000
FZPN03 KNHC 212109
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC THU OCT 21.
24 HOUR FORECAST VALID 1800 UTC FRI OCT 22.
48 HOUR FORECAST VALID 1800 UTC SAT OCT 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N138W TO 29N140W. NW OF A LINE FROM 30N121W 
TO 28N121W TO 21N130W TO 19N140W WINDS 20 KT OR LESS. SEAS 8 TO 
10 FT IN NW SWELL. 
.24 HOUR FORECAST COLD FRONT FROM 30N128W TO 27N140W. 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 30N119W TO 26N140W.
NW OF A LINE FROM 30N116W TO 25N120W 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 13N97W 1011 MB MOVING W AT 10 KT. FROM 13N TO 15N 
BETWEEN 95W AND 98W NE TO E 20 TO 25 KT. SEAS 8 FT. FROM 09N TO 
11N BETWEEN 92W AND 98W SW WINDS 20 TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N100W 1009 MB. WITHIN 120 NM N SEMICIRCLE OF CENTER WINDS 20 
TO 25 KT. SEAS 8 TO 9 FT. FROM 08N TO 11N BETWEEN 98W AND 101W 
SW WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.  
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14N101W 1007 MB. 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.

.36 HOUR FORECAST S OF 02S BETWEEN 112W AND 119W WINDS 20 KT OR 
LESS. SEAS 8 FT IN SW SWELL.
.48 HOUR FORECAST S OF 02S BETWEEN 112W AND 117W WINDS 20 KT OR 
LESS. SEAS 8 FT IN SW SWELL.

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

CONVECTION VALID AT 2100 UTC THU OCT 21...

.LOW PRES NEAR 13N97W...NUMEROUS MODERATE TO STRONG WITHIN ABOUT 
75 NM NW QUADRANT OF CENTER. SCATTERED MODERATE TO ISOLATED 
STRONG ELSEWHERE FROM 09N TO 16N BETWEEN 92W AND 102W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM NORTHERN COSTA RICA NEAR 10N84W 
TO 1011 MB LOW PRES LOCATED NEAR 13N97W TO 10N105W TO 1011 MB 
LOW PRES SITUATED NEAR 12N116W TO 08N134W TO 12N140W. ASIDE FROM 
THE CONVECTION ASSOCIATED WITH THE LOW PRES LOCATED NEAR 
13N97W...SCATTERED MODERATE CONVECTION CAN BE FOUND FROM 09N TO 
15N BETWEEN 90W AND 110W...FROM 10N TO 15N BETWEEN 113W AND 
120W...AND FROM 07N TO 11N BETWEEN 120W AND 131W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.