Graham County Natural Disasters and Weather Extremes
The chance of earthquake damage in Graham County is about the same as North Carolina average and is lower than the national average. The risk of tornado damage in Graham County is lower than North Carolina average and is much lower than the national average.
Earthquake Index, #12
| Graham County | 0.33 |
| North Carolina | 0.18 |
| 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
| Graham County | 0.0000 |
| North Carolina | 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, #87
| Graham County | 62.02 |
| North Carolina | 115.21 |
| 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 15,581 other weather extremes events within 50 miles of Graham 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: | 0 | Cold: | 31 | Dense Fog: | 7 | Drought: | 122 |
| Dust Storm: | 0 | Flood: | 1,159 | Hail: | 4,424 | Heat: | 27 | Heavy Snow: | 87 |
| High Surf: | 0 | Hurricane: | 11 | Ice Storm: | 42 | Landslide: | 0 | Strong Wind: | 100 |
| Thunderstorm Winds: | 8,443 | Tropical Storm: | 20 | Wildfire: | 4 | Winter Storm: | 93 | Winter Weather: | 77 |
| Other: | 934 | ||||||||
Volcanos Nearby
No volcano is found in or near Graham County.
Historical Earthquake Events
A total of 4 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Graham County.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 32.0 | 1973-11-30 | 4.7 | 3 | 35.8 | -83.96 |
| 31.8 | 1979-08-13 | 3.7 | 5 | 35.24 | -84.38 |
| 32.9 | 1982-09-24 | 3.5 | 8 | 35.68 | -84.25 |
| 33.5 | 1977-07-27 | 3.5 | 7 | 35.42 | -84.42 |
Historical Tornado Events
A total of 27 historical tornado events that had recorded magnitude of 2 or above found in or near Graham County.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 5.1 | 1974-04-03 | 2 | 35°16'N / 83°59'W | 35°20'N / 83°49'W | 10.50 Miles | 33 Yards | 2 | 11 | 250K | 0 | Graham |
| 7.4 | 1974-04-03 | 2 | 35°20'N / 83°49'W | 35°23'N / 83°35'W | 13.60 Miles | 33 Yards | 0 | 0 | 3K | 0 | Swain |
| 24.6 | 1974-04-03 | 4 | 34°58'N / 84°13'W | 35°09'N / 83°57'W | 18.90 Miles | 33 Yards | 4 | 26 | 25.0M | 0 | Cherokee |
| 25.2 | 2010-04-25 | 2 | 35°37'N / 84°08'W | 1.00 Mile | 100 Yards | 0 | 0 | 20K | 0K | Blount | |
| Brief Description: EVENT NARRATIVE: The NWS storm survey determined a tornado tracked from Loudon County for one-half of a mile along Thompson Bridge road. It was classified as an EF2 tornado with winds estimated at 110 mph with a path width of 100 yards. EPISODE NARRATIVE: A strong low pressure system along with an associated cold front tracked across the area triggering thunderstorms during the evening and overnight hours. A tornado touched down in eastern Monroe County, then tracked across southern Loudon County and finally dissipated in western Blount County. Another weak tornado touched down briefly in Polk County. | |||||||||||
| 27.6 | 1980-04-28 | 2 | 35°15'N / 84°20'W | 35°16'N / 84°17'W | 3.30 Miles | 50 Yards | 0 | 1 | 250K | 0 | Monroe |
| 28.7 | 1974-04-03 | 2 | 35°40'N / 84°10'W | 35°40'N / 84°09'W | 0 | 2 | 250K | 0 | Loudon | ||
| 30.4 | 1974-04-03 | 2 | 35°47'N / 83°55'W | 0.50 Mile | 50 Yards | 0 | 2 | 250K | 0 | Blount | |
| 31.4 | 1974-04-03 | 2 | 35°31'N / 84°21'W | 1.00 Mile | 200 Yards | 0 | 0 | 250K | 0 | Monroe | |
| 36.1 | 1974-04-03 | 4 | 34°57'N / 84°18'W | 34°58'N / 84°13'W | 5.10 Miles | 400 Yards | 0 | 0 | 2.5M | 0 | Fannin |
