May 2009 derecho series

The May 2009 derecho series was an unusually strong sequence of derecho events and tornadoes beginning on May 2, 2009 and continuing through May 8, which primarily affected the Southern United States. At least seven people were killed by the storms. An associated tornado outbreak also resulted in nearly 100 tornadoes, some strong, with most strong tornadoes, most damage, and all of the deaths on May 8. In total, nine people were killed, dozens were injured and at least $70 million in damage occurred, $58 million on May 8.

May 3: Deep South derecho

On May 3, a moderate risk of severe weather was issued for parts of Mississippi, Alabama, and Georgia, mainly for a threat of intense downburst winds.[1] A major progressive derecho with widespread and extensive wind damage - as strong as 110 mph (175 km/h) at times[2] - and embedded tornadoes was confirmed to have traveled from East Texas all the way to Alabama with numerous reports of damage all across Louisiana, Mississippi and Alabama and into northern Georgia. At least one person was killed when a tree fell on her mobile home.[3] A number of "large and extremely dangerous" tornadoes were reported in Alabama in the afternoon of May 3 by Storm Spotters and the NWS. Significant damage was reported near Moody, Pell City and Ragland in Blount and St. Clair Counties from this tornado according to ABC 33/40 coverage while tornadoes were reported in southern Jefferson County and northern Shelby County. Another reported tornado in Crossville, Tennessee resulted in significant damage and injuries.[4]

May 8: Plains to Ohio Valley derecho

Another major severe weather event developed early on May 8 over southwestern Kansas. It quickly formed into a major progressive derecho which tracked across the central Plains, the Ozarks and into the Ohio Valley.[5] Several tornadoes also developed, primarily in the Springfield, Missouri area where damage was reported.[6] A moderate risk of severe weather was issued primarily due to the wind threat.[7] That was preceded by two PDS severe thunderstorm watches (a rare issuance)[8] issued early that morning, and a tornado watch later in the morning mentioning winds of 105 miles per hour (169 km/h) possible.[9] Two people were killed near Poplar Bluff, Missouri when winds knocked a tree into their car. Another Missouri resident suffered a fatal heart attack after he was blown away from his home and thrown into a building. A woman was killed in southeastern Kansas after her mobile home was blown off its foundation.[10] Eventually, the storm developed a tropical cyclone-like structure (a mesolow), with a well-defined eye feature.[11] In addition, winds were measured as high as 106 miles per hour (171 km/h) in Carbondale, Illinois.[12] Another death occurred in Dallas County, Missouri from an EF2 tornado, as well as two others from an EF-3 tornado in Kirksville, Kentucky.[13] Dr. Joe Schaefer, director of the National Oceanic and Atmospheric Administration's Storm Prediction Center, commented that the "derecho complex is one of the worst I've seen in the past decade".[14]

Other severe weather

On May 2, an EF1 tornado hit Eggville, Mississippi where damage was reported as a slow-moving front continued southward. In Valley Ranch, Texas, the practice facility for the Dallas Cowboys was destroyed by a microburst, injuring 12 people.[15]

Tornadoes

Confirmed tornadoes by Enhanced Fujita rating
EFU EF0 EF1 EF2 EF3 EF4 EF5 Total
0 35 45 14 2 0 0 96

