428 
FZPN03 KNHC 200420
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC SUN AUG 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SUN AUG 20.
24 HOUR FORECAST VALID 0000 UTC MON AUG 21.
48 HOUR FORECAST VALID 0000 UTC TUE AUG 22.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE HILARY NEAR 25.3N 114.6W 968 MB AT 0300 UTC AUG 20
MOVING NNW OR 345 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 80 KT
GUSTS 100 KT. TROPICAL STORM FORCE WINDS WITHIN 230 NM NE
QUADRANT...200 NM SE QUADRANT...120 NM SW QUADRANT...AND 170 NM
NW QUADRANT.  SEAS 12 FT OR GREATER WITHIN 270 NM N
SEMICIRCLE...420 NM SE QUADRANT AND 360 NM SW QUADRANT WITH SEAS
TO 42 FT. ELSEWHERE WITHIN 28N111W TO 28N115W TO 26N118W TO 20N117W TO 20N110W TO
22N107W TO 28N111W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER
OF AREA WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HILARY INLAND N OF THE AREA NEAR
33.6N 117.2W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. 
TROPICAL STORM FORCE WINDS WITHIN 180 NM E SEMICIRCLE AND 90 NM W
SEMICIRCLE. WITHIN 31N113W TO 32N115W TO 30N115W TO 29N114W TO 
30N113W TO 31N113W...INCLUDING THE GULF OF CALIFORNIA S TO SW
WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. ELSEWHERE WITHIN 32N115W TO 
30N137W TO 14N136W TO 07N122W TO 08N111W TO 17N105W TO 32N115W
WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.36 HOUR FORECAST POST-TROPICAL HILARY NEAR 39.5N 118.3W. 
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 45 KT.
.48 HOUR FORECAST...DISSIPATED. WITHIN 30N127W TO 30N140W TO 27N140W TO
26N135W TO 28N131W TO 30N127W WINDS 20 KT OR LESS. SEAS 8 FT IN
E TO SE SWELL.

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 00N109W TO 00N116W TO 00N118W TO 03.4S119W TO 03.4S105W
TO 00N109W WINDS 20 KT OR LESS. SEAS 8 FT IN SW SWELL.
.24 HOUR FORECAST WITHIN 02S110W TO 01S116W TO 02S120W TO
03.4S120W TO 03.4S109W TO 02S110W WINDS 20 KT OR LESS. SEAS 8 FT
IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 02S104W TO 00N110W TO 00N117W TO
02S120W TO 03.4S120W TO 03.4S102W TO 02S104W WINDS 20 KT OR
LESS. SEAS 8 FT IN S TO SW SWELL.

.18 HOUR FORECAST WITHIN 05N90W TO 07N93W TO 06N98W TO 04N99W TO
03N94W TO 04N89W TO 05N90W WINDS 20 KT OR LESS. SEAS 8 FT IN W
SWELL.
.24 HOUR FORECAST WITHIN 05N88W TO 07N92W TO 07N96W TO 06N101W
TO 03N101W TO 04N89W TO 05N88W WINDS 20 KT OR LESS. SEAS 8 FT IN
SW TO W SWELL.
.48 HOUR FORECAST WITHIN 07N84W TO 08N107W TO 03N105W TO 02N98W
TO 03N84W TO 07N84W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN SW
SWELL.

.24 HOUR FORECAST WITHIN 16N94W TO 16N96W TO 15N95W TO 13N96W TO
13N95W TO 14N94W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC... N WINDS 20 TO 25 KT. SEAS TO 8 FT. 
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0600 UTC SUN AUG 20...

HURRICANE HILARY...SCATTERED MODERATE TO STRONG N OF 23N AND 
EAST OF 119W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS FROM 09N85W TO 09N105W AND FROM 11N121W TO 
08N140W. SCATTERED MODERATE TO ISOLATED STRONG FROM 12N TO 18N 
AND FROM 109W AND 117W AND ALSO FROM 06N TO 10N AND FROM 125W AND
131W.

$$
.FORECASTER DELGADO. NATIONAL HURRICANE CENTER.