Flash Flood — Honolulu, Hawaii

2021-03-09 to 2021-03-10 · near Kaneohe, Honolulu, Hawaii

Event narrative

Four feet of water from heavy rain flooded William Henry Road in Kaneohe in windward Oahu. A blocked drain caused the backup of water, inundating some homes in the area. Major flooding problems continued over windward portions of Oahu and the North Shore, especially around Haleiwa and Waialua. The Opaeula Stream overflowed at Haleiwa Road and caused flooding of homes in the area. Also in windward Oahu, flooding was reported along Okana Road and a partial road closure occurred on Kamehameha Highway between Wailehua Road and Waikane Store.

Wider weather episode

A slow-moving surface trough, heading east to west, and an upper disturbance triggered heavy showers and isolated thunderstorms that caused flash flooding in some instances. Damages occurred to public and private property, including roads and bridges washed out. Nine homes were destroyed, 44 suffered major damage, and 55 suffered minor damage. No significant injuries were reported.

View location on OpenStreetMap → (21.4180, -157.7938)

Source: NOAA Storm Events Database, event_id 938605. Narrative written by the NWS forecast office that issued the report.