634
FZPN03 KNHC 280834
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC WED OCT 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 WED OCT 28.
24 HOUR FORECAST VALID 0600 UTC THU OCT 29.
48 HOUR FORECAST VALID 0600 UTC FRI OCT 30.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM VANCE NEAR 18.6N 108.6W 1003 MB AT 0900 UTC OCT
28 MOVING N OR 360 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM W SEMICIRCLE
...70 NM NE QUADRANT AND 60 NM SE QUADRANT. SEAS 4 M OR GREATER
WITHIN 60 NM N SEMICIRCLE...45 NM SE QUADRANT AND 15 NM SW
QUADRANT WITH SEAS TO 4 M. ELSEWHERE WITHIN 19N106W TO 20N107W
TO 20N109W TO 17N110W TO 16N108W TO 17N106W TO 19N106W...
INCLUDING NEAR CABO CORRIENTES...WINDS 20 TO 33 KT. SEAS 2.5 TO
4.0 M. REMAINDER OF AREA WITHIN 20N106W TO 21N108W TO 19N111W TO
17N111W TO 16N107W TO 17N106W TO 20N106W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.5 M IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM VANCE NEAR 21.6N 108.3W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 0 NM W SEMICIRCLE...50 NM NE QUADRANT AND 40 NM SE
QUADRANT. SEAS 4 M OR GREATER WITHIN 60 NM NE SEMICIRCLE...AND 0
NM SW SEMICIRCLE WITH SEAS TO 4 M. ELSEWHERE WITHIN 23N107W TO
23N108W TO 21N109W TO 20N108W TO 20N107W TO 21N106W TO 23N107W
...INCLUDING NEAR CABO CORRIENTES...WINDS 20 TO 33 KT. SEAS 2.5
TO 4.0 M. REMAINDER OF AREA WITHIN 22N106W TO 23N107W TO 22N110W
TO 21N110W TO 19N108W TO 20N106W TO 22N106W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.5 M IN MIXED SWELL.
.36 HOUR FORECAST POST-TROPICAL REMNANT LOW VANCE NEAR 23.1N
108.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.48 HOUR FORECAST POST-TROPICAL VANCE INLAND NEAR 25.2N 107.1W.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. OVER FORECAST WATERS
CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 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 16N94W TO 16N95W TO 16N96W TO 14N96W TO 14N95W TO 16N94W
...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30
KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

.SLOW MOVING COLD FRONT FROM 30N138W TO 25.5N140W. WITHIN
30N136W TO 30N139W TO 28N137W TO 29N136W TO 30N136W SE TO S WINDS
20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST LITTLE CHANGE...EXCEPT FRONT STATIONARY.
.48 HOUR FORECAST LOW PRES FORMING NEAR 29N137W 1012 MB WITH COLD
FRONT FROM LOW TO 20N140W AND WARM FRONT FROM LOW TO 25N134W.
WITHIN 30N137W TO 30N140W TO 29N140W TO 29N139W TO 30N137W NE
WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.

.WITHIN 00N105W TO 03N112W TO 01N113W TO 01N117W TO 03.4S120W TO
03S106W TO 00N105W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN
MIXED NE AND S TO SW SWELL.
.24 HOUR FORECAST WITHIN 02N116W TO 01N128W TO 00N128W TO
01S120W TO 03.4S120W TO 03S109W TO 02N116W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN MIXED NE AND S TO SW SWELL.
.48 HOUR FORECAST WITHIN 00N104W TO 01N113W TO 06N115W TO
00N128W TO 03.4S120W TO 03.4S101W TO 00N104W 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 0600 UTC WED OCT 28...

.TROPICAL STORM VANCE...NUMEROUS MODERATE TO STRONG WITHIN 240
NM NE SEMICIRCLE...AND 0 NM ELSEWHERE.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 12N74W TO 05N86W TO 08N98W WELL SE OF
TROPICAL STORM VANCE...THEN RESUMES WELL SW OF VANCE FROM
07N114W TO 06N126W TO 1011 MB LOW PRES NEAR 08N136.5W TO
06N140W. SCATTERED MODERATE ISOLATED STRONG FROM 12N TO 17N
BETWEEN 124W AND 129W...AND FROM 00N TO 10N BETWEEN 133W AND
140W. ISOLATED TO WIDELY SCATTERED MODERATE WITHIN 02N117W TO
13N105W TO 17N106W TO 17N103W TO 11N103W TO 02N117W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.