HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC TUE NOV 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE NOV 21.
24 HOUR FORECAST VALID 0000 UTC WED NOV 22.
48 HOUR FORECAST VALID 0000 UTC THU NOV 23.

.WARNINGS.

...GULF OF TEHUANTEPEC GALE WARNING...

.WITHIN 30 NM EITHER SIDE OF LINE FROM 16N95W TO
14N96W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO
25 KT. SEAS TO 9 FT. ELSEWHERE FROM 09N TO 15N BETWEEN 94W AND
102W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT PRIMARILY IN NE SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST N OF 15N BETWEEN 94W AND 96W N WINDS 25 TO 35
KT. SEAS 8 TO 10 FT.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 30N139W TO 26N140W. W OF FRONT S WINDS 20 TO 30 KT.
SEAS 8 TO 10 FT. 
.24 HOUR FORECAST TROUGH FROM 30N135W TO 24N140W. FROM 25N TO 
30N BETWEEN 130W AND 140W SW WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST COLD FRONT FROM 30N136W TO 21N140W. WITHIN 
AREA BOUNDED BY 30N140W TO 30N120W TO 19N140W TO 30N140W WINDS 20
KT OR LESS. SEAS 8 TO 11 FT IN NW SWELL.

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

CONVECTION VALID AT 0300 UTC TUE NOV 21...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM 08N78W TO 06N105W. ITCZ EXTENDS
FROM 06N105W TO 12N140W. SCATTERED MODERATE WITHIN 60 NM OF ITCZ
BETWEEN 125W AND 140W. 

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