Alert archive / Hawaii / Flash Flood Warnings

Flash Flood Warnings in Hawaii, 2021

50 flash flood warnings in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.

Flash Flood Warnings by county

Each county as a circle sized by its count in 2021. Tap one for its archive.

Flash Flood Warnings
50
Busiest month
March27 flash flood warnings
Busiest day
December 6, 20217 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.

IssuedProductOfficeCountiesLasted
Jan 18, 12:51 AM HSTFlash Flood WarningHFOKalawao6 hr
Jan 18, 2:25 PM HSTFlash Flood WarningHFOKalawao9 hr
Jan 18, 2:59 PM HSTFlash Flood WarningHFOKalawao3 hr
Jan 19, 1:18 PM HSTFlash Flood WarningHFOKauai9 hr
Jan 25, 10:47 AM HSTFlash Flood WarningHFOHawaii6 hr
Jan 25, 3:45 PM HSTFlash Flood WarningHFOHonolulu3 hr
Jan 26, 3:30 AM HSTFlash Flood WarningHFOHawaii2 hr
Feb 17, 2:27 AM HSTFlash Flood WarningHFOKauai6 hr
Feb 19, 12:58 PM HSTFlash Flood WarningHFOKauai9 hr
Feb 27, 9:59 AM HSTFlash Flood WarningHFOKalawao86 min
Mar 8, 11:15 AM HSTFlash Flood WarningHFOKalawao7 hr
Mar 8, 2:42 PM HSTFlash Flood Warning Considerable damage threatHFOKalawao5 hr
Mar 8, 10:05 PM HSTFlash Flood WarningHFOKalawao5 hr
Mar 9, 8:33 AM HSTFlash Flood WarningHFOHonolulu117 min
Mar 9, 10:31 AM HSTFlash Flood WarningHFOHonolulu6 hr
Mar 9, 3:21 PM HSTFlash Flood Warning EmergencyConsiderable damage threatHFOHonolulu9 hr
Mar 9, 4:30 PM HSTFlash Flood WarningHFOKauai17 hr
Mar 10, 5:26 AM HSTFlash Flood WarningHFOHawaii3 hr
Mar 10, 6:36 AM HSTFlash Flood WarningHFOHawaii3 hr
Mar 10, 1:45 PM HSTFlash Flood WarningHFOHonolulu3 hr
Mar 10, 2:36 PM HSTFlash Flood WarningHFOHonolulu97 min
Mar 10, 6:22 PM HSTFlash Flood WarningHFOHonolulu5 hr
Mar 10, 6:26 PM HSTFlash Flood WarningHFOKauai3 hr
Mar 11, 2:22 PM HSTFlash Flood WarningHFOHonolulu2 hr
Mar 11, 4:15 PM HSTFlash Flood WarningHFOHonolulu3 hr
Mar 12, 5:04 AM HSTFlash Flood WarningHFOKauai2 hr
Mar 12, 11:02 AM HSTFlash Flood Warning Considerable damage threatHFOKauai3 hr
Mar 12, 1:39 PM HSTFlash Flood Warning Considerable damage threatHFOKauai6 hr
Mar 12, 4:08 PM HSTFlash Flood WarningHFOHonolulu3 hr
Mar 12, 8:36 PM HSTFlash Flood WarningHFOKalawao18 hr
Mar 13, 5:22 AM HSTFlash Flood WarningHFOKalawao2 hr
Mar 13, 6:22 AM HSTFlash Flood WarningHFOKauai2 hr
Mar 15, 1:50 PM HSTFlash Flood WarningHFOHonolulu3 hr
Mar 15, 2:28 PM HSTFlash Flood WarningHFOHonolulu4 hr
Mar 29, 8:54 AM HSTFlash Flood WarningHFOKauai3 hr
Mar 29, 9:53 AM HSTFlash Flood WarningHFOKauai2 hr
Mar 29, 4:56 PM HSTFlash Flood WarningHFOKauai3 hr
Oct 12, 2:26 AM HSTFlash Flood WarningHFOHawaii6 hr
Nov 14, 5:20 AM HSTFlash Flood WarningHFOKalawao116 min
Dec 4, 1:59 AM HSTFlash Flood WarningHFOKalawao109 min
Dec 5, 3:56 PM HSTFlash Flood WarningHFOHawaii5 hr
Dec 5, 4:27 PM HSTFlash Flood WarningHFOKalawao5 hr
Dec 5, 6:22 PM HSTFlash Flood WarningHFOKalawao3 hr
Dec 5, 9:16 PM HSTFlash Flood Warning Considerable damage threatHFOKalawao12 hr
Dec 5, 9:20 PM HSTFlash Flood WarningHFOKalawao11 hr
Dec 6, 11:30 AM HSTFlash Flood WarningHFOHawaii2 hr
Dec 6, 1:16 PM HSTFlash Flood WarningHFOHonolulu15 hr
Dec 17, 2:39 PM HSTFlash Flood WarningHFOKalawao66 min
Dec 30, 8:29 PM HSTFlash Flood WarningHFOHonolulu3 hr
Dec 31, 6:26 AM HSTFlash Flood WarningHFOKauai3 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

The busiest days

Days with the most alerts issued, by UTC date.

  1. December 6, 20217flash flood warnings
  2. March 10, 20215flash flood warnings
  3. March 12, 20215flash flood warnings
  4. March 9, 20214flash flood warnings
  5. March 13, 20214flash flood warnings
  6. January 19, 20213flash flood warnings
  7. March 11, 20213flash flood warnings
  8. January 26, 20212flash flood warnings
  9. March 29, 20212flash flood warnings
  10. December 31, 20212flash flood warnings
  11. January 18, 20211flash flood warnings
  12. January 25, 20211flash flood warnings

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

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. Rebuilt daily.