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National Weather ServiceArizonaFlash Flood WarningArchive to October 15, 2026

Flash Flood Warnings in Arizona

The National Weather Service issued 276 flash flood warnings for Arizona in 2025 and 275 a year on average in 2008-2025; in 2021-2025 it had the 2nd most of any state. 2026 through September: 539, 106% above the average of 261 for those months in 2008-2025. Mohave was covered most often (1,029 times since 2008).

How many flash flood warnings does Arizona get?

276 flash flood warnings for Arizona in 2025
2505007501k2008: 18320082009: 6020092010: 17420102011: 15320112012: 26220122013: 23420132014: 23520142015: 17020152016: 15020162017: 26220172018: 39120182019: 24220192020: 10420202021: 68920212022: 94620222023: 16420232024: 26320242025: 27620252026: 55120262008-2025 average 2752026 through September: 5512505007501k2008: 18320082009: 602010: 17420102011: 1532012: 26220122013: 2342014: 23520142015: 1702016: 15020162017: 2622018: 39120182019: 2422020: 10420202021: 6892022: 94620222023: 1642024: 26320242025: 2762026: 55120262008-2025 average 2752026 through September: 5512505007501k2008: 18320082009: 602010: 17420102011: 1532012: 26220122013: 2342014: 23520142015: 1702016: 15020162017: 2622018: 39120182019: 2422020: 10420202021: 6892022: 94620222023: 1642024: 26320242025: 2762026: 55120262008-2025 average 2752026 through September: 5512505007501k2008: 18320082009: 602010: 1742011: 1532012: 2622013: 2342014: 2352015: 17020152016: 1502017: 2622018: 3912019: 2422020: 10420202021: 6892022: 9462023: 1642024: 2632025: 2762026: 55120262008-2025 average 2752026 through September: 551

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

The numbers
YearCount
2026 (through September)551
2025276
2024263
2023164
2022946
2021689
2020104
2019242
2018391
2017262
2016150
2015170
2014235
2013234
2012262
2011153
2010174
200960
2008183

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 15, 2026.

When in the year does Arizona get them?

Arizona's flash flood warnings by month, 2008-2025
1k2kJan: 35JanFeb: 23FebMar: 29MarApr: 5AprMay: 18MayJun: 132JunJul: 1,770JulAug: 1,949AugSep: 745SepOct: 200OctNov: 38NovDec: 14Dec1,9491k2kJan: 35JanFeb: 23FebMar: 29MarApr: 5AprMay: 18MayJun: 132JunJul: 1,770JulAug: 1,949AugSep: 745SepOct: 200OctNov: 38NovDec: 14Dec1,9491k2kJan: 35JanFeb: 23FebMar: 29MarApr: 5AprMay: 18MayJun: 132JunJul: 1,770JulAug: 1,949AugSep: 745SepOct: 200OctNov: 38NovDec: 14Dec1,9491k2kJan: 35JFeb: 23FMar: 29MApr: 5AMay: 18MJun: 132JJul: 1,770JAug: 1,949ASep: 745SOct: 200ONov: 38NDec: 14D1,949

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 15, 2026.

Where in Arizona?

County or forecast zoneSince 2008Since 2023Last issued
Mohave1,029159October 11, 2026
Pima847222September 30, 2026
Maricopa766126October 11, 2026
Coconino739223October 12, 2026
Yavapai648141October 11, 2026
Gila517127October 11, 2026
Pinal41889September 30, 2026
Cochise387132September 29, 2026
La Paz29647October 11, 2026
Navajo23443September 23, 2026
Santa Cruz20269September 14, 2026
Apache14732September 18, 2026

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 15, 2026.

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

521 notices in AreaZine's record; the latest first below. Every one, oldest first: June 14, 2026 to August 17, 2026 · August 19, 2026 to October 12, 2026.

  1. Flash Flood Warning: Coconino, AZ Coconino expired
  2. Flash Flood Warning: Coconino, AZ Coconino expired
  3. Flash Flood Warning: Mohave, Clark and Lincoln, AZ and NV Mohave, Clark and Lincoln expired
  4. Flash Flood Warning: Mohave, Clark and Lincoln, AZ and NV Mohave, Clark and Lincoln expired
  5. Flash Flood Warning: Mohave and Clark, AZ and NV Mohave and Clark expired
  6. Flash Flood Warning: Mohave, Clark and Lincoln, AZ and NV Mohave, Clark and Lincoln expired
  7. Flash Flood Warning: Gila and Maricopa, AZ Gila and Maricopa expired
  8. Flash Flood Warning: Mohave and Clark, AZ and NV Mohave and Clark expired
  9. Flash Flood Warning: Yavapai, AZ Yavapai expired
  10. Flash Flood Warning: Gila and Maricopa, AZ Gila and Maricopa expired
  11. Flash Flood Warning: Mohave, AZ Mohave expired
  12. Flash Flood Warning: Mohave, AZ Mohave expired
  13. Flash Flood Warning: Mohave, AZ Mohave expired
  14. Flash Flood Warning: Mohave, AZ Mohave expired
  15. Flash Flood Warning: Mohave, AZ Mohave expired
  16. Flash Flood Warning: La Paz, Imperial and Riverside, AZ and CA La Paz, Imperial and Riverside expired
  17. Flash Flood Warning: La Paz, Imperial and Riverside, AZ and CA La Paz, Imperial and Riverside expired
  18. Flash Flood Warning: Gila and Maricopa, AZ Gila and Maricopa expired
  19. Flash Flood Warning: Mohave, AZ Mohave expired
  20. Flash Flood Warning: Mohave, AZ Mohave 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 Arizona.

How does Arizona compare with its neighbours?

Arizona gets more flash flood warnings than any state on its border.

StateA year, 2021-2025A year, 2008-2025Rank of all states
Arizona4682752nd
New Mexico2951653rd
California2131774th
Colorado1751166th
Utah1067320th
Nevada676826th

Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 15, 2026.

More records for Arizona