Flood Watch Hawaii | Effective 03/23/2026 05:36

Headline: 
Flood Watch issued March 23 at 2:36AM HST until March 23 at 6:00PM HST by NWS Honolulu HI
Event: 
Flood Watch
Urgency: 
Future
Effective: 
March 23, 2026 - 5:36am
Expires: 
March 23, 2026 - 9:00pm
Description: 
...FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON FOR THE BIG ISLAND OF HAWAII... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...The Big Island. * WHEN...Through this afternoon. * IMPACTS...Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams due to excessive rain over saturated ground. Urban areas may receive more significant flooding and property damage due to rapid runoff. * ADDITIONAL DETAILS... - Unstable tropical moisture left from the departing kona low and troughing aloft will bring possible heavy rain and isolated thunderstorms through the afternoon hours. A large band of thunderstorms continues to approach the Big Island from the west-southwest direction, which may produce another round of heavy rainfall later today.
Instruction: 
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Area Description: 
Kona; Kohala; Big Island Interior; Big Island South; Big Island Southeast; Big Island East; Big Island North
Forcast Office: 
NWS Honolulu HI
Sender: 
w-nws.webmaster@noaa.gov