Hail HistoryHome › Montana › Flathead County
Hail history for Flathead County, MT
56 hail reports in Flathead County since 2006 on 30 days. The largest stones measured 2.5 in (tennis ball) on Jul 7, 2022.
Cities in Flathead County
- Kalispell
13 hail days - Evergreen
13 hail days - Whitefish
10 hail days - Columbia Falls
11 hail days - Bigfork
14 hail days - Lakeside
9 hail days
Recent hail in Flathead County
| Date | Hail size | Where |
|---|---|---|
| Jul 17, 2026 | 1 in quarter | Lupfer 1 hail report |
| May 28, 2026 | 1.25 in half dollar | Evergreen, Kalispell City Airport, Martin City 3 hail reports |
| May 11, 2025 | 1 in quarter | Half Moon 1 hail report |
One row per day: the largest hail reported in the county that day, the places and the number of reports.
Hail days in Flathead County by year
When hail season peaks in Flathead County
Damaging thunderstorm winds in Flathead County
31 reports of damaging thunderstorm wind in Flathead County since 2006, on 20 days. The strongest measured gust was 78 mph on May 31, 2020.
| Date | Strongest gust | Where |
|---|---|---|
| Aug 22, 2026 | 69 mph, measured | Trailcreek, La Salle, Stryker 4 wind reports |
| May 28, 2026 | 58 mph, estimated | Java 1 wind report |
| Aug 23, 2024 | 60 mph, estimated | Holt 1 wind report |
| Aug 22, 2023 | 68 mph, measured | Kalispell Intl. 1 wind report |
| Jun 15, 2021 | 49 mph, estimated | Niarada 1 wind report |
| May 31, 2020 | 78 mph, measured | Somers 1 wind report |
| Aug 10, 2019 | 60 mph, measured | Bigfork 1 wind report |
| Jul 7, 2017 | 58 mph, estimated | Kalispell 1 wind report |
| Aug 29, 2013 | 60 mph, estimated | Apgar, Kalispell Intl., Columbia Falls 4 wind reports |
| Aug 26, 2013 | 55 mph, measured | Kalispell 1 wind report |
Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.
Filing a roof or car hail claim?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Flathead County; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).