000
FZPN03 KNHC 160324
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC WED AUG 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC WED AUG 16.
24 HOUR FORECAST VALID 0000 UTC THU AUG 17.
48 HOUR FORECAST VALID 0000 UTC FRI AUG 18.

.WARNINGS.

...HURRICANE WARNING... 
.HURRICANE FERNANDA NEAR 17.3N 124.1W 975 MB AT 0300 UTC AUG 16 
MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 80 KT 
GUSTS 105 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM N 
SEMICIRCLE AND 60 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
90 NM OF CENTER EXCEPT 120 NM NE QUADRANT WITH SEAS TO 30 FT. 
ELSEWHERE WITHIN 240 NM NW AND 150 NM SE SEMICIRCLES WINDS 20 TO 
33 KT. SEAS 9 TO 12 FT. REMAINDER OF THE AREA FROM 12N TO 22N 
BETWEEN 119W AND 120W...AND FROM 09N TO 12N BETWEEN 117W AND 
124W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM FERNANDA NEAR 17.5N 128.9W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE 
WINDS WITHIN 60 NM N SEMICIRCLE AND 40 NM S SEMICIRCLE. SEAS 12 
FT OR GREATER WITHIN 120 NM N AND 90 NM S SEMICIRCLES WITH SEAS TO 
20 FT. ELSEWHERE WITHIN 180 NM N AND 120 NM S SEMICIRCLES WINDS 
20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF THE AREA FROM 12N TO 
23N BETWEEN 124W AND 133W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN 
MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 17.7N 
134.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS 12 FT OR 
GREATER WITHIN 90 NM N AND 45 NM S SEMICIRCLES WITH SEAS TO 14 
FT. ELSEWHERE WITHIN 180 NM N AND 90 NM S SEMICIRCLES WINDS 20 
TO 30 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 17.9N 
140.5W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 18.0N 
146.7W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW FERNANDA NEAR 18.1N 
152.3W. 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 11N100W 1005 MB. WITHIN 120 NM N SEMICIRCLE AND 
210 NM SE QUADRANT WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
12N104.5W 1004 MB. WITHIN 150 NM NE...120 SE AND 90 NM NW 
QUADRANTS WINDS 30 TO 40 KT. SEAS 12 TO 16 FT. ELSEWHERE WITHIN 
210 NM OF CENTER...EXCEPT 180 NM SW QUADRANT WINDS 20 TO 30 KT. 
SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
15N109W 1002 MB. WITHIN 210 NM NE...180 NM SE...120 NM SW...AND 
180 NM NW QUADRANTS WINDS 30 TO 45 KT. SEAS 12 TO 20 FT. 
ELSEWHERE WITHIN 210 NM OF CENTER...EXCEPT 270 NM NE QUADRANT 
WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 

.SYNOPSIS AND FORECAST.

.12 HOUR FORECAST FROM 09N TO 11N BETWEEN 86W AND 88W... 
INCLUDING THE GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS 
BUILDING TO 8 FT. 
.24 HOUR FORECAST FROM 10N TO 11.5N E OF 88W...INCLUDING THE 
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST FROM 10N TO 11.5N E OF 88W...INCLUDING THE 
GULF OF PAPAGAYO...NE WINDS 20 TO 30 KT. SEAS 8 FT.

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

CONVECTION VALID AT 0300 UTC WED AUG 16...

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

.LOW PRES NEAR 11N100W...SCATTERED MODERATE TO STRONG FROM 10N 
TO 14N BETWEEN 100W AND 104W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE COAST OF COSTA RICA NEAR 
09N84W TO 1005 MB LOW PRESSURE LOCATED NEAR 11N110W TO 11N115W.
THE ITCZ AXIS STRETCHES FROM 07N132W TO BEYOND 10N140W. ASIDE 
FROM THE CONVECTION ASSOCIATED WITH THE TROPICAL WAVE MENTIONED 
ABOVE, SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS NOTED 
FROM 03N TO 08N BETWEEN 80W AND 86W...AND FROM 08N TO 13N 
BETWEEN 95W AND 100W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.