High Seas Forecast
Issued by NWS

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000
FZPN40 PHFO 192245
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON FEB 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC FEB 19 2018.
24 HOUR FORECAST VALID 1800 UTC FEB 20 2018.
48 HOUR FORECAST VALID 1800 UTC FEB 21 2018.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.FRONT FROM 30N175E TO 25N169E TO 20N160E MOVING E 15 KT. ISOLATED
MODERATE TSTMS WITHIN 90 NM OF FRONT N OF 26N.
.24 HOUR FORECAST FRONT FROM 30N178W TO 27N177W TO 24N179W TO
19N160E. WINDS 20 TO 25 KT N OF 28N BETWEEN 176W AND 180W.
.48 HOUR FORECAST FRONT WEAKENED TO A TROUGH FROM 30N178W TO
25N177W. WINDS DIMINISHED TO 20 KT OR LESS.

.TROUGH FROM 30N159W TO 25N158W TO 19N155W MOVING W SLOWLY. E TO SE
WINDS 20 TO 30 KT E OF A LINE FROM 11N146W TO 26N157W TO 30N157W.
SCATTERED MODERATE TSTMS FROM 17N TO 24N BETWEEN 146W AND 154W...AND
ELSEWHERE WITHIN 150 NM OF TROUGH N OF 24N.
.24 HOUR FORECAST NEW LOW 27N160W 1012 MB. TROUGH FROM 30N161W TO
LOW TO 23N160W. WINDS 20 TO 30 KT E OF A LINE FROM 12N147W TO
27N157W...AND N OF 27N E OF 161W.
.48 HOUR FORECAST LOW 30N164W 1015 MB. TROUGH FROM LOW TO 25N161W
TO 21N154W. E WINDS 20 TO 25 KT E OF 148W BETWEEN 11N AND 20N. SE TO
E WINDS 20 TO 30 KT E OF A LINE FROM 20N154W TO 30N159W.

.TROUGH FROM 03N160E TO 01N166E NEARLY STATIONARY. SCATTERED
MODERATE TO STRONG TSTMS S OF 10N W OF 180E.
.24 HOUR FORECAST TROUGH DISSIPATED.

.RIDGE FROM 30N173W TO 26N176W TO 23N175E NEARLY STATIONARY AND
ERODING FROM W.

.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.

.SEAS 12 TO 17 FT N OF A LINE FROM 30N177W TO 26N178E TO 22N171E TO
24N160E. SEAS 8 TO 12 ELSEWHERE N OF A LINE FROM 30N175W TO 26N179W
TO 19N170E TO 16N160E. SEAS 8 TO 10 FT E OF A LINE FROM 09N147W TO
14N148W TO 24N157W...AND N OF 24N BETWEEN 143W AND 163W. SEAS 8 TO 9
FT FROM 17N TO 24N BETWEEN 166W AND 174W.
.24 HOUR FORECAST SEAS 12 TO 15 FT FROM 27N TO 30N BETWEEN 154W AND
159W. SEAS 12 TO 14 FT N OF A LINE FROM 29N177W TO 29N177E TO
26N172E TO 26N167E. SEAS 8 TO 12 FT ELSEWHERE N OF A LINE FROM
09N140W TO 09N148W TO 26N160W TO 26N164W TO 18N170W TO 11N174W TO
09N160E.
.48 HOUR FORECAST SEAS 8 TO 12 FT N OF A LINE FROM 10N140W TO
12N149W TO 20N154W TO 22N160W TO 10N174W TO 09N175E. SEAS 8 TO 10 FT
IN AREA BOUNDED BY 30N175E 09N175E 11N162E 07N160E 16N160E 20N167E
30N175E.

.SEAS 8 FT OR LESS OVER REMAINDER OF FORECAST AREA.

.ITCZ FROM 07N140W TO 08N158W TO 09N164W TO 08N169W. ISOLATED
MODERATE TSTMS FROM 05N TO 15N E OF 165W.

$$

.HONOLULU HI.


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