000
FZPN03 KNHC 200304
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC THU DEC 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC THU DEC 20.
24 HOUR FORECAST VALID 0000 UTC FRI DEC 21.
48 HOUR FORECAST VALID 0000 UTC SAT DEC 22.

.WARNINGS.

...GALE WARNING...
.24 HOUR FORECAST WITHIN 15 NM EITHER SIDE OF LINE FROM 16N95W 
TO 15N95W...INCLUDING GULF OF TEHUANTEPEC...N WINDS 30 TO 35 KT. 
SEAS LESS THAN 8 FT. ELSEWHERE N OF 14N BETWEEN 94.5W AND 95.5W 
N WINDS 20 TO 30 KT. SEAS BUILDING TO 8 FT.
.48 HOUR FORECAST WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W 
TO 15N95W TO 14N95.5W...INCLUDING GULF OF TEHUANTEPEC...N TO NE 
WINDS 30 TO 40 KT. SEAS 10 TO 16 FT. ELSEWHERE WITHIN 60 NM 
EITHER SIDE OF LINE FROM 16N94.5W TO 12N97W TO 11N100W N TO NE 
WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. REMAINDER OF AREA BOUNDED BY 
16N95W TO 11N92W TO 08N98W TO 11N102W TO 14N101W TO 16N95W WINDS 
20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED NE AND NW SWELL.

.SYNOPSIS AND FORECAST.

.GULF OF CALIFORNIA WITHIN 60 NM OF THE COAST OF BAJA CALIFORNIA 
FROM 24N TO 28N NW TON WINDS 20 TO 25 KT. TO 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.COLD FRONT APPROACH 30N140W. NW OF LINE FROM 30N126W TO 18N140W 
WINDS 20 KT OR LESS. SEAS 12 TO 14 FT IN NW SWELL. ELSEWHERE FOR 
OPEN WATERS W OF 99W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW 
SWELL...HIGHEST NEAR 15N115W.
.24 HOUR FORECAST COLD FRONT FROM 30N133W TO 28N137W...THEN 
WEAKENING COLD FRONT TO 25N140W. OPEN WATERS W OF 92W WINDS 20 
KT OR LESS. SEAS 8 TO 13 FT IN NW SWELL...HIGHEST NEAR 30N117W.
.30 HOUR FORECAST WEAKENING STATIONARY FRONT FROM 30N131W TO 
27N136W. FROM 10N TO 14N W OF 135W NE WINDS 20 TO 25 KT.
SEAS 11 TO 12 FT. ELSEWHERE W OF LINE FROM 30N116W TO 16N106W TO 
04N91W TO 03.4S93W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN NW 
SWELL. 
.48 HOUR FORECAST FRONT DISSIPATED. FROM 10N TO 14N W OF 136W NE 
WINDS 20 TO 25 KT. SEAS 11 TO 13 FT. ELSEWHERE W OF LINE FROM 
30N116W TO 19N107W TO 02N93W TO 03.4S91W WINDS 20 KT OR LESS. 
SEAS 8 TO 11 FT IN NW SWELL.

.42 HOUR FORECAST FROM 11N86W TO 10N87.5W...INCLUDING THE GULF 
OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11.5N86W TO 09N88W...INCLUDING THE GULF 
OF PAPAGAYO...NE WINDS 20 TO 30 KT. SEAS TO 9 FT.

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

CONVECTION VALID AT 0245 UTC WED DEC 19...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 06N74W TO 05N79W TO 06N89W TO 06N97W. ITCZ 
CONTINUES FROM 06N97W TO 05N118W TO BEYOND 08N140W. SCATTERED 
MODERATE ISOLATED STRONG FROM 05N TO 10N W OF 130W. SCATTERED 
MODERATE FROM 04N TO 07N BETWEEN 87W AND 93W.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.