May 2 event

List of reported tornadoes - Saturday, May 2, 2009
EF#
Location
County
Coord.
Time (UTC)
Path length
Damage
Mississippi
EF0 Eggville area Lee 34.34°N 88.57°W / 34.34; -88.57 (Eggville (May 2, EF0)) 1850 unknown Power lines and trees knocked down.
EF0 Mantachie area Itawamba 34.32°N 88.49°W / 34.32; -88.49 (Mantachie (May 2, EF0)) 1900 unknown One shed demolished, numerous trees broken
EF0 Fairview area Itawamba 34.37°N 88.32°W / 34.37; -88.32 (DeKalb (May 2, EF0)) 1922 unknown Damage limited to trees
Texas
EF0 SW of DeKalb Bowie 33.51°N 94.62°W / 33.51; -94.62 (DeKalb (May 2, EF0)) 2144 1 mile (1.6 km) Damage limited to trees
EF1 N of Douglassville Cass 33.19°N 94.35°W / 33.19; -94.35 (Douglassville (May 2, EF1)) 2251 2 miles (3.2 km) Numerous trees snapped or uprooted with minor shingle damage to some homes.
EF0 SE of Leesburg Camp 33.00°N 94.97°W / 33.00; -94.97 (Leesburg (May 2, EF0)) 0156 2 miles (3.2 km) Damage limited to trees that are snapped or uprooted
Alabama
EF0 Luxapallila Fayette 33.72°N 87.88°W / 33.72; -87.88 (Luxapallila (May 2, EF0)) 2220 0.1 miles (0.16 km) Brief tornado touchdown in a wooded area
EF0 Hightogy Lamar 33.67°N 88.09°W / 33.67; -88.09 (Hightogy (May 2, EF0)) 2227 2.5 miles (4.0 km) Damage limited to trees
Arkansas
EF1 NW of Fouke Miller 33.26°N 93.89°W / 33.26; -93.89 (Fouke (May 2, EF1)) 2313 3.75 miles (6.04 km) Damage mostly to trees and power lines though a porch was blown off a home. There were 3 people injured.
Sources: SPC Storm Reports for May 2, 2009, NWS Shreveport (PIS), NWS Memphis, NWS Birmingham (PIS)

