000
FZPN03 KNHC 211531
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC THU OCT 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 THU OCT 21.
24 HOUR FORECAST VALID 1200 UTC FRI OCT 22.
48 HOUR FORECAST VALID 1200 UTC SAT OCT 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.DISSIPATING STATIONARY FRONT FROM 32N135W TO 28N140W. NEW COLD 
FRONT NEAR 31N140W. NW OF A LINE FROM 29N122W TO 21N140W WINDS 
20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL. 
.24 HOUR FORECAST COLD FRONT FROM 30N131W TO 26N140W. NW OF A 
LINE FROM 30N128W TO 25N140W WINDS 20 KT OR LESS. SEAS 8 TO 12 
FT IN NW SWELL...EXCEPT 12 TO 15 FT NW OF A LINE FROM 30N132W TO 
27N140W. FROM 14N TO 23N W OF 128W WINDS 20 KT OR LESS. SEAS 8 
FT IN NW SWELL.
.48 HOUR FORECAST WEAKENING COLD FRONT FROM 30N118W TO 25N140W.
NW OF A LINE FROM 29N116W TO 19N130W TO 15N140W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN NW SWELL. ELSEWHERE FROM 10N TO 16N W 
OF 122W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
 
.LOW PRES NEAR 12.5N95.5W 1011 MB. FROM 07N TO 10N BETWEEN 95W 
AND 98W WINDS 20 KT OR LESS. SEAS 8 FT IN S SWELL. FROM 06N TO 
09N BETWEEN 98W AND 101W WINDS 20 KT OR LESS. SEAS 8 FT IN S 
SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N100W 1009 MB. FROM 08N TO 10N BETWEEN 98W AND 101W SW WINDS 
20 TO 25 KT. SEAS 8 TO 9 FT IN S SWELL. FROM 14N TO 15N BETWEEN 
95W AND 101W NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.  
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14N102W. WITHIN 90 NM OF CENTER...EXCEPT 60 NM SW QUADRANT WINDS 
20 TO 30 KT. SEAS 9 TO 12 FT. ELSEWHERE FROM 08N TO 17N BETWEEN 
97W AND 103W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.

.42 HOUR FORECAST S OF 02S BETWEEN 112W AND 118W WINDS 20 KT OR 
LESS. SEAS 8 FT IN SW SWELL.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 1500 UTC THU OCT 21...

.LOW PRES NEAR 12.5N95.5W...SCATTERED MODERATE TO ISOLATED 
STRONG CONVECTION FROM 09N TO 16N BETWEEN 92W AND 100W.

.TROPICAL WAVE ALONG 137W FROM 05N TO 16N...SCATTERED MODERATE 
CONVECTION FROM 08N TO 10N BETWEEN 133W AND 136W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM NORTHERN COSTA RICA NEAR 10N84W 
TO LOW PRES LOCATED NEAR 12.5N95.5W TO 12N115W TO 1010 MB LOW 
PRES NEAR 10N126W TO 11N137W TO 11N140W. A CLUSTER OF MODERATE 
TO ISOLATED STRONG CONVECTION IS FROM 09N TO 12N BETWEEN 124W 
AND 127W. SIMILAR CONVECTION IS NOTED FROM 08N TO 13N BETWEEN 
113W AND 120W...FROM 08N TO 11N BETWEEN 103W AND 111W...AND FROM 
06N TO 10N BETWEEN 84W AND 89W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.