000
FZPN03 KNHC 030917
HSFEP2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1030 UTC SAT AUG 03 2013

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SAT AUG 03.
24 HOUR FORECAST VALID 0600 UTC SUN AUG 04.
48 HOUR FORECAST VALID 0600 UTC MON AUG 05.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GIL NEAR 14.9N 131.4W 999 MB AT 0900 UTC AUG 03 
MOVING W OR 275 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 50 KT 
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N 
SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
90 NM N SEMICIRCLE AND 45 NM S SEMICIRCLE WITH SEAS TO 20 FT. 
ELSEWHERE WITHIN 240 NM N AND 90 NM S SEMICIRCLES WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM GIL NEAR 14.8N 134.0W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. LITTLE CHANGE IN RADIUS OF 
TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER. ELSEWHERE 
WITHIN 200 NM N AND 60 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 
8 TO 12 FT.  
.48 HOUR FORECAST TROPICAL STORM GIL NEAR 14.0N 137.0W. MAXIMUM 
SUSTAINED WINDS 40 KT GUSTS 50 KT. LITTLE CHANGE IN RADIUS OF 
TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER WITH SEAS 
TO 17 FT. ELSEWHERE WITHIN 180 NM N AND 30 NM S SEMICIRCLES  
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.72 HOUR FORECAST TROPICAL STORM GIL NEAR 13.3N 140.0W. MAXIMUM 
SUSTAINED WINDS 40 KT GUSTS 50 KT. EXTENDED OUTLOOK...USE FOR 
GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM GIL NEAR 13.0N 142.0W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST TROPICAL DEPRESSION GIL NEAR 13.0N 145.5W. 
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.LOW PRES AT 13N121W 1009 MB. WITHIN 60 NM OF CENTER WINDS 20
TO 25 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N124W 1009 MB. WITHIN 60 NM OF CENTER WINDS 20 TO 25 KT.
SEAS TO 9 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N127W 1009 MB. WITHIN 60 NM OF CENTER WINDS 20 TO 25 KT. SEAS 
TO 9 FT.
 
.FROM 09N TO 20N W OF 135W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 
IN MIXED SWELL.
.48 HOUR FORECAST  CONDITIONS MERGE WITH TROPICAL STORM GIL. 

.CONVECTION VALID 0900 UTC SAT AUG 03...

.TROPICAL STORM GIL...NUMEROUS MODERATE TO STRONG WITHIN 100 NM 
N SEMICIRCLE AND 30 NM S SEMICIRCLE. 

.LOW PRES CENTER 1009 MB AT 13N121W...SCATTERED MODERATE TO 
STRONG CONVECTION WITHIN 150 NM S QUADRANT.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...                
MONSOON TROUGH FROM 09N84W TO 10N105W TO 1009 MB LOW PRES AT 
13N121W TO 13N127W. ITCZ  FROM 13N135W TO 13N140W. SCATTERED 
MODERATE TO STRONG WITHIN 180 NM S OF AXIS FROM 123W TO 127W. 

$$
.FORECASTER DGS. NATIONAL HURRICANE CENTER.