000
FZPN03 KNHC 301520
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC SAT DEC 30 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC SAT DEC 30.
24 HOUR FORECAST VALID 1200 UTC SUN DEC 31.
48 HOUR FORECAST VALID 1200 UTC MON JAN  1.

.WARNINGS.

...GALE WARNING...
.COLD FRONT FROM 30N138W TO 27N138W TO 23N140W. FROM 28N TO 30N
BETWEEN 135W AND 138W S WINDS 20 TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST DISSIPATING COLD FRONT FROM 30N133W TO 21N140W.
NEW COLD FRONT APPROACHING FROM NW. FROM 29N TO 30N BETWEEN 138W
AND 140W WINDS 20 KT OR LESS. SEAS TO 8 FT IN NW SWELL.
.42 HOUR FORECAST FIRST COLD FRONT DISSIPATED. SECOND FRONT FROM
30N130W TO 20N132W TO 17N140W. FROM 28N TO 30N WITHIN 138W AND
140W NW WINDS 30 TO 35 KT. SEAS 12 TO 20 FT. ELSEWHERE W OF 
FRONT W TO NW WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
.48 HOUR FORECAST COLD FRONT FROM 30N129W TO 20N130W THEN
DISSIPATING COLD FRONT TO 15N140W. FROM 28N TO 30N BETWEEN 138W 
AND 140W NW WINDS 30 TO 35 KT. SEAS 21 FT. ELSEWHERE FROM 25N TO
30N BETWEEN 135W AND 140W NW WINDS 20 TO 30 KT. SEAS 12 TO 20 FT.
REMAINDER OF AREA W OF FRONT WINDS 20 KT OR LESS. SEAS 8 TO 12 
FT IN NW SWELL.

.SYNOPSIS AND FORECAST.

.WITHIN 60 NM EITHER SIDE OF LINE FROM 16N95W TO
12N97W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30
KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST N OF 14N BETWEEN 94W AND 96W...INCLUDING GULF
OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.36 HOUR FORCAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W TO
14N96W...INCLUDING GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT.
SEAS 8 FT. 

.SURFACE TROUGH FROM 17N122W TO 11N125W. FROM 15N TO 20N BETWEEN
120W AND 125W E WINDS 20 TO 25 KT. SEAS TO 8 FT. 
.06 HOUR FORECAST LITTLE CHANGE IN TROUGH POSITION. WINDS 20 KT
OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST SURFACE TROUGH FROM 23N123W TO 20N126W. WINDS
20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST SURFACE TROUGH FROM 26N126W TO 23N126W. WITHIN
AREA BOUNDED BY 25N126W TO 25N123W TO 22N123W TO 22N125W TO 
25N126W SE WINDS 20 TO 25 KT. SEAS 8 FT.

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

CONVECTION VALID AT 1500 UTC SAT DEC 30...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM FROM 08N82W TO 06N100W...WHERE 
IT TRANSITIONS TO THE ITCZ AND CONTINUES W TO 09N140W. SCATTERED
MODERATE FROM 07N TO 10N BETWEEN 100W AND 110W...AND FROM 10N TO
12N BETWEEN 110W AND 115W. 

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.