National Weather ServiceMontanaFlood WarningArchive to October 1, 2026
Flood Warnings in Montana
The National Weather Service issued 9 flood warnings for Montana in 2025 and 44 a year on average in 2008-2025; in 2021-2025 it had the 45th most of any state. 2026 through September: 7, 84% below the average of 43 for those months in 2008-2025. Valley was covered most often (110 times since 2008).
How many flood warnings does Montana get?
Every flood warning that covered part of Montana. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 7 |
| 2025 | 9 |
| 2024 | 5 |
| 2023 | 31 |
| 2022 | 25 |
| 2021 | 1 |
| 2020 | 20 |
| 2019 | 53 |
| 2018 | 128 |
| 2017 | 37 |
| 2016 | 28 |
| 2015 | 15 |
| 2014 | 46 |
| 2013 | 47 |
| 2012 | 22 |
| 2011 | 220 |
| 2010 | 34 |
| 2009 | 19 |
| 2008 | 45 |
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 |
|---|---|---|---|
| Valley | 110 | 8 | June 4, 2023 |
| Phillips | 67 | 3 | April 16, 2023 |
| Blaine | 48 | 9 | July 28, 2025 |
| Missoula | 41 | 1 | May 3, 2023 |
| Garfield | 37 | 3 | June 9, 2023 |
| Carbon | 37 | 0 | June 13, 2022 |
| Gallatin | 35 | 0 | June 13, 2022 |
| Cascade | 35 | 2 | May 17, 2023 |
| Madison | 34 | 2 | February 6, 2025 |
| Flathead | 34 | 2 | June 29, 2026 |
| Sweet Grass | 30 | 0 | June 13, 2022 |
| Ravalli | 30 | 0 | June 12, 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.
The latest flood warnings for Montana in AreaZine's record
NWS Great FallsWarningJune 30, 2026
Flood Warning: Glacier, MT
Expired 4:30 p.m. MDT, July 1, 2026
NWS Great FallsWarningJune 29, 2026
Flood Warning: Glacier and Pondera, MT
Expired 3:15 p.m. MDT, June 30, 2026
NWS Great FallsWarningJune 29, 2026
Flood Warning: Glacier and Pondera, MT
Expired 2:45 p.m. MDT, June 30, 2026
NWS MissoulaWarningJune 29, 2026
Flood Warning: Flathead, MT
Expired 10:45 a.m. MDT, June 30, 2026
NWS Great FallsWarningJune 29, 2026
Flood Warning: Glacier, MT
Expired 12:45 p.m. MDT, June 30, 2026
NWS MissoulaWarningJune 29, 2026
Flood Warning: Lake, MT
Expired 10:45 a.m. MDT, June 30, 2026
NWS MissoulaWarningMay 31, 2026
Flood Warning: Flathead, Lake and Sanders, MT
Expired 7:30 p.m. MDT, June 1, 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 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 Montana.