Tornado outbreak of June 18–22, 2011
 A large EF3 tornado in Polk County, Nebraska on June 20 | |
| Type | Tornado outbreak |
|---|---|
| Duration | June 18–22, 2011 |
| Tornadoes confirmed | 78 |
| Max. rating1 | EF3 tornado |
| Duration of tornado outbreak2 | around 4 days |
| Fatalities | 0 fatalities, 4 injuries |
| Damage | $44 million (2011 USD)[1] |
| Areas affected | Great Plains, Midwest, Central United States |
Part of the tornado outbreaks of 2011 1Most severe tornado damage; see Enhanced Fujita scale 2Time from first tornado to last tornado | |
The tornado outbreak of June 18–22, 2011 was a large and damaging tornado outbreak that produced widespread tornado activity across much of the Midwest and Central U.S. The most intense activity occurred on June 20, when multiple supercell thunderstorms produced numerous tornadoes across the Great Plains. Some of these tornadoes were large and intense, but for the most part only affected rural areas. The strongest of these tornadoes impacted Kansas and Nebraska. Another notable event occurred on June 22, when a series of 5 tornadoes struck the Louisville metropolitan area. One of these tornadoes caused severe damage at the famous Churchill Downs racetrack. Despite the number and intensity of some of the tornadoes, the outbreak caused no fatalities.
Meteorological synopsis
[edit]On June 18, a total of 11 tornadoes touched down across the Great Plains and Midwest. These tornadoes were mostly weak or remained over open country. The worst of the damage was to trees and outbuildings.
On June 19, the Storm Prediction Center issued a moderate risk of severe weather for the Central Plains. By the evening hours, several tornadoes had touched down over rural areas. Most of these tornadoes were weak. However, an EF2 tornado caused significant damage near Cherryville, Missouri, and injured 3 people. Another EF2 tornado also caused considerable damage in Breckinridge County, Kentucky as well. An EF1 tornado caused severe damage south of Du Quoin, Illinois and injured 1 person.[2]
During the afternoon of June 20, a particularly dangerous situation (PDS) tornado watch was issued for much of central Nebraska and north-central Kansas due to the threat of significant tornadoes. Additionally, very large hail, at least 4 in (10 cm) in diameter, was expected within the watch area. Around 1:00 p.m. local time, storm chasers reported a large EF3 tornado on the ground north of Hill City, Kansas and again later that afternoon near Elm Creek, Nebraska. Numerous other tornadoes were reported across the region including near Ravenna and in York County, some reported to have been very large and intense, but mostly over open country. However, some of the tornadoes impacted numerous rural farmsteads, and caused severe damage. Several of these tornadoes reached EF3 intensity. Tornado warnings stretched from North Dakota to Kansas. Additionally, a major derecho event developed farther south – a PDS Severe Thunderstorm Watch was issued for parts of Oklahoma and North Texas as well. On June 21, tornado watches were issued for several areas, including central Minnesota and Wisconsin, southern Illinois and parts of Missouri, and lower Michigan. Tornadoes were reported in Anoka County, Minnesota, and Green Lake and Fond du Lac Counties in Wisconsin. Several tornadoes touched down across the area, causing mostly minor damage.[3] Additionally, local law enforcement reported a tornado in Allegan County in Michigan, with photos taken also showing what looked like a tornado, but no damage was seen in the area, and the National Weather Service determined it to have been low hanging clouds.[4] Meanwhile, a major derecho event impacted the Chicago Metropolitan Area.[5] The worst damage was in Wheeling, Illinois. A tornado touched down in Downers Grove, Illinois[6]
