Carroll County Natural Disasters and Weather Extremes
The chance of earthquake damage in Carroll County is higher than Virginia average and is lower than the national average. The risk of tornado damage in Carroll County is lower than Virginia average and is much lower than the national average.
Earthquake Index, #6
| Carroll County | 0.71 |
| Virginia | 0.20 |
| 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
| Carroll County | 0.0000 |
| Virginia | 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, #91
| Carroll County | 40.47 |
| Virginia | 88.66 |
| 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 13,418 other weather extremes events within 50 miles of Carroll 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: | 3 | Cold: | 87 | Dense Fog: | 4 | Drought: | 94 |
| Dust Storm: | 0 | Flood: | 1,729 | Hail: | 3,874 | Heat: | 38 | Heavy Snow: | 361 |
| High Surf: | 0 | Hurricane: | 12 | Ice Storm: | 66 | Landslide: | 2 | Strong Wind: | 240 |
| Thunderstorm Winds: | 6,064 | Tropical Storm: | 7 | Wildfire: | 14 | Winter Storm: | 131 | Winter Weather: | 170 |
| Other: | 522 | ||||||||
Volcanos Nearby
No volcano is found in or near Carroll County.
Historical Earthquake Events
A total of 3 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Carroll County.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 48.5 | 1969-11-20 | 4.3 | N/A | 37.4 | -81 |
| 22.4 | 1968-03-08 | 3.9 | N/A | 37 | -80.5 |
| 47.8 | 1974-05-30 | 3.6 | 8 | 37.38 | -80.42 |
Historical Tornado Events
A total of 6 historical tornado events that had recorded magnitude of 2 or above found in or near Carroll County.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 10.8 | 1977-08-21 | 2 | 36°44'N / 80°32'W | 1.00 Mile | 30 Yards | 0 | 0 | 25K | 0 | Carroll | |
| 19.7 | 2009-05-08 | 2 | 36°33'N / 81°02'W | 36°32'N / 80°57'W | 5.00 Miles | 200 Yards | 0 | 6 | 200K | 0K | Alleghany |
| Brief Description: EVENT NARRATIVE: A low end EF-2 tornado touched down on Osee Road and was intermittently on the ground approximately 5 miles moving east-southeast, finally lifting between Old Barrett Road and Glade Valley Road. A single wide mobile home was destroyed on Osee Road, causing four injuries. Along the track, cement silos were collapsed, 5 other homes were damaged, and several other structures were heavily damaged. Two people received minor injuries when struck by debris after winds blew out windows in their home. Monetary damages are estimates. EPISODE NARRATIVE: A thunderstorm complex over Kentucky and Tennessee moved east into the area during the evening of May 8th. The storm environment was such that storms would have rotation due to strong wind shear, and a low level boundary in place. Supercells developed over southeast Kentucky and moved southeast into far southwest Virginia and into northwest North Carolina during the late evening of May 8th. One storm produced an EF-2 tornado in Northern Alleghany County, with another brief EF-1 tornado touching down just south of the EF-2 track. | |||||||||||
| 43.6 | 2004-09-17 | 2 | 36°43'N / 79°57'W | 36°49'N / 79°56'W | 7.10 Miles | 440 Yards | 0 | 4 | 53.8M | 0 | Henry |
| Brief Description: A tornado touched down near Fieldale at 1104 EST. The F1 tornado crossed U.S. Highway 220 turning over 2 tractor-trailer trucks and 2 passenger vehicles. All 4 drivers suffered minor injuries. The tornado damage patch widened to a quarter mile, and strengthened to F2 as it approached and struck a factory. At this location, around 40 vehicles were severely damaged or destroyed. The factory experienced significant damage. The tornado then proceeded north and entered a residential subdivision, but only minor roof and tree damage occurred here. The tornado path became intermittent as it continued north and the damage was limited to trees. The tornado crossed into Franklin County at 1114 EST. | |||||||||||
| 46.8 | 1964-07-12 | 2 | 36°42'N / 79°53'W | 2.00 Miles | 50 Yards | 0 | 3 | 250K | 0 | Henry | |
| 48.8 | 2005-07-07 | 2 | 36°00'N / 80°45'W | 36°03'N / 80°43'W | 3.50 Miles | 200 Yards | 0 | 0 | 2.0M | 400K | Iredell |
| Brief Description: This tornado touched down in the Houstonville Rd area and tracked almost due north. Extensive damage was done to a dairy farm in the Houstonville community, with damage to several other agricultural buildings in the area. In the Misty Rd, Anthony Rd area, the roof was torn off a mobile home as well as another home. The tornado continued to track north, crossing into Yadkin County around Tobacco Rd. At least 13 structures were damaged or destroyed in the county. In addition to the structural damage, damage to tobacco and corn crops was extensive. In addition, numerous trees were blown down along highway 21 and Hunting Creek Rd west of the tornado track. It is unclear whether this was a secondary spin-up or straight-line wind. | |||||||||||
| 49.7 | 1989-05-05 | 2 | 36°08'N / 80°13'W | 36°12'N / 80°08'W | 5.50 Miles | 100 Yards | 0 | 10 | 2.5M | 0 | Forsyth |
* 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.