Numerous strong to severe thunderstorms occurred in the warm sector of a low pressure system over central Missouri. The air mass in the warm sector was very unstable, with afternoon mixed-layer cape values in the 2500 to 4000 j/kg range. A 65 to 75 knot mid level jet was located across Arkansas, with the nose of the jet moving into western Kentucky. This feature enhanced the lift and strong deep-layer shear already in place, creating an environment very favorable for supercells and tornadoes. A 40 to 55 knot low level jet across eastern Arkansas moved into western Kentucky during the evening, resulting in isolated tornadoes and widespread damaging winds.

Thunderstorm Wind in POPE, ILLINOIS
From 25-MAY-11 18:16:00 to 25-MAY-11 18:18:00 (CST-6)
Location: BRISTOL
Magnitude: 87.00 EG
Property damage: 120.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A major downburst with winds up to 100 mph occurred. Part of the roof was torn off a house, including the decking. The front porch was blown off the house. A hog barn was unroofed, and a grain bin was blown over. A pole barn and a cattle barn were destroyed. At least a dozen trees were snapped or uprooted.

Thunderstorm Wind in SALINE, ILLINOIS
From 25-MAY-11 18:36:00 to 25-MAY-11 18:36:00 (CST-6)
Location: ELDORADO
Magnitude: 56.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

A 100-year-old oak tree was uprooted, taking power and phone lines down. The tree roots damaged a water main, causing water levels in the town's water tower to drop sharply. Numerous streets were blocked by downed trees and limbs around town. Four power poles were broken by downed trees. In downtown Eldorado, hundreds of roofing shingles littered the streets.

Tornado in UNION, ILLINOIS
From 25-MAY-11 17:39:00 to 25-MAY-11 17:42:00 (CST-6)
Location: ANNA
Tornado F-scale: EF1
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Several dozen trees were uprooted or snapped. A vehicle was destroyed by a falling tree. At least a couple of buildings and houses sustained mostly minor roof damage, including the loss of some shingles. Peak winds were estimated near 90 mph. The average path width was 100 yards.

Thunderstorm Wind in WABASH, ILLINOIS
From 25-MAY-11 19:00:00 to 25-MAY-11 19:00:00 (CST-6)
Location: MT CARMEL
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous tree limbs and a couple of trees were blown down. One uprooted tree fell onto the back end of a school bus. Tree limbs fell on power lines, causing scattered power outages.

Thunderstorm Wind in JOHNSON, ILLINOIS
From 25-MAY-11 18:03:00 to 25-MAY-11 18:03:00 (CST-6)
Location: VIENNA
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A house in Vienna received major structural damage as a large uprooted tree fell across the middle of it. Extensive water damage occurred as rain fell through a hole in the roof. A parked car was crushed by a falling tree.

Thunderstorm Wind in MASSAC, ILLINOIS
From 25-MAY-11 18:15:00 to 25-MAY-11 18:20:00 (CST-6)
Location: ROUND KNOB
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Measured wind gusts from 60 to 65 mph persisted for several minutes.

Thunderstorm Wind in EDWARDS, ILLINOIS
From 25-MAY-11 18:46:00 to 25-MAY-11 18:46:00 (CST-6)
Location: ALBION
Magnitude: 56.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were blown down. One tree landed on a mobile home just south of the city.

Thunderstorm Wind in SALINE, ILLINOIS
From 25-MAY-11 18:19:00 to 25-MAY-11 18:19:00 (CST-6)
Location: CARRIERS MILLS
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous trees and tree limbs were blown down.

Thunderstorm Wind in JOHNSON, ILLINOIS
From 25-MAY-11 18:12:00 to 25-MAY-11 18:12:00 (CST-6)
Location: TUNNEL HILL
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

A barn was scattered across U.S. Highway 45. Several roads were closed due to trees across them.

Thunderstorm Wind in MASSAC, ILLINOIS
From 25-MAY-11 18:22:00 to 25-MAY-11 18:22:00 (CST-6)
Location: METROPOLIS
Magnitude: 55.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down on a mobile home. A wind gust was measured to 63 mph.

Thunderstorm Wind in WHITE, ILLINOIS
From 25-MAY-11 18:25:00 to 25-MAY-11 18:25:00 (CST-6)
Location: ENFIELD
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

The roof of a home was damaged.

Thunderstorm Wind in JACKSON, ILLINOIS
From 25-MAY-11 17:45:00 to 25-MAY-11 17:45:00 (CST-6)
Location: CARBONDALE
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

Numerous large tree limbs were blown down onto streets and power lines.