A series of tornadoes tracked across the Louisville, Kentucky area late on June 22.[7] A total of five tornadoes were confirmed in the area, including two that were rated EF2. One of the tornadoes directly hit Churchill Downs racetrack severely damaging several buildings on the site. Other significant damage was reported in several industrial parks in the metropolitan area with buildings heavily damaged. A few other tornadoes caused minor damage in Indiana, Tennessee, Mississippi, and Michigan.[8]
Tornadoes
[edit]| EFU | EF0 | EF1 | EF2 | EF3 | EF4 | EF5 | Total |
|---|---|---|---|---|---|---|---|
| 0 | 43 | 21 | 9 | 5 | 0 | 0 | 78 |
June 18 event
[edit]| List of reported tornadoes – Saturday, June 18, 2011 | ||||||
|---|---|---|---|---|---|---|
| EF# | Location | County | Coord. | Time (UTC) | Path Length | Comments/Damage |
| Oklahoma | ||||||
| EF0 | W of Hulah | Osage | 36°56′N 96°10′W / 36.93°N 96.16°W | 0125 | Tornado lasted for 10 to 15 minutes over an open field, producing no known damage. | |
| EF0 | E of Copan | Washington | 36°32′N 95°31′W / 36.54°N 95.52°W | unknown | Brief tornado remained over open country with no damage. | |
| EF0 | E of Grainola | Osage | 36°34′N 96°20′W / 36.57°N 96.33°W | unknown | Brief tornado remained over open country with no damage. | |
| EF0 | SW of Boulangerville | Osage | 36°33′N 96°10′W / 36.55°N 96.17°W | unknown | Brief tornado remained over open country with no damage. | |
| Missouri | ||||||
| EF0 | SE of Brighton | Polk, Greene | 37°25′N 93°19′W / 37.42°N 93.32°W | 0503 | 3 mi (4.8 km) | A metal barn was destroyed, a home had minor siding damage and several trees were felled. |
| EF1 | NE of Everton | Dade, Greene | 37°13′N 93°22′W / 37.22°N 93.37°W | 0435 | 11 mi (18 km) | Numerous trees were snapped and uprooted. |
| EF1 | SE of Dadeville | Dade, Polk | 37°16′N 93°22′W / 37.27°N 93.37°W | Unknown | 6 mi (9.7 km) | Numerous trees were snapped and uprooted and outbuildings were destroyed. |
| Colorado | ||||||
| EF0 | NE of Wild Horse | Cheyenne | 38°32′N 102°34′W / 38.54°N 102.57°W | unknown | unknown | Tornado remained over open fields with no damage. |
| EF0 | SW of Firstview | Cheyenne | 38°28′N 102°20′W / 38.46°N 102.34°W | unknown | unknown | Tornado remained over open fields with no damage. |
| Kansas | ||||||
| EF0 | SW of Gove | Gove | 38°31′N 100°18′W / 38.51°N 100.3°W | unknown | unknown | Tornado remained over open fields with no damage. |
| Nebraska | ||||||
| EF0 | W of Mitchell | Scotts Bluff | 41°34′N 103°31′W / 41.57°N 103.51°W | unknown | unknown | Tornado remained over open fields with no damage. |
| Sources: SPC Storm Reports for 06/18/11 | ||||||
June 19 event
[edit]| List of reported tornadoes – Sunday, June 19, 2011 | ||||||
|---|---|---|---|---|---|---|
| EF# | Location | County | Coord. | Time (UTC) | Path length | Comments/Damage |
| Missouri | ||||||
| EF0 | W of Cherryville (1st tornado) | Crawford | 0700 | 0.75 mi (1.21 km) | Extensive tree damage occurred. | |
| EF2 | W of Cherryville (2nd tornado) | Crawford | 0710 | 3.1 mi (5.0 km) | Numerous trees snapped and uprooted along the path. Two homes were also damaged, one of which lost a significant portion of its roof and parts of the walls. Support beams were found up to 0.75 mi (1.21 km) from the home. Three people inside the home sustained minor injuries. | |
| EF0 | NW of Westboro | Atchison | unknown | 1 mi (1.6 km) | Tornado remained over open country with no damage. | |
| Kentucky | ||||||
| EF2 | S of Harned | Breckinridge | 37°45′N 86°25′W / 37.75°N 86.42°W | 1139 | 1 mi (1.6 km) | A house sustained significant roof damage and two barns were heavily damaged. Trees were uprooted and snapped. Power poles were pushed over and sheet metal was found thrown up to 300 yards as well. |
| EF0 | SE of Harned | Breckinridge | 37°44′N 86°24′W / 37.73°N 86.40°W | 1142 | 0.1 mi (160 m) | Brief tornado damaged a barn. |
| Indiana | ||||||