May 3 event

List of reported tornadoes - Sunday, May 3, 2009
EF#
Location
County/Parish
Coord.
Time (UTC)
Path length
Damage
Louisiana
EF0 SE of Castor Bienville 32.22°N 93.13°W / 32.22; -93.13 (Castor (May 3, EF0)) 1238 1.75 miles (2.82 km) Damage limited to trees and power lines
EF0 W of Quitman Bienville 32.36°N 92.81°W / 32.36; -92.81 (Quitman (May 3, EF0)) 1303 1.1 miles (1.8 km) Damage limited to trees
EF2 Dodson area Winn 32.08°N 92.66°W / 32.08; -92.66 (Dodson (May 3, EF2)) 1340 1.5 miles (2.4 km) 18 homes were damaged, some of them being destroyed. One mobile home was rolled off its foundation and destroyed, another was moved off 30 feet from its location and wrapped against the frame of another home. Two people were injured.
EF0 N of Harrisonburg Catahoula 31.80°N 91.79°W / 31.80; -91.79 (Harrisonburg (May 3, EF0)) 1351 3 miles (4.8 km) Damage limited to trees
Mississippi
EF0 SW of Thomastown Madison, Leake 1200 4 miles (6.4 km) Damage limited to trees
EF1 SW of Port Gibson Claiborne 31.89°N 91.06°W / 31.89; -91.06 (Port Gibson (May 3, EF1)) 1455 4.4 miles (7.1 km) Damage limited to trees
EF1 N of Clem Simpson, Jefferson Davis 31.75°N 89.79°W / 31.75; -89.79 (Clem (May 3, EF1)) 1607 10 miles (16 km) A travel trailer was destroyed while three chicken houses, a mobile home and a church were damaged. Trees were also uprooted or snapped
EF1 S of Mount Olive Covington, Smith 31.69°N 89.66°W / 31.69; -89.66 (Mount Olive (May 3, EF1)) 1612 18 miles (29 km) Damage to numerous trees, street signs and one house.
EF1 E of Taylorsville Smith, Jasper 31.83°N 89.36°W / 31.83; -89.36 (Taylorsville (May 3, EF1)) 1637 5.2 miles (8.4 km) One chicken house was destroyed, a second one damaged. A mobile and a shed had roof damaged and multiple trees were damaged.
EF1 NE of Stringer Jasper 31.90°N 89.23°W / 31.90; -89.23 (Stringer (May 3, EF1)) 1641 0.6 miles (0.97 km) Large pines were uprooted and snapped
Alabama
EF1 Sunshine Hale 32.56°N 87.55°W / 32.56; -87.55 (Sunshine (May 3, EF1)) 1832 0.05 miles (0.080 km) Brief tornado with roof damage to a barn and another structure. Trees were damaged.
EF0 Brook Highland Shelby 33.44°N 86.67°W / 33.44; -86.67 (Brook Highland (May 3, EF0)) 1853 0.45 miles (0.72 km) 20 homes had roof damage and numerous trees were uprooted
EF1 Dunavant Shelby 33.49°N 86.58°W / 33.49; -86.58 (Dunavant (May 3, EF1)) 1903 1.64 miles (2.64 km) Damage limited to uprooted or snapped trees
EF1 Wolf Creek St. Clair 33.51°N 86.40°W / 33.51; -86.40 (Wolf Creek (May 3, EF1)) 1927 16.58 miles (26.68 km) Damage limited to trees and power poles though some fell on structures
EF1 Stewart Crossroads St. Clair 33.54°N 86.46°W / 33.54; -86.46 (Stewarts Crossroads (May 3, EF1)) 2015 1 mile (1.6 km) Several trees fell including some on homes causing minor to moderate damage
EF1 E of Morgan City Marshall 34.46°N 86.56°W / 34.46; -86.56 (Morgan City (May 3, EF1)) 2040 0.25 miles (0.40 km) Damage to multiple trees and a shed
EF1 NE of Owens Crossroads Madison 2300 1.64 miles (2.64 km) Two homes were damaged along with numerous trees.
Tennessee
EF1 SW of Crossville Cumberland 35.91°N 85.09°W / 35.91; -85.09 (Crossville (May 3, EF1)) 2220 3.2 miles (5.1 km) Numerous trees uprooted or snapped some of them causing roof damage to some homes
Virginia
EF0 SW of Indian Valley Floyd 36.88°N 80.57°W / 36.88; -80.57 (Indian Valley (May 3, EF0)) 2302 1.07 miles (1.72 km) Damage to numerous trees and a few structures including a shed that was flattened.
North Carolina
EF0 N of Mayodan Rockingham 0038 1.3 miles (2.1 km) Damage to trees and three structures
Sources: SPC Storm Reports for May 3, 2009, NWS Birmingham, NWS Blacksburg, NWS Huntsville, NWS Jackson, MS (PIS), NWS Nashville, NWS Shreveport (PIS), NWS Jackson (Storm Summary)

May 4 event

List of reported tornadoes - Monday, May 4, 2009
EF#
Location
County/Parish
Coord.
Time (UTC)
Path length
Damage
Louisiana
EF1 Catahoula St. Martin 30.21°N 91.72°W / 30.21; -91.72 (Catahoula (May 4, EF1)) 1100 0.5 miles (0.80 km) A mobile home and camper trailer were destroyed with additional damage to several residences. One person was injured.
South Carolina
EF0 SSE of Cross Hill Laurens 34.26°N 81.98°W / 34.26; -81.98 (Cross Hill (May 4, EF0)) 2140 2 miles (3.2 km) Several trailers were damaged and moved, and an outbuilding was destroyed.
Virginia
EF0 Chesapeake area Chesapeake 2343 3 miles (4.8 km) Minor shingle damage to some homes and several trees being downed
Sources:NWS Lake Charles, NWS Greenville-Spartanburg, NWS Wakefield

