High Seas Forecast
Issued by NWS

Home | 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
000
FZPN40 PHFO 210019 CCA
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC THU JUL 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC JUL 20 2017.
24 HOUR FORECAST VALID 1800 UTC JUL 21 2017.
48 HOUR FORECAST VALID 1800 UTC JUL 22 2017.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM FERNANDA JUST E OF AREA 18.1N 139.9W MOVING W 11
KT. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM
FORCE WINDS WITHIN 80 NM NE... 60 NM SE...50 NM SW AND 70 NM NW
QUADRANTS. SEAS 12 FT OR GREATER WITHIN 120 NM NW AND SE
QUADRANTS...150 NM NE AND 90 NM SW QUADRANTS WITH SEAS TO 19 FT.
ELSEWHERE E OF LINE 18N140W 17N143W 20N147W 25N145W 24N140W WINDS
20 TO 33 KT. SEAS 8 TO 12 FT E OF LINE 12N140W 20N152W 27N140W.
.24 HOUR FORECAST TROPICAL DEPRESSION FERNANDA 19.0N 143.7W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS 12 FT OR GREATER
WITHIN 120 NM OF CENTER WITH SEAS TO 18 FT. SEAS 8 TO 12 FT
ELSEWHERE BOUNDED BY 26N145W 22N140W 12N148W 18N157W 26N145W.
.48 HOUR FORECAST POST TROPICAL REMNANT LOW FERNANDA NEAR 20
147W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. SEAS 12 TO 16 FT
FROM 24N TO 20N BETWEEN 144W AND 148W...SEAS 8 TO 12 FT ELSEWHERE
BOUNDED BY 27N147W 24N142W 18N152W 22N153W 27N147W.


FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

...GALE WARNING...
.LOW 25N177E 1010 MB MOVING NNW 15 KT. TROUGH FROM LOW TO 20N175E
19N171W. WINDS 30 TO 40 KT WITHIN 240 NM OF CENTER N QUADRANT.
WINDS 20 TO 30 KT ELSEWHERE N OF LINE 30N175W 22N179E 30N171E.
SEAS 12 TO 17 FT N OF 23N BETWEEN 178W AND 172E...SEAS 8 TO 12 FT
ELSEWHERE N OF LINE 30N172W 20N170E 17N160E. SCATTERED MODERATE
TO STRONG TSTMS BOUNDED BY 30N180W 27N174W 22N178E 26N174E
30N180W.
.24 HOUR FORECAST LOW 28N174E 1003 MB. TROUGH FROM LOW TO
22N173E. WINDS 30 TO 40 KT N OF 28N BETWEEN 178E AND 172E...WINDS
20 TO 30 KT ELSEWHERE N OF LINE 30N180W 25N178E 30N168E. SEAS 12
TO 15 FT N OF 27N BETWEEN 180W AND 170W...SEAS 8 TO 12 FT
ELSEWHERE N OF LINE 30N177W 26N180W 22N170E 17N160E.
.48 HOUR FORECAST LOW MOVED N OF AREA. WINDS 30 TO 40KT N OF LINE
30N171E 28N168E 30N167E...WINDS 20 TO 30 KT ELWRKSEWHERE N OF LINE
30N172E 27N167E 28N165E 30N167E.

.SYNOPSIS AND FORECAST.

.ITCZ 10N140W 06N160W 06N180W 03N168E. SCATTERED MODERATE TO
STRONG TSTMS WITHIN 150 NM OF ITCZ W OF 178W.

.WINDS NE 20 TO 25 KT FROM 14N TO 09N BETWEEN 152W AND 163W. WINDS
SE 20 TO 30 KT NW OF LINE 30N164E 28N165E 25N160E.
.24 HOUR FORECAST WINDS DIMINISHED TO 20 KT OR LESS.

.SEAS 8 TO 9 FT FROM 14N TO 09N BETWEEN 155W AND 165W.
.24 HOUR FORECAST SEAS 8 FT FROM 12N TO 06N BETWEEN 160W AND
170E. .48 HOUR FORECAST WINDS DIMINISHED TO LESS THAN 8 FT.

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

$$
.HONOLULU FORECASTER.



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