Flood Watch

Headline

.Moisture along the eastern flank of Hurricane Lowell will bring periods of heavy rain to the main Hawaiian Islands through Tuesday.

Full Alert Message

Flood Watch National Weather Service Honolulu HI 500 PM HST Sun Sep 6 2026 .Moisture along the eastern flank of Hurricane Lowell will bring periods of heavy rain to the main Hawaiian Islands through Tuesday. ...FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY AFTERNOON... * 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.