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National Weather Service Marine Forecast FZHW60 PHFO

FZHW60 PHFO 190930
OFFHFO

Offshore Waters Forecast for Hawaii
National Weather Service Honolulu HI
1130 PM HST Sun Apr 18 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.

PHZ105-191615-
1130 PM HST Sun Apr 18 2021

Synopsis for the Hawaiian offshore waters

Ridge north of the area will remain weak through the first half
of the week as a front approaches and enters the NW waters
Tuesday. The front will stall and diminish Wednesday through
Thursday over the N waters. Ridge will strengthen Thursday
through Friday.



PHZ180-191615-
Hawaiian Offshore Waters-
1130 PM HST Sun Apr 18 2021

REST OF TONIGHT
NW waters, SE winds 5 to 10 kt. SE waters, E
to SE winds 10 to 20 kt. Seas 5 to 7 ft.

MONDAY AND MONDAY NIGHT
NW waters, SE winds 5 to 10 kt. SE
waters, E to SE winds 10 to 20 kt. Seas 5 to 8 ft. Isolated
thunderstorms NW Monday night.

TUESDAY AND TUESDAY NIGHT
Front entering NW waters Tuesday. NW
waters, variable winds up to 10 kt. SE waters, E to SE winds 10
to 20 kt. Seas 5 to 8 ft. Isolated thunderstorms NW.

WEDNESDAY AND THURSDAY
Front dissipating N waters. S of 20N, E
winds 10 to 20 kt. Elsewhere, variable winds 5 to 15 kt. Seas 5
to 8 ft.

FRIDAY
E winds 10 to 20 kt. Seas 6 to 8 ft.