000
FZPN03 KNHC 201524
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC MON DEC 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MON DEC 20.
24 HOUR FORECAST VALID 1200 UTC TUE DEC 21.
48 HOUR FORECAST VALID 1200 UTC WED DEC 22.

.WARNINGS.

...GALE WARNING... 
.WITHIN 45 NM OF A LINE FROM 16N95W TO 15N95W TO 13N95.5W... 
INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. 
SEAS 8 TO 10 FT.
.12 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 
14.5N95W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35 
KT. SEAS 8 TO 10 FT. ELSEWHERE WITHIN 45 NM OF A LINE FROM 
16N95W TO 14.5N95W TO 13N96W N TO NE WINDS 20 TO 30 KT. SEAS 8 
TO 9 FT.
.24 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 15N95W 
TO 14.5N96W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 
25 TO 35 KT. SEAS 8 TO 10 FT. ELSEWHERE WITHIN 45 NM OF A LINE 
FROM 16N95W TO 14.5N96W TO 12N97W N TO NE WINDS 20 TO 25 KT. 
SEAS 8 TO 9 FT.
.36 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 16N95W TO 14.5N95W 
TO 12N97W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N133W TO 25N140W. NW OF FRONT NW WINDS 20 TO 
25 KT. SEAS 8 TO 12 FT IN NW SWELL...HIGHEST NEAR 30N140W. N OF 
28N E OF FRONT TO A LINE FROM 30N129W TO 28N132W SW WINDS 20 TO 
25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST COLD FRONT FROM 30N129W TO 25N134W THEN 
DISSIPATING FROM TO 21N140W. NW OF FRONT WINDS 20 KT OR LESS. 
SEAS 8 TO 11 FT IN NW SWELL. N OF 29N E OF FRONT TO 126W S TO SW 
WINDS 20 TO 25 KT. SEAS 8 FT.
.48 HOUR FORECAST COLD FRONT FROM 30N127W TO 25N130W. W OF A 
LINE FROM 30N125W TO 24N125W TO 19N131W TO 15N140W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT IN NW SWELL.

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

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

CONVECTION VALID AT 1500 UTC MON DEC 20...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS FROM CENTRAL COSTA RICA NEAR 09N84W 
TO 06N100W TO 11N112W. THE ITCZ BEGINS NEAR 11N112W TO 09N125W 
TO 11N130W. A SURFACE TROUGH EXTENDS FROM 16N133W TO 10N139W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS SEEN FROM 13N-
15N BETWEEN 106W-113W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.