National Weather ServiceIdahoFlood WarningArchive to October 1, 2026
Flood Warnings in Idaho
The National Weather Service issued 11 flood warnings for Idaho in 2025 and 24 a year on average in 2008-2025; in 2021-2025 it had the 44th most of any state. 2026 through September: 3, 87% below the average of 23 for those months in 2008-2025. Latah was covered most often (48 times since 2008).
How many flood warnings does Idaho get?
Every flood warning that covered part of Idaho. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 3 |
| 2025 | 11 |
| 2024 | 8 |
| 2023 | 36 |
| 2022 | 20 |
| 2021 | 1 |
| 2020 | 7 |
| 2019 | 29 |
| 2018 | 45 |
| 2017 | 115 |
| 2016 | 3 |
| 2015 | 4 |
| 2014 | 12 |
| 2013 | 1 |
| 2012 | 36 |
| 2011 | 41 |
| 2010 | 30 |
| 2009 | 16 |
| 2008 | 18 |
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 Idaho 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 Idaho?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Latah | 48 | 7 | March 14, 2026 |
| Shoshone | 47 | 5 | December 12, 2025 |
| Blaine | 45 | 9 | May 23, 2023 |
| Fremont | 39 | 1 | May 17, 2023 |
| Madison | 37 | 3 | June 13, 2024 |
| Kootenai | 35 | 2 | December 12, 2025 |
| Custer | 34 | 6 | June 19, 2023 |
| Benewah | 32 | 2 | February 23, 2025 |
| Bannock | 29 | 8 | April 22, 2024 |
| Washington | 27 | 2 | March 4, 2025 |
| Bingham | 26 | 4 | May 1, 2024 |
| Boundary | 24 | 0 | June 14, 2022 |
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 flood warning?
A flood warning means flooding is happening or about to happen. The NWS issues it both for rivers at forecast points (river flood warnings) and for areas where water ponds or runs off (areal flood warnings); AreaZine counts both. 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 Idaho.