NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Anaconda, 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 Anaconda, Montana since records began in 1851. Since 1950, 4 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 4
- 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 Anaconda
The strongest of the 4 tornadoes within 25 miles was an F1 on June 28, 1982; its path came within 24 miles. The most recent tornado was on September 15, 1997. Of the 73 Montana cities on this site, 42% have more tornadoes within 25 miles than Anaconda. Hail has been reported within 10 miles 16 times since 1959, with stones up to 1.75 inches (golf ball size). Of the 73 Montana cities, 63% have more hail reports within 10 miles than Anaconda.
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Tornadoes within 25 miles of Anaconda
By decade
- 1990s1
- 1980s2
- 1960s1
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 28, 1982 | F1 | 24 mi | 0.5 mi | 0 / 0 |
| Sep 15, 1997 | F0 | 8 mi | 0.1 mi | 0 / 0 |
| Aug 11, 1988 | F0 | 22 mi | 2 mi | 0 / 0 |
| May 17, 1962 | F0 | 20 mi | 0.1 mi | 0 / 0 |
The strongest 4 of 4, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Anaconda
The Storm Prediction Center has 16 hail reports within 10 miles of Anaconda since 1959, made on 13 separate days. Of these, 9 were 1 inch across or larger, and none reached 2 inches. The largest, 1.75 inches (golf ball size), fell on June 16, 2005. The most recent report is from July 27, 2023. July has the most reports, 6.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Anaconda
The nearest NOAA station with 1991–2020 climate normals is Anaconda, MT, 3 miles east of Anaconda at 5,230 feet. July is the warmest, with an average high of 83°F and low of 49°F; December is the coolest, at 34°F and 15°F. June is the wettest at 2.2 inches of precipitation on average and January the driest at 0.6 inches; the year adds up to 15.0 inches over 45 days with at least a tenth of an inch. Highs reach 90°F on about 10 days a year, almost all from July to August. Lows fall below freezing on about 201 nights a year. Snowfall averages 75.1 inches a year, most of it in November and December. That 15.0 inches is more than at 35 of the 58 Montana stations used on this site (60%). Butte, 25 miles southeast, has its own station (Butte Bert Mooney Airport, MT): 12.7 inches a year, 2.3 less than here, and a July average high of 81°F against 83°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 37 | 16 | 0.6 | 2 | 11.4 |
| Feb | 39 | 16 | 1.0 | 2 | 11.3 |
| Mar | 48 | 23 | 1.2 | 4 | 11.8 |
| Apr | 55 | 28 | 1.5 | 4 | 9.9 |
| May | 64 | 36 | 2.1 | 6 | 2.0 |
| Jun | 73 | 43 | 2.2 | 7 | 0.6 |
| Jul | 83 | 49 | 1.3 | 4 | 0.0 |
| Aug | 82 | 47 | 1.2 | 4 | 0.2 |
| Sep | 72 | 40 | 1.2 | 3 | 0.4 |
| Oct | 57 | 31 | 1.0 | 4 | 3.3 |
| Nov | 43 | 21 | 1.0 | 3 | 12.1 |
| Dec | 34 | 15 | 0.7 | 2 | 12.1 |
| Year | 57 | 30 | 15.0 | 45 | 75.1 |
Averages for 1991–2020 at Anaconda, MT (5,230 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 Anaconda
Since 1996, the National Weather Service has logged 14 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Anaconda: 6 thunderstorm wind reports, 4 heavy rain events, 2 floods, 1 flash flood and 1 lightning strike. They killed 0 people and injured 2, and the NWS estimated $729,000 in property and crop damage. The strongest thunderstorm gust on record here was 70 mph, on August 6, 1998.
July 11, 1998: thunderstorm wind 2 miles from the centre of Anaconda — 2 injured.
July 15, 2017: flash flood 2 miles from the centre of Anaconda — $685,000 damage.
NWS: “75 of rain in 20 to 25 minutes. Multiple homes experienced flooded basements, man hole covers were lifted off and floated down roads, and Westhill Park road was flooded with a depth of up to 4 feet.”
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
Flood insurance policyholders in Anaconda's ZIP code 59711 have filed 10 claims with the National Flood Insurance Program since 1980, and were paid $8,284 for buildings and contents, in the dollars of each year. Of the 26 Montana cities on this site with 10 or more claims, 0 have fewer than Anaconda.
Deer Lodge County, which includes Anaconda, has been named in 10 federal disaster or emergency declarations since 1974, 7 of them major disasters (by incident: 3 severe storms, 2 biological emergencies, 2 fires, 2 floods). The latest major disaster declaration was Covid-19 Pandemic, on March 31, 2020. FEMA's National Risk Index gives Deer Lodge 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 $5.9 million a year, the 34th highest of 56 Montana counties; of the hazards above, the largest share, $1.2 million (21%), 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 Anaconda
- Deer Lodge, MT21 mi
- Butte, MT25 mi
- Whitehall, MT44 mi
- Boulder, MT44 mi
- Corvallis, MT52 mi
- Clancy, MT54 mi
- Hamilton, MT56 mi
- Stevensville, MT57 mi
- Helena, MT58 mi
- Victor, MT60 mi
- East Helena, MT61 mi
- Bonner, MT61 mi
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