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Silver Bow County, Montana severe weather history spans 81 recorded events between 1958 and 2025. The dominant hazard is hail, accounting for 53.1% of all recorded events. It ranks #2,953 nationally and #50 in Montana.
81
Recorded events
0
Direct deaths
0
Direct injuries
$138K
Property damage
The record
What the Silver Bow County, Montana severe weather history record shows
Across the archive, Silver Bow County, Montana severe weather history averages 1.2 recorded events a year. The busiest stretch on record is the 2000s, with 30 events logged in that decade alone. Roughly 15 events fall before 1990 and 66 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The costliest is hail, with $61K in reported property damage. In total, 6 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Silver Bow County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Hail | 43 | 0 | $61K | 2.5 | 1958–2019 |
| Thunderstorm Wind | 26 | 0 | $61K | 65 | 1974–2024 |
| Flash Flood | 6 | 0 | $16K | 0 | 1996–2023 |
| Heavy Rain | 4 | 0 | $0 | 75 | 2004–2025 |
| Funnel Cloud | 1 | 0 | $0 | 0 | 1997–1997 |
| Flood | 1 | 0 | $1K | 0 | 2017–2017 |
Decade by decade
Silver Bow County, Montana severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Extensive hail damage to homes, roofs, and vehicles reported on Green Acres and Continental Drive near Butte. Hail size ranged between 1.75 and two inches in diameter. In addition, wind gusts were estimated up to 70 mph, which caused some tree branches to break.
The Bert Mooney Airport recorded 1.65 inches of rain in an hour. The 911 dispatch reported manholes being blown from deep water rushing down the streets, a motorhome was pushed into a ditch, and there were multiple reports of water in people's homes.
The Bert Mooney airport located four miles south-southeast of Butte reported a strong west wind gust of 53 mph due to a thunderstorm that moved through. Power companies reported six utility poles on a 50K transmission line down due to the storms in southwest Montana. This caused power outages in Silver Bow county that lasted through the night. The strong winds also caused downed trees in the Butte area.
Context
Risk, population and federal disasters
Very Low
FEMA NRI risk rating
35,785
Population (ACS)
$255K
Median home value
7
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Mar 31, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Sep 13, 2005 | Hurricane | HURRICANE KATRINA EVACUATION | EM |
| Aug 30, 2000 | Fire | WILDFIRES | DR |
| Aug 5, 2000 | Fire | MT-SOUTHWESTERN ZONE TWO FIRE COMPLEX | FM |
| Feb 23, 1996 | Severe Storm | SEVERE STORMS, FLOODING, AND ICE JAMS | DR |
Quick answers
Frequently asked
How many severe weather events have been recorded in Silver Bow County, Montana?
81 events are on record between 1958 and 2025, causing 0 direct deaths and $138K in property damage.
What is the most common severe weather hazard in Silver Bow County?
Hail, with 43 recorded events — 53.1% of everything in the archive for this county.
How many federal disaster declarations cover Silver Bow County?
7 federal disaster declarations from FEMA include Silver Bow County, each tied to a specific incident period.
How risky is Silver Bow County compared with the rest of the country?
FEMA's National Risk Index rates Silver Bow County as very low risk, placing it in the 38 percentile of its state for expected annual loss.
Where does the Silver Bow 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
- Sheridan County 357
- Stillwater County 287
- Sanders County 64
- Sweet Grass County 188
- Rosebud County 600
- Teton County 216
Cite this page
“Silver Bow County, Montana.” Severe Weather History. severeweatherhistory.com/county/montana/silver-bow-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.