April Severe Weather

Flood Watch

Flood Watch National Weather Service Honolulu HI issued 307 AM HST Sat Apr 11 2026

…FLOOD WATCH NOW IN EFFECT FOR ALL HAWAIIAN ISLANDS THROUGH 6 PM HST MONDAY…

For: Niihau-Kauai Southwest-Kauai Mountains-Kauai North-Kauai East- Kauai South-Waianae Coast-Oahu North Shore-Olomana-Central Oahu-Waianae Mountains-Lanai Mauka-Kahoolawe-Maui Windward West-Maui Leeward West-Haleakala Summit-Kona-Kohala-Big Island Interior-Big Island Summits-East Honolulu-Honolulu Metro-Ewa Plain-Koolau Windward- Koolau Leeward-Molokai Windward-Molokai Southeast-Molokai North- Molokai West-Molokai Leeward South-Lanai Windward-Lanai Leeward- Lanai South-Maui Central Valley North-Maui Central Valley South- Windward Haleakala-Kipahulu-South Maui/Upcountry-South Haleakala- Big Island South-Big Island Southeast-Big Island East-Big Island North-

307 AM HST Sat Apr 11 2026
* WHAT…Flash flooding caused by excessive rainfall remains possible.

* WHERE…Niihau, Kauai, Oahu, Maui, Molokai, Lanai, Kahoolawe, and the Big Island.

* WHEN…For the Big Island, now through Monday afternoon. Elsewhere, from late tonight through Monday afternoon.

* IMPACTS…Significant flooding may occur due to the overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain.

* ADDITIONAL DETAILS… – A disturbance approaching from the northwest is expected to renew deep tropical moisture across all Hawaiian Islands beginning late tonight. Given saturated soils and elevated stream levels following recent heavy rainfall, flooding may redevelop quickly.

* PRECAUTIONARY/PREPAREDNESS ACTIONS… You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Info: WWA Summary for All Issued by HFO