Thunderstorm Wind in FRANKLIN, ILLINOIS
From 25-MAY-11 18:00:00 to 25-MAY-11 18:00:00 (CST-6)
Location: BENTON
Magnitude: 52.00 EG
Property damage: 9.00K
Crop damage: 0.00K
Reported by: Newspaper

A few trees were blown down. Two of the trees took down power lines.

Hail in SALINE, ILLINOIS
From 25-MAY-11 17:56:00 to 25-MAY-11 17:56:00 (CST-6)
Location: TISON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in JACKSON, ILLINOIS
From 25-MAY-11 17:38:00 to 25-MAY-11 17:38:00 (CST-6)
Location: DE SOTO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in ALEXANDER, ILLINOIS
From 25-MAY-11 17:45:00 to 25-MAY-11 17:45:00 (CST-6)
Location: URBANDALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The funnel cloud was reported north of Cairo along Interstate 57.

Funnel Cloud in WILLIAMSON, ILLINOIS
From 25-MAY-11 18:00:00 to 25-MAY-11 18:00:00 (CST-6)
Location: SCOTSBORO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The funnel cloud was reported at Interstate 57 and Highway 13.

Funnel Cloud in HAMILTON, ILLINOIS
From 25-MAY-11 18:22:00 to 25-MAY-11 18:22:00 (CST-6)
Location: THACKERAY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Funnel Cloud in WABASH, ILLINOIS
From 25-MAY-11 18:43:00 to 25-MAY-11 18:43:00 (CST-6)
Location: BELLMONT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in WABASH, ILLINOIS
From 25-MAY-11 18:40:00 to 25-MAY-11 18:40:00 (CST-6)
Location: MT CARMEL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WABASH, ILLINOIS
From 25-MAY-11 18:43:00 to 25-MAY-11 18:43:00 (CST-6)
Location: BELLMONT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FRANKLIN, ILLINOIS
From 25-MAY-11 17:38:00 to 25-MAY-11 17:38:00 (CST-6)
Location: MULKEYTOWN
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts were estimated up to 80 mph by emergency management officials.

Thunderstorm Wind in WILLIAMSON, ILLINOIS
From 25-MAY-11 17:53:00 to 25-MAY-11 17:53:00 (CST-6)
Location: COLP
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JEFFERSON, ILLINOIS
From 25-MAY-11 17:47:00 to 25-MAY-11 17:47:00 (CST-6)
Location: MT VERNON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated wind gusts up to 60 mph.

Thunderstorm Wind in FRANKLIN, ILLINOIS
From 25-MAY-11 18:01:00 to 25-MAY-11 18:01:00 (CST-6)
Location: ORIENT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A state trooper estimated wind gusts up to 80 mph.

Thunderstorm Wind in PERRY, ILLINOIS
From 25-MAY-11 17:28:00 to 25-MAY-11 17:28:00 (CST-6)
Location: DU QUOIN
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Funnel Cloud in WILLIAMSON, ILLINOIS
From 25-MAY-11 17:46:00 to 25-MAY-11 17:46:00 (CST-6)
Location: HURST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in WHITE, ILLINOIS
From 25-MAY-11 18:14:00 to 25-MAY-11 18:14:00 (CST-6)
Location: CARMI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in WHITE, ILLINOIS
From 25-MAY-11 18:10:00 to 25-MAY-11 18:10:00 (CST-6)
Location: CARMI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in UNION, ILLINOIS
From 25-MAY-11 17:46:00 to 25-MAY-11 17:46:00 (CST-6)
Location: ANNA
Magnitude: 61.00 EG
Property damage: 90.00K
Crop damage: 0.00K
Reported by: Public

Portable garage buildings were rolled over in Anna. A tree fell on a house in Anna, causing heavy damage to the roof. At Jonesboro, an antenna was ripped off the city hall, leaving a hole in the building. Bricks were blown off the Jonesboro city hall building, and there was some roof damage. Trees and power lines were blown down. Tree limbs fell on houses in Jonesboro.

Tornado in PULASKI, ILLINOIS
From 25-MAY-11 17:55:00 to 25-MAY-11 17:59:00 (CST-6)
Location: NEW GRAND CHAIN
Tornado F-scale: EF0
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado was very weak as it touched down along the Ohio River. In this area, trees were uprooted, and a few trees were snapped. At a campground east of Grand Chain, several campers were damaged, and one was overturned. Peak winds were estimated near 70 mph. The tornado remained weak as it crossed into Massac County.

