HONOLULU (HawaiiNewsNow) - Update 5:50 a.m.
The National Weather Service describes last night's severe weather event on the Windward Side to Hawaii News Now as 'an unusual phenomenon.'
A cell of rain showers sat right over the Waikane and Kahana Valley areas and quickly intensified into a thunderstorm, then dumped enough rain over the region that the Waikane Stream rose seven feet in about an hour.
Forecasters say it's fairly rare for a system like this one to remain in one place for so long.
Update 11:45 p.m.
Honolulu Police say Kamehameha Highway has been reopened in Waikane.
Update 11:30 p.m.
The National Weather Service has cancelled the flash flood warning that was posted for Windward Oahu. However, at last check, Kamehameha Highway was still closed in both directions in Waikane as the Waikane Stream washes across the roadway.
Update 10:45 p.m.
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