Hawaii Severe Flood Watch | Effective 08/16/2026 07:15

Headline: 
Flood Watch issued August 16 at 4:15AM HST until August 17 at 6:00AM HST by NWS Honolulu HI
Event: 
Flood Watch
Urgency: 
Future
Effective: 
August 16, 2026 - 7:15am
Expires: 
August 16, 2026 - 9:15pm
Description: 
Tropical Storm Lala will continue to bring heavy rain to the Big Island and Maui County through this afternoon, and bring heavy rain to Oahu, Kauai, and Niihau through late tonight. * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Kauai, Niihau, and Oahu. * WHEN...Through late tonight. * 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... - Tropical Storm Lala will bring periods of heavy rain to Kauai, Niihau, and Oahu through late tonight. Current forecast has rainfall amounts of 2 to 6 inches with local amounts up to 8 inches possible.
Instruction: 
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Area Description: 
Niihau; Kauai Southwest; Kauai Mountains; Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Kauai North; Kauai East; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Koolau Windward; Koolau Leeward
Forcast Office: 
NWS Honolulu HI
Sender: 
w-nws.webmaster@noaa.gov