| EF0 | S of Sulphur Springs | Perry | 38°11′N 86°30′W / 38.19°N 86.50°W | 1531 | 0.2 mi (320 m) | Brief tornado uprooted several trees |
| Wisconsin | ||||||
| EF0 | S of Theresa | Dodge | 43°27′N 88°27′W / 43.45°N 88.45°W | 2156 | Unknown | Brief tornado flattened grass in a swirl pattern and snapped tree limbs. |
| Kansas | ||||||
| EF0 | E of Woodbine | Morris | 38°48′N 96°54′W / 38.80°N 96.90°W | 0112 | Unknown | Brief touchdown with no damage. Tornado lasted less than one minute. |
| Colorado | ||||||
| EF0 | NW of Sedgwick | Sedgwick | unknown | unknown | Brief tornado over open country with no damage. | |
| Iowa | ||||||
| EF0 | E of Rake | Winnebago | unknown | unknown | Landspout tornado over open country with no damage. Tornado was very slow moving. | |
| Illinois | ||||||
| EF1 | S of Du Quion | Perry | 37°35′N 89°09′W / 37.59°N 89.15°W | unknown | 3 mi (4.8 km) | Tornado struck the Du Quion State Fairgrounds and caused severe damage. Multiple trees were snapped and uprooted in the area, some of which landed on a shower/restroom building and the Farm Service Building, destroying them both. Several RV's were flipped or demolished, in one of which 3 people were trapped and required rescue. An arena building sustained damage to its doors and had air conditioning units torn from its roof. Several nearby homes had shingles torn off and sustained damage from falling trees. Uprooted trees ruptured gas lines in the area as well. One person was injured. |
| Nebraska | ||||||
| EF0 | NW of Max(1st tornado) | Dundy | unknown | 3 mi (4.8 km) | Tornado damaged the roof of a barn and overturned an irrigation pivot. | |
| EF0 | NW of Max(2nd tornado) | Dundy | unknown | 2 mi (3.2 km) | Tornado remained over open country with no damage. | |
| EF0 | N of Perry | Red Willow | unknown | 3 mi (4.8 km) | Large dusty tornado remained over open country with no damage. | |
| Sources: SPC Storm Reports for 06/18/11 and 06/19/11 | ||||||
June 20 event
[edit]| List of reported tornadoes – Monday, June 20, 2011 | ||||||
|---|---|---|---|---|---|---|
| EF# | Location | County | Coord. | Time (UTC) | Path length | Comments/Damage |
| Iowa | ||||||
| EF1 | New Sharon area | Mahaska | 41°28′N 92°39′W / 41.47°N 92.65°W | 1005 | 0.5 mi (800 m) | A modular building was mostly destroyed and a few gravestones were toppled in a cemetery. Numerous trees were downed, some of which landed on homes. Power poles were downed as well and cars were pushed over into a ditch. |
| EF0 | NW of Kingsley | Plymouth | 42°40′N 96°05′W / 42.67°N 96.08°W | 0240 | 1 mi (1.6 km) | Numerous farm buildings and grain bins were damaged |
| EF1 | SW of Moorhead | Monona | 42°00′N 95°32′W / 42.00°N 95.54°W | unknown | 7 mi (11 km) | Numerous trees and power lines were downed. One farm house lost section of its roof. A grain bin and several outbuildings were destroyed as well. |
| EF1 | NW of St. Joseph | Kossuth | 42°34′N 97°11′W / 42.57°N 97.19°W | unknown | 1 mi (1.6 km) | One home was badly damaged and grain bins were destroyed. Trees were downed as well. |
| Illinois | ||||||
| EF1 | SE of Bonfield | Kankakee | 41°08′N 88°02′W / 41.13°N 88.03°W | 1114 | 2.5 mi (4.0 km) | Numerous trees were snapped or uprooted, causing severe damage to several homes. One outbuilding was destroyed. |
| Kansas | ||||||
| EF0 | SE of Quinter | Gove | 1755 | 1 mi (1.6 km) | Dusty tornado remained over open fields with no damage. | |
| EF0 | NNE of Quinter | Gove | 1800 | 3 mi (4.8 km) | Tornado remained over open country with no damage. | |
| EF0 | WNW of St. Peter | Graham | 1812 | 5 mi (8.0 km) | Tornado remained over open country with no damage. | |
| EF3 | NNW of Hill City (1st tornado) | Graham, Norton | 39°30′N 99°51′W / 39.50°N 99.85°W | 1854 | 11 mi (18 km) | Large wedge tornado produced severe damage in the area. Power poles were destroyed and irrigation pivots were overturned. Heavy farm equipment was thrown up to 3/4 of a mile. Grain bins and outbuildings were destroyed, and vehicles were flipped. One home sustained heavy roof damage and tree damage occurred as well. |
