High Seas Forecast
Issued by NWS

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FZPN40 PHFO 161525
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC WED AUG 16 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC AUG 16 2017.
24 HOUR FORECAST VALID 1200 UTC AUG 17 2017.
48 HOUR FORECAST VALID 1200 UTC AUG 18 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.TROUGH FROM 13N140W TO LOW 14N145W 1007 MB TO SECOND LOW 10N148W
1008 MB TO 08N153W TO 11N161W TO 06N174W TO 07N178W. FIRST LOW
MOVING NW SLOWLY. SECOND LOW AND TROUGH NEARLY STATIONARY. WINDS 20
TO 25 KT AND SEAS 8 TO 9 FT WITHIN 90 NM OF FIRST LOW. SCATTERED
MODERATE TO STRONG TSTMS FROM 10N TO 13N E OF 148W...FROM 06N TO 09N
BETWEEN 154W AND 158W...AND FROM 04N TO 06N BETWEEN 177E AND 180E.
ISOLATED MODERATE TSTMS ELSEWHERE WITHIN 105 NM OF LOWS AND TROUGH.
.24 HOUR FORECAST TROUGH FROM 13N140W TO LOW 15N147W 1007 MB TO
SECOND LOW 13N147W 1007 MB TO 10N161W TO 12N168W TO 08N173W. WINDS
20 TO 25 KT AND SEAS 8 TO 9 FT FROM 11N TO 16N BETWEEN 145W AND
148W.
.48 HOUR FORECAST LOWS MERGED. TROUGH FROM 13N140W TO MERGED
LOW...POSSIBLE DEVELOPING TROPICAL CYCLONE....15N147W 1006 MB TO
10N151W. SECOND TROUGH FROM 12N170W TO 08N174W. WINDS 20 TO 25 KT
AND SEAS 8 TO 9 FT WITHIN 120 NM OF LOW.

.RIDGE FROM 30N175E TO 25N165E TO 22N160E MOVING N SLOWLY.

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

.ITCZ FROM 06N178E TO 05N170E TO 07N160E. ISOLATED MODERATE TSTMS
FROM 03N TO 09N W OF 165E...AND FROM 05N TO 08N BETWEEN 173E AND
179E.

$$

.FORECASTER KINEL. HONOLULU HI.



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