000
FZPN03 KNHC 231524
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC SUN JUL 23 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1200 UTC SUN JUL 23.
24 HOUR FORECAST VALID 1200 UTC MON JUL 24.
48 HOUR FORECAST VALID 1200 UTC TUE JUL 25.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GREG NEAR 14.3N 129.0W 1001 MB AT 1500 UTC JUL 
23 MOVING W OR 270 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N 
SEMICIRCLE...0 NM SE QUADRANT AND 30 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 60 NM S SEMICIRCLE...120 NM NE QUADRANT AND 90 
NM NW QUADRANT WITH SEAS TO 18 FT. ELSEWHERE WITHIN 150 NM NW 
AND 120 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. 
FROM 17N TO 19N BETWEEN 125W AND 132W NE TO E WINDS 20 TO 25 KT. 
SEAS 8 TO 11 FT. REMAINDER AREA FROM 09N TO 23N BETWEEN 124W AND 
133W WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM GREG NEAR 14.5N 133.0W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM NE QUADRANT...0 NM SE QUADRANT...30 NM SW 
QUADRANT...AND 40 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
90 NM N AND 45 NM S SEMICIRCLES WITH SEAS TO 16 FT. ELSEWHERE 
WITHIN 120 NM NW AND 90 NM SE SEMICIRCLES WINDS 20 TO 33 KT. 
SEAS 8 TO 11 FT. FROM 17N TO 21N W OF 130W NE TO E WINDS 20 TO 
25 KT. SEAS 8 TO 11 FT. REMAINDER AREA FROM 10N TO 20N W OF 
129W...AND FROM 20N TO 25N W OF 132W WINDS 20 KT OR LESS. SEAS 
TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM GREG NEAR 15.0N 136.2W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS 
WITHIN 30 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 75 NM N AND 30 NM S SEMICIRCLES WITH SEAS TO 14 
FT. ELSEWHERE WITHIN 120 NM NW AND 75 NM SE SEMICIRCLES WINDS 20 
TO 33 KT. SEAS 8 TO 11 FT. REMAINDER AREA FROM 10N TO 20N W OF 
132W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL DEPRESSION GREG NEAR 16.1N 138.6W.
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 GREG NEAR 16.5N 
141.0W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW GREG NEAR 15.9N 
143.6W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.

...HURRICANE WARNING...
.TROPICAL STORM IRWIN NEAR 15.0N 115.8W 1004 MB AT 1500 UTC JUL 
23 MOVING W OR 280 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM OF CENTER 
EXCEPT 30 NM NE QUADRANT. SEAS 12 FT OR GREATER WITHIN 0 NM OF 
CENTER EXCEPT 30 NM NE QUADRANT WITH SEAS TO 14 FT. ELSEWHERE 
WITHIN 90 NM OF CENTER...EXCEPT 60 NM SW QUADRANT WINDS 20 TO 33 
KT. SEAS 8 TO 11 FT. 
.24 HOUR FORECAST TROPICAL STORM IRWIN NEAR 15.0N 117.5W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 30 NM OF CENTER EXCEPT 40 NM NE QUADRANT. SEAS 12 
FT OR GREATER WITHIN 60 NM OF CENTER WITH SEAS TO 18 FT. 
ELSEWHERE WITHIN 120 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 
11 FT.
.48 HOUR FORECAST HURRICANE IRWIN NEAR 15.0N 119.1W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM N SEMICIRCLE AND 50 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 90 NM N AND 60 NM S SEMICIRCLES WITH SEAS TO 22 
FT. ELSEWHERE WITHIN 150 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 
TO 11 FT.
.72 HOUR FORECAST HURRICANE IRWIN NEAR 14.8N 121.4W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM IRWIN NEAR 14.2N 123.9W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST TROPICAL STORM IRWIN NEAR 14.0N 125.4W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.

...HURRICANE WARNING...
.TROPICAL STORM HILARY NEAR 12.7N 102.3W 1003 MB AT 1500 UTC JUL 
23 MOVING WNW OR 290 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 40 KT 
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM S 
SEMICIRCLE...70 NM NE QUADRANT AND 50 NM NW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 30 NM OF CENTER EXCEPT 60 NM NE QUADRANT WITH 
SEAS TO 14 FT. ELSEWHERE WITHIN 120 NM N AND 90 NM S SEMICIRCLES 
OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST HURRICANE HILARY NEAR 13.8N 104.8W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 80 NM NE QUADRANT...50 NM SE QUADRANT...40 NM SW 
QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
90 NM N AND 60 NM S SEMICIRCLES WITH SEAS TO 22 FT. ELSEWHERE 
WITHIN 150 NM OF CENTER...EXCEPT 180 NM SE QUDARANT OF CENTER 
WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST HURRICANE HILARY NEAR 15.4N 107.9W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NE QUADRANT...70 NM SE QUADRANT...60 NM SW 
QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
150 NM N AND 90 NM S SEMICIRCLES WITH SEAS TO 28 FT. ELSEWHERE 
WITHIN 180 NM N AND 150 NM S SEMICIRCLES OF CENTER WINDS 20 TO 
33 KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST HURRICANE HILARY NEAR 16.5N 112.0W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE HILARY NEAR 17.6N 115.8W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT.
.120 HOUR FORECAST HURRICANE HILARY NEAR 19.0N 119.0W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 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.

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

CONVECTION VALID AT 1500 UTC SUN JUL 23...

.TROPICAL STORM GREG...NUMEROUS MODERATE SCATTERED STRONG 
WITHIN 90 NM OF CENTER. 

.TROPICAL STORM IRWIN...SCATTERED MODERATE ISOLATED STRONG FROM 
12N TO 15N BETWEEN 112W AND 118W. 

.TROPICAL STORM HILARY...NUMEROUS MODERATE SCATTERED STRONG IN A 
BAND WITHIN 180 NM NE SEMICIRCLE OF CENTER. SCATTERED MODERATE 
ISOLATED STRONG WITHIN 150 NM SW SEMICIRCLE OF CENTER.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH IS ANALYZED E OF THE TROPICAL CYCLONE 
ACTIVITY FROM 08N79W ACROSS WESTERN PANAMA AND COSTA RICA TO 
10N87W TO 09N92W TO 12N97W. THE ITCZ EXTENDS FROM 11N130W TO 
BEYOND 07N140W. SCATTERED MODERATE ISOLATED STRONG IS NOTED FROM 
05N TO 08N E OF 84W. A CLUSTER OF MODERATE TO STRONG CONVECTION 
IS NEAR THE WESTERN END OF THE MONSOON TROUGH FROM 09N TO 12N 
BETWEEN 95W AND 97W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.