Headline:
Flash Flood Warning issued September 6 at 4:37PM HST until September 6 at 5:30PM HST by NWS Honolulu HI
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
September 6, 2026 - 7:37pm
Expires:
September 6, 2026 - 8:30pm
Description:
At 437 PM HST, Doppler radar indicated that moderate to locally heavy
showers have diminished over the Koolau Mountains and portions of
windward Oahu, with the heaviest rain falling at a rate of up to 1
inch per hour. Water levels in the Waiahole and Waikane Streams have
declined considerably, though Oahu Department of Emergency Management
recently reported that Kamehameha Highway remains closed at Waikane
and Waiahole.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Honolulu, Kahaluu, Waiahole, Ahuimanu, Waikane, Kaneohe, Kaaawa,
Aiea, Kaneohe Marine Base, Halawa, Moanalua and Pearl City.
Instruction:
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Area Description:
Oahu in Honolulu, HI
Forcast Office:
NWS Honolulu HI
Sender:
w-nws.webmaster@noaa.gov