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The Honolulu Advertiser
Posted on: Friday, November 13, 2009

Heavy but isolated rains cause some flooding in Islands


Advertiser Staff

Hawaii news photo - The Honolulu Advertiser

A house in Hauula hangs precariously after water from Kaipapau Stream undercut its foundation. A resident says an earlier flood destroyed a retaining wall between the house and stream.

BRUCE ASATO | The Honolulu Advertiser

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Heavy rain fell in isolated areas of Hawaii overnight and some flooding was reported early today.

A flash-flood warning — meaning the threat of flooding is imminent — was posted for windward and some north shore areas of Kauai and Oahu early this morning but was lifted shortly after 8.
A statewide flash-flood watch remains in effect until this afternoon.
No instances of major flooding were reported through mid-morning, although one house in Hauula appears to be danger of toppling after its foundation was undercut by an overflowing stream.
Shon Kaanaana lives in an apartment attached to a carport at his sister's home near Kaipapau Stream.
Kaanaana said flooding last December destroyed a retaining wall that protected his sister's house from the stream.
This morning, an edge of the house hung over the stream after water had washed away portions of the stream's bank.
The National Weather Service issued the flood warning for Oahu when stream gages in both Punaluu and Kahana streams showed rapid rises in water level.
On Kauai, a rain gage in Kapaa reported rainfall in excess of 6 inches per hour at 3:30 this morning.
By 6 this morning, heavy rain over the Koolaus had diminished and by mid-morning stream levels were returning to normal.
Honolulu police reported water crossing Kamehameha Highway at Waikane Bridge early this morning but it wasn't enough to halt traffic.
Debris also was reported slowing the flow of water at Punaluu Bridge.
Teri Maneha, who lives on Pokiwai Way in Haaula, said a stream in her backyard had overflowed and water was a foot deep in her yard.
Maneha said heavy rain began to fall about 2 or 3 this morning.
Windward areas of the Big Island were being monitored this morning, with radar showing nearly stationary rain.
A flood advisory was issued for areas including Laupahoehoe, Hilo, Pahoa, Pepeekeo, Papaikou, Paauilo, Ookala, Honomu, Honokaa and Hakalau.
Meanwhile, a statewide high-surf advisory is in effect as a short period north-northwest swell continues to roll in.
The swell, which has been driving 12- to 18-foot surf, is expected to turn east-northeast later today but still will keep wave heights elevated through the weekend.
As for today, the weather service is forecasting breezy conditions — trade wind gusts could hit 28 mph — with occasional showers and thunderstorms.
Jeff Powell, a lead forecaster at the National Weather Service, says returning trade winds will bring low level moisture across the state even as unstable conditions remain high above.
"Trade winds are returning, but unsettled weather continues with locally heavy rains and thunderstorms possible through tonight," the weather service's forecast discussion says.
"Strong trade winds will arrive today, then are expected to last through the weekend, along with above average rainfall. Rainfall will taper off a bit early next week, but will still likely remain higher than average."