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National Weather ServiceHawaiiFlash Flood WarningArchive to October 16, 2026

Flash Flood Warnings in Hawaii

The National Weather Service issued 13 flash flood warnings for Hawaii in 2025 and 35 a year on average in 2008-2025; in 2021-2025 it had the 35th most of any state. 2026 through September: 53, 120% above the average of 24 for those months in 2008-2025. Oahu in Honolulu was covered most often (111 times since 2008).

How many flash flood warnings does Hawaii get?

13 flash flood warnings for Hawaii in 2025
204060802008: 3620082009: 2920092010: 2320102011: 4120112012: 2420122013: 4720132014: 3820142015: 5920152016: 3520162017: 3120172018: 7820182019: 2120192020: 2520202021: 5020212022: 1520222023: 3320232024: 2620242025: 1320252026: 5520262008-2025 average 352026 through September: 55204060802008: 3620082009: 292010: 2320102011: 412012: 2420122013: 472014: 3820142015: 592016: 3520162017: 312018: 7820182019: 212020: 2520202021: 502022: 1520222023: 332024: 2620242025: 132026: 5520262008-2025 average 352026 through September: 55204060802008: 3620082009: 292010: 2320102011: 412012: 2420122013: 472014: 3820142015: 592016: 3520162017: 312018: 7820182019: 212020: 2520202021: 502022: 1520222023: 332024: 2620242025: 132026: 5520262008-2025 average 352026 through September: 55204060802008: 3620082009: 292010: 232011: 412012: 242013: 472014: 382015: 5920152016: 352017: 312018: 782019: 212020: 2520202021: 502022: 152023: 332024: 262025: 132026: 5520262008-2025 average 352026 through September: 55

Every flash flood warning that covered part of Hawaii. 2026 is an outline: the year is not over.

The numbers
YearCount
2026 (through September)55
202513
202426
202333
202215
202150
202025
201921
201878
201731
201635
201559
201438
201347
201224
201141
201023
200929
200836

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 16, 2026.

When in the year does Hawaii get them?

Hawaii's flash flood warnings by month, 2008-2025
50100150Jan: 55JanFeb: 63FebMar: 107MarApr: 40AprMay: 35MayJun: 9JunJul: 23JulAug: 57AugSep: 45SepOct: 43OctNov: 60NovDec: 87Dec10750100150Jan: 55JanFeb: 63FebMar: 107MarApr: 40AprMay: 35MayJun: 9JunJul: 23JulAug: 57AugSep: 45SepOct: 43OctNov: 60NovDec: 87Dec10750100150Jan: 55JanFeb: 63FebMar: 107MarApr: 40AprMay: 35MayJun: 9JunJul: 23JulAug: 57AugSep: 45SepOct: 43OctNov: 60NovDec: 87Dec10750100150Jan: 55JFeb: 63FMar: 107MApr: 40AMay: 35MJun: 9JJul: 23JAug: 57ASep: 45SOct: 43ONov: 60NDec: 87D107

Sum of 2008-2025; the busiest month is labelled.

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 16, 2026.

Where in Hawaii?

County or forecast zoneSince 2008Since 2023Last issued
Oahu in Honolulu11135October 8, 2026
Honolulu1010May 26, 2016
Maui in Maui8416January 31, 2025
Kauai830May 27, 2016
Kauai in Kauai7815November 6, 2024
Hawaii in Hawaii7332September 10, 2026
Maui670May 8, 2016
Hawaii520March 26, 2016
Kahoolawe in Maui1717August 16, 2026
Niihau in Kauai1212October 2, 2026
Big Island Interior10December 27, 2008
Big Island North and East10December 27, 2008

The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 16, 2026.

The latest flash flood warnings for Hawaii in AreaZine's record

This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.

Source: National Weather Service alerts (api.weather.gov).

Every flash flood warning for Hawaii in AreaZine's record

25 notices in AreaZine's record; the latest first below. Every one, oldest first: April 7, 2026 to October 8, 2026.

  1. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  2. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  3. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  4. Flash Flood Warning: Kauai, HI Kauai expired
  5. Flash Flood Warning: Kauai, HI Kauai expired
  6. Flash Flood Warning: Hawaii in Hawaii, HI Hawaii in Hawaii expired
  7. Flash Flood Warning: Kauai, HI Kauai expired
  8. Flash Flood Warning: Kauai, HI Kauai expired
  9. Flash Flood Warning: Kauai, HI Kauai expired
  10. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  11. Flash Flood Warning: Maui, HI Maui expired
  12. Flash Flood Warning: Kauai, HI Kauai expired
  13. Flash Flood Warning: Maui, HI Maui expired
  14. Flash Flood Warning: Hawaii in Hawaii, HI Hawaii in Hawaii expired
  15. Flash Flood Warning: Hawaii in Hawaii, HI Hawaii in Hawaii expired
  16. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  17. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  18. Flash Flood Warning: Maui, HI Maui expired
  19. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired
  20. Flash Flood Warning: Oahu in Honolulu, HI Oahu in Honolulu expired

Source: National Weather Service alerts (api.weather.gov). A U.S. Government work, in the public domain.

What is a flash flood warning?

A flash flood warning means flash flooding is happening or about to happen: water rising fast in streams, streets or dry washes, usually within six hours of heavy rain or a dam or levee failure. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in Hawaii.

More records for Hawaii