000
FZPN03 KNHC 302145
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC SAT DEC 30.
24 HOUR FORECAST VALID 1800 UTC SUN DEC 31.
48 HOUR FORECAST VALID 1800 UTC MON JAN  1.

.WARNINGS.

...GALE WARNING...
.COLD FRONT FROM 30N135W TO 26N137W TO 22N140W. N OF 28N BETWEEN 
134W AND 136W S WINDS 20 TO 25 KT. SEAS TO 9 FT. ELSEWHERE N OF 
28N W OF 135W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SE 
AND NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 30N133W TO 20N137W. NEW COLD 
FRONT APPROACHING FROM NW. NW OF LINE FROM 30N137W TO 28N140W NW 
WINDS 20 TO 25 KT. SEAS 8 TO 11 FT.
.36 HOUR FORECAST FIRST COLD FRONT DISSIPATED. SECOND FRONT FROM 
30N133W TO 22N134W TO 18N140W. N OF 29N W OF 139W NW WINDS 30 TO 
35 KT. SEAS 18 TO 22 FT. ELSEWHERE N OF 27N W OF 135W W TO NW 
WINDS 20 TO 30 KT. SEAS 12 TO 22 FT. REMAINDER OF AREA W OF LINE 
FROM 30N134W TO 27N135W TO 25N140W WINDS 20 KT OR LESS. SEAS 8 
TO 12 FT IN NW SWELL.

.SYNOPSIS AND FORECAST.

.WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W TO 14.5N95.5W... 
INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 
TO 9 FT. ELSEWHERE WITHIN 60 NM EITHER SIDE OF LINE FROM 
14.5N95.5W TO 12.5N96W TO 12N98W WINDS 20 KT OR LESS. SEAS TO 9 
FT IN MIXED SW AND NW SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.33 HOUR FORECAST FROM 15N TO 16N BETWEEN 94.5W AND 95.5W... 
INCLUDING GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS 
THAN 8 FT.
.42 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W 
TO 15N95W TO 14N95.5W...INCLUDING GULF OF TEHUANTEPEC...N TO NE 
WINDS 20 TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 14.5N95W TO 13.5N96W...INCLUDING GULF OF TEHUANTEPEC...N TO 
NE WINDS 20 TO 30 KT. SEAS TO 10 FT.

.39 HOUR FORECAST SURFACE TROUGH FROM 25N126W TO 20N128W TO 
15N131W TO 10N131W. FROM 22N TO 25N BETWEEN 125W AND 126W SE 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST SURFACE TROUGH 27N126W TO 20N130W TO 16N130W 
TO 10N130W. FROM 24N TO 27N BETWEEN 123W AND 127W SE WINDS 20 TO 
25 KT. SEAS TO 9 FT. 

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

CONVECTION VALID AT 2100 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 MT. NATIONAL HURRICANE CENTER.