000
FZPN03 KNHC 201534
HSFEP2

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT NEAR 30N140W. NW OF A LINE FROM 30N132W TO 27N140W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL. 
.24 HOUR FORECAST DISSIPATING FRONT FROM 30N137W TO 28N140W. N W 
OF A LINE FROM 29N122W TO 25N130W TO 21N140W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN NW SWELL...HIGHEST N OF 28N W OF 130W.
.48 HOUR FORECAST REINFORCING COLD FRONT FROM 30N131W 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 14 FT NW OF A 
LINE FROM 30N132W TO 28N140W.

.FROM 05N TO 07N BETWEEN 102W AND 104W WINDS 20 KT OR LESS. SEAS 
8 FT IN S SWELL.
.24 HOUR FORECAST FROM 06N TO 08N BETWEEN 98W AND 101W...AND 
FROM 07N TO 10N BETWEEN 95W AND 97W WINDS 20 KT OR LESS. SEAS 8 
FT IN S SWELL.
.42 HOUR FORECAST FROM 08N TO 11N BETWEEN 98W AND 100W WINDS 20 
KT OR LESS. SEAS 8 FT IN S SWELL.

.WITHIN 15 NM OF A LINE FROM 16N95W TO 15N95.5W TO 13.5N97W... 
INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT. 
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 15N95.5W 
TO 14N97W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT. 
.48 HOUR FORECAST LITTLE CHANGE.

.48 HOUR FORECAST FROM 16N TO 22N BETWEEN 128W AND 136W WINDS 20 
KT OR LESS. SEAS 8 FT IN NW SWELL.

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

CONVECTION VALID AT 1500 UTC WED OCT 20...

TROPICAL WAVE ALONG 94W...SCATTERED MODERATE ISOLATED STRONG 
CONVECTION FROM 10N TO 16N BETWEEN 90W AND 100W.

TROPICAL WAVE ALONG 131W...SCATTERED MODERATE ISOLATED STRONG 
CONVECTION FROM 08N TO 11N BETWEEN 123W AND 131W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH AXIS EXTENDS FROM NORTHERN COSTA RICA NEAR 
10N84W TO 11N94W TO 09N103W TO 12N112W TO 09N125W TO 12N134W TO 
12N140W. ASIDE FROM THE CONVECTION ASSOCIATED WITH THE TROPICAL 
WAVES MENTIONED ABOVE, SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION CAN BE FOUND N OF 06 BETWEEN 78W AND 84W...FROM 07N 
TO 10N BETWEEN 100W AND 108W...FROM 09N TO 11N BETWEEN 112W AND 
114W...AND FROM 09N TO 12N W OF 134W.  

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.