iNWS Alert

Remnant moisture from former Tropical Storm Norbert will bring periods of moderate to heavy showers to the Hawaiian Islands tonight through Friday morning.

HIZ001-003-004-006-007-009>011-015>018-022-023-026>054-171600-
/O.NEW.PHFO.FA.A.0012.260917T0400Z-260918T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Niihau-Kauai Southwest-Kauai Mountains-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-Kauai North-
Kauai East-Kauai South-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-
341 PM HST Wed Sep 16 2026

...FLOOD WATCH IN EFFECT THROUGH 6 AM FRIDAY...

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

* WHERE...Kauai, Niihau, Maui, Lanai, Molokai, The Big Island and
Kahoolawe.

* WHEN...Through early Friday morning.

* IMPACTS...Flood prone roads and other low lying areas may be closed
due to elevated runoff and overflowing streams. Urban areas may
receive more significant flooding and property damage due to rapid
runoff.

* ADDITIONAL DETAILS...
- A band of remnant moisture from Norbert will move east across the
islands tonight into Friday, bringing moderate to locally heavy
showers. There is a slight chance of thunderstorms on Thursday as
well, which could produce briefly higher rain rates, increasing
the risk of flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

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