318
FZPN03 KNHC 131454
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC THU AUG 13.
24 HOUR FORECAST VALID 1200 UTC FRI AUG 14.
48 HOUR FORECAST VALID 1200 UTC SAT AUG 15.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM HERNAN NEAR 18.0N 131.9W 1004 MB AT 1500 UTC AUG
13 MOVING WSW OR 245 DEG AT 3 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM NE
QUADRANT...0 NM SE QUADRANT...50 NM SW QUADRANT...AND 80 NM NW
QUADRANT.  SEAS 4 M OR GREATER WITHIN 0 NM E SEMICIRCLE AND 60
NM W SEMICIRCLE WITH SEAS TO 4 M. ELSEWHERE WITHIN 19N130W TO
22N132W TO 21N134W TO 18N135W TO 15N133W TO 16N131W TO 19N130W
WINDS 20 TO 33 KT. SEAS 2.5 TO 4.0 M.
.24 HOUR FORECAST TROPICAL STORM HERNAN NEAR 17.1N 132.1W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 30 NM NE AND SW QUADRANTS...40 NM NW QUADRANT AND 0
NM SE QUADRANT. SEAS 4 M OR GREATER WITHIN 45 NM OF
CENTER...EXCEPT 0 NM SE QUADRANT WITH SEAS TO 4.0 M. ELSEWHERE
WITHIN 18N133W TO 17N134W TO 17N133W TO 17N132W TO 18N133W WINDS
20 TO 33 KT. SEAS 3.0 TO 4.0 M. REMAINDER AREA WITHIN 21N132W TO
20N137W TO 18N136W TO 16N133W TO 19N133W TO 19N131W TO 21N132W
WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SWELL.
.36 HOUR FORECAST POST-TROPICAL REMNANT LOW HERNAN NEAR 16.5N
132.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW HERNAN NEAR 15.9N
133.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 22N132W
TO 19N137W TO 17N137W TO 15N135W TO 16N133W TO 18N132W TO
22N132W WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.

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 20N138W TO 22N140W TO 09N140W TO 11N139W TO 15N138W TO
20N138W SE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 25N138W TO 27N140W TO 16N140W TO
17N139W TO 20N138W TO 25N138W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN MIXED SWELL.
.48 HOUR FORECAST WITHIN 23N139W TO 26N140W TO 20N140W TO
22N138W TO 23N139W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
MIXED SWELL.

.WITHIN 11N86W TO 12N87W TO 12N89W TO 10N90W TO 09N89W TO 10N86W
TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E WINDS 20
TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 11N86W TO 12N87W TO 11N89W TO 10N89W TO
09N87W TO 10N86W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 11N86W TO 12N86W TO 11N88W TO 10N88W TO
10N87W TO 10N86W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...
NE WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.

.WITHIN 05N109W TO 05N117W TO 00N130W TO 03.4S120W TO 03.4S97W
TO 05N109W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW
SWELL.
.24 HOUR FORECAST WITHIN 05N96W TO 05N111W TO 00N129W TO
03.4S120W TO 03.4S88W TO 05N96W...EXCEPT LEE OF GALAPAGOS
ISLANDS... WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW
SWELL.
.48 HOUR FORECAST WITHIN 02S103W TO 01N110W TO 00N116W TO
01S120W TO 03.4S120W TO 03.4S102W TO 02S103W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL.

.42 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 14N96W TO
14N95W TO 15N94W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC... N WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 13N96W TO 13N95W TO
15N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC... N WINDS
20 TO 25 KT. SEAS LESS THAN 2.5 M.

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

CONVECTION VALID AT 1450 UTC THU AUG 13...

T.S. HERNAN...SCATTERED MODERATE TO STRONG WITHIN 60 NM NE
SEMICIRCLE.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N84W TO 08N92W TO 08N101W. ITCZ FROM
08N101W TO 10N121W. SCATTERED MODERATE ISOLATED STRONG FROM 04N
TO 10N BETWEEN 85W AND 101W...AND FROM 03N TO 13N BETWEEN 102W
AND 134W.

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.