Headline:
Flood Watch issued September 23 at 3:44AM HST until September 26 at 6:00PM HST by NWS Honolulu HI
Event:
Flood Watch
Urgency:
Future
Effective:
September 23, 2026 - 6:44am
Expires:
September 23, 2026 - 8:45pm
Description:
An intensifying tropical cyclone is expected to bring heavy rain to
the eastern end of the state over the next few days. The exact track
of the dangerous tropical cyclone remains somewhat uncertain, but
significant heavy rain is likely over windward and southeast Big
Island.
* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.
* WHERE...Big Island, Maui, Lanai, Molokai, and Kahoolawe.
* WHEN...From noon HST today through Saturday afternoon.
* IMPACTS...Significant flooding may occur due to the overflow of
streams and drainages. Roads in several areas may be closed, along
with property damage in urban or low lying spots due to runoff.
Landslides may also occur in areas with steep terrain.
* ADDITIONAL DETAILS...
- Heavy rain on the north side of an intensifying tropical cyclone
will develop later today and tonight over Big Island and spread
to Maui. Windward and southeast Big Island and windward Maui are
the most likely to experience heavy rain, with considerable
flooding possible over portions of Big Island Friday into the
weekend. Other islands in Maui County are at risk as well.
Instruction:
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
Area Description:
Lanai Mauka; Kahoolawe; Maui Windward West; Maui Leeward West; Haleakala Summit; Kona; Kohala; Big Island Interior; Big Island Summit; 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; Big Island South; Big Island Southeast; Big Island East; Big Island North
Forcast Office:
NWS Honolulu HI
Sender:
w-nws.webmaster@noaa.gov