National Weather Service United States Department of Commerce

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FZPN40 PHFO 181533
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC WED JUL 18 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC JUL 18 2018.
24 HOUR FORECAST VALID 1200 UTC JUL 19 2018.
48 HOUR FORECAST VALID 1200 UTC JUL 20 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 16N152W TO 10N157W TO 05N169W MOVING W 15 KT. NE TO E
WINDS 20 TO 30 KT FROM 11N TO 14N E OF 146W...AND FROM 14N TO 23N
BETWEEN 148W AND 158W. SEAS 8 TO 12 FT IN AREA ENCLOSED BY 25N148W
13N140W 10N140W 12N147W 10N161W 24N153W 25N148W. ISOLATED MODERATE
TO STRONG TSTMS WITHIN 90 NM OF TROUGH S OF 10N...FROM 12N TO 16N
BETWEEN 148W AND 152W...FROM 04N TO 09N BETWEEN 149W AND 157W...AND
ELSEWHERE FROM 04N TO 11N BETWEEN 163W AND 170W.
.24 HOUR FORECAST TROUGH FROM 14N158W TO 11N160W TO 06N174W. NE TO E
WINDS 20 TO 25 KT FROM 15N TO 19N BETWEEN 155W AND 160W. SEAS 8 TO
11 FT FROM 13N TO 19N BETWEEN 149W AND 161W. SEAS 8 TO 9 FT FROM 11N
TO 14N BETWEEN 147W AND 150W.
.48 HOUR FORECAST TROUGH FROM 14N163W TO 12N164W TO 08N172W. WINDS
EASED TO 20 KT OR LESS. SEAS LOWERED TO 8 FT OR LESS.

.TROUGH FROM 30N161W TO 28N162W TO 27N163W NEARLY STATIONARY.
ISOLATED MODERATE TSTMS N OF 27N BETWEEN TROUGH AND 158W...AND
WITHIN 60 NM OF LINE FROM 29N164W TO 28N169W.
.24 HOUR FORECAST TROUGH FROM 30N161W TO 24N164W.
.48 HOUR FORECAST TROUGH FROM 30N164W TO 21N166W.

.TROUGH FROM 14N172E TO 10N172E TO 06N171E MOVING WNW 10 KT.
ISOLATED MODERATE TSTMS W OF 170E S OF 29N...FROM 02N TO 29N BETWEEN
170E AND 180E...AND S OF 27N BETWEEN 160W AND 180W.
.24 HOUR FORECAST TROUGH FROM 16N169E TO 10N166E.
.48 HOUR FORECAST TROUGH FROM 20N165E TO 16N163E.

.SE TO E WINDS 20 TO 25 KT N OF LINE FROM 29N160E TO 24N170E TO
25N175W.
.24 HOUR FORECAST SE TO E WINDS 20 TO 25 KT N OF LINE FROM 28N165E
TO 26N170E TO 25N180E.
.48 HOUR FORECAST SE TO E WINDS 20 TO 25 KT N OF LINE FROM 29N166E
TO 28N171E...AND BETWEEN 20N AND 23N W OF 162E.

.SEAS 8 TO 11 FT N OF 26N W OF 171E. SEAS 8 TO 9 FT N OF 27N BETWEEN
171E AND 177W.
.24 HOUR FORECAST SEAS 8 TO 9 FT N OF 27N BETWEEN 166E AND 178E.
.48 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LESS.

.WINDS 20 KT OR LESS AND SEAS 8 FT OR LESS REST OF FORECAST AREA.

.ITCZ FROM 10N140W TO 10N148W. ISOLATED MODERATE TSTMS FROM 05N TO
15N E OF 148W.

$$

.HONOLULU FORECAST OFFICE.


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