May 5 event

List of reported tornadoes - Tuesday, May 5, 2009
EF#
Location
County
Coord.
Time (UTC)
Path length
Damage
North Carolina
EF0 N of Warsaw Duplin 1930 200 yards (180 m) Three turkey barns were damaged, one of them being destroyed
EF0 Moss Hill area Lenoir 2005 50 yards (50 m) Three tin roofs were peeled off turkey barns.
EF2 S of Bailey Johnson, Wilson 2025 12 miles (19 km) Significant damage to several homes. One building was destroyed. One person was injured.
EF1 Chicod area Pitt 2130 0.5 miles (0.80 km) Several outbuilings were heavily damaged and an automobile was thrown.
EF1 Antioch area Johnston, Nash 2230 7 miles (11 km) Damage to several structures including mobile homes, houses and a fire department, mostly to roofs. One mobile home was blown off its foundation injuring one person. Another mobile was moved slightly from its foundation.
Sources:NWS Newport/Morehead City, NC, NWS Raleigh, Storm Reports for May 5, 2009

May 6 event

List of reported tornadoes - Wednesday, May 6, 2009
EF#
Location
County
Coord.
Time (UTC)
Path length
Damage
Arkansas
EF1 W of Marvell Phillips 0703 100 yards (90 m) A supply feed store was damaged along with trees and power lines
EF1 NW of Monticello Drew 33.67°N 91.79°W / 33.67; -91.79 (Monticello (May 6, EF1)) 1000 2.1 miles (3.4 km)
EF0 NW of Immanuel Arkansas unknown 4.4 miles (7.1 km) Damage limited to trees
Mississippi
EF1 Lyon area Coahoma 0834 100 yards (90 m) Roof damage to one home and damage to several trees
EF1 SE of Weir Choctaw 1212 8.5 miles (13.7 km) A mobile home was destroyed by a tree, hundreds of trees were uprooted, five homes had light to moderate roof damage and a church and a mobile home had roof damage
EF1 W of Brooksville Noxubee 1243 3.5 miles (5.6 km) A church was moved off its blocks, several camp cabins were damaged, a tractor-trailer was overturned and several homes had roof damage from trees.
Alabama
EF1 Rogersville Camp area Pickens 33.18°N 88.27°W / 33.18; -88.27 (Rogersville Camp (May 6, EF1)) 1320 1 mile (1.6 km) Several trees were snapped and fell with some landing on trailers.
EF1 Carrollton area Pickens 33.27°N 88.10°W / 33.27; -88.10 (Carollton (May 6, EF1)) 1331 1.35 miles (2.17 km) Several trees were blown down damaging some homes
EF1 S of Caddo Lawrence, Morgan 34.51°N 87.13°W / 34.51; -87.13 (Caddo (May 6, EF1)) 1325 4.0 miles (6.4 km) Significant damage occurred to a mobile home and several trees were snapped and unrooted in the caddo area.
EF0 Decatur area Morgan 34.59°N 86.98°W / 34.59; -86.98 (Decatur (May 6, EF0)) 1343 0.75 miles (1.21 km) Several homes and vehicles were damaged by downed trees.
EF1 Barbee Creek area Tuscaloosa 33.47°N 87.64°W / 33.47; -87.64 (Barbee Creek (May 6, EF1)) 1348 0.48 miles (0.77 km) Two homes had moderate damage and a pontoon boat was overturned.
EF1 Lake Arnedra area Tuscaloosa 33.29°N 87.70°W / 33.29; -87.70 (Lake Arnedra (May 6, EF1)) 1357 0.23 miles (0.37 km) Two trees fell on houses, causing major damage to one of them.
EF2 Madison area Limestone, Madison 34.70°N 86.75°W / 34.70; -86.75 (Madison (May 6, EF2)) 1403 10.9 miles (17.5 km) Three residential subdivisions were hit by the tornado. Significant roof damage to several homes with others sustaining lesser damage including blown windows and minor roof damage. One large garage was flattened. Significant tree damage reported with one tree falling on a mobile home.
EF0 Jasper area Walker 33.83°N 87.23°W / 33.83; -87.23 (Jasper (May 6, EF0)) 1411 3.26 miles (5.25 km) Damage to a bank drive-through and ATM area as well as 40 cars at two car dealerships
EF1 Cordova area Walker 33.76°N 87.19°W / 33.76; -87.19 (Cordova (May 6, EF1)) 1420 1.03 miles (1.66 km) 15 homes and train cars were damaged by fallen trees.
EF0 Powellville area Walker 33.91°N 87.10°W / 33.91; -87.10 (Powellville (May 6, EF0)) 1420 0.25 miles (0.40 km) A carport was destroyed, a trampoline was carried 200 yards and several trees were snapped and uprooted.
EF0 Arkadelphia area Blount 33.90°N 86.89°W / 33.90; -86.89 (Arkadelphia (May 6, EF0)) 1445 0.95 miles (1.53 km) Brief touchdown where several trees were uprooted.
Virginia
EF0 SE of Galaxa Grayson, Carroll 0225 1.8 miles (2.9 km) Several trees were snapped or uprooted, one of them caused slight damage to a structure.
Sources:NWS Huntsville, NWS Memphis (PIS), NWS Little Rock (PIS), NWS Birmingham (PIS), NWS Blacksburg, VA, NWS Jackson, Storm Reports for May 5, 2009, Storm Reports for May 6, 2009

