NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Chaska, MN
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 Chaska, Minnesota since records began in 1851. Since 1950, 109 tornadoes have touched down within 25 miles, 10 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 109
- EF3 or stronger
- 10
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
23 deaths in all
What the records show for Chaska
The highest rating among the 109 tornadoes within 25 miles is F4, reached 5 times; the most recent, on May 6, 1965, came within 7 miles. The deadliest, an F4 on May 6, 1965, killed 6 people. Of the 109, 5 had paths within 5 miles of the city centre, and 57 have come since 2000. May has had the most tornadoes, 31. The most recent tornado was on June 28, 2025. Chaska has more tornadoes within 25 miles than 84% of the 341 Minnesota cities on this site. Hail has been reported within 10 miles 243 times since 1962, with stones up to 3.25 inches. Chaska has more hail reports within 10 miles than 87% of the 341 Minnesota cities.
Compare Chaska's storm record with another city →
Tornadoes within 25 miles of Chaska
By decade
- 2020s20
- 2010s19
- 2000s18
- 1990s16
- 1980s14(3 EF3+)
- 1970s5
- 1960s13(5 EF3+)
- 1950s4(2 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 6, 1965 | F4 | 16 mi | 17.3 mi | 6 / 158 |
| May 6, 1965 | F4 | 22 mi | 6.8 mi | 3 / 175 |
| May 6, 1965 | F4 | 7 mi | 12.3 mi | 3 / 175 |
| Jun 19, 1951 | F4 | 20 mi | 52.6 mi | 1 / 20 |
| May 6, 1965 | F4 | 5 mi | 6.9 mi | 0 / 0 |
| Jul 20, 1951 | F3 | 10 mi | 11.6 mi | 5 / 40 |
| Apr 26, 1984 | F3 | 24 mi | 5.5 mi | 1 / 52 |
| Jun 14, 1981 | F3 | 17 mi | 16.2 mi | 1 / 83 |
| Jul 23, 1987 | F3 | 24 mi | 5 mi | 0 / 0 |
| May 6, 1965 | F3 | 23 mi | 15.5 mi | 0 / 0 |
| May 6, 1965 | F2 | 13 mi | 11.2 mi | 1 / 175 |
| Jul 18, 1986 | F2 | 21 mi | 4 mi | 0 / 0 |
The strongest 12 of 109, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Chaska
The Storm Prediction Center has 243 hail reports within 10 miles of Chaska since 1962, made on 107 separate days. Of these, 130 were 1 inch across or larger, and 21 reached 2 inches. The largest, 3.25 inches, fell on June 16, 2025. The most recent report is from September 21, 2025. June has the most reports, 67.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Chaska
The nearest NOAA station with 1991–2020 climate normals is Chaska 2NW, MN, 1 mile west of Chaska at 923 feet. July is the warmest, with an average high of 83°F and low of 60°F; January is the coolest, at 23°F and 4°F. June is the wettest at 5.3 inches of precipitation on average and January and February the driest at 0.9 inches; the year adds up to 34.2 inches over 61 days with at least a tenth of an inch. Highs reach 90°F on about 11 days a year, almost all from June to September. Lows fall below freezing on about 161 nights a year. Snowfall averages 51.6 inches a year, most of it in December. That 34.2 inches is more than at 101 of the 124 Minnesota stations used on this site (81%). Shakopee, 5 miles southeast, has its own station (Mpls Flying Cloud Airport, MN): 30.8 inches a year, 3.4 less than here, and a July average high of 84°F against 83°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 23 | 4 | 0.9 | 2 | 7.8 |
| Feb | 27 | 7 | 0.9 | 3 | 11.4 |
| Mar | 40 | 19 | 1.7 | 5 | 8.0 |
| Apr | 56 | 33 | 3.2 | 7 | 4.0 |
| May | 68 | 44 | 4.4 | 8 | 0.0 |
| Jun | 78 | 56 | 5.3 | 7 | 0.0 |
| Jul | 83 | 60 | 4.1 | 6 | 0.0 |
| Aug | 80 | 58 | 4.6 | 6 | 0.0 |
| Sep | 73 | 50 | 3.3 | 6 | 0.0 |
| Oct | 58 | 36 | 2.8 | 5 | 0.3 |
| Nov | 41 | 24 | 1.7 | 3 | 3.5 |
| Dec | 28 | 12 | 1.3 | 5 | 16.6 |
| Year | 55 | 34 | 34.2 | 61 | 51.6 |
Averages for 1991–2020 at Chaska 2NW, MN (923 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 Chaska
Since 1996, the National Weather Service has logged 266 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Chaska: 193 thunderstorm wind reports, 43 heavy rain events, 22 flash floods, 7 floods and 1 lightning strike. They killed 0 people and injured 2, and the NWS estimated $26.0 million in property and crop damage. The strongest thunderstorm gust on record here was 83 mph, on July 17, 1997. August has had the most flash floods, 9 of 22. Of the 312 Minnesota cities on this site with a flash flood on record, 281 have had fewer than Chaska.
May 30, 1998: thunderstorm wind 2 miles from the centre of Chaska — 2 injured, $9.2 million damage.
NWS: “Roof torn off building injuring 2. South wall of building center blown out.”
June 18, 2014: flood 7 miles from the centre of Chaska — $9.2 million damage.
May 15, 1998: thunderstorm wind 3 miles from the centre of Chaska — $5.0 million damage.
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 Chaska's ZIP code 55318 have filed 19 claims with the National Flood Insurance Program since 1978, and were paid $33,000 for buildings and contents, in the dollars of each year. 37% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 120 Minnesota cities on this site with 10 or more claims, 39 have fewer than Chaska.
Carver County, which includes Chaska, has been named in 17 federal disaster or emergency declarations since 1965, 13 of them major disasters (by incident: 9 floods, 3 severe storms, 2 biological emergencies, 1 drought). The latest major disaster declaration was Severe Storms and Flooding, on June 28, 2024. FEMA's National Risk Index gives Carver County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively High for strong wind; Relatively Moderate for tornadoes and hail; Relatively Low for inland flooding, lightning and heat waves. It models the county's expected loss from all 18 hazards it covers at $41.4 million a year, the 12th highest of 87 Minnesota counties; of the hazards above, the largest share, $18.0 million (43%), 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.