Twin Mountain, NH Natural Disasters and Weather Extremes
The chance of earthquake damage in Twin Mountain is lower than New Hampshire average and is much lower than the national average. The risk of tornado damage in Twin Mountain is lower than New Hampshire average and is much lower than the national average.
Earthquake Index, #235
| Twin Mountain, NH | 0.22 |
| New Hampshire | 1.01 |
| 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
| Twin Mountain, NH | 0.0000 |
| New Hampshire | 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, #250
| Twin Mountain, NH | 15.64 |
| New Hampshire | 65.04 |
| 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 1,530 other weather extremes events within 50 miles of Twin Mountain, NH 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: | 1 | Cold: | 29 | Dense Fog: | 1 | Drought: | 1 |
| Dust Storm: | 0 | Flood: | 190 | Hail: | 243 | Heat: | 7 | Heavy Snow: | 29 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 1 | Landslide: | 0 | Strong Wind: | 42 |
| Thunderstorm Winds: | 599 | Tropical Storm: | 0 | Wildfire: | 0 | Winter Storm: | 127 | Winter Weather: | 70 |
| Other: | 190 | ||||||||
Volcanos Nearby
No volcano is found in or near Twin Mountain, NH.
Historical Earthquake Events
A total of 3 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Twin Mountain, NH.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 39.0 | 1940-12-24 | 5.6 | N/A | 43.75 | -71.25 |
| 40.4 | 1940-12-20 | 5.6 | N/A | 43.7 | -71.5 |
| 47.5 | 1963-12-04 | 3.7 | 33 | 43.6 | -71.6 |
Historical Tornado Events
A total of 3 historical tornado events that had recorded magnitude of 2 or above found in or near Twin Mountain, NH.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 30.8 | 1966-08-11 | 2 | 44°00'N / 72°06'W | 44°04'N / 71°56'W | 9.00 Miles | 100 Yards | 0 | 0 | 250K | 0 | Grafton |
| 45.7 | 2008-07-24 | 2 | 43°34'N / 71°07'W | 43°51'N / 70°59'W | 20.00 Miles | 880 Yards | 0 | 0 | 0K | 0K | Carroll |
| Brief Description: EVENT NARRATIVE: An E-F2 tornado moving out of Strafford County crossed into Carroll 2.9 miles east of South Wolfboro and continued to skip north northeast for almost 20 miles through the town of Freedom. F0 to F2 damage occurred along the path of the storm and many thousands of trees were blown down. Cars, homes and other structures were also damaged. EPISODE NARRATIVE: On July 24th a closed 500 mb low was digging over NY/PA and waves of surface low pressure were riding north along the associated surface front to the west of the forecast area. A strong 50kt low level jet was also riding northward ahead of the front. This resulted in extremely high helicity values across southern and central New Hampshire. A surface dew point boundary was in place across south central New Hampshire with readings in the lower 70s to the east of this boundary and in the mid 60s to the west. Sunshine began breaking out to the east of this boundary by mid morning and convection began developing by late morning. Storms grew rapidly and quickly began rotating. A tornado rated as strong as F2 cut a 50 mile path through 5 counties in southeast New Hampshire resulting in 1 fatality and damage to over 100 structures some of which were completely destroyed. | |||||||||||
| 49.6 | 1963-07-18 | 2 | 43°36'N / 71°12'W | 0.10 Mile | 17 Yards | 0 | 0 | 25K | 0 | Carroll | |
* 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.