National Weather ServiceAlaskaSevere Thunderstorm WarningArchive to October 1, 2026
Severe Thunderstorm Warnings in Alaska
The National Weather Service issued 10 severe thunderstorm warnings for Alaska in 2025 and 7 a year on average in 2008-2025; in 2021-2025 it had the 50th most of any state. 2026 through September: 0, 100% below the average of 7 for those months in 2008-2025. Middle Tanana Valley was covered most often (29 times since 2008).
How many severe thunderstorm warnings does Alaska get?
Every severe thunderstorm warning that covered part of Alaska. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 0 |
| 2025 | 10 |
| 2024 | 15 |
| 2023 | 28 |
| 2022 | 6 |
| 2021 | 2 |
| 2020 | 2 |
| 2019 | 10 |
| 2018 | 5 |
| 2017 | 14 |
| 2016 | 4 |
| 2015 | 2 |
| 2014 | 1 |
| 2013 | 0 |
| 2012 | 0 |
| 2011 | 0 |
| 2010 | 8 |
| 2009 | 2 |
| 2008 | 10 |
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 Alaska 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 Alaska?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Middle Tanana Valley | 29 | 8 | August 12, 2023 |
| Yukon Flats and Surrounding Uplands | 23 | 13 | August 10, 2023 |
| Deltana and Tanana Flats | 18 | 3 | August 12, 2023 |
| Central Interior | 17 | 12 | June 16, 2025 |
| Upper Tanana Valley and the Fortymile Country | 12 | 5 | August 11, 2023 |
| Bristol Bay | 7 | 0 | June 5, 2019 |
| Delta Junction | 6 | 6 | July 8, 2025 |
| Kuskokwim Delta | 6 | 0 | June 6, 2018 |
| Chatanika River Valley | 5 | 5 | June 20, 2025 |
| Fairbanks Metro Area | 5 | 5 | June 20, 2025 |
| Yukon-Koyukuk | 5 | 0 | July 12, 2022 |
| Eielson AFB and Salcha | 4 | 4 | June 18, 2025 |
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.
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 Alaska.