WGHW60 PHFO 220256

FFAHFO



Flood Watch

National Weather Service Honolulu HI

456 PM HST Sat Mar 21 2026



...FLOOD WATCH CONTINUES FOR OAHU MOLOKAI MAUI LANAI KAHOOLAWE AND 

THE BIG ISLAND...



HIZ006-007-009>011-015>018-022-023-026-027-032>054-221700-

/O.CON.PHFO.FA.A.0006.000000T0000Z-260323T0400Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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-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-

456 PM HST Sat Mar 21 2026



* WHAT...Flash flooding caused by excessive rainfall is possible.



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



* WHEN...Through Sunday 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 kona low west of the islands has drawn abundant moisture

    northward. Rounds of moderate to heavy rainfall are

    anticipated. The heaviest rain is expected to last through

    tonight, except for the Big Island where the heaviest rain is

    expected Sunday.





PRECAUTIONARY/PREPAREDNESS ACTIONS...



You should monitor later forecasts and be prepared to take action 

should Flash Flood Warnings be issued.



&&



$$



VAUGHAN