404  
FZPN03 KNHC 130909 CCA  
HSFEP2  
 
CORRECTED TO ADD 48 HOUR REMARK TO THIRD PARAGRAPH  
 
HIGH SEAS FORECAST  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
1030 UTC THU AUG 13 2026  
 
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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 0600 UTC THU AUG 13.  
24 HOUR FORECAST VALID 0600 UTC FRI AUG 14.  
48 HOUR FORECAST VALID 0600 UTC SAT AUG 15.  
 
.WARNINGS.  
   
..TROPICAL STORM WARNING
 
 
.TROPICAL STORM HERNAN NEAR 18.1N 131.9W 1006 MB AT 0900 UTC AUG  
13 MOVING W OR 270 DEG AT 2 KT. MAXIMUM SUSTAINED WINDS 35 KT  
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM E  
SEMICIRCLE...30 NM SW QUADRANT AND 35 NM NW QUADRANT. SEAS TO 4  
M OR GREATER WITHIN 0 NM E SEMICIRCLE AND 60 NM W SEMICIRCLE.  
ELSEWHERE WITHIN 20N130W TO 21N132W TO 20N134W TO 18N135W TO 17N132W TO  
17N131W TO 20N130W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M.  
.24 HOUR FORECAST TROPICAL STORM HERNAN NEAR 17.3N 132.4W.  
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE  
WINDS WITHIN 0 NM E SEMICIRCLE...10 NM SW QUADRANT AND 20 NM NW  
QUADRANT. SEAS TO 4 M OR GREATER WITHIN 60 NM W QUADRANT.  
ELSEWHERE WITHIN 19N132W TO 19N133W TO 17N134W TO 17N133W TO  
18N132W TO 19N132W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER  
OF AREA WITHIN 22N131W TO 21N137W TO 18N137W TO 16N133W TO  
19N131W TO 19N129W TO 22N131W WINDS 20 KT OR LESS. SEAS 2.5 TO  
3.0 M IN MIXED SWELL.  
.36 HOUR FORECAST TROPICAL DEPRESSION HERNAN NEAR 16.5N 132.9W.  
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.  
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW HERNAN NEAR 15.8N  
133.7W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. ELSEWHERE  
WITHIN 21N132W TO 21N133W TO 20N135W TO 19N136W TO 18N134W TO  
19N133W TO 21N132W  
 
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.  
 
.WITHIN 18N136W TO 22N140W TO 08N140W TO 11N137W TO 14N136W TO  
18N136W E TO SE WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M IN S TO SW  
SWELL.  
.24 HOUR FORECAST WITHIN 24N137W TO 27N140W TO 13N140W TO  
21N137W TO 24N137W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE  
TO S SWELL.  
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.  
 
.WITHIN 11N86W TO 12N88W TO 11N90W TO 10N91W TO 10N90W TO 10N87W  
TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... E WINDS 20 TO 25  
KT. SEAS LESS THAN 2.5 M.  
.24 HOUR FORECAST LITTLE CHANGE.  
.48 HOUR FORECAST LITTLE CHANGE.  
 
.WITHIN 02N106W TO 04N112W TO 00N124W TO 03.4S120W TO 03.4S100W  
TO 02N106W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW  
SWELL.  
.24 HOUR FORECAST WITHIN 03N96W TO 06N105W TO 06N112W TO 00N128W  
TO 03.4S120W TO 03S95W TO 03N96W WINDS 20 KT OR LESS. SEAS 2.5  
TO 3.0 M IN S TO SW SWELL.  
.48 HOUR FORECAST WITHIN 02N102W TO 02N107W TO 01S120W TO  
03.4S120W TO 03.4S100W TO 02N102W WINDS 20 KT OR LESS. SEAS 2.5  
TO 3.0 M IN S TO SW SWELL.  
 
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.  
 
CONVECTION VALID AT 0900 UTC THU AUG 13...  
   
INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH
 
 
MONSOON TROUGH FROM 09N78W TO 07N95W TO 08N110W. ITCZ FROM  
08N110W TO 09N120W. SCATTERED MODERATE TO ISOLATED STRONG  
FROM 05N TO 13N BETWEEN 85W AND 105W.  
 

 
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.  
 
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