000
FZPN03 KNHC 201517
HSFEP2

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 11.5N116W 1011 MB. FROM 06N TO 10N BETWEEN 110W 
AND 113W WINDS 20 KT OR LESS. SEAS 8 FT IN S TO SW SWELL.
.24 HOUR FORECAST LOW PRES NEAR 13N118W 1008 MB. FROM 10N TO 12N 
BETWEEN 114W AND 116W SW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. 
ELSEWHERE FROM 09N TO 15N BETWEEN 111W AND 116W WINDS 2O KT OR 
LESS. SEAS 8 TO 9 FT PRIMARILY IN S SWELL. 
.48 HOUR FORECAST LOW PRES NEAR 15N 121W 1008 MB. WITHIN 120 NM 
NE QUADRANT WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. 

.N OF 29N BETWEEN 132W AND 135W WINDS 20 KT OR LESS. SEAS 8 FT 
IN NW SWELL.
.24 HOUR FORECAST N OF 28N BETWEEN 122W AND 128W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN NW SWELL.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.42 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. 
.48 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 15N95W 
TO 13.595.5W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 
25 KT. SEAS BUILDING TO 8 FT.

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

CONVECTION VALID AT 1500 UTC MON SEP 20...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 09N84W TO 11N100W A 1011 MB LOW 
PRESSURE NEAR 11.5N116W TO 09N130W. THE ITCZ CONTINUES FROM 
09N130W TO 06N140W. ASIDE FROM THE CONVECTION ASSOCIATED WITH 
THE TROPICAL WAVES, SCATTERED MODERATE CONVECTION IS FROM 05N TO 
09N E OF 85W TO THE COAST OF COLOMBIA. A CLUSTER OF MODERATE 
CONVECTION IS OVER THE GULF OF TEHUANTEPEC. SCATTERED MODERATE 
TO ISOLATED STRONG CONVECTION IS NOTED FROM 08N TO 12N BETWEEN 
112W AND 120W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.