May 7 event

List of reported tornadoes - Thursday, May 7, 2009
EF#
Location
County
Coord.
Time (UTC)
Path length
Damage
North Carolina
EF0 SW of Vanceboro Craven 2230 100 yards (90 m) Minor damage to several mobile homes and houses
Missouri
EF0 W of Lock Springs Daviess 0100 unknown Damage limited to trees
Sources:NWS Kansas City, NWS Newport/Morehead City

May 8 event

List of reported tornadoes - Friday, May 8, 2009
EF#
Location
County
Coord.
Time (UTC)
Path length
Damage
Missouri
EF1 NW of Brighton Polk 37.48°N 93.37°W / 37.48; -93.37 (Brighton (May 8, EF1)) 1218 8.5 miles (13.7 km) Several outbuildings and barns were damaged or destroyed with heavy damage to some frame homes.
EF1 Republic area Greene 37.12°N 93.48°W / 37.12; -93.48 (Republic (May 8, EF1)) 1303 4 miles (6.4 km) 50 structures were damaged with two buildings uninhabitable.
EF1 SE of Willard Greene 37.26°N 93.38°W / 37.26; -93.38 (Willard (May 8, EF1)) 1306 1.1 miles (1.8 km) A few outbuildings were destroyed and one home sustained heavy damage
EF0 Ebenezer area Greene 37.33°N 93.31°W / 37.33; -93.31 (Willard (May 8, EF0)) 1315 unknown
EF2 W of Charity Dallas 37.51°N 93.05°W / 37.51; -93.05 (Charity (May 8, EF2)) 1330 4 miles (6.4 km) 1 death - Three frame homes and numerous outbuildings were destroyed. One person was also injured.
EF1 ESE of Garrison Christian, Douglas 36.82°N 92.97°W / 36.82; -92.97 (Garrison (May 8, EF1)) 1335 7 miles (11 km) Trees fell damaging two homes and several outbuildings
EF1 E of Fordland Webster 37.16°N 92.92°W / 37.16; -92.92 (Fordland (May 8, EF1)) 1345 4 miles (6.4 km) A dairy farm lost its roof, a truck was lofted over a fence and an outbuilding was destroyed
EF2 W of Goodhope Douglas 36.91°N 92.84°W / 36.91; -92.84 (Goodhope (May 8, EF2)) 1355 2 miles (3.2 km) One home lost its roof and several trees were snapped with treetops carried over a quarter of a mile
EF1 N of Ava Douglas 37.00°N 92.67°W / 37.00; -92.67 (Ava (May 8, EF1)) 1400 1 mile (1.6 km) A barn was destroyed and minor home damage.
EF1 NW of Hartville Wright 37.30°N 92.55°W / 37.30; -92.55 (Hartville (May 8, EF1)) 1402 3.5 miles (5.6 km) Several outbuildings were destroyed and numerous trees were uprooted.
EF1 SW of Wasola Ozark 36.76°N 92.61°W / 36.76; -92.61 (Wasola (May 8, EF1)) 1411 2 miles (3.2 km) Seven outbuildings were destroyed with three homes damaged as well as intense tree damage.
EF0 ESE of Mountain Grove Texas 37.12°N 92.19°W / 37.12; -92.19 (Mountain Grove (May 8, EF0)) 1422 3.5 miles (5.6 km) Several buildings were damaged and numerous trees were uprooted.
EF1 WNW of Peace Valley Howell 36.89°N 91.79°W / 36.89; -91.79 (Peace Valley (May 8, EF1)) 1435 9 miles (14 km) A few homes and numerous trees were damaged.
EF2 W of Mountain View to SE of Summersville Howell, Texas, Shannon 37.00°N 91.85°W / 37.00; -91.85 (Mountain View (May 8, EF2)) 1435 21 miles (34 km) A farm house was lifted and moved injuring two people. Two auto shops and several homes and outbuildings were damaged or destroyed. Numerous trees were snapped or uprooted.
EF2 SE of Lebanon Laclede 37.62°N 92.59°W / 37.62; -92.59 (Lebanon (May 8, EF2)) 1440 2.2 miles (3.5 km) Four homes and several outbuildings were damaged
EF1 ESE of Hazelton Texas 37.50°N 91.95°W / 37.50; -91.95 (Hazelton (May 8, EF1)) 1444 3.5 miles (5.6 km) One barn was destroyed and one mobile lost its roof.
EF2 SW of Alley Spring Shannon 1445 12 miles (19 km) Several buildings and a cabin at a sawmill were destroyed. There was extensive tree damage.
