604 
FZPN03 KNHC 252137
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC TUE AUG 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC TUE AUG 25.
24 HOUR FORECAST VALID 1800 UTC WED AUG 26.
48 HOUR FORECAST VALID 1800 UTC THU AUG 27.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM ISELLE NEAR 21.0N 121.8W 994 MB AT 2100 UTC AUG
25 MOVING WNW OR 285 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM NE
QUADRANT...170 NM SE QUADRANT...60 NM SW QUADRANT...AND 120 NM
NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM NE QUADRANT...200
NM SE QUADRANT...120 NM SW QUADRANT...AND 180 NM NW QUADRANT 
WITH SEAS TO 8.5 M. ELSEWHERE WITHIN 24N119W TO 25N122W TO 23N125W
 TO 20N124W TO 20N120W TO 19N117W TO 24N119W WINDS 20 TO 33 KT. 
SEAS 3.0 TO 4.5 M. REMAINDER OF AREA WITHIN 25N115W TO 28N116W 
TO 27N122W TO 24N126W TO 20N126W TO 15N117W TO 25N115W WINDS 20 
KT OR LESS. SEAS 2.5 TO 3.5 M IN SE TO S SWELL. 
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.8N 124.7W. 
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE 
WINDS WITHIN 100 NM NE QUADRANT...60 NM SE QUADRANT...20 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 150 
NM N SEMICIRCLE...0 NM N SEMICIRCLE WITH SEAS TO 6.0 M. ELSEWHERE
WITHIN 25N123W TO 25N126W TO 24N127W TO 22N127W TO 21N124W TO 
22N122W TO 25N123W WINDS 20 TO 33 KT. SEAS 3.0 TO 5.0 M. 
REMAINDER OF AREA WITHIN 26N120W TO 27N125W TO 25N130W TO 20N130W
TO 19N126W TO 20N120W TO 26N120W WINDS 20 KT OR LESS. SEAS 2.5 
TO 3.5 M IN E TO SE SWELL.
.36 HOUR FORECAST POST-TROPICAL REMNANT LOW ISELLE NEAR 22.4N 
126.6W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS TO 4.5 M.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW ISELLE NEAR 23.0N 
128.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 24N128W
TO 26N131W TO 24N131W TO 23N131W TO 24N130W TO 23N128W TO 
24N128W WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE WITHIN 
27N127W TO 27N129W TO 26N132W TO 22N132W TO 22N129W TO 24N126W TO
27N127W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN E TO SE SWELL.

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

...GALE WARNING...
.REMNANTS OF JULIO NEAR 21.0N 119.5W 1003 MB AT 2100 UTC AUG 25
MOVING N OR 350 DEG AT 22 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. GALE FORCE WINDS WITHIN 0 NM W SEMICIRCLE...80 NM 
NE QUADRANT AND 60 NM SE QUADRANT. SEAS 4 M OR GREATER WITHIN 0 
NM W SEMICIRCLE...90 NM NE QUADRANT AND 120 NM SE QUADRANT WITH 
SEAS TO 4.5 M.
.06 HOUR FORECAST REMNANTS OF JULIO AND ASSOCIATED CONDITIONS TO
BECOME ABSORBED INTO EASTERN SEMICIRCLE OF ISELLE.
.12 HOUR FORECAST DISSIPATED JULIO NEAR 22.5N 121.0W. 

.SYNOPSIS AND FORECAST.

.WITHIN 11N86W TO 11N87W TO 11N88W TO 10N88W TO 10N87W TO
11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E WINDS 20 TO
25 KT. SEAS TO 2.5 M.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST FROM 10.5N TO 12N E OF 88W W WINDS 20 TO 25 KT.
SEAS LESS THAN 2.5 M.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF TEHUANTEPEC N OF 14.5N N WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST GULF OF TEHUANTEPEC N OF 15N N WINDS 20 TO 25 
KT. SEAS LESS THAN 2.5 M. 
.48 HOUR FORECAST LITTLE CHANGE.

