000
FZPN03 KNHC 240844
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC TUE AUG 24 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE AUG 24.
24 HOUR FORECAST VALID 0600 UTC WED AUG 25.
48 HOUR FORECAST VALID 0600 UTC THU AUG 26.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM MARTY NEAR 20.6N 117.0W 1003 MB AT 0900 UTC AUG
24 MOVING W OR 270 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
30 NM NW AND SE QUADRANTS...45 NM NE QUADRANT AND 0 NM SW 
QUADRANT WITH SEAS TO 13 FT. ELSEWHERE WITHIN 20N116W TO 20N117W
TO 22N118W TO 22N117W TO 22N115W TO 20N116W WINDS 20 TO 33 KT. 
SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL DEPRESSION MARTY NEAR 20.6N 120.9W. 
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 20N120W TO 
20N122W TO 21N122W TO 22N121W TO 22N120W TO 20N120W WINDS 20 TO 
30 KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW MARTY NEAR 20.6N 
124.8W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 21N124W
TO 21N125W TO 22N125W TO 22N124W TO 21N124W WINDS 20 TO 25 KT. 
SEAS 8 FT.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW MARTY NEAR 19.8N 
129.5W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST POST-TROPICAL REMNANT LOW MARTY NEAR 18.5N 
134.5W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.
.120 HOUR FORECAST...DISSIPATED.

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 15N95W TO 14N96W TO 15N96W TO 16N96W TO 16N94W TO 15N95W
...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.WITHIN 09N131W TO 09N132W TO 11N133W TO 13N132W TO 11N130W TO
09N131W SW TO W WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.WITHIN 10N123W TO 10N125W TO 12N125W TO 13N123W TO 12N122W TO
10N123W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.WITHIN 10N110W TO 10N115W TO 11N117W TO 13N116W TO 13N110W TO
10N110W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST WITHIN 10N111W TO 10N113W TO 11N113W TO 
13N111W TO 12N110W TO 10N111W WINDS 20 KT OR LESS. SEAS 8 FT IN S
TO SW SWELL.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
12N98W 1009 MB. WITHIN 08N96W TO 07N100W TO 12N102W TO 12N100W TO
10N97W TO 08N96W WINDS 20 KT OR LESS. SEAS 8 FT IN S TO SW 
SWELL.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 0720 UTC TUE AUG 24...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N74W TO 14N107W TO 12N120W TO 13N130W TO 
11N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 300 NM OF 
COAST BETWEEN 77W AND 101W. SIMILAR CONVECTION FROM 10N TO 24N 
BETWEEN 104W AND 110W. SCATTERED MODERATE FROM 08N TO 13N BETWEEN
115W AND 135W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.