EF3 NW of Pomona Howell 36.88°N 91.93°W / 36.88; -91.93 (Pomona (May 8, EF3)) 1500 2.2 miles (3.5 km) One house, one mobile home, one travel trailer, two outbuildings and an auto shop were destroyed. Cars were tossed 40 to 50 yards away and two school buses were blown over.
EF0 McBride area Perry 1620 2.2 miles (3.5 km) Damage limited to trees. Tornado caught on tape.
EF1 SE of Fredericktown Madison unknown 0.5 miles (0.80 km)
EF1 N of Ellington Reynolds unknown 2 miles (3.2 km) 2 homes had roof damage with significant tree damage.
EF2 N of Merritt Douglas unknown 3 miles (4.8 km) Two homes and several outbuildings were damaged with numerous trees snapped and debarked by a large wedge tornado.
Illinois
EF1 WSW of Du Quoin Jackson 37.95°N 89.40°W / 37.95; -89.40 (Du Quoin (May 8, EF1)) 1630 3 miles (4.8 km) Structural damage to two barns, shingle damage to homes, power poles blown over and dozens of trees snapped or uprooted.
EF1 N of Thompsonville Franklin, Williamson 1945 5 miles (8.0 km) Damage to trees in rural areas
EF0 N of Royalton Franklin unknown unknown Brief tornado touchdown that was photographed.
Kentucky
EF1 E of Hiseville Barren, Metcalfe 37.11°N 85.80°W / 37.11; -85.80 (Hiseville (May 8, EF1)) 1904 4 miles (6.4 km) Three outbuildings were destroyed and one home and a pole barn were damaged.
EF3 S of Richmond Garrard, Madison, Estill 37.68°N 84.37°W / 37.68; -84.37 (Richmond (May 8, EF3)) 2055 at least 22 miles (35 km) 2 deaths - Heavy damage to several homes. Cars flipped over. A total of 12 to 20 people were injured.
EF0 NW of Irvine Estill 2123 less than 0.25 miles (0.40 km) Two structures had metal roofing torn off. Several trees were knocked down including one that damaged the porch of a home.
Tennessee
EF2 SE of Huntsville Scott unknown 4.5 miles (7.2 km) Seven homes were damaged and a free standing cellphone tower collapsed.
EF2 SW of Tazewell Claiborne unknown 2.2 miles (3.5 km) Two large barns were destroyed and one home lost its roof.
EF1 NE of Thorn Hill Grainger, Hancock 36.40°N 83.34°W / 36.40; -83.34 (Thorn Hill (May 8, EF1)) 2336 3.5 miles (5.6 km) Heavy damage to barns and outbuildings with roof damage to homes and numerous downed trees.
EF0 S of Gray Washington 36.40°N 82.48°W / 36.40; -82.48 (Gray (May 8, EF0)) 0045 unknown Tornado touchdown reported/confirmed by law enforcement. No damage reported.
EF0 NW of Etowah McMinn unknown 0.1 miles (0.16 km) Brief tornado with damage to several trees.
Virginia
EF0 N of Clintwood Dickenson 37.18°N 82.46°W / 37.18; -82.46 (Clintwood (May 8, EF0)) 0100 0.75 miles (1.21 km) Trees were uprooted, one of them fell on a mobile home. Minor roof damage to two homes.
EF2 SE of Pound Wise 0145 1.7 miles (2.7 km) Two trailers and several outbuildings were destroyed. A third trailer was damaged.
EF0 NW of Lebanon Russell 0225 0.1 miles (0.16 km)
EF2 NE of Lebanon Russell 0230 1.1 miles (1.8 km) One barn was destroyed, one home had moderate damage and 100 trees were snapped or uprooted
North Carolina
EF2 NW of Ennice Alleghany 36.56°N 81.03°W / 36.56; -81.03 (Ennice (May 8, EF2)) 0344 5 miles (8.0 km) A mobile home was destroyed with 4 people injured. 5 homes and several outbuildings were damaged and cement silos were toppled. There were two additional injuries.
EF1 SW of Ennice Alleghany 0346 0.25 miles (0.40 km) Three outbuildings were destroyed and one home and a pole barn were damaged

