Flash Flood in Honolulu County, Hawaii

Flash Flood May 15, 2026 · Honolulu County, Hawaii

$100K

Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Heavy rainfall associated with thunderstorms developed over Oahu. This led to flash flooding and multiple roads were closed. Water flooded a residence in Royal Kunia. Flooding was reported on Farrington Highway in Waipahu, Kamehameha Highway near the Waikane Stream, and Waiahole Valley Road.

The wider storm

A cold upper level low approached the Hawaiian islands and led to thunderstorms and flooding.

Began near Mokuleia (21.6105, -158.3028).

Source: NOAA Storm Events Database, event 1324502. Narratives are written by the National Weather Service forecast office that issued the report.

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