Band of thunderstorms just offshore could bring heavy rain to Oahu overnight

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A band of thunderstorms has recently developed south of Oahu and could move over the island overnight.

The bulk of the storms is located roughly three to eight miles offshore from Diamond Head to Makakilo. Another cell is located further south, roughly 18 miles away from Hawaii Kai.

Should they move over land, the rain may be enough to trigger a flood advisory or a flash flood warning that could affect the entire island.

Oahu is currently under a flood advisory until 12:15 a.m. with heavy rain over East Honolulu falling at a rate of nearly one and a half inches per hour. 

Both Nuuanu Upper and Manoa Lyon Arboretum rain gages reported over a quarter of an inch of rainfall in 15 minutes.

Locations in the advisory include but are not limited to Honolulu, Hauula, Waimanalo, Mililani, Kaneohe Marine Base, Hawaii Kai, Palolo, Kahaluu, Kaaawa, Ahuimanu, Punaluu, and Salt Lake.

Stay away from streams, drainage ditches and low lying areas prone to flooding.

Rainfall and runoff will also cause hazardous driving conditions due to ponding, reduced visibility and poor braking action.

Do not cross fast flowing or rising water in your vehicle, or on foot. Turn around, don’t drown.

Click here to view KHON2’s Interactive Radar.

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