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Wyoming Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Wyoming is lower than the national average. The risk of tornado damage in Wyoming is much lower than the national average.

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #24

Wyoming
0.38
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, #12

Wyoming
0.0006
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, #38

Wyoming
30.94
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 5,966 other weather extremes events from 1950 to 2010 were recorded in Wyoming. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:31Blizzard:89Cold:22Dense Fog:15Drought:18
Dust Storm:0Flood:188Hail:2,340Heat:0Heavy Snow:411
High Surf:0Hurricane:0Ice Storm:3Landslide:1Strong Wind:917
Thunderstorm Winds:1,174Tropical Storm:0Wildfire:75Winter Storm:442Winter Weather:11
Other:229 

Volcanos Nearby

A total of 3 volcanoes are found in or near Wyoming.

NameRegionLatitudeLongitudeElevation (foot)TypeStatusLast Eruption
YellowstoneUS-Wyoming, United States44.43-110.672805CalderaTephrochronologyLast known eruption B.C. (Holocene)
DotseroUS-Colorado, United States39.65-107.032230MaarRadiocarbonLast known eruption B.C. (Holocene)
Hell's Half AcreUS-Idaho, United States43.5-112.451631Shield volcanoRadiocarbonLast known eruption B.C. (Holocene)

Historical Earthquake Events

A total of 49 historical earthquake events that had recorded magnitudes of 3.5 or above found in Wyoming.

DateMagnitudeDepth (km)LatitudeLongitude
1975-06-306.4N/A44.75-110.61
1959-08-186N/A44.8-110.7
1984-09-085.62044.24-106.02
1984-10-185.53342.38-105.72
1976-10-195.3544.8-110.7
1984-11-035.1542.49-108.85
1973-03-315.11044.5-110.5
1984-05-2951844.23-105.96
1973-03-285844.4-110.4
1976-09-034.81044.04-106.15
1985-08-214.8543.17-110.78
1973-04-224.8N/A42.6-107.8
1983-02-064.7544.57-110.64
1973-03-304.61144.4-110.4
1985-09-074.6543.16-110.72
1983-12-204.5543.29-110.77
1974-08-304.5144.7-110.8
1964-08-224.5N/A42.9-104.7
1974-09-194.41044.11-107.38
1973-04-214.41044.5-110.1
1963-04-274.4N/A44.8-110.3
1963-02-254.3N/A42.6-109.2
1985-08-304.3543.17-110.89
1985-08-164.31042.81-108.06
1985-08-224.3543.13-110.81
1977-03-034.2541.24-107.15
1969-08-274.2N/A42.9-110.8
1963-03-224.1N/A44.8-110.5
1972-12-084.12043.7-108.4
1983-02-134542.23-105.73
1978-11-113.9644.39-110.25
1981-03-123.8144.27-110.76
1978-03-073.8544.43-110.84
1977-03-073.8N/A44.4-110.8
1984-10-063.7544.74-110.53
1981-05-063.7743.43-110.66
1978-10-023.7544.71-110.8
1983-11-093.6543.72-110.2
1982-03-013.6542.99-111.04
1978-02-023.6544.39-110.81
1985-01-163.6144.78-110.4
1985-03-113.6643.02-110.85
1978-10-023.5544.74-110.78
1982-10-073.5543-111.07
1976-11-273.5544.66-110.82
1985-08-133.5541.82-108.65
1978-02-023.5444.38-110.83
1983-11-023.5543.42-110.92
1985-09-193.5843.12-110.93

Historical Tornado Events

A total of 58 historical tornado events that had recorded magnitude of 2 or above found in Wyoming.

DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
1987-07-21443°53'N / 110°09'W44°07'N / 109°50'W24.30 Miles2550 Yards002.5M0Teton
1955-06-26341°58'N / 104°19'W2.00 Miles27 Yards000K0Goshen
1955-06-27341°53'N / 105°01'W2.00 Miles100 Yards033K0Platte
1960-04-23341°02'N / 105°13'W41°00'N / 104°53'W17.20 Miles33 Yards0125K0Laramie
1962-06-16342°55'N / 108°44'W0.50 Mile67 Yards003K0Fremont
1965-07-12344°15'N / 104°15'W44°15'N / 104°03'W9.40 Miles1400 Yards00250K0Crook
1975-06-25344°14'N / 104°21'W44°22'N / 104°12'W11.50 Miles440 Yards0025K0Crook
1979-07-16341°10'N / 104°49'W41°04'N / 104°42'W8.80 Miles80 Yards14025.0M0Laramie
1985-08-02344°50'N / 107°57'W0.20 Mile10 Yards000K0Big Horn
1950-05-10241°11'N / 110°25'W2.00 Miles33 Yards000K0Uinta
1953-05-28243°51'N / 104°19'W44°23'N / 104°06'W38.20 Miles433 Yards003K0Weston
1953-06-12243°52'N / 105°16'W2.00 Miles33 Yards003K0Campbell
1955-06-26242°22'N / 104°44'W42°22'N / 104°40'W2.30 Miles20 Yards000K0Goshen
1958-06-03244°32'N / 107°47'W0.20 Mile17 Yards0025K0Big Horn
1958-06-12243°53'N / 104°20'W1.00 Mile200 Yards0025K0Weston
1959-05-27244°14'N / 105°36'W44°23'N / 105°32'W10.60 Miles33 Yards0025K0Campbell
1959-06-25244°16'N / 104°31'W1.00 Mile133 Yards0025K0Crook
1959-06-26244°30'N / 107°33'W44°38'N / 107°30'W9.20 Miles333 Yards113K0Big Horn
1960-08-21242°03'N / 104°11'W0.10 Mile33 Yards000K0Goshen
1961-05-18244°24'N / 104°35'W44°24'N / 104°34'W0025K0Crook
1962-06-11243°14'N / 106°21'W43°40'N / 105°30'W52.00 Miles100 Yards0425K0Natrona
1962-06-12244°29'N / 108°24'W0.50 Mile33 Yards003K0Big Horn
1962-07-09244°22'N / 108°14'W0.50 Mile17 Yards003K0Big Horn
1963-06-14241°48'N / 104°18'W0.50 Mile33 Yards0025K0Goshen
1964-06-26244°45'N / 108°45'W1.00 Mile50 Yards0025K0Park
1964-07-02243°48'N / 104°36'W0.10 Mile7 Yards0025K0Weston
1966-07-22244°18'N / 105°30'W44°14'N / 105°31'W3.60 Miles67 Yards0625K0Campbell
1967-04-12241°58'N / 104°24'W42°07'N / 104°15'W12.60 Miles50 Yards0025K0Goshen
1967-06-06243°06'N / 108°21'W43°12'N / 108°15'W8.20 Miles33 Yards020K0Fremont
1967-07-24244°22'N / 108°10'W003K0Big Horn
1971-05-29242°55'N / 106°12'W0.20 Mile33 Yards030K0Natrona
1973-08-27242°35'N / 108°51'W0.50 Mile200 Yards0025K0Fremont
1975-06-25244°18'N / 105°30'W44°17'N / 105°10'W16.30 Miles67 Yards010K0Campbell
1975-07-30243°49'N / 105°52'W43°47'N / 105°37'W12.40 Miles33 Yards000K0Campbell
1976-05-29241°15'N / 104°37'W0.20 Mile40 Yards000K0Laramie
1976-05-29241°20'N / 104°21'W000K0Laramie
1976-07-02241°25'N / 106°23'W2.50 Miles433 Yards00250K0Carbon
1978-07-04244°30'N / 108°00'W5.00 Miles200 Yards01250K0Big Horn
1978-07-11244°40'N / 108°50'W0.40 Mile200 Yards0025K0Park
1978-07-20243°00'N / 106°20'W1.00 Mile100 Yards0125K0Natrona
1978-07-28243°02'N / 104°40'W5.00 Miles700 Yards00250K0Niobrara
1978-07-28242°18'N / 104°02'W1.00 Mile200 Yards00250K0Goshen
1982-06-05242°35'N / 105°38'W42°35'N / 105°30'W7.00 Miles33 Yards0125K0Converse
1982-06-05243°03'N / 104°40'W1.00 Mile17 Yards03250K0Niobrara
1984-05-31244°18'N / 104°57'W0.50 Mile20 Yards0025K0Crook
1984-06-13243°00'N / 104°40'W43°02'N / 104°37'W4.00 Miles30 Yards01250K0Niobrara
1985-05-10244°10'N / 104°23'W1.00 Mile27 Yards003K0Crook
1986-06-07243°13'N / 108°07'W2.00 Miles50 Yards00250K0Fremont
1987-06-18243°00'N / 106°19'W43°03'N / 106°12'W7.00 Miles50 Yards00250K0Natrona
1987-07-21243°08'N / 106°43'W43°04'N / 106°38'W5.00 Miles140 Yards000K0Natrona
1988-05-06244°11'N / 105°21'W1.50 Miles50 Yards022.5M0Campbell
1990-05-24241°26'N / 104°25'W41°29'N / 104°21'W5.00 Miles400 Yards003K0Laramie
2001-07-10243°50'N / 108°13'W43°50'N / 108°13'W0.50 Mile50 Yards0000Hot Springs
