National Weather ServiceArizonaSevere Thunderstorm WarningArchive to October 1, 2026
Severe Thunderstorm Warnings in Arizona
The National Weather Service issued 314 severe thunderstorm warnings for Arizona in 2025 and 336 a year on average in 2008-2025; in 2021-2025 it had the 22nd most of any state. 2026 through September: 591, 88% above the average of 314 for those months in 2008-2025. Pima was covered most often (1,415 times since 2008).
How many severe thunderstorm warnings does Arizona get?
Every severe thunderstorm warning that covered part of Arizona. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 591 |
| 2025 | 314 |
| 2024 | 651 |
| 2023 | 336 |
| 2022 | 633 |
| 2021 | 561 |
| 2020 | 187 |
| 2019 | 274 |
| 2018 | 460 |
| 2017 | 232 |
| 2016 | 226 |
| 2015 | 376 |
| 2014 | 218 |
| 2013 | 212 |
| 2012 | 234 |
| 2011 | 328 |
| 2010 | 284 |
| 2009 | 141 |
| 2008 | 389 |
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 |
|---|---|---|---|
| Pima | 1,415 | 475 | September 29, 2026 |
| Maricopa | 1,078 | 261 | September 16, 2026 |
| Pinal | 948 | 259 | September 29, 2026 |
| Cochise | 784 | 305 | September 29, 2026 |
| Yavapai | 681 | 156 | September 23, 2026 |
| Gila | 666 | 191 | September 12, 2026 |
| Coconino | 634 | 153 | September 18, 2026 |
| Mohave | 595 | 114 | September 29, 2026 |
| Santa Cruz | 472 | 203 | September 23, 2026 |
| Navajo | 352 | 81 | September 14, 2026 |
| Graham | 303 | 107 | September 29, 2026 |
| La Paz | 293 | 89 | September 17, 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 severe thunderstorm warnings for Arizona in AreaZine's record
NWS TucsonWarningSeptember 29, 2026
Severe Thunderstorm Warning: Cochise and Graham, AZ
Expired 3:30 p.m. PDT, September 29, 2026
NWS TucsonWarningSeptember 29, 2026
Severe Thunderstorm Warning: Pima, AZ
Expired 1:30 p.m. PDT, September 29, 2026
NWS Las VegasWarningSeptember 28, 2026
Severe Thunderstorm Warning: Mohave and Clark, AZ and NV
Expired 4:15 p.m. PDT, September 28, 2026
NWS TucsonWarningSeptember 24, 2026
Severe Thunderstorm Warning: Pinal, AZ
Expired 3:00 p.m. PDT, September 24, 2026
NWS TucsonWarningSeptember 24, 2026
Severe Thunderstorm Warning: Pima, AZ
Expired 1:45 p.m. PDT, September 24, 2026
NWS FlagstaffWarningSeptember 23, 2026
Severe Thunderstorm Warning: Yavapai, AZ
Expired 4:30 p.m. PDT, September 23, 2026
NWS FlagstaffWarningSeptember 23, 2026
Severe Thunderstorm Warning: Yavapai, AZ
Expired 4:30 p.m. PDT, September 23, 2026
NWS TucsonWarningSeptember 23, 2026
Severe Thunderstorm Warning: Santa Cruz, AZ
Expired 3:45 p.m. PDT, September 23, 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 severe thunderstorm warning?
A severe thunderstorm warning means a storm is producing, or is about to produce, hail one inch across or larger and/or winds of 58 mph or more. 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.