Hawaii Severe Flood Watch | Effective 08/13/2026 19:53

Headline: 
Flood Watch issued August 13 at 4:53PM HST until August 16 at 6:00AM HST by NWS Honolulu HI
Event: 
Flood Watch
Urgency: 
Future
Effective: 
August 13, 2026 - 7:53pm
Expires: 
August 14, 2026 - 9:15am
Description: 
Lala will bring heavy rain to the Big Island and Maui beginning Friday evening and extending through Sunday. * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Maui and The Big Island. * WHEN...From Friday evening through late Saturday night. * 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... - Lala will bring heavy rain to the state, especially Big Island and Maui, beginning Friday evening and likely extending through Saturday night. At this time, amounts of 10 to 15 inches are possible over upslope/windward areas of Big Island, with 8 to 12 inches over upslope/windward areas of Maui. Higher localized amounts are possible, up to 25 inches on Big Island and up to 15 inches on Maui.
Instruction: 
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Area Description: 
Maui Windward West; Maui Leeward West; Haleakala Summit; Kona; Kohala; Big Island Interior; Big Island Summit; 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
Forcast Office: 
NWS Honolulu HI
Sender: 
w-nws.webmaster@noaa.gov