| EF1 | NNW of Hill City (2nd tornado) | Graham | 1857 | 1 mi (1.6 km) | Satellite tornado to the EF3 Hill City storm | |
| EF1 | N of Hill City | Graham | 1904 | 1 mi (1.6 km) | Satellite tornado to the EF3 Hill City storm. | |
| EF0 | NNW of Densmore | Norton | 1915 | 2 mi (3.2 km) | Dusty tornado remained over open country with no damage. | |
| EF3 | N of Densmore | Norton | 1925 | 4 mi (6.4 km) | One home was badly damaged. Outbuildings were destroyed and power poles were snapped. Trees were snapped and debarked as well. | |
| EF1 | S of Calvert | Norton | 1926 | 2 mi (3.2 km) | A barn was destroyed and four power poles were snapped. | |
| EF2 | SSE of Calvert | Norton | 1930 | 4 mi (6.4 km) | A barn and grain bin were destroyed. Power lines were damaged and irrigation pivots were overturned. One home was heavily damaged. | |
| EF0 | SE of Almena | Norton | 1940 | 2 mi (3.2 km) | Tornado remained over open country with no damage. | |
| EF3 | NE of Almena | Norton, Phillips | 39°53′N 99°43′W / 39.89°N 99.71°W | 1941 | 5 mi (8.0 km) | A house was completely destroyed, where four people were injured. Many homes and farmsteads sustained significant damage in the area. Multiple outbuildings were destroyed and heavy farm equipment was thrown and destroyed as well. |
| EF0 | S of Selden | Sheridan | 2227 | 9 mi (14 km) | Tornado remained over open country with no damage. | |
| EF0 | NW of Norcatur | Decatur | 2325 | 1 mi (1.6 km) | Brief tornado remained over open country with no damage. | |
| EF0 | NE of Norcatur | Norton | 2344 | 1 mi (1.6 km) | Brief tornado remained over open country with no damage. | |
| EF0 | N of Norcatur | Decatur | 2345 | 1 mi (1.6 km) | Brief tornado remained over open country with no damage. | |
| Nebraska | ||||||
| EF1 | S of Stamford | Harlan | 40°02′N 99°35′W / 40.04°N 99.59°W | 2000 | 13 mi (21 km) | Multi-vortex tornado. Several outbuildings were destroyed and many windows were broken. Tornado also destroyed a grain bin and snapped tree limbs. |
| EF0 | ENE of Westmark | Phelps, Buffalo | 2035 | 5 mi (8.0 km) | Tornado overturned multiple irrigation pivots along the path. Minor tree damage also occurred. | |
| EF2 | Elm Creek area | Buffalo | 40°43′N 99°23′W / 40.72°N 99.38°W | 2051 | 4 mi (6.4 km) | Tornado began west of Elm Creek and tracked east-southeast into the city. Numerous trees and were snapped or uprooted and several homes were damaged, some of which lost their roofs. One man was injured when his semi-truck was flipped by the tornado. A few outbuildings were also destroyed and power poles were snapped. While moving through the city, the storm took a sharp northward turn and weakened. Further down the track, the tornado briefly re-intensified as it damaged a home. It dissipated roughly 2.5 mi (4.0 km) southwest Amherst. |
| EF3 | W of Amherst | Buffalo | 40°52′N 99°16′W / 40.87°N 99.27°W | 2109 | 10 mi (16 km) | Large wedge tornado damaged or destroyed over 48 homes, some of which were completely flattened. Large metal high-tension power line trusses were knocked down and over 40 irrigation pivots were damaged or destroyed. Numerous trees and power lines were snapped and outbuildings were destroyed as well. |
| EF0 | N of Pleasanton | Buffalo | 40°56′N 99°03′W / 40.94°N 99.05°W | 2135 | 4 mi (6.4 km) | Tornado remained over open country with no damage. |
| EF2 | SW of Rockville | Sherman | 41°06′N 98°53′W / 41.10°N 98.88°W | 2146 | 3 mi (4.8 km) | One home was damaged along with several trees. A pole building was destroyed as well. |
| EF0 | WSW of Farwell | Howard | 2205 | unknown | Brief tornado touchdown in a field damaged an irrigation pivot. | |
