High Seas Forecast
Issued by NWS

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178
FZPN03 KNHC 280301
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC FRI JUL 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC FRI JUL 28.
24 HOUR FORECAST VALID 0000 UTC SAT JUL 29.
48 HOUR FORECAST VALID 0000 UTC SUN JUL 30.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM HILARY NEAR 18.3N 117.3W 992 MB AT 0300 UTC JUL
28 MOVING WNW OR 295 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 60 KT
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NW AND SE
QUADRANTS...90 NM NE QUADRANT AND 60 NM SW QUADRANT. SEAS 12 FT
OR GREATER WITHIN 150 NM E SEMICIRCLE AND 120 NM W SEMICIRCLE
WITH SEAS TO 25 FT. ELSEWHERE WITHIN 150 NM OF CENTER WINDS 20
TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA BOUNDED BY 21N125W
TO 11N118W TO 25N118W TO 19N112W TO 21N125W WINDS 20 KT OR LESS.
SEAS 8 TO 12 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HILARY NEAR 19.6N 120.0W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER.
ELSEWHERE WITHIN 150 NM OF CENTER WINDS 20 TO 33 KT. SEAS 9 TO
12 FT. REMAINDER OF AREA BOUNDED BY 23N127W TO 12N119W TO
19N114W TO 26N119W TO 23N127W WINDS 20 KT OR LESS. SEAS 8 TO 12
FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM HILARY NEAR 21.2N 124.3W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE
WINDS WITHIN 90 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 120 NM S SEMICIRCLES WITH SEAS TO 20 FT. ELSEWHERE
WITHIN 150 NM WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF
AREA BOUNDED BY 21N118W TO 18N131W TO 27N135W TO 30N125W TO
21N118W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM HILARY NEAR 22.1N 128.7W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL HILARY NEAR 23.2N 132.1W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW HILARY NEAR 24.5N
134.8W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.

...TROPICAL STORM WARNING...
.TROPICAL STORM IRWIN NEAR 14.9N 124.6W 1000 MB AT 0300 UTC JUL
28 MOVING W OR 270 DEG AT 2 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM N
SEMICIRCLE AND 50 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN
90 NM OF CENTER WITH SEAS TO 15 FT. ELSEWHERE WITHIN 120 NM OF
CENTER WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA
BOUNDED BY 21N125W TO 11N118W TO 07N127W TO 21N125W WINDS 20 KT
OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM IRWIN NEAR 14.8N 125.0W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER.
ELSEWHERE WITHIN 150 NM OF CENTER WINDS 20 TO 33 KT. SEAS 9 TO
12 FT. REMAINDER OF AREA BOUNDED BY 23N127W TO 12N119W TO
08N128W TO 19N134W TO 23N127W WINDS 20 KT OR LESS. SEAS 8 TO 12
FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM IRWIN NEAR 16.4N 124.8W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 70 NM N SEMICIRCLE...60 NM SE QUADRANT AND 50 NM SW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM OF CENTER WITH
SEAS TO 14 FT. ELSEWHERE WITHIN 150 NM OF CENTER WINDS 20 TO 33
KT. SEAS 9 TO 12 FT. REMAINDER OF AREA BOUNDED BY 21N118W TO
18N131W TO 10N127W TO 11N117W TO 21N118W WINDS 20 KT OR LESS.
SEAS 8 TO 12 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM IRWIN NEAR 20.0N 126.0W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 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.

.WITHIN 30 NM EITHER SIDE OF A LINE FROM 16N95W TO
14.5N95W...INCLUDING THE GULF OF TEHUANTEPEC...WINDS 20 KT OR
LESS. SEAS 8 FT IN SW SWELL.
.12 HOUR FORECAST GULF OF TEHUANTEPEC WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.S OF LINE FROM 02S81W TO 02N95W TO 03.4S116W...INCLUDING WATERS
BETWEEN ECUADOR AND THE GALAPAGOS ISLANDS...WINDS 20 KT OR LESS.
SEAS 8 TO 9 FT IN S TO SW SWELL.
.24 HOUR FORECAST S OF LINE FROM 05N80W TO 10N100W TO 09N108W TO
03.4S117W...INCLUDING WATERS BETWEEN ECUADOR AND THE GALAPAGOS
ISLANDS...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN S TO SW SWELL.
.48 HOUR FORECAST S OF LINE FROM 07N79W TO 12N101W TO 09N110W TO
03.4S115W...INCLUDING WATERS BETWEEN ECUADOR AND THE GALAPAGOS
ISLANDS...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN S TO SW SWELL.

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

CONVECTION VALID AT 0215 UTC FRI JUL 28...

.TROPICAL STORM HILARY...NUMEROUS MODERATE WITHIN 60 NM S
QUADRANT. SCATTERED MODERATE ELSEWHERE FROM 15N TO 20N BETWEEN
113W AND 118W.

.TROPICAL STORM IRWIN...NUMEROUS MODERATE SCATTERED STRONG
WITHIN 90 NM OF CENTER...EXCEPT NW QUADRANT.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N84W TO 08N95W TO 09N105W TO 12N110W. ITCZ
FROM 10N132W TO 07N140W. SCATTERED MODERATE ISOLATED STRONG
WITHIN 150 NM S OF TROUGH AXIS BETWEEN 88W AND 92W...WITHIN 150
NM N OF TROUGH AXIS BETWEEN 94W AND 97W. SCATTERED MODERATE FROM
08N TO 14N BETWEEN 108W AND 115W. SCATTERED MODERATE ISOLATED
STRONG FROM 07N TO 10N W OF 132W.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.



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