See also

References

  1. May 3, 2009 1630 UTC Day 1 Convective Outlook Storm Prediction Center. Accessed 2009-05-03.
  2. http://www.srh.noaa.gov/shv/productview.php?head=NEW&pil=PNS&sid=SHV&version=
  3. "SPC Storm Reports for 05/03/09". Storm Prediction Center. Retrieved 2009-05-03.
  4. http://www.spc.noaa.gov/climo/reports/090503_rpts.html
  5. Lundberg, Joe (2009-05-08). "Mesocyclone and Derecho Highlight the Friday Follies". Accuweather. Retrieved 2009-05-08.
  6. "Significant Wind Damage and Tornadoes - May 8th, 2009". Springfield, MO: The National Weather Service. 2009. Retrieved 24 May 2019.
  7. "May 8, 2009 1630 UTC Day 1 Convective Outlook". Storm Prediction Center. 2009-05-08. Retrieved 2009-05-08.
  8. http://www.spc.noaa.gov/products/watch/ww0264.html
  9. http://www.spc.noaa.gov/products/watch/ww0267.html
  10. Associated Press (2009-05-08). "Storms leave four dead in Midwest". KGAN. Archived from the original on June 15, 2011. Retrieved 2009-05-08.
  11. "Storm may bring high wind, rain". The Courier-Journal. 2009-05-08. Archived from the original on 2013-01-20. Retrieved 2009-05-08.
  12. Staff Report (2009-05-08). "Powerful storm system roars through Tri-State". Evansville Courier & Press. Retrieved 2009-05-08.
  13. http://www.spc.noaa.gov/climo/reports/090508_rpts.html
  14. Skilling, Tom (May 8, 2009). "Derecho called one of the worst of the past decade". WGN-TV. Archived from the original on July 18, 2011. Retrieved June 29, 2009.
  15. Woodall (2009-05-03). "Public Information Statement". Dallas/Fort Worth, Texas: National Weather Service. Archived from the original on 2009-05-03. Retrieved 2009-05-03.
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