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Tornado in Valley County, Montana
44 tornadoes events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Tornado.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 44 tornado events in Valley County, Montana, between 1950 and 2026, spread over 24 years.
July is the busiest month, with 22 of the recorded events. The last 20 years account for 11 events against 22 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 10.2% of the 432 tornado events recorded in Montana; its 0.9 per 100 square miles compares with 0.3 statewide.
By rating: 29 at (E)F0, 5 at (E)F1, 5 at (E)F2, 0 at (E)F3, 0 at (E)F4, 0 at (E)F5 and 5 unrated. Tornadoes before 2007 carry the original Fujita rating.
Compared with Montana
| Measure | Valley County | Montana | US |
|---|---|---|---|
| Tornado events since 1950 | 44 | 432 | 81,281 |
| Per 100 square miles | 0.9 | 0.3 | 2.3 |
| Per 10,000 residents | 58.4 | 3.9 | 2.4 |
| Deaths recorded | 0 | 4 | 6,410 |
| Busiest month | July | June | May |
By year
Seasonality
0Feb
0Mar
0Apr
0May
1Jun
14Jul
22Aug
7Sep
0Oct
0Nov
0Dec
0
Magnitude distribution
Enhanced Fujita scale wind estimates
- EF0/F0
- 65–85 mph (EF0)
- EF1/F1
- 86–110 mph (EF1)
- EF2/F2
- 111–135 mph (EF2)
- EF3/F3
- 136–165 mph (EF3)
- EF4/F4
- 166–200 mph (EF4)
- EF5/F5
- over 200 mph (EF5)
- Unrated
- no rating recorded
Tornado rating as recorded (Fujita scale before February 2007, Enhanced Fujita after).
Recorded events
All 44 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 12 Jul 2024 | Tornado | EF0 | — | — | — | — | County |
| 12 Jul 2024 | Tornado | EF0 | — | — | — | — | County |
| 12 Jul 2024 | Tornado | EF0 | — | — | — | — | County |
| 9 Jun 2023 | Tornado | EF unrated | — | — | — | — | County |
| 18 Jul 2022 | Tornado | EF2 | — | — | — | — | County |
| 20 May 2020 | Tornado | EF0 | — | — | — | — | County |
| 29 Jun 2011 | Tornado | EF0 | — | — | — | — | County |
| 21 Jun 2010 | Tornado | EF0 | — | — | — | — | County |
| 13 Jul 2009 | Tornado | EF0 | — | — | — | — | County |
| 13 Jul 2009 | Tornado | EF0 | — | — | — | — | County |
| 10 Aug 2007 | Tornado | EF1 | $10K | — | — | — | County |
| 8 Jul 2002 | Tornado | F0 | $10K | — | — | — | County |
| 8 Jul 2002 | Tornado | F0 | — | — | — | — | County |
| 8 Jul 2002 | Tornado | F0 | $100K | — | — | — | County |
| 20 Jul 2001 | Tornado | F0 | — | — | — | — | County |
| 10 Jul 2000 | Tornado | F0 | — | — | — | — | County |
| 3 Jul 2000 | Tornado | F0 | — | — | — | — | County |
| 2 Jul 2000 | Tornado | F0 | — | — | — | — | County |
| 7 Jun 2000 | Tornado | F0 | — | — | — | — | County |
| 21 Jun 1999 | Tornado | F0 | — | — | — | — | County |
| 21 Jun 1999 | Tornado | F1 | $250K | — | — | — | County |
| 17 Jul 1997 | Tornado | F0 | — | — | — | — | County |
| 26 Aug 1995 | Tornado | F0 | — | — | — | — | County |
| 26 Aug 1995 | Tornado | F0 | — | — | — | — | County |
| 26 Aug 1995 | Tornado | — | — | — | — | — | County |
| 22 Jun 1995 | Tornado | F0 | — | — | — | — | County |
| 6 Jun 1995 | Tornado | F0 | — | — | — | — | County |
| 18 Aug 1989 | Tornado | F0 | — | — | — | — | County |
| 5 Jul 1988 | Tornado | F0 | — | — | — | — | County |
| 5 Jul 1988 | Tornado | F0 | — | — | — | — | County |
| 5 Jul 1988 | Tornado | F0 | — | — | — | — | County |
| 5 Jul 1988 | Tornado | F0 | — | — | — | — | County |
| 5 Jul 1988 | Tornado | F0 | — | — | — | — | County |
| 10 Jul 1983 | Tornado | F1 | $3K | — | — | — | County |
| 4 Jul 1978 | Tornado | — | — | — | — | — | County |
| 25 Jun 1975 | Tornado | F0 | — | — | — | — | County |
| 25 Jun 1975 | Tornado | F2 | — | — | — | — | County |
| 25 Jun 1975 | Tornado | F2 | $25K | — | — | — | County |
| 11 Jun 1972 | Tornado | F1 | — | — | — | — | County |
| 11 Jun 1972 | Tornado | F2 | $3K | — | — | — | County |
| 6 Aug 1970 | Tornado | F1 | $250 | — | — | — | County |
| 4 Aug 1962 | Tornado | F2 | $250K | — | — | — | County |
| 18 Jun 1958 | Tornado | — | $250 | — | — | — | County |
| 9 Jul 1954 | Tornado | — | $250 | — | — | — | County |
Questions and answers
How many tornado events has Valley County had?
44 events in the NCEI Storm Events record between 1950 and 2026. Reporting of tornadoes became far more complete after 1996, so early decades undercount.
When was the last recorded tornado event in Valley County?
12 Jul 2024 (Tornado, EF0). Records reach NCEI about 120 days after the month ends.
What was the most damaging tornado event recorded in Valley County?
The tornado of 4 Aug 1962, with property damage estimated by NCEI at $250K.
How does Valley County compare with Montana for tornado?
0.9 events per 100 square miles against 0.3 statewide; the county holds 44 of the state's 432 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Tornado hub and the county page.