| EF2 | SSW of Hampton | Hamilton | 40°48′N 97°56′W / 40.80°N 97.93°W | 2225 | 9 mi (14 km) | 7 homes were damaged by the tornado. Numerous trees and power poles were snapped and multiple outbuildings were damaged or destroyed. A grain truck was overturned and several grain bins were damaged. At least 60 irrigation pivots were damaged or destroyed, some of which were found wrapped around trees. |
| EF1 | S of North Loup | Valley | 41°25′N 98°46′W / 41.42°N 98.77°W | 2235 | 1 mi (1.6 km) | Damage occurred at Davis Creek campground. Numerous trees were downed and two restroom facilities had their roofs torn off. |
| EF2 | SW of Bradshaw to NE of Polk | York, Polk | 40°53′N 97°47′W / 40.88°N 97.78°W | 2240 | 17 mi (27 km) | A train was derailed, grain bins damaged and over 40 power poles were downed. One home was badly damaged and a combine was tossed into a field and destroyed. Trees were also damaged and irrigation pivots were overturned. |
| EF3 | W of Osceola | Polk | 41°11′N 97°42′W / 41.18°N 97.70°W | 2302 | 9 mi (14 km) | One home was destroyed and two others were damaged. Trees were debarked and power poles were snapped, irrigation pivots were overturned, and crops were stripped from the ground. Outbuildings were destroyed and a tractor was thrown and destroyed almost beyond recognition. An ATV, a car, and a semi-truck trailer were tossed by the tornado as well. |
| EF1 | SE of Pierce | Pierce | 0027 | 12 mi (19 km) | Tornado downed numerous trees and power poles and destroyed barns and outbuildings. Irrigation pivots were overturned and a section of roof was torn from a home. Farm equipment was thrown up to 300 yards and other debris was thrown up to a quarter of a mile. A steel bin was thrown into a car, totaling the vehicle, and injuring the occupant. | |
| EF1 | Fremont area | Dodge | 0100 | 6 mi (9.7 km) | Tornado struck the northeast side of town. Numerous trees and power poles were snapped, some of which landed on homes and vehicles, and a garage was badly damaged. A YMCA sustained severe roof damage and a vehicle was flipped. | |
| Texas | ||||||
| EF0 | E of Eliasville | Stephens | 32°57′N 98°43′W / 32.95°N 98.72°W | 0145 | Unknown | Brief tornado with no damage |
| North Dakota | ||||||
| EF0 | SW of Raub | McLean | 47°22′N 102°04′W / 47.36°N 102.06°W | unknown | unknown | Slow moving tornado remained over open country with no damage. |
| EF0 | NE of Almont | Morton | 46°28′N 101°15′W / 46.46°N 101.25°W | unknown | unknown | Brief tornado remained over open country with no damage. |
| Sources: SPC Storm Reports for 06/20/11, NWS Goodland, NWS Hastings | ||||||
June 21 event
[edit]| List of reported tornadoes – Tuesday, June 21, 2011 | ||||||
|---|---|---|---|---|---|---|
| EF# | Location | County | Coord. | Time (UTC) | Path length | Comments/Damage |
| Iowa | ||||||
| EF0 | NE of Clutier | Tama | 42°05′N 92°23′W / 42.09°N 92.39°W | 0615 | 300 yards (270 m) | Brief tornado snapped several trees and tore the roof off an outbuilding. |
| Wisconsin | ||||||
| EF1 | WSW of Alto | Fond du Lac, Green Lake | 43°40′N 88°51′W / 43.66°N 88.85°W | 2021 | 4.6 mi (7.4 km) | A pole-shed was flattened and a barn was damaged. Homes were also damaged. Several trees and power lines were downed. |
| EF1 | SSE of Green Lake | Fond du Lac, Green Lake | 43°47′N 88°55′W / 43.78°N 88.92°W | 2036 | 2.5 mi (4.0 km) | A barn had part of its roof torn off and a pole shed sustained roof damage. Many trees were snapped or uprooted. |
| Minnesota | ||||||
| EF0 | Coon Rapids area | Anoka | 45°10′N 93°19′W / 45.17°N 93.31°W | 2010 | 5.5 mi (8.9 km) | Damage was mostly confined to downed trees and power lines, a few of which landed on homes. |
| Texas | ||||||
| EF0 | E of Timpson | Shelby | 31°55′N 94°22′W / 31.91°N 94.36°W | 2055 | 4 mi (6.4 km) | Several trees and branches were snapped |
| EF0 | W of Center | Shelby | 31°47′N 94°14′W / 31.79°N 94.23°W | 2200 | 1.5 mi (2.4 km) | Several trees and branches were snapped |
| Illinois | ||||||
