006 
FZPN03 KNHC 280347
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC MON AUG 28.
24 HOUR FORECAST VALID 0000 UTC TUE AUG 29.
48 HOUR FORECAST VALID 0000 UTC WED AUG 30.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IRWIN NEAR 17.4N 122.5W 997 MB AT 0300 UTC AUG 
28 MOVING WNW OR 285 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM OF CENTER 
EXCEPT 200 NM NE QUADRANT. SEAS 12 FT OR GREATER WITHIN 30 NM NW 
NW AND SE QUADRANTS...90 NM NE QUADRANT AND 0 NM SW QUADRANT 
WITH SEAS TO 15 FT. ELSEWHERE WITHIN 360 NE QUADRANT...420 SE 
QUADRANT...60 NM SW QUADRANT AND 240 NM NW QUADRANT WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM IRWIN NEAR 18.3N 126.0W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE 
WINDS WITHIN 0 NM S SEMICIRCLE...160 NM NE QUADRANT AND 50 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM NE QUADRANT...
30 NM S SEMICIRCLE AND 60 NW NW QUADRANT WITH SEAS TO 16 FT.
ELSEWHERE WITHIN 180 NM NE QUADRANT...120 NM SE QUADRANT...
60 NM SW QUADRANT AND 300 NM NW QUADRANT WINDS 20 TO 33 KT.
SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM IRWIN NEAR 18.4N 131.6W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE 
WINDS WITHIN 0 NM S SEMICIRCLE...80 NM NE QUADRANT AND 50 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM NE QUADRANT...30 NM 
S SEMICIRCLE AND 60 NW NW QUADRANT WITH SEAS TO 15 FT. ELSEWHERE 
WITHIN 120 NM OF CENTER...EXCEPT 420 NM NW QUADRANT WINDS 
20 TO 33 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST TROPICAL DEPRESSION IRWIN NEAR 18.5N 136.1W.
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 19.0N 
140.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 19.0N 
142.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 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.

.FROM 10N TO 12N W OF 138W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 
9 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.S OF 06N BETWEEN 121W AND 125W WINDS 20 KT OR LESS. SEAS 8 FT 
IN SE SWELL.
.24 HOUR S OF 09N BETWEEN 121W AND 136W WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN SE SWELL.
.48 HOUR FORECAST S OF A LINE FROM 09N139W TO 05N122W TO 03N110W 
TO 01N110W TO 03.4S93W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN S 
SWELL.

.36 HOUR FORECAST N OF 28N BETWEEN 120W AND 127W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.
.48 HOUR FORECAST N OF 27N BETWEEN 118W AND 130W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.

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

CONVECTION VALID AT 0330 UTC MON AUG 28...

.TROPICAL STORM IRWIN...NUMEROUS MODERATE ISOLATED 
STRONG FROM 15N TO 20N BETWEEN 114W AND 120W. SCATTERED
MDOERATE FROM 14N TO 18N BETWEEN 120W AND 124W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 10N85W TO 13N99W TO 16N111W. IT 
RESUMES AT 10N125W TO 08N140W. SCATTERED MODERATE FROM 04N TO 
08N BETWEEN 86W AND 97W.

$$
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.