Harrold, SD Natural Disasters and Weather Extremes
The chance of earthquake damage in Harrold is about the same as South Dakota average and is much lower than the national average. The risk of tornado damage in Harrold is lower than South Dakota average and is much lower than the national average.
Earthquake Index, #178
| Harrold, SD | 0.03 |
| 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
| Harrold, SD | 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, #344
| Harrold, SD | 58.43 |
| 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 1,491 other weather extremes events within 50 miles of Harrold, SD 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: | 0 | Cold: | 0 | Dense Fog: | 0 | Drought: | 0 |
| Dust Storm: | 0 | Flood: | 57 | Hail: | 859 | Heat: | 0 | Heavy Snow: | 0 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 1 |
| Thunderstorm Winds: | 553 | Tropical Storm: | 0 | Wildfire: | 3 | Winter Storm: | 0 | Winter Weather: | 0 |
| Other: | 18 | ||||||||
Volcanos Nearby
No volcano is found in or near Harrold, SD.
Historical Earthquake Events
A total of 1 historical earthquake event that had a recorded magnitude of 3.5 or above found in or near Harrold, SD.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 27.1 | 1983-03-04 | 4.6 | 5 | 44.21 | -99.41 |
Historical Tornado Events
A total of 22 historical tornado events that had recorded magnitude of 2 or above found in or near Harrold, SD.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 13.9 | 1992-06-30 | 2 | 44°22'N / 99°55'W | 0.30 Mile | 30 Yards | 0 | 0 | 25K | 0 | Hughes | |
| 24.9 | 1971-10-01 | 2 | 44°43'N / 100°10'W | 0.50 Mile | 300 Yards | 0 | 0 | 25K | 0 | Sully | |
| 30.0 | 1971-07-03 | 3 | 44°16'N / 99°14'W | 44°15'N / 99°17'W | 0 | 0 | 25K | 0 | Hand | ||
| 31.2 | 1971-07-09 | 3 | 44°05'N / 99°36'W | 0 | 0 | 0K | 0 | Lyman | |||
| 32.4 | 1973-07-23 | 3 | 44°21'N / 100°21'W | 2.50 Miles | 500 Yards | 0 | 10 | 2.5M | 0 | Hughes | |
| 34.3 | 1968-06-20 | 2 | 44°22'N / 100°24'W | 0 | 0 | 0K | 0 | Stanley | |||
| 34.7 | 1983-09-02 | 2 | 44°48'N / 99°09'W | 0.20 Mile | 10 Yards | 0 | 0 | 25K | 0 | Hand | |
| 35.4 | 1983-09-02 | 2 | 44°54'N / 99°15'W | 0.20 Mile | 10 Yards | 0 | 0 | 3K | 0 | Hand | |
| 35.6 | 1987-08-05 | 2 | 44°01'N / 99°52'W | 1.20 Miles | 80 Yards | 0 | 0 | 250K | 0 | Lyman | |
| 36.0 | 1992-06-16 | 3 | 44°03'N / 99°26'W | 2.00 Miles | 73 Yards | 0 | 8 | 25.0M | 0 | Buffalo | |
| 36.4 | 2006-08-24 | 2 | 44°31'N / 99°04'W | 44°30'N / 98°56'W | 5.00 Miles | 300 Yards | 0 | 0 | 0 | 0 | Hand |
| Brief Description: A supercell thunderstorm on its southeast track produced a fourth tornado in Hand county. This tornado touched down west of Miller. The tornado destroyed a large barn and a car was moved nearly 20 feet. Well built structures were heavily damaged and several were pushed slightly off of their foundations. Significant tree damage also occurred. | |||||||||||
| 39.9 | 1955-04-19 | 2 | 45°01'N / 99°56'W | 45°10'N / 99°51'W | 10.80 Miles | 67 Yards | 0 | 0 | 0K | 0 | Potter |
| 43.3 | 1971-07-03 | 2 | 44°13'N / 99°00'W | 44°14'N / 98°56'W | 2.30 Miles | 100 Yards | 0 | 0 | 25K | 0 | Hand |
| 44.6 | 1971-07-09 | 3 | 43°53'N / 99°37'W | 0 | 2 | 0K | 0 | Lyman | |||
| 45.3 | 1955-04-19 | 2 | 45°01'N / 100°07'W | 45°16'N / 99°59'W | 18.20 Miles | 27 Yards | 0 | 0 | 3K | 0 | Potter |
| 45.4 | 1966-07-26 | 2 | 45°00'N / 99°06'W | 0 | 0 | 3K | 0 | Faulk | |||
| 46.1 | 1957-06-09 | 3 | 45°02'N / 99°08'W | 1.00 Mile | 33 Yards | 0 | 0 | 25K | 0 | Faulk | |
| 47.1 | 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 |
| 48.0 | 1973-04-19 | 2 | 44°55'N / 98°54'W | 44°57'N / 99°00'W | 4.90 Miles | 27 Yards | 0 | 0 | 3K | 0 | Faulk |
| 48.4 | 1970-07-18 | 2 | 45°06'N / 100°18'W | 0 | 0 | 0K | 0 | Potter | |||
| 48.5 | 1964-06-18 | 2 | 45°12'N / 99°49'W | 45°15'N / 99°47'W | 2.70 Miles | 200 Yards | 0 | 0 | 25K | 0 | Potter |
| 49.7 | 2001-07-18 | 2 | 45°15'N / 99°40'W | 45°14'N / 99°40'W | 1.00 Mile | 100 Yards | 0 | 0 | 0 | 0 | Edmunds |
| Brief Description: A tornado touched down and heavily damaged a house. The attached garage was totally destroyed with two vehicles badly damaged. The metal roof was ripped off of the barn with three outbuildings destroyed. Five telephone/power poles were broken off with 1/2 to 3/4 of a mile of power lines down. Also, a small windmill was wrapped around a power pole. | |||||||||||
* 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.