000
FZPN03 KNHC 312123
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC MON JUL 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

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 JUL 31.
24 HOUR FORECAST VALID 1800 UTC TUE AUG 01.
48 HOUR FORECAST VALID 1800 UTC WED AUG 02.

.WARNINGS.

...TROPICAL STORM WARNING...

.TROPICAL STORM IRWIN NEAR 22.7N 127.7W 1006 MB AT 2100 UTC JUL 
31 MOVING NNW OR 335 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 40 KT 
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM E 
SEMICIRCLE AND 30 NM W SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
60 NM E SEMICIRCLE AND 45 NM W SEMICIRCLE WITH SEAS TO 16 FT. 
ELSEWHERE WITHIN 120 NM SE AND 90 NM NW SEMICIRCLES WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA FROM 20N TO 24N 
BETWEEN 125W AND 129W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
MIXED SWELL.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 26.1N 
129.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 120 NM 
NE AND 60 NM SW SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW IRWIN NEAR 28.5N 
132.1W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. WINDS 20 KT 
OR LESS. SEAS LESS THAN 8 FT.
.72 HOUR FORECAST...DISSIPATED.

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.

.LOW PRES...REMNANTS OF HILARY...NEAR 27N131W 1011 MB. WITHIN 120
NM N SEMICIRCLE WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. ELSEWHERE 
WITHIN 180 NM NE AND 150 NM SW SEMICIRCLES WINDS 20 KT OR LESS. 
SEAS 8 TO 10 FT IN MIXED SWELL.
.12 HOUR FORECAST LOW PRES...REMNANTS OF HILARY...NEAR 28N133W 
1012 MB. WITHIN 120 NM NW SEMICIRCLES WINDS 20 KT OR LESS. SEAS 
8 TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST LOW PRES...REMNANTS OF HILARY...NEAR 28N134W. 
WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.S OF LINE FROM 07N80W TO 07N93W TO 03N125W TO 00N132W...EXCEPT 
LEE OF GALAPAGOS ISLANDS...WINDS 20 KT OR LESS. SEAS 8 TO 9 FT 
IN MIXED SW AND NW SWELL.
.24 HOUR FORECAST FROM 04N TO 08N BETWEEN 94W AND 111W AND S OF 
LINE FROM 03.4S110W TO 03N115W TO 03N131W TO 00N134W WINDS 20 KT 
OR LESS. SEAS 8 FT IN MIXED S AND NW SWELL.
.36 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.24 HOUR FORECAST LOW PRES NEAR 10N92W 1010 MB. WITHIN 180 NM NE 
SEMICIRCLE WINDS 20 KT OR LESS. SEAS 8 FT PRIMARILY IN SW SWELL.
.48 HOUR FORECAST LOW PRES NEAR 11N98W 1008 MB. WITHIN 270 NM NE 
SEMICIRCLE WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.

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

CONVECTION VALID AT 2100 UTC MON JUL 31...

.TROPICAL STORM IRWIN...SCATTERED MODERATE WITHIN 60 NM NE
SEMICIRCLE.

.TROPICAL WAVE FROM 06N91W TO LOW PRES 1010 MB NEAR 09N91W TO 
15N91W...SCATTERED MODERATE ISOLATED STRONG FROM 05N TO 13N 
BETWEEN 86W AND 93W.

.TROPICAL WAVE FROM 09N96W TO 18N96W...SCATTERED MODERATE 
ISOLATED STRONG FROM 05N TO 08N BETWEEN 93W AND 100W AND FROM 
13N TO 15N BETWEEN 96W AND 100W.

.TROPICAL WAVE FROM 09N110W TO 19N109W...SCATTERED MODERATE FROM 
10N TO 13N BETWEEN 108W AND 112W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N84W TO LOW PRES 1010 MB NEAR 09N91W TO 
10N115W. ITCZ CONTINUES FROM 10N115W TO 07N129W...THEN RESUMES 
FROM 13N128W TO BEYOND 10N140W. OTHER THAN CONVECTION ASSOCIATED 
WITH TROPICAL WAVES...NO SIGNIFICANT CONVECTION.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.