459
FZPN03 KNHC 251551
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC TUE AUG 25.
24 HOUR FORECAST VALID 1200 UTC WED AUG 26.
48 HOUR FORECAST VALID 1200 UTC THU AUG 27.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM ISELLE NEAR 20.9N 121.1W 988 MB AT 1500 UTC AUG
25 MOVING WNW OR 295 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 60 KT
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE
QUADRANT...180 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 NM NW
QUADRANT.  SEAS 4 M OR GREATER WITHIN 180 NM W SEMICIRCLE...240
NM NE QUADRANT AND 210 NM SE QUADRANT WITH SEAS TO 8.5 M.
ELSEWHERE WITHIN 22N117W TO 24N121W TO 22N124W TO 20N123W TO
19N119W TO 20N117W TO 22N117W WINDS 20 TO 33 KT. SEAS 3.5 TO 6.5 M
IN TO E SWELL. REMAINDER OF AREA WITHIN 23N113W TO 27N116W TO
26N121W TO 23N124W TO 19N124W TO 18N115W TO 23N113W WINDS 20 KT
OR LESS. SEAS 2.5 TO 5.5 M IN S TO E SWELL.
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 22.0N 124.1W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 120 NM NE QUADRANT...110 NM SE QUADRANT...40 NM SW
QUADRANT...AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210
NM N SEMICIRCLE...240 NM SE QUADRANT AND 180 NM SW QUADRANT WITH
SEAS TO 6.5 M. ELSEWHERE WITHIN 24N121W TO 25N124W TO 25N125W TO
23N126W TO 21N123W TO 22N121W TO 24N121W WINDS 20 TO 33 KT. SEAS
3.5 TO 5.5 M. REMAINDER OF AREA WITHIN 28N117W TO 30N123W TO
28N126W TO 22N129W TO 19N126W TO 19N118W TO 28N117W WINDS 20 KT
OR LESS. SEAS 2.5 TO 4.5 M IN S TO SE SWELL.
.48 HOUR FORECAST TROPICAL STORM ISELLE NEAR 23.3N 127.9W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 0 NM S SEMICIRCLE...40 NM NE QUADRANT AND 30 NM NW
QUADRANT. SEAS 4 M WITHIN 120 NM N QUADRANT. ELSEWHERE WITHIN
25N126W TO 26N128W TO 25N129W TO 24N129W TO 23N128W TO 23N126W TO
25N126W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OR AREA
WITHIN 26N123W TO 28N128W TO 26N132W TO 22N132W TO 20N129W TO
23N124W TO 26N123W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN E TO
SE SWELL.

...TROPICAL STORM WARNING...
.TROPICAL STORM JULIO NEAR 18.0N 118.9W 1001 MB AT 1500 UTC AUG
25 MOVING NNE OR 015 DEG AT 19 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM NE
QUADRANT...110 NM SE QUADRANT...70 NM SW QUADRANT...AND 30 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 90 NM SE SEMICIRCLE...75 NM
NE QUADRANT AND 30 NM NW QUADRANT WITH SEAS TO 5.0 M. ELSEWHERE
WITHIN 19N116W TO 20N117W TO 18N119W TO 17N119W TO 16N118W TO
14N118W TO 19N116W WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M.
REMAINDER OF AREA WITHIN 19N115W TO 20N117W TO 16N118W TO
18N120W TO 12N121W TO 14N117W TO 19N115W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.5 M IN S TO SE SWELL.
.12 HOUR FORECAST TROPICAL STORM JULIO NEAR 20.8N 119.0W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. SEAS TO 4.5 M.
.24 HOUR FORECAST...LOW DISSIPATED AND BECOMING ABSORBED WITHIN
CIRCULATION OF ISELLE.

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 16N95W TO 15N95W TO 15N96W TO 14N96W TO 15N95W TO
16N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO
25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST WITHIN 16N95W TO 15N96W TO 14N96W TO 14N95W TO
16N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 20
TO 25 KT. SEAS TO 2.5 M IN N TO NE SWELL.
.48 HOUR FORECAST WITHIN 15N95W TO 16N95W TO 15N95W TO 14N96W TO
15N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 20
TO 25 KT. SEAS LESS THAN 2.5 M.