.18 HOUR FORECAST WITHIN 00N126W TO 00N127W TO 00N127W TO 
03.4S120W TO 03.4S119W TO 03S120W TO 00N126W WINDS 20 KT OR LESS.
SEAS 2.5 M IN S TO SW SWELL. 
.24 HOUR FORECAST WITHIN 01S119W TO 01N126W TO 00N130W TO 
03.4S120W TO 03.4S118W TO 03S119W TO 01S119W WINDS 20 KT OR LESS.
SEAS 2.5 M IN S TO SW SWELL. 
.48 HOUR FORECAST WITHIN 01N107W TO 00N110W TO 03N114W TO 
01S111W TO 03.4S111W TO 03S108W TO 01N107W WINDS 20 KT OR LESS. 
SEAS 2.5 M IN S TO SW SWELL.

.27 HOUR FORECAST LOW PRES NEAR 09N109.5W 1005 MB. WITHIN 
13N106W TO 14N108W TO 13N108W TO 12N108W TO 12N107W TO 12N106W TO
13N106W E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M. WITHIN 
09N107W TO 09N108W TO 08N108W TO 07N110W TO 07N109W TO 08N107W TO
09N107W S TO SW WINDS 20 TO 25 KT. SEAS 2.5 M IN S TO SW SWELL.
.48 HOUR FORECAST LOW PRES NEAR 11N112W 1003 MB. WITHIN 12N108W 
TO 14N109W TO 16N112W TO 14N114W TO 07N113W TO 07N110W TO 12N108W
WINDS 20 TO 25 KT. SEAS 3.0 TO 4.0 M IN S TO SW SWELL. ELSEWHERE
WITHIN 10N106W TO 15N110W TO 14N114W TO 10N112W TO 04N112W TO 
03N107W TO 10N106W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN S TO
SW SWELL.

.39 HOUR FORECAST WITHIN 11N131W TO 11N132W TO 10N133W TO
09N132W TO 09N131W TO 11N131W SW WINDS 20 TO 25 KT. SEAS 2.5 M 
IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 12N131W TO 11N131W TO 10N132W TO 
09N132W TO 10N131W TO 10N130W TO 12N131W SW WINDS 20 TO 25 KT. 
SEAS 2.5 TO 3.0 M IN S TO SW SWELL. ELSEWHERE WITHIN 12N129W TO 
13N130W TO 12N131W TO 09N132W TO 09N131W TO 11N129W TO 12N129W SW
WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW SWELL.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 2100 UTC TUE AUG 25...

.TROPICAL STORM ISELLE...NUMEROUS MODERATE ISOLATED STRONG 
CONVECTION FROM 21.5N TO 24.5N BETWEEN 119W AND 122W AND SCATTERED
MODERATE ELSEWHERE FROM 20N TO 25N BETWEEN 118W AND 122W.

.REMNANTS OF JULIO...NUMEROUS MODERATE ISOLATED STRONG IN A 
NARROW BAND FROM 13N TO 20.5N BETWEEN 117.5W AND 122W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N75W TO 08.5N97W TO 08.5N102W TO 13N112W 
THEN RESUMES SW OF JULIO FROM 14N121W TO LOW PRES NEAR 10N140W 
1008 MB. SCATTERED TO NUMEROUS MODERATE TO STRONG CONVECTION 
FROM 03.5N TO 08.5N E OF 91W AND FROM 06N TO 13N BETWEEN 90W AND 
99W. SCATTERED TO NUMEROUS MODERATE ISOLATED STRONG CONVECTION 
FROM 05N TO 15.5N BETWEEN 99W AND 112W. SCATTERED TO LOCALLY 
NUMEROUS MODERATE ISOLATED STRONG CONVECTION FROM 07N TO 12N 
BETWEEN 120W AND 128W AND FROM 03.5N TO 12N BETWEEN 128W AND 
143W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.