| 36.5 | 1974-04-03 | 2 | 34°58'N / 83°23'W | 0.30 Mile | 20 Yards | 0 | 0 | 250K | 0 | Rabun | |
| 37.5 | 1976-06-28 | 2 | 35°19'N / 83°10'W | 0.20 Mile | 10 Yards | 0 | 0 | 250K | 0 | Jackson | |
| 39.5 | 1984-05-07 | 2 | 35°44'N / 84°21'W | 1.00 Mile | 70 Yards | 0 | 0 | 250K | 0 | Loudon | |
| 40.4 | 1965-04-15 | 2 | 35°52'N / 84°05'W | 35°57'N / 84°00'W | 7.40 Miles | 200 Yards | 0 | 6 | 2.5M | 0 | Knox |
| 41.5 | 1952-02-29 | 2 | 35°18'N / 84°40'W | 35°27'N / 84°28'W | 15.30 Miles | 587 Yards | 0 | 0 | 250K | 0 | Mcminn |
| 43.0 | 1974-04-03 | 3 | 35°16'N / 84°38'W | 35°19'N / 84°33'W | 6.10 Miles | 500 Yards | 0 | 50 | 250K | 0 | Mcminn |
| 44.6 | 1974-04-08 | 3 | 35°26'N / 84°37'W | 2.00 Miles | 440 Yards | 0 | 1 | 250K | 0 | Mcminn | |
| 44.9 | 1986-02-06 | 3 | 35°18'N / 84°39'W | 35°17'N / 84°36'W | 3.00 Miles | 270 Yards | 0 | 0 | 2.5M | 0 | Mcminn |
| 45.3 | 2005-08-29 | 2 | 34°40'N / 83°42'W | 34°44'N / 83°43'W | 5.00 Miles | 300 Yards | 0 | 0 | 3.0M | 0 | White |
| Brief Description: A damage survey conducted by the National Weather Service in cooperation with the White County Emergency Management Director and the White County Sheriff concluded that an F2 tornado had carved a five mile long path of destruction, roughly parallel to Georgia Highway 75, causing major destruction to the town of Helen. Extensive damage was reported to several business in downtown Helen, a Bavarian tourist town in the northeast Georgia mountains. The entire second floor was ripped off the Helen Econo Lodge by the tornado. A nearby chapel was completely destroyed. The roof of Hansel & Gretel's Candy Kitchen, the Alpine Village Shoppes, as well as that of a nearby barbecue company were all ripped off by the tornadic winds. A Circle K grocery store also suffered significant damage. Hundreds of trees were also down. One resident reported losing 200 trees just at his property. Georgia Highway 75 was completely blocked on both the north and south side of Helen from downed trees. Many power lines were also down in the area and power was out to much of the area for at least two days. | |||||||||||
| 45.4 | 1963-03-19 | 2 | 35°27'N / 84°39'W | 35°29'N / 84°36'W | 3.60 Miles | 200 Yards | 0 | 1 | 25K | 0 | Mcminn |
| 45.5 | 1974-04-03 | 2 | 34°49'N / 84°21'W | 34°51'N / 84°19'W | 3.00 Miles | 200 Yards | 0 | 2 | 2.5M | 0 | Fannin |
| 46.5 | 1986-02-06 | 3 | 35°14'N / 84°39'W | 35°18'N / 84°39'W | 2.00 Miles | 270 Yards | 0 | 0 | 2.5M | 0 | Polk |
| 47.6 | 1973-12-13 | 2 | 35°11'N / 84°39'W | 0.80 Mile | 880 Yards | 0 | 3 | 250K | 0 | Polk | |
| 47.7 | 1974-04-03 | 3 | 35°13'N / 84°42'W | 35°16'N / 84°38'W | 5.40 Miles | 500 Yards | 1 | 0 | 250K | 0 | Polk |
| 48.6 | 1974-04-03 | 3 | 35°14'N / 84°42'W | 35°15'N / 84°40'W | 2.70 Miles | 350 Yards | 0 | 0 | 3K | 0 | Polk |
| 49.1 | 1953-05-02 | 2 | 36°02'N / 84°04'W | 0.80 Mile | 100 Yards | 0 | 0 | 3K | 0 | Anderson | |
| 49.3 | 1993-02-21 | 2 | 35°47'N / 84°34'W | 35°45'N / 84°31'W | 10.00 Miles | 100 Yards | 0 | 0 | 500K | 0 | Blount And Loudon |
| Brief Description: The tornado that went through Loudon County continued across Blount County through the town of Friendsville and ending just west of Maryville. One large home was destroyed and several other were damaged. Numerous trees were snapped. | |||||||||||
| 50.0 | 1992-11-22 | 3 | 34°34'N / 83°56'W | 34°41'N / 83°48'W | 10.00 Miles | 867 Yards | 1 | 7 | 2.5M | 0 | Lumpkin |
* 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.