 Brief Description: Eyewitnesses reported 2 brief touchdowns. Mobile home destroyed and barn damaged, approximately 1/4 mile apart. Property damage amounts unknown. Water at least 3 feet deep caused considerable damage to mobile home and fences. Three horses injured.
2005-08-12243°44'N / 105°28'W43°43'N / 105°28'W1.50 Miles450 Yards2135.0M0Campbell
 Brief Description: A tornado touched down 1 mile north of Wright and traveled southeast into the town. It crossed Wyoming Highway 387, slammed into a mobile home park, and dissipated a half mile from the highway before reaching the elementary school and Wright Blvd on the southeast edge of the park. It damaged 120 of the approximately 250 homes in the park; 91 were completely destroyed. Roofs, porches, siding, and trees sustained light damage from the strong wind gusts. Two people were killed and 13 injured; all were in mobile homes. M53MH, M97MH
2008-05-22241°00'N / 105°16'W41°19'N / 105°34'W25.00 Miles100 Yards01300K0KAlbany
 Brief Description: EVENT NARRATIVE: Tornado skipped along it's path north-northwest and moved across eastern and northeastern sections of Laramie, WY. Strong winds also overturned a tractor-trailer on Interstate 80 near Laramie and blew a boat off another trailer. EPISODE NARRATIVE: Severe thunderstorms moved generally north northwest over parts of far southeast Wyoming producing a few tornadoes as well as hail and some flooding. The most significant tornado tracked across southeastern Albany county into northern and eastern parts of the city of Laramie.
2009-06-05241°37'N / 104°22'W41°36'N / 104°13'W8.00 Miles100 Yards0010K0KGoshen
 Brief Description: EVENT NARRATIVE: A widely observed tornado moved across open country of far southern Goshen county. Only minor damage was caused, mainly to a few power poles and trees. EPISODE NARRATIVE: Scattered severe thunderstorms produced large hail and a tornado over parts of southeast Wyoming.
2009-07-13244°35'N / 104°25'W44°33'N / 104°14'W9.00 Miles600 Yards02300K0KCrook
 Brief Description: EVENT NARRATIVE: A large tornado touched down west of Cook Lake and tracked east-southeastward across the Bear Lodge Mountains, dissipating west of Wyoming Highway 111. The tornado downed about 4000 acres of Ponderosa pine trees, destroyed two metal shop buildings and a large barn at a ranch, and severely damaged a house and mobile home. Two people in the residences received very minor injuries. EPISODE NARRATIVE: A supercell thunderstorm developed over northern Campbell County and moved southeastward across Crook County. The storm produced very large hail across western Crook County, which caused significant damage in the New Haven and Hulett areas. The storm also spawned a large tornado over the Bear Lodge Mountains north of Sundance.
2010-05-18241°10'N / 104°22'W2.00 Miles100 Yards0050K0KLaramie
 Brief Description: EVENT NARRATIVE: A National Weather Service storm survey determined a tornado that struck Burns Wyoming the evening of May 18 was rated an EF-2. One house lost its roof. Additionally, the storm that spawned the tornado produced hail the size of golfballs which accumulated to over 3 feet in depth. EPISODE NARRATIVE: Southeast low level wind flow increased ahead of a low pressure system over northern Colorado the afternoon of May 18 2010. A strong low level southeast jet combined with dynamics of the low to create a favorable environment for severe thunderstorms. By mid afternoon thunderstorms over northern Colorado began to rotate, producing a tornado just south of the Wyoming state line south of Cheyenne. Severe thunderstorms continued into the evening hours of the 18th producing severe weather across the Nebraska panhandle and extreme southeast Wyoming.


* 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.


 
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