Liberty County, Montana severe weather history spans 143 recorded events between 1956 and 2025. The dominant hazard is thunderstorm wind, accounting for 57.3% of all recorded events. It ranks #2,732 nationally and #42 in Montana.
143
Recorded events
0
Direct deaths
0
Direct injuries
$939K
Property damage
The record
What the Liberty County, Montana severe weather history record shows
Across the archive, Liberty County, Montana severe weather history averages 2.1 recorded events a year. The busiest stretch on record is the 2020s, with 52 events logged in that decade alone. Roughly 17 events fall before 1990 and 126 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The costliest is thunderstorm wind, with $558K in reported property damage. In total, 7 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Liberty County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Thunderstorm Wind | 82 | 0 | $558K | 75 | 1980–2025 |
| Hail | 52 | 0 | $56K | 3 | 1956–2022 |
| Tornado | 4 | 0 | $275K | F1 | 1977–1999 |
| Flood | 2 | 0 | $50K | 0 | 2018–2023 |
| Lightning | 1 | 0 | $0 | 0 | 2003–2003 |
| Funnel Cloud | 1 | 0 | $0 | 0 | 2019–2019 |
| Heavy Rain | 1 | 0 | $0 | 0 | 2013–2013 |
Decade by decade
Liberty County, Montana severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
4 mapped tornado paths intersect this county: 4 touched down inside it and 0 crossed in from a neighbouring county. This comes from path geometry, not county-tagged reports.
| Date | Scale | Deaths | Injuries | Path length | Origin |
|---|---|---|---|---|---|
| 1980-05-25 | EF1 | 0 | 0 | 0.1 mi | Touched down here |
| 1977-05-24 | EF1 | 0 | 0 | 0.1 mi | Touched down here |
| 1999-06-02 | EF0 | 0 | 0 | 0.1 mi | Touched down here |
| 1996-06-27 | EF0 | 0 | 0 | 0.2 mi | Touched down here |
Context
Risk, population and federal disasters
Very Low
FEMA NRI risk rating
1,952
Population (ACS)
$169K
Median home value
10
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Mar 31, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Aug 30, 2018 | Flood | FLOODING | DR |
| May 24, 2016 | Severe Storm | SEVERE WINTER STORM AND STRAIGHT-LINE WINDS | DR |
| Jun 17, 2011 | Severe Storm | SEVERE STORMS AND FLOODING | DR |
| Sep 13, 2005 | Hurricane | HURRICANE KATRINA EVACUATION | EM |
Quick answers
Frequently asked
How many severe weather events have been recorded in Liberty County, Montana?
143 events are on record between 1956 and 2025, causing 0 direct deaths and $939K in property damage.
What is the most common severe weather hazard in Liberty County?
Thunderstorm Wind, with 82 recorded events — 57.3% of everything in the archive for this county.
How many tornadoes have crossed Liberty County?
4 mapped tornado paths intersect the county boundary; 4 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Liberty County?
10 federal disaster declarations from FEMA include Liberty County, each tied to a specific incident period.
How risky is Liberty County compared with the rest of the country?
FEMA's National Risk Index rates Liberty County as very low risk, placing it in the 6 percentile of its state for expected annual loss.
Where does the Liberty County, Montana severe weather history data come from?
Every figure is drawn from United States federal public-domain records: NOAA/NCEI Storm Events for the event archive, NOAA SPC SVRGIS for mapped tornado paths, FEMA for disaster declarations and risk ratings, and the U.S. Census for population context. Dates are shown in UTC and recent entries may still be revised by NOAA.
Nearby
Neighbouring counties
- Lewis and Clark County 314
- Lincoln County 70
- Lake County 111
- McCone County 479
- Judith Basin County 247
- Madison County 84
Cite this page
“Liberty County, Montana.” Severe Weather History. severeweatherhistory.com/county/montana/liberty-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.