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Weather / Flood Watch

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Flood Watch issued September 6 at 5:00PM HST until September 8 at 6:00PM HST by NWS Honolulu HI

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 Summit; 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

Urgency: Future
Certainty: Possible
Onset: 9/7/2026, 3:00:00 AM
Expires: 9/7/2026, 5:00:00 PM

Details

Moisture along the eastern flank of Hurricane Lowell will bring periods of heavy rain to the main Hawaiian Islands through Tuesday. * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Maui, Lanai, Molokai, Oahu, The Big Island and Kahoolawe. * WHEN...Through Tuesday afternoon. * 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... - Moisture along the eastern flank of Hurricane Lowell will bring periods of heavy rain to the main Hawaiian islands through Tuesday. Initially, the threat of heavy rain will be highest along windward and mountain areas, and then spread everywhere as the winds become more southerly by Monday.

What To Do

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

Other Active Flood Watch Alerts

Flood Watch issued September 7 at 3:12AM HST until September 8 at 6:00PM HST by NWS Honolulu HI
Niihau; Kauai Southwest; Kauai Mountains; Kauai North; Kauai East; Kauai South
Flood Watch issued September 7 at 3:12AM HST until September 8 at 6:00PM HST by NWS Honolulu HI
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 Summit; 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
Flood Watch issued September 7 at 6:01AM MDT until September 8 at 12:00PM MDT by NWS Great Falls MT
East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Southern Rocky Mountain Front; Southern High Plains; Eastern Pondera and Eastern Teton
Flood Watch issued September 7 at 3:59AM MDT until September 8 at 12:00PM MDT by NWS Missoula MT
West Glacier Region; Flathead/Mission Valleys; Potomac/Seeley Lake Region
Flood Watch issued September 6 at 9:51AM MDT until September 8 at 12:00PM MDT by NWS Missoula MT
West Glacier Region; Flathead/Mission Valleys; Potomac/Seeley Lake Region

Source: National Weather Service.