000
FZPN03 KNHC 152141
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC TUE AUG 15 2023

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE AUG 15.
24 HOUR FORECAST VALID 1800 UTC WED AUG 16.
48 HOUR FORECAST VALID 1800 UTC THU AUG 17.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE FERNANDA NEAR 17.3N 122.8W 971 MB AT 2100 UTC AUG 15 
MOVING W OR 280 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 90 KT GUSTS
110 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM N 
SEMICIRCLE...50 NM SE QUADRANT AND 60 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 90 NM S SEMICIRCLE...120 NM NE QUADRANT AND 105
NM NW QUADRANT WITH SEAS TO 30 FT. ELSEWHERE WITHIN 18N120W TO 
20N123W TO 20N125W TO 16N124W TO 15N123W TO 16N120W TO 18N120W 
WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 
14N117W TO 21N121W TO 15N121W TO 19N126W TO 15N127W TO 09N119W TO
14N117W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE FERNANDA NEAR 17.6N 127.2W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM N SEMICIRCLE...30 NM SE QUADRANT AND 40 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM OF CENTER WITH SEAS 
TO 22 FT. ELSEWHERE WITHIN 20N127W TO 21N129W TO 20N131W TO 
17N130W TO 16N128W TO 17N126W TO 20N127W WINDS 20 TO 33 KT. SEAS 
10 TO 12 FT. REMAINDER OF AREA WITHIN 21N125W TO 22N127W TO 
19N132W TO 14N131W TO 13N125W TO 15N124W TO 21N125W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.36 HOUR FORECAST TROPICAL STORM FERNANDA NEAR 17.7N 129.9W. 
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
.48 HOUR FORECAST POST-TROPICAL FERNANDA NEAR 17.9N 132.8W. 
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE 
WINDS WITHIN 50 NM NE QUADRANT...10 NM SE QUADRANT...0 NM SW 
QUADRANT...AND 40 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 60
NM OF CENTER EXCEPT 30 NM SE QUADRANT WITH SEAS TO 15 FT. 
ELSEWHERE WITHIN 19N132W TO 20N134W TO 20N135W TO 18N135W TO 
17N134W TO 17N132W TO 19N132W WINDS 20 TO 33 KT. SEAS 10 TO 12 
FT. REMAINDER OF AREA WITHIN 21N130W TO 20N132W TO 22N134W TO 
19N136W TO 15N134W TO 16N130W TO 21N130W WINDS 20 KT OR LESS. 
SEAS 8 TO 10 FT IN MIXED SWELL.
.60 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 18.2N 
135.8W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 18.4N 
138.8W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 18.4N 
144.9W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 18.2N
150.5W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

...GALE WARNING...
.LOW PRES NEAR 10.3N98.8W 1007 MB. WITHIN 14N92W TO 16N96W TO 
13N100W TO 09N98W TO 09N95W TO 14N92W...INCLUDING THE GULF OF 
TEHUANTEPEC...SE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14N108W 1004 MB. WITHIN 13N102W TO 13N104W TO 12N104W TO 11N103W 
TO 11N102W TO 13N102W WINDS 30 TO 40 KT. SEAS 12 TO 14 FT. 
ELSEWHERE WITHIN 16N96W TO 17N102W TO 15N105W TO 06N107W TO 
05N98W TO 07N96W TO 16N96W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14N108W 1001 MB. WITHIN 17N105W TO 18N106W TO 17N109W TO 13N110W
TO 12N108W TO 13N105W TO 17N105W WINDS 30 TO 40 KT. SEAS 12 TO 
20 FT. ELSEWHERE WITHIN 16N98W TO 20N106W TO 18N110W TO 12N106W
TO 05N112W TO 07N102W TO 16N98W...INCLUDING NEAR CABO 
CORRIENTES...WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 

.SYNOPSIS AND FORECAST.

.18 HOUR FORECAST WITHIN 11N86W TO 11N87W TO 10N87W TO 10N86W TO
11N86W...INCLUDING THE GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.36 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT. 

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

CONVECTION VALID AT 2130 UTC TUE AUG 15...

.HURCN FERNANDA...NUMEROUS MODERATE SCATTERED STRONG WITHIN 90 
NM IN THE CENTER.

.LOW PRES NEAR 10N99W...SCATTERED MODERATE ISOLATED STRONG FROM 
06N TO 14N BETWEEN 98W AND 106W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 10N86W TO 10N110W...AND FROM 12N124W
TO 09N133W. ITCZ EXTENDS FROM 09N133W TO BEYOND 11N140W. SCATTERED
MODERATE FROM 07N TO 18N BETWEEN 108W AND 125W. 

$$
.FORECASTER AREINHART. NATIONAL HURRICANE CENTER.