000
FZPN03 KNHC 282156
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC MON AUG 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MON AUG 28.
24 HOUR FORECAST VALID 1800 UTC TUE AUG 29.
48 HOUR FORECAST VALID 1800 UTC WED AUG 30.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IRWIN NEAR 18.6N 124.2W 997 MB AT 2100 UTC AUG
28 MOVING WNW OR 300 DEG AT 9 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 20N120W TO 22N123W TO 21N127W TO 17N125W TO 16N124W TO
17N121W TO 20N120W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER 
OF AREA WITHIN 22N120W TO 23N124W TO 21N128W TO 17N127W TO 15N122W 
TO 17N119W TO 22N120W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 
IN MIXED SWELL.
.12 HOUR FORECAST TROPICAL DEPRESSION IRWIN NEAR 19.0N 126.3W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.24 HOUR FORECAST TROPICAL DEPRESSION IRWIN NEAR 19.0N 129.0W. 
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS 12 FT OR GREATER 
WITHIN 45 NM N SEMICIRCLE WITH SEAS TO 13 FT. WITHIN 27N131W TO 
26N135W TO 20N134W TO 19N131W TO 21N127W TO 27N131W WINDS 20 TO 
30 KT. SEAS 10 TO 12 FT. ELSEWHERE WITHIN 24N124W TO 25N128W TO 
20N134W TO 17N132W TO 17N128W TO 20N125W TO 24N124W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 19.0N 
134.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 22N132W
TO 25N136W TO 25N138W TO 21N139W TO 19N137W TO 20N132W TO 
22N132W WINDS 20 TO 30 KT. SEAS 10 TO 12 FT. ELSEWHERE WITHIN 
25N132W TO 27N135W TO 26N140W TO 17N140W TO 16N135W TO 19N132W TO
25N132W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 19.2N
137.7W. 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 19.3N
140.2W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 19.2N
142.4W. 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.

.18 HOUR FORECAST WITHIN 30N120W TO 30N123W TO 29N123W TO
29N122W TO 29N121W TO 30N120W WINDS 20 KT OR LESS. SEAS 8 TO 9
FT IN N SWELL.
.24 HOUR FORECAST WITHIN 30N120W TO 30N124W TO 29N124W TO
28N123W TO 29N121W TO 30N120W WINDS 20 KT OR LESS. SEAS 8 TO 9
FT IN N SWELL.
.48 HOUR FORECAST WITHIN 30N120W TO 30N128W TO 27N126W TO
27N122W TO 30N120W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NE 
SWELL.

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

CONVECTION VALID AT 2100 UTC MON AUG 28...

.T.S. IRWIN...SCATTERED MODERATE FROM 13N TO 22N BETWEEN 118W 
AND 126W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 12N86W TO 18N114W...THEN RESUMES S OF IRWIN 
NEAR 14N122W TO 07N137W. ITCZ FROM THAT POINT TO BEYOND 07N140W.
SCATTERED SHOWERS N OF 05N AND E OF 111W. SCATTERED MODERATE  
WITHIN 200 NM S OF ITCZ.

$$
.FORECASTER ERA. NATIONAL HURRICANE CENTER.