000
FZPN03 KNHC 312131
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC SUN DEC 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

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 31.
24 HOUR FORECAST VALID 1800 UTC MON JAN 01.
48 HOUR FORECAST VALID 1800 UTC TUE JAN 02.

.WARNINGS.

...GALE WARNING...
.06 HOUR FORECAST COLD FRONT FROM 30N137W TO 25N140W. W OF FRONT 
W TO NW WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.12 HOUR FORECAST COLD FRONT FROM 30N135W TO 24N140W. FROM 28N 
TO 30N BETWEEN 135W AND 140W NW TO N WINDS 30 TO 35 KT. SEAS 14 
TO 18 FT. ELSEWHERE W OF FRONT W TO NW WINDS 20 TO 30 KT. SEAS 9 
TO 14 FT.
.24 HOUR FORECAST COLD FRONT FROM 30N132W TO 21N140W. W OF FRONT 
NW WINDS 20 TO 30 KT. SEAS 12 TO 18 FT FROM 25N TO 30N BETWEEN 
135W AND 140W...AND 11 TO 16 FT ELSEWHERE W OF FRONT.
.48 HOUR FORECAST COLD FRONT FROM 30N129W TO 25N134W THEN 
DISSIPATING STATIONARY FRONT TO 20N140W. FROM 23N TO 30N BETWEEN 
134W AND 140W NW WINDS 20 TO 30 KT. SEAS 12 TO 15 FT. ELSEWHERE 
W OF FRONT WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW SWELL.

...GALE WARNING...
.12 HOUR FORECAST N OF 15N BETWEEN 94W AND 96W...INCLUDING GULF 
OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 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 8 TO 10 FT.
.30 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W 
TO 14N96W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 
35 KT. SEAS 10 TO 13 FT. ELSEWHERE WITHIN 60 NM EITHER SIDE OF 
LINE FROM 16N95W TO 12.5N96W...INCLUDING GULF OF TEHUANTEPEC...N 
TO NE WINDS 20 TO 30 KT. SEAS 8 TO 10 FT. 
.48 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 12.5N96W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 30 
TO 40 KT. SEAS 12 TO 17 FT. ELSEWHERE WITHIN 120 NM EITHER SIDE 
OF LINE FROM 16N95W TO 11N98W...INCLUDING GULF OF 
TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 

.SYNOPSIS AND FORECAST.

.12 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 11N86W 
TO 10N87W...INCLUDING GULF OF PAPAGAYO...NE TO E 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 WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.18 HOUR FORECAST SURFACE TROUGH FROM 26N125W TO 22N127W. FROM 
22N TO 25N BETWEEN 125W AND 127W SE WINDS 20 TO 25 KT. SEAS TO 8 
FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST TROUGH DISSIPATED. FROM 29N TO 30N BETWEEN 
125W AND 130W WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED SE AND 
NW SWELL. 

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

CONVECTION VALID AT 2100 UTC SUN DEC 31...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM LOW PRES NEAR 06N80W TO 06N100W... WHERE IT 
CONVERTS TO THE ITCZ AND CONTINUES ON TO 12N127W THEN TO BEYOND 
07N140W. SCATTERED MODERATE FROM 05N TO 07N BETWEEN 80W AND 
85W...FROM 12N TO 15N BETWEEN 120W AND 125W...FROM 18N TO 20N 
BETWEEN 125W AND 135W.

$$ 
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.