Alert archive / Hawaii / Honolulu County / Flash Flood Warnings

Flash Flood Warnings in Honolulu County, Hawaii, 2026

15 flash flood warnings in 2026. An alert counts here when it covered this county. The archive of flash flood warnings reaches back to 1986.

Honolulu County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Flash Flood Warnings
15
Busiest month
March7 flash flood warnings
Busiest day
March 20, 20263 flash flood warnings

Over time

By month

The alerts

Every alert, in the order issued. Times are local, Hawaii-Aleutian Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Feb 21, 3:35 AM HSTFlash Flood WarningHFO11 hr
Mar 12, 7:16 AM HSTFlash Flood WarningHFO7 hr
Mar 13, 12:22 PM HSTFlash Flood WarningHFO16 hr
Mar 19, 10:57 PM HSTFlash Flood Warning EmergencyHFO30 hr
Mar 20, 8:22 AM HSTFlash Flood WarningHFO29 hr
Mar 20, 10:37 AM HSTFlash Flood WarningHFO19 hr
Mar 21, 4:55 AM HSTFlash Flood WarningHFO5 hr
Mar 23, 1:25 PM HSTFlash Flood WarningHFO3 hr
Apr 10, 11:04 AM HSTFlash Flood WarningHFO6 hr
Apr 10, 4:46 PM HSTFlash Flood WarningHFO2 hr
May 15, 1:32 PM HSTFlash Flood WarningHFO118 min
May 15, 3:30 PM HSTFlash Flood WarningHFO2 hr
Aug 16, 4:36 AM HSTFlash Flood WarningHFO7 hr
Aug 16, 2:52 PM HSTFlash Flood WarningHFO2 hr
Sep 6, 2:47 PM HSTFlash Flood WarningHFO2 hr

The busiest days

Days with the most alerts issued, by UTC date.

  1. March 20, 20263flash flood warnings
  2. February 21, 20261flash flood warnings
  3. March 12, 20261flash flood warnings
  4. March 13, 20261flash flood warnings
  5. March 21, 20261flash flood warnings
  6. March 23, 20261flash flood warnings
  7. April 10, 20261flash flood warnings
  8. April 11, 20261flash flood warnings
  9. May 15, 20261flash flood warnings
  10. May 16, 20261flash flood warnings

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive2025

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.