FZPN03 KNHC 232125
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC SUN AUG 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SUN AUG 23.
24 HOUR FORECAST VALID 1800 UTC MON AUG 24.
48 HOUR FORECAST VALID 1800 UTC TUE AUG 25.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM ISELLE NEAR 16.9N 115.1W 1001 MB AT 2100 UTC AUG 23 
MOVING NW OR 315 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 
55 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM E SEMICIRCLE...110 
NM SW QUADRANT AND 0 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 90 
NM E SEMICIRCLE...45 NM SW QUADRANT AND 0 NM NW QUADRANT WITH SEAS 
TO 5.0 M. ELSEWHERE WITHIN 180 NM OF CENTER...EXCEPT 120 NM SW 
QUADRANT WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OF THE AREA 
FROM 10.5N TO 13N BETWEEN 112W AND 118W S TO SW WINDS 20 TO 30 KT. 
SEAS 2.5 TO 3.0 M. 
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 19.6N 117.8W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE 
WINDS WITHIN 120 NM NE QUADRANT...130 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 60 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 180 NM 
E SEMICIRCLE...120 NM SW QUADRANT AND 90 NM NW QUADRANT WITH SEAS TO 
6.0 M. ELSEWHERE WITHIN 210 NM E SEMICIRCLE AND 150 NM W SEMICIRCLE 
OF CENTER WINDS 20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER OF THE 
AREA FROM 12N TO 23N BETWEEN 111W AND 121W WINDS 20 KT OR LESS. SEAS 
2.5 TO 3.0 M IN MIXED SWELL. 
.36 HOUR FORECAST HURRICANE ISELLE NEAR 20.8N 119.4W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.48 HOUR FORECAST HURRICANE ISELLE NEAR 21.4N 121.1W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 
130 NM NE QUADRANT...110 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 
NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210 NM E SEMICIRCLE...AND 
120 NM W SEMICIRCLE OF CENTER WITH SEAS TO 7.0 M. ELSEWHERE WITHIN 
240 NM E SEMICIRCLE AND 180 NM W SEMICIRCLE OF CENTER WINDS 20 TO 33 
KT. SEAS 3.0 TO 4.0 M. REMAINDER OF THE AREA FROM 14N TO 27N BETWEEN 
113W AND 125W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL. 

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.

.N OF 14.5N BETWEEN 94.5W AND 95.5W...INCLUDING THE GULF OF 
TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.12 HOUR FORECAST N OF 13.5N BETWEEN 94.5W AND 95.5W...INCLUDING THE 
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS 2.5 M.
.24 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING THE 
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS 2.5 M.
.48 HOUR FORECAST N OF 14N BETWEEN 94.5W AND 95.5W...INCLUDING THE 
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS 2.5 M

.FROM 10N TO 11.5N E OF 90W...INCLUDING THE GULF OF PAPAGAYO...NE TO 
E WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.12 HOUR FORECAST 10N TO 12N E OF 90W...INCLUDING THE GULF OF 
PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST FROM 10N TO 11.5N E OF 90W...INCLUDING THE GULF OF 
PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF CALIFORNIA N OF 27N SE TO S WINDS 20 TO 25 KT. SEAS LESS 
THAN 2.5 M. 
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

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

CONVECTION VALID AT 2100 UTC SUN AUG 23...

.T.S. ISELLE...NUMEROUS MODERATE TO STRONG WITHIN 180 NM SW 
SEMICIRCLE.  

.INVEST EP91...SCATTERED MODERATE TO ISOLATED STRONG FROM 10N TO 
12.5N BETWEEN 120W AND 126W.

.TROPICAL WAVE ALONG 87W...SCATTERED MODERATE ISOLATED STRONG
FROM 03N TO 10N BETWEEN 87W AND 92W.

.TROPICAL WAVE ALONG 101W...SCATTERED MODERATE ISOLATED STRONG 
FROM 10N TO 18N BETWEEN 92W AND 106W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 09N84W TO 06N95W TO 11N110W THEN 
CONTINUES SW OF ISELLE FROM 12N119W TO 08N130W TO BEYOND 07N140W.
ASIDE FROM THE CONVECTION RELATED TO THE TROPICAL WAVES...INVEST 
AREA EP91 AND T.S. ISELLE DESCRIBED ABOVE...SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION CAN BE FOUND FROM FROM 03N TO 12N W OF 
126W. 

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.