000
FZPN03 KNHC 181517
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC SAT DEC 18 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 18.
24 HOUR FORECAST VALID 1200 UTC SUN DEC 19.
48 HOUR FORECAST VALID 1200 UTC MON DEC 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FROM 13N TO 20N W OF 125W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 
11 FT IN MIXED NW AND NE SWELL. ELSEWHERE FROM 09N TO 23N W OF 
120W...AND FROM 23N TO 27N BETWEEN 116W AND 125W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN NW TO N SWELL.
.24 HOUR FORECAST FROM 07N TO 20N W OF 128W...AND FROM 10N TO 
18N BETWEEN 122W AND 128W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 
IN MIXED NW AND NE SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 10N TO 11N E OF 88W...INCLUDING THE GULF OF PAPAGAYO... 
NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.12 HOUR FORECAST FROM 10N TO 11N E OF 88W...INCLUDING THE GULF 
OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST FROM 10N TO 11N E OF 88W...INCLUDING THE GULF 
OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF CALIFORNIA N OF 27N NW TO N WINDS 20 TO 25 KT. SEAS 
TO 8 FT N OF 29N.
.12 HOUR FORECAST GULF OF CALIFORNIA N OF 26N NW TO N WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.36 HOUR FORECAST COLD FRONT FROM 30N135W TO 28N140W. NW OF 
FRONT WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST COLD FRONT FROM 30N133W TO 25N140W. NW OF 
FRONT NW WINDS 20 TO 25 KT. SEAS 8 TO 12 FT IN NW SWELL. N OF 
28N E OF FRONT TO A LINE FROM 30N128W TO 28N132W SW WINDS 20 TO 
25 KT. SEAS TO 8 FT.

.36 HOUR FORECAST N OF 14.5N BETWEEN 95.5W AND 96.5W...INCLUDING 
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT.
.48 HOUR FORECAST N OF 13.5N BETWEEN 95.5W AND 96.5W...INCLUDING 
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS BUILDING TO 
8 FT.

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

CONVECTION VALID AT 1500 UTC SAT DEC 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM SOUTHERN COSTA RICA NEAR 09N83W 
TO 08N95W TO 1011 LOW PRESSURE LOCATED NEAR 10N107W. THE ITCZ 
CONTINUES FROM 10N107W TO 08N120W, THEN FROM 08N128W TO 10N138W. 
SCATTERED MODERATE CONVECTION IS NOTED FROM 10N TO 14N BETWEEN 
100W AND 111W...AND FROM 07N TO 12N BETWEEN 115W AND 128W. 
NUMEROUS MODERATE TO ISOLATED STRONG CONVECTION CAN BE FOUND 
FROM 08N TO 15N W OF 134W. THIS CONVECTIVE ACTIVITY IS 
ASSOCIATED WITH A SURFACE TROUGH LOCATED JUST W OF AREA. 

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.