000
FZPN03 KNHC 290407
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC TUE AUG 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE AUG 29.
24 HOUR FORECAST VALID 0000 UTC WED AUG 30.
48 HOUR FORECAST VALID 0000 UTC THU AUG 31.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IRWIN NEAR 19.3N 125.7W 999 MB AT 0300 UTC AUG 
29 MOVING WNW OR 290 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM OF CENTER 
EXCEPT 120 NM NE QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N 
SEMICIRCLE AND 0 NM S SEMICIRCLE WITH SEAS TO 15 FT. ELSEWHERE 
WITHIN 180 NM NE QUADRANT...240 SE QUADRANT...90 NM SW QUADRANT 
AND 420 NM NW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM IRWIN NEAR 19.2N 130.7W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. LITTLE CHANGE IN 
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER 
WITH SEAS TO 15 FT. ELSEWHERE WITHIN 180 NM E SEMICIRCLE...90 NM 
SW QUADRANT AND 480 NM NW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 
12 FT.
.36 HOUR FORECAST TROPICAL DEPRESSION IRWIN NEAR 19.1N 133.2W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 120 NM NE 
QUADRANT...60 NM S SEMICIRCLE AND 420 NM NW QUADRANT WINDS 
20 TO 30 KT. SEAS 8 TO 12 FT...EXCEPT 9 TO 14 FT FROM 17N TO 21N 
BETWEEN 134W AND 136W. REMAINDER OF THE AREA FROM 12N TO 28N W 
OF 129W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL DEPRESSION IRWIN NEAR 19.1N 135.4W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. FROM 18N TO 26N W OF 
133W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT...EXCEPT 9 TO 14 
FT FROM 18N TO 22N BETWEEN 135W AND 139W. REMAINDER OF THE AREA 
FROM 09N TO 28N W OF 131W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
IN MIXED SWELL.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 19.4N 
138.5W. 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 IRWIN NEAR 19.6N 
140.8W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 19.6N 
143.0W. 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.

.SYNOPSIS AND FORECAST.

.12 HOUR FORECAST N OF 28N BETWEEN 120W AND 124W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N SWELL.
.24 HOUR FORECAST N OF 27N BETWEEN 119W AND 125W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N SWELL.
.48 HOUR FORECAST N OF 27N BETWEEN 119W AND 129W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N SWELL.  

.S OF 08N BETWEEN 120W AND 136W AND ALSO S OF A LINE FROM 
05N120W TO 02S111W TO 03.4S104W WINDS 20 KT OR LESS. SEAS 8 TO 9 
FT IN S SWELL.
.24 HOUR FORECAST S OF 10N BETWEEN 130W AND 140W AND ALSO S OF A 
LINE FROM 07N130W TO 03N120W TO 03N107W TO 02N100W TO 03.4S90W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN S SWELL.  
.48 HOUR FORECAST S OF 09N BETWEEN 130W AND 140W AND ALSO S OF A 
LINE FROM 00N130W TO 07N115W TO 06N100W TO 02S91W TO 01N88W TO 
00N82W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN S SWELL. 

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

CONVECTION VALID AT 0345 UTC TUE AUG 29...

.TROPICAL STORM IRWIN...SCATTERED MODERATE ISOLATED STRONG
WITHIN 60 NM NE AND 120 NM NW QUADRANTS.

.SCATTERED MODERATE ISOLATED WITHIN 30 NM OF 09N89W.

.SCATTERED MODERATE WITHIN 60 NM OF 16N119W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 11N86W TO 14N95W TO 15N105W TO 
18N113W. IT RESUMES S OF IRWIN NEAR 12N125W TO 08N136W. THE ITCZ 
EXTENDS FROM 08N136W TO 08N140W. SCATTERED MODERATE WITHIN 120 
NM S OF ITCZ BETWEEN 136W AND 140W.

$$
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.