104W WINDS
20 KT OR LESS. SEAS 8 TO 13 FT IN MIXED SWELL...HIGHEST CENTRAL
PART.
.36 HOUR FORECAST COLD FRONT REINFORCED FROM 30N128W TO 23N140W.
W OF FRONT N TO NE WINDS 20 TO 25 KT. SEAS 12 TO 15 FT IN MIXED
SE AND NW SWELL. ELSEWHERE W OF A LINE FROM 30N116W TO 17N104W TO
09N87W TO 03.4S100W WINDS 20 KT OR LESS. SEAS 8 TO 14 FT IN MIXED
SWELL...HIGHEST CENTRAL PART.
.48 HOUR FORECAST DISSIPATING COLD FRONT FROM 30N123W TO 26N130W.
TO 20N138W. W OF A LINE FROM 30N125W TO 20N135W TO 15N133W TO
13N140W N TO NE WINDS 20 TO 25 KT. SEAS 11 TO 15 FT IN MIXED SE
AND NW SWELL. ELSEWHERE W OF A LINE FROM 30N116W TO 20N113W TO
09N86W TO 03.4S95W WINDS 20 KT OR LESS. SEAS 8 TO 14 FT IN MIXED
SWELL...HIGHEST NEAR 30N120W AND NEAR 10N105W.

.WITHIN 45 NM EITHER SIDE OF A LINE FROM 11N86W TO 08N90W...
INCLUDING THE GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 8
FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 1500 UTC WED JAN 17...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH AXIS EXTENDS FROM 07N77W TO 08N84W TO 04N96W. ITCZ AXIS
EXTENDS FROM 04N96W TO 06N107W TO 05N115W TO 10N140W. SCATTERED
MODERATE ISOLATED STRONG WITHIN AREA BOUNDED BY 09N79W TO 04N78W
TO 04N84W TO 07N84W TO 09N79W AND ALSO WITHIN AREA BOUNDED BY
14N135W TO 14N124W TO 05N115W TO 04N124W TO 10N140W TO 14N135W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.


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