National Weather Service United States Department of Commerce


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FZHW60 PHFO 192152
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
1152 AM HST Tue Jan 19 2021

Hawaiian offshore waters beyond 40 nautical miles out to 240
nautical miles including the portion of the Papahanaumokuakea
Marine National Monument east of French Frigate Shoals

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.

PHZ105-200430-
1152 AM HST Tue Jan 19 2021

.Synopsis for the Hawaiian offshore waters...
A surface trough over the central waters will move W through tonight
then dissipate Wednesday. Surface high pressure will build far NNE
of the area from mid-week into this weekend.

$$

PHZ180-200430-
Hawaiian Offshore Waters-
1152 AM HST Tue Jan 19 2021

.THIS AFTERNOON...Trough from 25N155W to 18N161W. W of trough, NE
winds 25 to 30 kt, and seas 10 to 14 ft. E of trough, E to SE winds
10 to 20 kt, and seas 8 to 11 ft. Scattered thunderstorms.
.TONIGHT...Trough from 25N157W to 19N163W. W of trough, NE winds 20
to 25 kt, and seas 10 to 12 ft. E of trough, E winds 10 to 15 kt,
and seas 8 to 10 ft. Scattered thunderstorms.
.WEDNESDAY THROUGH THURSDAY...Trough dissipated. E winds 10 to 20
kt. Seas 6 to 10 ft, lowering to 6 to 8 ft Wednesday night and
Thursday. Isolated thunderstorms SW waters.
.FRIDAY...E winds 15 to 25 kt. Seas 7 to 13 ft, highest NW waters.
Isolated thunderstorms SE Waters.
.SATURDAY...E to SE winds 20 to 30 kt. Seas 9 to 14 ft, highest N
waters.

$$