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Treasure County, Montana severe weather history spans 159 recorded events between 1955 and 2025. The dominant hazard is hail, accounting for 54.7% of all recorded events. It ranks #2,664 nationally and #40 in Montana.
159
Recorded events
0
Direct deaths
0
Direct injuries
$353K
Property damage
The record
What the Treasure County, Montana severe weather history record shows
Across the archive, Treasure County, Montana severe weather history averages 2.3 recorded events a year. The busiest stretch on record is the 2000s, with 64 events logged in that decade alone. Roughly 7 events fall before 1990 and 152 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The costliest is tornado, with $303K 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 Treasure County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Hail | 87 | 0 | $0 | 2.75 | 1967–2024 |
| Thunderstorm Wind | 53 | 0 | $50K | 70 | 1980–2025 |
| Flood | 8 | 0 | $0 | 0 | 2011–2019 |
| Tornado | 3 | 0 | $303K | F1 | 1955–1998 |
| Funnel Cloud | 3 | 0 | $0 | 0 | 1997–1999 |
| Flash Flood | 3 | 0 | $0 | 0 | 1999–2013 |
| Heavy Rain | 2 | 0 | $0 | 0 | 1998–2006 |
Decade by decade
Treasure 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: 2 touched down inside it and 2 crossed in from a neighbouring county. This comes from path geometry, not county-tagged reports.
| Date | Scale | Deaths | Injuries | Path length | Origin |
|---|---|---|---|---|---|
| 1955-07-06 | EF1 | 0 | 0 | 2.0 mi | Touched down here |
| 1998-08-23 | EF0 | 0 | 0 | 7.0 mi | Crossed in |
| 1998-08-23 | EF0 | 0 | 0 | 7.0 mi | Crossed in |
| 1991-06-21 | EF0 | 0 | 0 | 0.2 mi | Touched down here |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Two small tornadoes in Treasure County knocked down several trees, antennas and power poles. One power pole which contained a transformer started some fires after it fell. The tornadoes also damaged some houses and sheds.
Flooding due to an ice jam was reported on the Yellowstone River east of Amelia Island just north of Hysham. Low-land flooding along the river and adjacent farm fields was reported. One home experience some flooding. Otherwise, no major impacts were reported with this ice jam.
A supercell thunderstorm moved rapidly northeast across far northwestern Treasure County. This storm then put out an outflow boundary that raced eastward across central Treasure County into the Yellowstone River Valley. An area of enhanced wind, estimated at 80 mph, developed in an area just north of Hysham northward to the Yellowstone River. It���s estimated that upwards of 50 trees were either uprooted or snapped off. In addition, a mobile home was pushed off its blocks and a small garage (poorly constructed) was destroyed but contents left in place. Another home had numerous evergreens uprooted with damage to a garage and shed.
Context
Risk, population and federal disasters
Very Low
FEMA NRI risk rating
732
Population (ACS)
$230K
Median home value
11
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Oct 11, 2023 | Flood | FLOODING | DR |
| Jun 16, 2022 | Flood | SEVERE STORM AND FLOODING | DR |
| Mar 31, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| May 24, 2019 | Flood | FLOODING | DR |
| Oct 31, 2018 | Flood | FLOODING | DR |
Quick answers
Frequently asked
How many severe weather events have been recorded in Treasure County, Montana?
159 events are on record between 1955 and 2025, causing 0 direct deaths and $353K in property damage.
What is the most common severe weather hazard in Treasure County?
Hail, with 87 recorded events — 54.7% of everything in the archive for this county.
How many tornadoes have crossed Treasure County?
4 mapped tornado paths intersect the county boundary; 2 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Treasure County?
11 federal disaster declarations from FEMA include Treasure County, each tied to a specific incident period.
How risky is Treasure County compared with the rest of the country?
FEMA's National Risk Index rates Treasure County as very low risk, placing it in the 1 percentile of its state for expected annual loss.
Where does the Treasure 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
- Toole County 143
- Valley County 1,247
- Teton County 216
- Wheatland County 160
- Sweet Grass County 188
- Wibaux County 242
Cite this page
“Treasure County, Montana.” Severe Weather History. severeweatherhistory.com/county/montana/treasure-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.