Headline:
Flash Flood Warning issued May 15 at 4:35PM HST until May 15 at 6:15PM HST by NWS Honolulu HI
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
May 15, 2026 - 7:35pm
Expires:
May 15, 2026 - 9:15pm
Description:
At 435 PM HST, radar indicated nearly stationary thunderstorms with
heavy rainfall redeveloping over the Koolau mountains, from upslope
of Hauula to upslope of Ahuimanu. These thunderstorms were bringing
heavy rainfall to some areas that have already had significant
rainfall today. Rain was falling at a rate of 2 to 3 inches per hour
in the heaviest downpours. Flash flooding is ongoing or expected to
begin shortly.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar.
IMPACT...Flooding in drainages, streams, rivers, roads,
properties, and other low-lying areas. Public road
closures possible in some areas. Landslides are possible
in steep terrain.
Some locations that could experience flash flooding include but are
not limited to...
Hauula, Punaluu, Kaaawa, Waikane, Kahaluu, Ahuimanu, Heeia, and
Kaneohe.
Instruction:
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Area Description:
Oahu in Honolulu, HI
Forcast Office:
NWS Honolulu HI
Sender:
w-nws.webmaster@noaa.gov