NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Ennis, MT
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Ennis, Montana since records began in 1851. Since 1950, 2 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 2
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Ennis
The highest rating among the 2 tornadoes within 25 miles is F0, reached 2 times; the most recent, on June 29, 1999, came within 5 miles. Of the 73 Montana cities on this site, 73% have more tornadoes within 25 miles than Ennis. Hail has been reported within 10 miles 5 times since 1968, with stones up to 1.25 inches (half dollar size). Of the 73 Montana cities, 92% have more hail reports within 10 miles than Ennis.
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Tornadoes within 25 miles of Ennis
By decade
- 1990s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 29, 1999 | F0 | 5 mi | 0.2 mi | 0 / 0 |
| Jun 29, 1992 | F0 | 11 mi | 0.1 mi | 0 / 0 |
The strongest 2 of 2, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Ennis
The Storm Prediction Center has 5 hail reports within 10 miles of Ennis since 1968. Of these, 3 were 1 inch across or larger, and none reached 2 inches. The largest, 1.25 inches (half dollar size), fell on August 18, 2007. The most recent report is from June 30, 2024.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Ennis
The nearest NOAA station with 1991–2020 climate normals is Ennis, MT, 2 miles north of Ennis at 4,953 feet. July is the warmest, with an average high of 83°F and low of 46°F; December is the coolest, at 33°F and 15°F. Highs reach 90°F on about 13 days a year, almost all from July to August. Lows fall below freezing on about 186 nights a year. Snowfall averages 44.7 inches a year, most of it in February. That 12.9 inches is more than at 14 of the 58 Montana stations used on this site (24%). Gallatin Gateway, 26 miles east, has its own station (Big Sky 2WNW, MT): 23.3 inches a year, 10.4 more than here, and a July average high of 78°F against 83°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 34 | 15 | 0.5 | 1 | 6.5 |
| Feb | 37 | 15 | 0.5 | 2 | 7.6 |
| Mar | 46 | 22 | 0.8 | 3 | 6.6 |
| Apr | 55 | 28 | 1.5 | 5 | 6.0 |
| May | 64 | 35 | 1.9 | 6 | 1.3 |
| Jun | 73 | 41 | 2.2 | 6 | 0.2 |
| Jul | 83 | 46 | 1.2 | 4 | 0.0 |
| Aug | 82 | 44 | 1.0 | 4 | 0.0 |
| Sep | 72 | 37 | 1.0 | 3 | 0.1 |
| Oct | 58 | 29 | 1.1 | 3 | 2.2 |
| Nov | 43 | 22 | 0.7 | 2 | 6.9 |
| Dec | 33 | 15 | 0.5 | 2 | 7.3 |
| Year | 57 | 29 | 12.9 | 40 | 44.7 |
Averages for 1991–2020 at Ennis, MT (4,953 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Ennis
Since 1996, the National Weather Service has logged 26 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Ennis: 18 thunderstorm wind reports, 6 floods and 2 heavy rain events. The strongest thunderstorm gust on record here was 85 mph, on July 22, 2008.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Madison County, which includes Ennis, has been named in 7 federal disaster or emergency declarations since 1997, 4 of them major disasters (by incident: 2 biological emergencies, 2 fires, 2 severe storms, 1 hurricane). The latest major disaster declaration was Covid-19 Pandemic, on March 31, 2020. FEMA's National Risk Index gives Madison County a Very Low rating for natural hazard risk overall; by hazard: Relatively Low for lightning; Very Low for tornadoes, hail, inland flooding, strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $15.3 million a year, the 14th highest of 56 Montana counties; of the hazards above, the largest share, $4.1 million (27%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Ennis
- Gallatin Gateway, MT26 mi
- Manhattan, MT39 mi
- Bozeman, MT41 mi
- Three Forks, MT42 mi
- Whitehall, MT44 mi
- Belgrade, MT45 mi
- Dillon, MT53 mi
- Butte, MT62 mi
- Boulder, MT65 mi
- Townsend, MT76 mi
- Clancy, MT82 mi
- Anaconda, MT85 mi
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