High Seas Forecast
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FZPN40 PHFO 230325
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC MON OCT 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC OCT 23 2017.
24 HOUR FORECAST VALID 0000 UTC OCT 24 2017.
48 HOUR FORECAST VALID 0000 UTC OCT 25 2017.

.WARNINGS.

...GALE WARNING...
.FRONT 30N168W 27N177W 27N172E 29N167E MOVING S 20 KT. WINDS 20 TO
30 KT N OF FRONT AND WITHIN 300 NM E OF FRONT.
.24 HOUR FORECAST FRONT 30N154W 24N160W 20S170W 23N170E. WINDS 20
TO 30 KT N OF FRONT AND WITHIN 360 NM E OF FRONT N OF 24N.
.48 HOUR FORECAST FRONT 30N151W 25N152W 20S155W 17N165W 16N175W
17N175E. ASSOCIATED LOW JUST N OF AREA NEAR 31N156W. WINDS 30 TO
35 KT WITHIN 150 NM E OF FRONT N OF 25N AND N OF 28N BETWEEN 155W
AND 160W. WINDS 20 TO 30 KT ELSEWHERE WITHIN 360 NM E OF FRONT N
OF 20N AND N OF 24N BETWEEN 155W AND 166W. WINDS 20 TO 25 KT WITHIN
480 NM N OF FRONT W OF 165W.

.SYNOPSIS AND FORECAST.

.LOW 08N151W 1010 MB MOVING WNW 10 KT. TROUGH FROM LOW TO 12N157W.
ITCZ FROM LOW TO 09N140W. WINDS 20 TO 25 KT WITHIN 120 NM NE
QUADRANT OF LOW. ISOLATED MODERATE TO STRONG TSTMS WITHIN 180 NM
OF LOW AND ITCZ.
.24 HOUR FORECAST LOW 09N154W 1011 MB. TROUGH FROM LOW TO 15N159W.
WINDS DECREASED TO 20 KT OR LESS.
.48 HOUR FORECAST LOW DISSIPATED. TROUGH 17N155W 10N158W.

.TROUGH 17N162W 10N170W 08N176W NEARLY STATIONARY. ISOLATED
MODERATE TSTMS FROM 12N TO 16N BETWEEN 154W AND 170W.
.24 HOUR FORECAST TROUGH 20N160W 12N167W 09N173W.
.48 HOUR FORECAST TROUGH 16N160W 07N178W.

.TROUGH 14N160E 18N164E MOVING WNW 10 KT. WINDS 20 TO 25 KT WITHIN
180 NM SE OF TROUGH. ISOLATED MODERATE TO STRONG TSTMS WITHIN 240
NM OF TROUGH...AND FROM 12N TO 17N BETWEEN 178E AND 168E.
.24 HOUR FORECAST TROUGH MOVED W OF AREA. WINDS DECREASED TO 20 KT
OR LESS.

.RIDGE 30N141W 24N160W 23N174W MOVING SE 15 KT.

.WINDS 20 KT OR LESS REMAINDER OF FORECAST AREA.

.SEAS 9 TO 11 FT N OF 27N W OF 150W. SEAS 8 TO 9 FT ELSEWHERE N OF
07N.
.24 HOUR FORECAST SEAS 12 TO 16 FT N OF LINE 30N150W 23N165W
22N180W 23N175E. SEAS 10 TO 12 FT ELSEWHERE N OF LINE 27N140W
22N170W 23N160E. SEAS 8 FT OR LESS S OF 10N W OF 150W. SEAS 8 TO
10 FT REST OF AREA.
.48 HOUR FORECAST SEAS 12 TO 18 FT N OF LINE 30N147W 24N150W
23N165W 30N169W. SEAS 8 TO 12 FT ELSEWHERE N OF 15N. SEAS 8 TO 9
FT FROM 03N TO 15N E OF 155W.

.SEAS 8 FT OR LOWER REMAINDER OF FORECAST AREA.

$$

.FORECASTER WROE. HONOLULU HI.


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.