National Weather ServiceMontanaFlood AdvisoryArchive to October 1, 2026
Flood Advisories in Montana
The National Weather Service issued 84 flood advisories for Montana in 2025 and 66 a year on average in 2008-2025; in 2021-2025 it had the 30th most of any state. 2026 through September: 92, 44% above the average of 64 for those months in 2008-2025. Cascade was covered most often (112 times since 2008).
How many flood advisories does Montana get?
Every flood advisory that covered part of Montana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 92 |
| 2025 | 84 |
| 2024 | 30 |
| 2023 | 251 |
| 2022 | 83 |
| 2021 | 37 |
| 2020 | 39 |
| 2019 | 82 |
| 2018 | 101 |
| 2017 | 47 |
| 2016 | 29 |
| 2015 | 27 |
| 2014 | 78 |
| 2013 | 65 |
| 2012 | 33 |
| 2011 | 66 |
| 2010 | 58 |
| 2009 | 30 |
| 2008 | 41 |
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 Montana 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 Montana?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Cascade | 112 | 39 | September 7, 2026 |
| Fergus | 96 | 38 | July 15, 2026 |
| Lewis and Clark | 90 | 42 | July 23, 2026 |
| Judith Basin | 85 | 32 | September 7, 2026 |
| Blaine | 79 | 41 | June 27, 2026 |
| Missoula | 75 | 10 | August 5, 2025 |
| Valley | 74 | 17 | June 28, 2026 |
| Garfield | 69 | 20 | September 19, 2026 |
| Chouteau | 65 | 37 | September 7, 2026 |
| Hill | 62 | 31 | May 31, 2026 |
| Gallatin | 60 | 18 | July 22, 2026 |
| Phillips | 58 | 12 | June 28, 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.
What is a flood advisory?
A flood advisory covers flooding that is less serious than a warning, such as water on roads or in low-lying areas, that is still a hazard to drivers and walkers. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in Montana.