Mellette County Natural Disasters and Weather Extremes
The chance of earthquake damage in Mellette County is about the same as South Dakota average and is much lower than the national average. The risk of tornado damage in Mellette County is lower than South Dakota average and is much lower than the national average.
Earthquake Index, #24
| Mellette County | 0.04 |
| South Dakota | 0.05 |
| U.S. | 1.81 |
The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.
Volcano Index, #1
| Mellette County | 0.0000 |
| South Dakota | 0.0000 |
| U.S. | 0.0023 |
The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.
Tornado Index, #44
| Mellette County | 54.51 |
| South Dakota | 114.73 |
| U.S. | 136.45 |
The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.
Other Weather Extremes Events
A total of 5,079 other weather extremes events within 50 miles of Mellette County were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 19 | Cold: | 3 | Dense Fog: | 0 | Drought: | 6 |
| Dust Storm: | 0 | Flood: | 130 | Hail: | 3,135 | Heat: | 0 | Heavy Snow: | 23 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 2 | Landslide: | 0 | Strong Wind: | 19 |
| Thunderstorm Winds: | 1,625 | Tropical Storm: | 0 | Wildfire: | 15 | Winter Storm: | 12 | Winter Weather: | 21 |
| Other: | 69 | ||||||||
Volcanos Nearby
No volcano is found in or near Mellette County.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Mellette County.
No historical earthquake events found in or near Mellette County.
Historical Tornado Events
A total of 14 historical tornado events that had recorded magnitude of 2 or above found in or near Mellette County.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 15.1 | 1971-06-04 | 2 | 43°30'N / 100°29'W | 0.30 Mile | 50 Yards | 0 | 0 | 0K | 0 | Mellette | |
| 19.3 | 1961-07-27 | 2 | 43°19'N / 100°39'W | 5.00 Miles | 33 Yards | 0 | 0 | 25K | 0 | Todd | |
| 20.4 | 1971-06-15 | 2 | 43°18'N / 100°39'W | 0 | 1 | 0K | 0 | Todd | |||
| 23.4 | 1973-07-08 | 2 | 43°15'N / 100°50'W | 1.00 Mile | 133 Yards | 0 | 0 | 3K | 0 | Hutchinson | |
| 25.3 | 1971-06-04 | 2 | 43°54'N / 100°30'W | 0 | 0 | 25K | 0 | Jones | |||
| 31.0 | 1979-09-07 | 2 | 43°09'N / 100°55'W | 1.00 Mile | 133 Yards | 0 | 0 | 250K | 0 | Todd | |
| 31.5 | 1953-06-14 | 2 | 43°28'N / 101°30'W | 43°50'N / 101°16'W | 27.70 Miles | 440 Yards | 0 | 0 | 25K | 0 | Davison |
| 31.9 | 1971-06-04 | 2 | 43°55'N / 100°19'W | 0 | 0 | 0K | 0 | Lyman | |||
| 32.9 | 1974-07-02 | 2 | 43°08'N / 100°55'W | 43°05'N / 100°33'W | 18.50 Miles | 100 Yards | 0 | 0 | 250K | 0 | Todd |
| 37.1 | 1960-07-25 | 2 | 43°55'N / 100°17'W | 43°55'N / 100°04'W | 10.40 Miles | 33 Yards | 0 | 0 | 25K | 0 | Lyman |
| 45.6 | 1975-07-19 | 2 | 42°56'N / 100°58'W | 42°55'N / 100°33'W | 20.90 Miles | 33 Yards | 0 | 0 | 2.5M | 0 | Cherry |
| 47.0 | 2003-07-03 | 2 | 43°13'N / 101°35'W | 43°12'N / 101°30'W | 3.00 Miles | 100 Yards | 0 | 0 | 75K | 0 | Bennett |
| Brief Description: A supercell thunderstorm moved southeastward across western Jackson County and Bennett County. The storm dropped up to golf ball sized hail and produced a tornado north of Tuthill. The tornado touched down about a mile north of the junction of highways 18 and 73, where it destroyed a garage. The tornado moved south-southeast and destroyed a mobile home just to the southeast of the highway intersection and then dissipated just north of Tuthill. No one was injured. | |||||||||||
| 47.9 | 1977-07-10 | 2 | 43°00'N / 101°18'W | 43°01'N / 101°17'W | 0 | 0 | 0K | 0 | Bennett | ||
| 48.4 | 1962-06-15 | 3 | 42°56'N / 101°07'W | 0 | 6 | 250K | 0 | Cherry | |||
* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.