National Weather ServiceArizonaFlash Flood WarningArchive to October 1, 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 (1,024 times since 2008).
How many flash flood warnings does Arizona get?
Every flash flood warning that covered part of Arizona. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 539 |
| 2025 | 276 |
| 2024 | 263 |
| 2023 | 164 |
| 2022 | 946 |
| 2021 | 689 |
| 2020 | 104 |
| 2019 | 242 |
| 2018 | 391 |
| 2017 | 262 |
| 2016 | 150 |
| 2015 | 170 |
| 2014 | 235 |
| 2013 | 234 |
| 2012 | 262 |
| 2011 | 153 |
| 2010 | 174 |
| 2009 | 60 |
| 2008 | 183 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does Arizona get them?
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 1, 2026.
Where in Arizona?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Mohave | 1,024 | 154 | September 29, 2026 |
| Pima | 847 | 222 | September 30, 2026 |
| Maricopa | 765 | 125 | September 29, 2026 |
| Coconino | 737 | 221 | September 29, 2026 |
| Yavapai | 647 | 140 | September 30, 2026 |
| Gila | 516 | 126 | September 16, 2026 |
| Pinal | 418 | 89 | September 30, 2026 |
| Cochise | 387 | 132 | September 29, 2026 |
| La Paz | 293 | 44 | September 2, 2026 |
| Navajo | 234 | 43 | September 23, 2026 |
| Santa Cruz | 202 | 69 | September 14, 2026 |
| Apache | 147 | 32 | September 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 1, 2026.
The latest flash flood warnings for Arizona in AreaZine's record
NWS FlagstaffWarningSeptember 29, 2026
Flash Flood Warning: Yavapai, AZ
Expired 12:15 a.m. PDT, September 30, 2026
NWS TucsonWarningSeptember 29, 2026
Flash Flood Warning: Pima and Pinal, AZ
Expired 10:15 p.m. PDT, September 29, 2026
NWS FlagstaffWarningSeptember 29, 2026
Flash Flood Warning: Yavapai, AZ
Expired 8:00 p.m. PDT, September 29, 2026
NWS PhoenixWarningSeptember 29, 2026
Flash Flood Warning: Maricopa, AZ
Expired 8:30 p.m. PDT, September 29, 2026
NWS TucsonWarningSeptember 29, 2026
Flash Flood Warning: Cochise, AZ
Expired 10:30 p.m. PDT, September 29, 2026
NWS FlagstaffWarningSeptember 29, 2026
Flash Flood Warning: Yavapai, AZ
Expired 6:15 p.m. PDT, September 29, 2026
NWS Las VegasWarningSeptember 29, 2026
Flash Flood Warning: Mohave, AZ
Expired 5:45 p.m. PDT, September 29, 2026
NWS TucsonWarningSeptember 29, 2026
Flash Flood Warning: Cochise and Graham, AZ
Expired 8:45 p.m. PDT, September 29, 2026
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).
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.