HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC FRI SEP 22 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC FRI SEP 22.
24 HOUR FORECAST VALID 0000 UTC SAT SEP 23.
48 HOUR FORECAST VALID 0000 UTC SUN SEP 24.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 17.5N104W 1008 MB. WITHIN 120 NM OF LOW WINDS 20 
KT OR LESS. SEAS TO 8 FT IN MIXED SWELL. SCATTERED SHOWERS AND 
THUNDERSTORMS WITHIN 240 NM N AND 75 NM S SEMICIRCLES.  
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
18N105W 1006 MB. WITHIN 90 NM NE AND 120 NM SW SEMICIRCLES WINDS 
20 TO 25 KT. SEAS TO 8 FT. 
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
18.5N105.5W 1005 MB. WITHIN 90 NM NE AND 120 NM SW SEMICIRCLES 
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. 

.FROM 10N TO 14N BETWEEN 99W AND 110W SW TO W WINDS 20 TO 30 KT. 
SEAS 8 TO 12 FT. ELSEWHERE WITHIN 180 NM SE OF LINE FROM 15N99W 
TO 09N120W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN SE SWELL AND S 
TO SW WINDS WAVES. FROM 02N TO 09N BETWEEN 120W AND 135W WINDS 
20 KT OR LESS. SEAS TO 8 FT IN SE SWELL AND S WIND WAVES. 
.24 HOUR FORECAST FROM 10N TO 13N BETWEEN 100W AND 111W SW WINDS 
20 TO 25 KT. SEAS 8 TO 9 FT. 
.48 HOUR FORECAST FROM 09N TO 12.5N BETWEEN 103W AND 117W SW TO 
W WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE FROM 08N TO 14N 
BETWEEN 97W AND 119W WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED SE 
SWELL AND SW WIND WAVES.

.POST-TROPICAL REMNANT LOW NORMA NEAR 22N116.5W 1010 MB. WITHIN 
120 NM NW QUADRANT WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED 
SWELL.
.24 HOUR FORECAST LOW TO DISSIPATE. CONDITIONS TO MERGE WITH 
AREA OF NW SWELL BELOW.

.FROM 14N TO 19N BETWEEN 132W AND 138W WINDS 20 KT OR LESS. SEAS 
TO 8 FT IN MIXED NE AND SE SWELL. 
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. 

.EXCEPT AS NOTED ABOVE...N OF 20N BETWEEN 117W AND 135W...AND 
FROM 21N TO 26N BETWEEN 135W AND 140W WINDS 20 KT OR LESS. SEAS 
TO 9 FT IN NW SWELL. 
.24 HOUR FORECAST N OF 20N BETWEEN 117W AND 127W WINDS 20 KT OR 
LESS. SEAS TO 8 FT IN MAINLY NW TO N SWELL.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.GULF OF CALIFORNIA N OF 29.5N SW WINDS 20 TO 25 KT. SEAS LESS 
THAN 8 FT. 
.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 0200 UTC FRI SEP 22... 

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 09N74W TO 09N87W TO LOW PRES NEAR 17.5N104W 
1008 MB TO 13N107W TO LOW PRES NEAR 10N137W 1010 MB TO BEYOND 
11N140W. SCATTERED MODERATE TO STRONG WITHIN 90 NM N AND 120 NM 
S OF TROUGH BETWEEN 80W AND 90W...WITHIN 90 NM N AND 180 NM S OF 
TROUGH BETWEEN 96W AND 140W. 

$$
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