Headline:
Flash Flood Warning issued March 21 at 3:52AM HST until March 21 at 6:00AM HST by NWS Honolulu HI
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
March 21, 2026 - 6:52am
Expires:
March 21, 2026 - 9:00am
Description:
At 352 AM HST, radar indicated heavy rain near Punaluu. Rain was
falling at a rate of 1 to 2.5 inches per hour. 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 will experience flash flooding include...
Honolulu, Waipio, Moanalua, Halawa, Salt Lake, Aiea, Kalihi, Pearl
City, Ahuimanu, Iroquois Point, Manoa, Kahaluu, Kaneohe, Waiahole,
Waipahu, Waikele, Palolo, Maunawili, Waikane and Ewa Beach.
Instruction:
Stay away from streams, rivers, drainage ditches, and culverts, even
if they are currently dry.
Do not cross fast flowing or rising water in your vehicle, or on
foot. Turn around, don't drown.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of drainage
ditches and streams, streets, highways, properties, and other low
lying spots.
Area Description:
Oahu in Honolulu, HI
Forcast Office:
NWS Honolulu HI
Sender:
w-nws.webmaster@noaa.gov