UPDATE: 10:30 a.m.

A flash flood warning has been issued for Oahu and is in effect through 1:30 p.m. today.

At 10:23 a.m., radar indicated heavy rain over the Koolau mountains between Kaneohe and Kahuku, according to the National Weather Service. Rain was falling at a rate of 2 to 3 inches per hour. Flash flooding is expected to begin shortly.

Locations in the warning include, but are not limited to, Ahuimanu, Waikane, Hauula, Laie, Waiahole, Kahaluu, Kahuku, Punaluu, Kaaawa, Wahiawa, Aiea and Halawa.