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Rockham, SD Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Rockham is about the same as South Dakota average and is much lower than the national average. The risk of tornado damage in Rockham is lower than South Dakota average and is lower than the national average.

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

Earthquake Index, #271

Rockham, SD
0.01
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

Rockham, 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, #273

Rockham, SD
80.98
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 1,927 other weather extremes events within 50 miles of Rockham, SD were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:15Cold:2Dense Fog:0Drought:0
Dust Storm:0Flood:121Hail:1,037Heat:1Heavy Snow:11
High Surf:0Hurricane:0Ice Storm:0Landslide:0Strong Wind:24
Thunderstorm Winds:659Tropical Storm:0Wildfire:7Winter Storm:24Winter Weather:0
Other:26 

Volcanos Nearby

No volcano is found in or near Rockham, SD.

Historical Earthquake Events

No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Rockham, SD.

No historical earthquake events found in or near Rockham, SD.

Historical Tornado Events

A total of 26 historical tornado events that had recorded magnitude of 2 or above found in or near Rockham, SD.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
6.51973-04-19244°55'N / 98°54'W44°57'N / 99°00'W4.90 Miles27 Yards003K0Faulk
12.11957-06-20245°01'N / 98°38'W1025K0Spink
15.01966-07-26245°00'N / 99°06'W003K0Faulk
17.51983-09-02244°48'N / 99°09'W0.20 Mile10 Yards0025K0Hand
17.61957-06-09345°02'N / 99°08'W1.00 Mile33 Yards0025K0Faulk
20.91983-09-02244°54'N / 99°15'W0.20 Mile10 Yards003K0Hand
25.11956-06-21245°10'N / 98°28'W000K0Spink
28.61973-07-01345°15'N / 98°30'W0.30 Mile30 Yards1325K0Brown
28.72006-08-24244°31'N / 99°04'W44°30'N / 98°56'W5.00 Miles300 Yards0000Hand
 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.
31.81959-06-23244°27'N / 98°43'W0025K0Hand
32.61964-07-23244°51'N / 98°13'W44°55'N / 98°06'W6.80 Miles33 Yards0025K0Spink
33.42006-08-24244°26'N / 98°47'W44°25'N / 98°41'W5.00 Miles300 Yards0000Hand
 Brief Description: A supercell thunderstorm tracking southeast produced a fifth tornado in Hand county. The tornado touched downed south of Vayland and tracked southeast and into Beadle county. See storm data for southeast South Dakota. The tornado formed in a heavily wooded area tracking along a county road producing F1 damage to several farmsteads. A mobile home was flipped and destroyed. A grain storage building was flipped onto a car. Several homes had significant roof and window damage. Numerous trees were snapped. As the tornado crossed into Beadle county it was producing F2 damage.
33.41955-04-19245°15'N / 99°10'W45°22'N / 99°14'W8.20 Miles100 Yards000K0Edmunds
37.51959-07-07245°03'N / 98°05'W0025K0Spink
40.61966-07-31245°26'N / 98°31'W45°27'N / 98°27'W2.30 Miles253 Yards13250K0Brown
40.92006-08-24344°25'N / 98°41'W44°19'N / 98°16'W19.50 Miles500 Yards0215.0M0Beadle
 Brief Description: A tornado, entering Beadle County from Hand County to the west, destroyed 8 houses, damaged at least 7 other houses, and destroyed or damaged numerous farm buildings. One of the destroyed houses and several destroyed small buildings were on a farmstead 2 miles south of Wessington, and five large high voltage transmission towers were blown down about 3 miles southeast of Wessington. A woman was cut on the neck at one farm southwest of Wolsey where the house and all other buildings were destroyed; the injury was not life threatening. The tornado tossed a car and 2 pickups up to 50 feet at the same farm. Another non life threatening injury occurred southeast of Wolsey, again on a farm where the house and all buildings were destroyed. Several vehicles were destroyed or damaged. The tornado killed 10 head of cattle at one farmstead just south of Wolsey. The tornado snapped off numerous power poles, caused widespread tree damage, and severely damaged a bridge where it crossed U.S. Highway 14. The tornado also caused crop damage, but the amount of crop damage was not known. The tornado dissipated one and a half miles southwest of Huron.
41.31961-06-21345°28'N / 98°14'W44°59'N / 97°59'W35.40 Miles33 Yards003K0Brown
45.01955-06-28245°18'N / 98°10'W45°20'N / 98°03'W5.40 Miles50 Yards0025K0Brown
45.31959-05-25244°15'N / 98°46'W003K0Hand
46.12010-05-22245°32'N / 99°00'W45°36'N / 98°54'W7.00 Miles200 Yards000K0KEdmunds
 Brief Description: EVENT NARRATIVE: The seventh tornado formed in northeast Edmunds county and tracked northeast. The tornado took off sections from the roof of a barn. The tornado then tracked through primarily crop and pasture land to near Deerfield Colony and into southeast Mcpherson county. Sporadic tree damage was observed along the tornado path with many wooden power poles completely sheared off. Wind speeds with this tornado were estimated between 111 and 120 mph. EPISODE NARRATIVE: Several supercell thunderstorms developed along a very strong warm front and produced nine tornadoes from Akaska to Bowdle to Hecla. The largest of the tornadoes was an EF4 tornado which occurred near Bowdle. This tornado produced devastating damage in the Bowdle area. The other tornadoes ranged from EF0 to EF2 and caused extensive tree and building damage. Nearly one-hundred power poles were downed along with several high line towers leaving nearly a thousand customers without power. Also, very strong straight line winds and large hail up to the size of golfballs affected parts of the area causing some damage.
46.21955-04-19245°30'N / 98°30'W45°34'N / 98°30'W4.60 Miles50 Yards000K0Brown
46.41978-06-15245°28'N / 98°18'W015250K0Brown
47.32001-07-18245°15'N / 99°40'W45°14'N / 99°40'W1.00 Mile100 Yards0000Edmunds
 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.
47.41971-07-03244°13'N / 99°00'W44°14'N / 98°56'W2.30 Miles100 Yards0025K0Hand
47.51961-06-28245°37'N / 99°38'W45°30'N / 98°37'W49.70 Miles33 Yards00250K0Mcpherson
49.51971-07-03344°16'N / 99°14'W44°15'N / 99°17'W0025K0Hand


* 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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