000
FZPN03 KNHC 211531
HSFEP2

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

...GALE WARNING...
.12 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING 
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT. 
.24 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 15N95W 
TO 13N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 
30 KT. SEAS TO 8 FT. 
.36 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 
14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35 
KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 60 NM OF A LINE FROM 
16N95W TO 14N95.5W TO 12.5N97W N WINDS 20 TO 30 KT. SEAS 8 TO 9 
FT.
.48 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 16N95W TO 
14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35 
KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 60 NM OF A LINE FROM 
16N95W TO 14N95.5W TO 11.5N98.5W N WINDS 20 TO 30 KT. SEAS 8 TO 
9 FT.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 14N118W 1011 MB. WITHIN 60 NM NW QUADRANT WINDS 
20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE FROM 08N TO 14N BETWEEN 
112W AND 117W WINDS 20 KT OR LESS. SEAS 8 FT IN S SWELL. 
.24 HOUR FORECAST LOW PRES NEAR 15N120W 1008 MB. WITHIN 60 NM NW 
QUADRANT WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. 
.48 HOUR FORECAST LOW PRES NEAR 18N123W 1008 MB. WITHIN 90 NM NW 
QUADRANT WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. 

.N OF 28N BETWEEN 121W AND 128W WINDS 20 KT OR LESS. SEAS 8 TO 9 
FT IN NW SWELL.
.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 TUE SEP 21...

.LOW PRES NEAR 14N118W...SCATTERED MODERATE TO ISOLATED STRONG 
FROM 09N TO 17N BETWEEN 111W AND 121W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 09N84W TO 10N96W TO 15N110W TO 
1011 MB LOW PRESSURE LOCATED NEAR 14N118W TO 09N125W TO ANOTHER 
1011 MB LOW PRESSURE SITUATED NEAR 08N134W TO 06N137W. THE ITCZ 
CONTINUES FROM 06N137W TO BEYOND 06N140W. ASIDE FROM THE 
CONVECTION ASSOCIATED WITH THE TROPICAL WAVES, SCATTERED 
MODERATE TO STRONG CONVECTION IS NOTED N OF 04N E OF 80W TO THE 
COAST OF COLOMBIA, FROM 08N TO 10N BETWEEN 84W AND 90W, AND FROM 
10N TO 12N BETWEEN 89W AND 92W. SCATTERED MODERATE CONVECTION IS 
FROM 08N TO 10N BETWEEN 97W AND 100W, AND FROM 07N TO 10N W OF 
130W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.