| EF1 | S of Downers Grove | DuPage | 41°46′N 88°01′W / 41.77°N 88.02°W | 0131 | 2.1 mi (3.4 km) | Many trees were snapped and uprooted, which damaged over 35 homes. A fence was blown down as well. |
| EF1 | WSW of Mount Prospect | Cook | 42°04′N 87°58′W / 42.06°N 87.96°W | 0148 | 2.3 mi (3.7 km) | Numerous trees snapped and uprooted along the path, a few of which landed on homes and caused structural damage. |
| Sources: SPC Storm Reports for 06/21/11, National Weather Service – June 21st Suburban Chicago Tornadoes | ||||||
June 22 event
[edit]| List of reported tornadoes – Wednesday, June 22, 2011 | ||||||
|---|---|---|---|---|---|---|
| EF# | Location | County | Coord. | Time (UTC) | Path length | Comments/Damage |
| Mississippi | ||||||
| EF1 | Vardaman area | Calhoun | 33°52′36″N 89°11′09″W / 33.87680°N 89.18581°W | 1750 | 3 mi (4.8 km) | Short-lived tornado downed numerous trees, some of which fell on homes, and damaged several tractor sheds. One person was injured after a tree fell on a home. |
| Tennessee | ||||||
| EF0 | NW of Loudon | Roane | 35°46′N 84°28′W / 35.77°N 84.47°W | 2240 | 0.1 mi (160 m) | Brief tornado downed several trees. |
| Indiana | ||||||
| EF0 | SW of New Middletown | Harrison | 31°50′N 86°02′W / 31.84°N 86.04°W | 2327 | 0.3 mi (480 m) | A row of trees was damaged and a house lost some siding. |
| Michigan | ||||||
| EF0 | Lake Leelanau | Leelanau | 1837 | unknown | Trees were downed and boats and docks were damaged. Tornado moved over the lake and dissipated. | |
| Kentucky | ||||||
| EF2 | Louisville area | Jefferson | 38°13′N 85°44′W / 38.22°N 85.74°W | 0004 | 1.2 mi (1.9 km) | Several barns were badly damaged in Churchill Downs, along with a church on the property. Elsewhere a large industrial building suffered heavy damage and numerous trees were uprooted and snapped. An office building lost a large section of its roof as well. A hotel also sustained roof damage and numerous power poles were snapped. Homes sustained shingle and siding damage and metal stoplight poles were downed. Several horses were displaced by the tornado but were later rounded up uninjured. |
| EF1 | W of downtown Jeffersontown | Jefferson | 38°13′N 85°37′W / 38.21°N 85.61°W | 0129 | 1.9 mi (3.1 km) | Tornado moved through a subdivision and caused roof, gutter, and siding damage. A locked pool gate was thrown 35 yards (32 m). Several trees were downed as well. |
| EF2 | Downtown Jeffersontown area | Jefferson | 38°13′N 85°33′W / 38.21°N 85.55°W | 0134 | 1.6 mi (2.6 km) | Numerous trees snapped and uprooted, some of which landed on structures and vehicles. A warehouse and a nursing home were badly damaged and cars were flipped and tossed 25 feet. A small shed was thrown 30 feet and a metal light pole was bent over. A gas station was damaged as well. |
| EF1 | NE of downtown Jeffersontown | Jefferson | 38°13′N 85°33′W / 38.21°N 85.55°W | 0138 | 1.7 mi (2.7 km) | Several warehouses suffered roof damage. An air handler was thrown 100–125 yards. Dozens of trees were uprooted as well. |
| Sources: SPC Storm Reports for 06/22/11, NWS louisville | ||||||
See also
[edit]- List of North American tornadoes and tornado outbreaks
- Tornado outbreak sequence of June 14–19, 2023
References
[edit]- ^ Storm Events Database, NOAA
- ^ NOAA (June 22, 2011). "20110620's Storm Report (1200 UTC − 1159 UTC)". Retrieved June 22, 2011.[dead link]
- ^ NOAA (June 22, 2011). "20110621's Storm Report (1200 UTC − 1159 UTC)". Retrieved June 22, 2011.[dead link]
- ^ "June 21st Severe Weather".[dead link]
- ^ "The Cross Country Derecho of July 2011". www.spc.noaa.gov. Retrieved 2024-07-16.
- ^ "June 21, 2011 Tornado touch down in Downers Grove, IL".
- ^ US Department of Commerce, NOAA. "Louisville Area Tornadoes June 22, 2011". www.weather.gov. Retrieved 2024-07-24.
- ^ "June 22, 2011 Storm Damage Survey Information".[dead link]
External links
[edit]For the latest severe weather information: