000
FZPN03 KNHC 210921
HSFEP2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC FRI SEP 21 2012

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SYNOPSIS VALID 0600 UTC FRI SEP 21.
24 HOUR FORECAST VALID 0600 UTC SAT SEP 22.
48 HOUR FORECAST VALID 0600 UTC SUN SEP 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 13.5N104.5W 1006 MB MOVING W AT 9 KT. WITHIN 50 
NM OF CENTER WINDS 20 TO 25 KT. SEAS TO 8 FT. FROM 07N TO 10N 
BETWEEN 102W AND 108W SW WINDS 20 TO 25 KT. SEAS TO 8 FT. 
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14.5N107.5W 1005 MB. WITHIN 120 NM OF CENTER...EXCEPT SW 
QUADRANT...WINDS 20 TO 30 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 
08N TO 11N BETWEEN 102W AND 109W SW WINDS 20 TO 25 KT. SEAS TO 9 
FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
15N110W 1004 MB. WITHIN 150 NM OF CENTER WINDS 25 TO 30 KT. SEAS 
8 TO 11 FT. ELSEWHERE FROM 08N TO 13N BETWEEN 104W AND 112W SW 
WINDS 20 TO 25 KT. SEAS TO 9 FT. 

.TROUGH FROM 24N138W TO 18N137W. FROM 21N TO 25N W OF 134W NE 
TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST TROUGH 18N138W TO 13N138W. W OF TROUGH NE 
WINDS 20 KT OR LESS. SEAS TO 8 FT.
.36 HOUR FORECAST TROUGH DISSIPATED. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT. 

.N OF 26N BETWEEN 120W AND 125W NW TO N WINDS 20 TO 25 KT. SEAS 
8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. 

.N OF 14N BETWEEN 94W AND 96W...INCLUDING GULF OF TEHUANTEPEC... 
NE TO E WINDS 20 TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0900 FRI SEP 21...

.LOW PRES NEAR 13.5N104.5W. SCATTERED MODERATE ISOLATED STRONG 
FROM 10N TO 16N BETWEEN 100W AND 107W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 11N85W TO 10N93W TO 1006 MB LOW PRES 
13.5N104.5W TO 1010 MB LOW PRES NEAR 15N112W TO 11N124W THEN THE 
ITCZ CONTINUES TO 10N133W TO BEYOND 06N140W. CLUSTERS OF 
SCATTERED MODERATE TO STRONG FROM 04N TO 08N BETWEEN 78W AND 81W 
AND N OF 06N BETWEEN 81W AND 86W. SCATTERED MODERATE ISOLATED 
STRONG FROM 07N TO 10N BETWEEN 128W AND 138W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.