.WITHIN 11N87W TO 11N88W TO 10.5N88.5W TO 10N88.5W TO 10N87.5W
TO 10.5N87W TO 11N87W...INCLUDING THE GULF OF PAPAGAYO... WINDS
20 KT OR LESS. SEAS TO 2.5 M IN NE TO E SWELL.
.24 HOUR FORECAST WITHIN 11N86.5W TO 11N89W TO 10.5N89.5W TO
10.5N88.5W TO 10.5N86.5W TO 11N86.5W...INCLUDING THE GULF OF
PAPAGAYO... WINDS 20 KT OR LESS. SEAS TO 2.5 M IN E TO SE SWELL.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.18 HOUR FORECAST WITHIN 00N125W TO 00N133W TO 00N133W TO
03.4S120W TO 03.4S118W TO 02S120W TO 00N125W WINDS 20 KT OR
LESS. SEAS 2.5 M IN S TO SW SWELL.
.24 HOUR FORECAST WITHIN 01S118W TO 00N124W TO 01N133W TO
00N134W TO 03.4S120W TO 03.4S117W TO 01S118W WINDS 20 KT OR LESS.
SEAS 2.5 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 05N107W TO 04N117W TO 01N119W TO
00N131W TO 03.4S120W TO 03.4S103W TO 05N107W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN S TO SW SWELL.

.48 HOUR FORECAST LOW PRES NEAR 10N111W 1006 MB. WITHIN 10N109W
TO 09N110W TO 08N112W TO 07N111W TO 08N110W TO 09N109W TO 10N109W
SW WINDS 20 TO 25 KT. SEAS TO 2.5 M IN S TO SW SWELL. ELSEWHERE WITHIN
08N107W TO 10N108W TO 09N110W TO 07N112W TO 05N110W TO 05N108W
TO 08N107W WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW SWELL.
WITHIN 13N109W TO 14N109W TO 14N110W TO 12N110W TO 12N109W TO
13N108W TO 13N109W E WINDS 20 TO 25 KT. SEAS 2.5 M IN SE TO S
SWELL.

.48 HOUR FORECAST WITHIN 12N130W TO 10N132W TO 10N131W TO
11N130W TO 11N129W TO 12N130W SW WINDS 20 TO 30 KT. SEAS TO 2.5
M IN S TO SW SWELL. WITHIN 12N132W TO 13N133W TO 11N134W TO
10N136W TO 08N136W TO 09N134W TO 12N132W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN S SWELL.

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

CONVECTION VALID AT 1500 UTC TUE AUG 25...

.TROPICAL STORM ISELLE...NUMEROUS MODERATE TO STRONG FROM 20.5N
TO 23N BETWEEN 119W AND 121W AND SCATTERED MODERATE ELSEWHERE
FROM 20N TO 24N BETWEEN 115W AND 122W.

.TROPICAL STORM JULIO...NUMEROUS MODERATE TO STRONG FROM 15N TO
17.5N BETWEEN 118.5W AND 121W AND SCATTERED MODERATE ISOLATED
STRONG ELSEWHERE FROM 10N TO 17N BETWEEN 117W AND 124W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM 10N75W TO 08N109W...THEN
RESUMES SW OF JULIO FROM 15N122W TO LOW PRES NEAR 10N138W 1007 MB
TO BEYOND 09.5N140W. SCATTERED MODERATE TO STRONG CONVECTION FROM
02.5N TO 08.5N E OF 90W AND FROM 02N TO 13N BETWEEN 90W AND
100W. SCATTERED TO NUMEROUS MODERATE ISOLATED STRONG CONVECTION
FROM 05N TO 14N BETWEEN 100W AND 111W. SCATTERED TO LOCALLY
NUMEROUS MODERATE TO STRONG CONVECTION FROM 04N TO 12N BETWEEN
121W AND 143W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.