High Seas Forecast
Issued by NWS

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FZPN40 PHFO 261039
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC WED JUL 26 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE
HIGHER THAN 10-MINUTE AVERAGE WINDS.

SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0600 UTC JUL 26 2017.
24 HOUR FORECAST VALID 0600 UTC JUL 27 2017.
48 HOUR FORECAST VALID 0600 UTC JUL 28 2017.

.WARNINGS.

...TROPICAL STORM WARNING...
.TYPHOON NORU W OF AREA 29.0N 156.9E 963 MB MOVING NW 13 KT.
MAXIMUM SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE
WINDS WITHIN 180 NM NE QUADRANT...160 NM SE QUADRANT. WINDS 20
TO 33 KT ELSEWHERE NW OF LINE 30N164E 20N160E. SEAS 12 TO 20 FT
NW OF LINE 30N165E 25N162E 16N160E...SEAS 8 TO 12 FT ELSEWHERE
N OF 20N W OF 170E.
.24 HOUR FORECAST TYPHOON NORU FAR W OF AREA. ASSOCIATED WINDS
AND SEAS MOVED W OF AREA.

SEE JTWC ADVISORY.
FORECAST WINDS AROUND TROPICAL CYCLONES SHOULD BE USED WITH
CAUTION DUE TO FORECAST UNCERTAINTY.

.SYNOPSIS AND FORECAST.

.TROPICAL DEPRESSION GREG JUST E OF AREA 17.6N 139.2W 1006 MB
MOVING NW 11 KT. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
WINDS 20 TO 30 KT FROM 21N TO 17N E OF 141W. SEAS 8 TO 10 FT E
OF LINE 20N140W 18N142W 16N140W.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW GREG 18.4N 142.3W
1011 MB. WINDS 20 TO 25 KT FROM 20N TO 18N E OF 143W. SEAS 8
TO 11 FT FROM 23N TO 18N BETWEEN 141W AND 146W.
.48 HOUR FORECAST LOW 18N 146W 1012 MB. WINDS DIMINISHED TO 20
KT OR LESS. SEAS 8 TO 9 FT FROM 22N TO 18N BETWEEN 145W AND
151W.

SEE NHC ADVISORY.
FORECAST WINDS AROUND TROPICAL CYCLONES SHOULD BE USED WITH
CAUTION DUE TO FORECAST UNCERTAINTY.

.LOW 24N174E 1008 MB MOVING NE 10 KT. TROUGH 30N177E THROUGH
LOW TO 25N160E. WINDS 20 TO 25 KT WITHIN 150 NM OF LOW E
QUADRANT.
.24 HOUR FORECAST LOW 26N175E 1010 MB. TROUGH 30N175E THROUGH
LOW TO 23N170E 27N162E. WINDS 20 TO 25 KT N OF 25N BETWEEN 178E
AND 175E. SEAS 8 TO 12 FT N OF 23N BETWEEN 180W AND 174E...SEAS
8 TO 9 FT W OF LINE 30N164E 25N164E 21N160E.
.48 HOUR FORECAST LOW MOVED N OF AREA. TROUGH 30N170E 27N160E.
WINDS 20 TO 25 KT W OF LINE 25N160E 26N163E 22N160E. SEAS 8 TO
10 FT N OF 22N W OF 170E.

.ITCZ 12N140W 07N160W 04N175W. ISOLATED MODERATE TSTMS WITHIN
150 NM OF ITCZ.

.RIDGE 20N180W 15N160E NEARLY STATIONARY.

.24 HOUR FORECAST NE WINDS 20 TO 25 KT FROM 14N TO 11N BETWEEN
160W AND 163W.
.48 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS.

.SEAS 8 TO 9 FT FROM 20N TO 10N E OF 156W.
.24 HOUR FORECAST SEAS 8 TO 9 FT FROM 16N TO 09N BETWEEN 150W
AND 165W.
.48 HOUR FORECAST SEAS 8 TO 10 FT FROM 10N TO 16N BETWEEN 151W
AND 163W...AND E OF 143W BETWEEN 17N AND 21N.

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

$$
.HONOLULU FORECASTER.



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