Headline:
Flood Watch issued May 15 at 2:17PM HST until May 16 at 6:00AM HST by NWS Honolulu HI
Event:
Flood Watch
Urgency:
Future
Effective:
May 15, 2026 - 5:17pm
Expires:
May 16, 2026 - 9:00am
Description:
...FLOOD WATCH CANCELLED FOR KAUAI AND NIIHAU...
...FLOOD WATCH HAS BEEN ISSUED FOR BIG ISLAND THROUGH 6 AM HST...
...FLOOD WATCH HAS BEEN EXTENDED FOR OAHU, MOLOKAI, LANAI, AND MAUI
THROUGH 6 AM HST...
* WHAT...Flash flooding caused by excessive rainfall has already
occurred and continues to be possible through tonight.
* WHERE...Oahu, Maui, Molokai, Lanai, and Kahoolawe.
* WHEN...Through 6 AM HST Saturday morning.
* 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...
- An upper level low and associated surface boundary will
provide conditions favorable for heavy rain through tonight.
Heavy rain has already been observed over portions of the
watch area, and conditions will not change much overnight.
Therefore, the watch is being extended in time.
Instruction:
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
Area Description:
Waianae Coast; Oahu North Shore; Olomana; Central Oahu; Waianae Mountains; Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Haleakala 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
Forcast Office:
NWS Honolulu HI
Sender:
w-nws.webmaster@noaa.gov