Flood events in Missoula County, Montana The flood events on record, by date and by year
This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).
NCEI has 24 flood events on record for Missoula County, Montana, from 1996 through 30 Jun 2026.
The newest flood event on record is on 3 May 2023.
From 2016 through 2025, NCEI has 19 flood events on record for the county.
The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .
Date of the data: NCEI storm events through . Event types on this page: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
Newest flood events on record
Flood
1 mile N of MISSOULA SOUTHWEST
Flood
1 mile S of MISSOULA SOUTHWEST
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flash Flood
2 miles S of SEELEY LAKE ARPT
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flood
2 miles NNW of MISSOULA SOUTHWEST
Flood
4 miles WNW of POST
Flood
3 miles NW of POST
Flood
3 miles SSW of ORCHARD HOMES
Flood
2 miles NW of POST. Damage estimate: $450 thousand
Flood
8 miles SW of SEELEY LAKE
Flood
1 mile NNW of BONNER
Flood
2 miles N of MISSOULA SOUTHWEST
Flood
2 miles N of MISSOULA SOUTHWEST. Damage estimate: $15 thousand
Flood
4 miles SSE of SEELEY LAKE. Damage estimate: $15 thousand
Flood
3 miles ESE of LOLO
Flood
1 mile NW of MISSOULA SOUTHWEST. Damage estimate: $40 thousand
Flash Flood
1 mile NE of FRENCHTOWN
Flash Flood
At EVARO
Flood
At NEAR LOLO
A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. NCEI gives no magnitude for this hazard.
Flood events by year
| Decade | Year that ends in 0 | Year that ends in 1 | Year that ends in 2 | Year that ends in 3 | Year that ends in 4 | Year that ends in 5 | Year that ends in 6 | Year that ends in 7 | Year that ends in 8 | Year that ends in 9 | All |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1960s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1970s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1990s | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 |
| 2000s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 2010s | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 11 | 1 | 14 |
| 2020s | 1 | 3 | 2 | 1 | 0 | 0 | 0 (part of the year) | 7 |
A darker cell has a larger count. The number is in each cell.
Flood and flash flood events are on record from 1996. The year 2026 has the events through 30 Jun 2026 only.
By month, all years
- Jan0 events
- Feb1 event
- Mar0 events
- Apr2 events
- May13 events
- Jun6 events
- Jul1 event
- Aug1 event
- Sep0 events
- Oct0 events
- Nov0 events
- Dec0 events
Beside the other counties
| Measure | Missoula | All counties of Montana | All counties of the United States |
|---|---|---|---|
| Flood events, 1996 to 2026 | 24 | 1,094 | 177,902 |
| Events for each 100 square miles | 0.9 | 0.8 | 5.0 |
| Events for each 10,000 residents | 2.0 | 9.9 | 5.4 |
The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.
Official channels
- NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
- National Weather Service: Missoula, MT (opens in a new tab)The forecast office that issues the weather warnings for the county.
- FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.
These links open the pages of the agencies. The site checked the links on .
Cite this page
County Hazards. "Flood events on record for Missoula County, Montana". https://countyhazards.com/county/mt/missoula/flood/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on .
Questions
- Which month has the most flood events on record for Missoula County?
- May has 13 of the 24 flood events on record from 1996 through 30 Jun 2026.
- How many flood events are on record for Montana?
- NCEI has 1,175 flood events on record for Montana from 1996 through 30 Jun 2026. That count has every forecast zone of the state.
- How does Missoula County compare with the other counties of Montana?
- The counties of Montana have 0.8 flood events for each 100 square miles. Missoula County has 0.9.