000
FZPN03 KNHC 230306
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC SAT DEC 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC SAT DEC 23.
24 HOUR FORECAST VALID 0000 UTC SUN DEC 24.
48 HOUR FORECAST VALID 0000 UTC MON DEC 25.

.WARNINGS.

...GALE WARNING...

.LOW PRES W OF AREA NEAR 24.5N145W 1008 MB. FROM 23N TO 28N W OF 
138W SE WINDS 20 TO 25 KT. SEAS 9 FT. ELSEWHERE N OF 16N W OF 
135W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SE AND NW 
SWELL. 
.12 HOUR FORECAST LOW PRES NEAR 28.5N141W 1007 MB. WITHIN 150 NM 
E QUADRANT OF LOW SE TO S WINDS 30 TO 35 KT. SEAS 11 TO 15 FT. 
ELSEWHERE W OF LINE FROM 30N133W TO 21N138W SE TO S WINDS 20 TO 
30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST COLD FRONT FROM LOW PRES JUST N OF AREA NEAR 
30.5N137.5W 1008 MB TO 30N138W TO 25N140W. OVER FORECAST WATERS 
WITHIN 210 NM SE QUADRANT OF LOW S WINDS 20 TO 25 KT. SEAS 9 TO 
13 FT. ELSEWHERE W OF LINE FROM 30N133W TO 27N133W TO 24N138W 
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SE AND NW SWELL. 
.48 HOUR FORECAST LOW NE OF AREA. WEAKENING COLD FRONT FROM 
30N136W TO 28N138W...THEN WEAKENING STATIONARY FRONT TO 25N140W. 
W OF LINE FROM 30N130W TO 20N140W WINDS 20 KT OR LESS. SEAS 8 TO 
12 FT IN NW SWELL.

...GALE WARNING...

.24 HOUR FORECAST WITHIN 45 NM OF LINE FROM 16N95W TO 
14.5N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 
20 TO 30 KT. SEAS 8 TO 9 FT.
.30 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 
15N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 
35 KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 45 NM OF LINE FROM 
16N95W TO 15N95W TO 14N95.5W N TO NE WINDS 20 TO 30 KT. SEAS 8 
TO 10 FT.
.36 HOUR FORECAST WITHIN 45 NM OF LINE FROM 16N95W TO 14N95W TO 
12.5N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 
TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST WITHIN 45 NM OF LINE FROM 16N95W TO 15N95W TO 
14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 
TO 30 KT. SEAS 8 TO 11 FT. FROM 10.5N TO 14N BETWEEN 95W AND 98W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.

.SYNOPSIS AND FORECAST.

.GULF OF CALIFORNIA FROM 24.5N TO 28.5N...FROM 22N TO 24.5N 
BETWEEN 108W AND 111.5W AND FROM 18N TO 20N BETWEEN 105W AND 
107W NW TO N WINDS 20 TO 25 KT. SEAS TO 8 FT GULF OF CALIFORNIA.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.12 HOUR FORECAST FROM 10N TO 11.5N E OF 87.5W...INCLUDING THE 
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.36 HOUR FORECAST FROM 10N TO 11.5N E OF 87.5W...INCLUDING THE 
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0230 UTC SAT DEC 23...

.SURFACE TROUGH FROM LOW PRES NEAR 10N114.5W TO 
15N113W...SCATTERED MODERATE ISOLATED STRONG FROM 10N TO 19N 
BETWEEN 109W AND 118W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 04N77W TO 06N87W TO 06N98W TO 08N109W. ITCZ 
CONTINUES FROM 09N119W TO 09N128W TO BEYOND 10N140W. SCATTERED 
MODERATE FROM 06N TO 10N BETWEEN 134W AND 140W. 

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.