Tornado in JOHNSON, ILLINOIS
From 25-MAY-11 18:07:00 to 25-MAY-11 18:14:00 (CST-6)
Location: CROSSROADS
Tornado F-scale: EF1
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado crossed into Johnson County from Massac County in the vicinity of Interstate 24. A barn was destroyed just before where the tornado crossed Interstate 24. Significant tree damage was observed near the community of Ganntown, where trees were snapped and uprooted and a home had minor damage. The metal roof of the house was damaged. On the west side of Grantsburg, a 20-by-50 foot pole barn was destroyed, and swirls were seen in tall grass. Near the end of the damage path in the Shawnee National Forest, over 100 trees were snapped or uprooted. Peak winds were estimated near 100 mph. The average path width was 150 yards.

Funnel Cloud in PERRY, ILLINOIS
From 25-MAY-11 16:12:00 to 25-MAY-11 16:12:00 (CST-6)
Location: PINCKNEYVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in UNION, ILLINOIS
From 25-MAY-11 17:54:00 to 25-MAY-11 17:54:00 (CST-6)
Location: COBDEN
Magnitude: 65.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A mobile home was flipped over. A large maple tree about three feet in diameter was uprooted. A two-foot tree was snapped in half. A small apple tree was uprooted.

Funnel Cloud in SALINE, ILLINOIS
From 25-MAY-11 17:30:00 to 25-MAY-11 17:30:00 (CST-6)
Location: HARRISBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A supercell thunderstorm produced a cone-shaped funnel cloud that passed directly over Harrisburg. The funnel cloud was well-documented by photographers and videographers. The funnel cloud was associated with a strong tornadic signature on doppler radar. Witnesses reported the funnel cloud was rotating and descending toward the ground as it passed downtown Harrisburg. No touchdowns were observed.

Tornado in MASSAC, ILLINOIS
From 25-MAY-11 17:59:00 to 25-MAY-11 18:07:00 (CST-6)
Location: HILLERMAN
Tornado F-scale: EF2
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado gained strength after crossing into Massac County from Pulaski County. North of the Mermet Lake Conservation Area, the tornado reached peak intensity. A barn was destroyed, and debris was thrown several hundred yards. Two grain bins were destroyed, including one that was thrown over 265 yards. Other small outbuildings were destroyed. There was minor to moderate damage to four homes from falling trees and strong winds. As the tornado moved northeast, it damaged a house near the Massac/Johnson County line. The back porch was ripped off. Trees were snapped and thrown into a vehicle and garage. There was roof, siding, soffit, and shutter damage to the home as well. In a nearby field, an irrigation system was overturned. The tornado funnel was photographed from a residence near Round Knob. Peak winds were estimated near 115 mph. The average path width was 300 yards. The tornado continued northeast into Johnson County.

Thunderstorm Wind in UNION, ILLINOIS
From 25-MAY-11 17:34:00 to 25-MAY-11 17:34:00 (CST-6)
Location: WARE
Magnitude: 60.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees and power poles were blown down.

Thunderstorm Wind in WILLIAMSON, ILLINOIS
From 25-MAY-11 17:55:00 to 25-MAY-11 17:55:00 (CST-6)
Location: HERRIN
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A half dozen trees were blown down. Widespread power outages were reported throughout the community due to blown transformers.

Thunderstorm Wind in MASSAC, ILLINOIS
From 25-MAY-11 18:03:00 to 25-MAY-11 18:03:00 (CST-6)
Location: BOAZ
Magnitude: 56.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large trees were blown down in the far western part of the county.

Thunderstorm Wind in JOHNSON, ILLINOIS
From 25-MAY-11 18:05:00 to 25-MAY-11 18:05:00 (CST-6)
Location: GOREVILLE
Magnitude: 61.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees were blown down. Some homes received minor damage.

Thunderstorm Wind in SALINE, ILLINOIS
From 25-MAY-11 18:26:00 to 25-MAY-11 18:30:00 (CST-6)
Location: HARRISBURG
Magnitude: 70.00 EG
Property damage: 80.00K
Crop damage: 0.00K
Reported by: Emergency Manager

In Harrisburg, numerous trees were blown down, and signs were blown over. Several roofs were damaged. Siding was ripped off a building. The area of greatest damage was in a neighborhood on the southeast side of Harrisburg, where a microburst about one mile long and one-third mile wide downed hundreds of trees and limbs. A garage was flattened by an uprooted tree. Winds in the microburst were estimated near 75 mph. A trained spotter seven miles west of Harrisburg estimated winds gusted to 60 mph.

Thunderstorm Wind in WHITE, ILLINOIS
From 25-MAY-11 18:45:00 to 25-MAY-11 18:45:00 (CST-6)
Location: GRAYVILLE
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

A commercial building was damaged in downtown Grayville. A portion of the front of the building collapsed. Windows were broken. Doors were blown in. Numerous trees were knocked down. One tree fell onto a porch, causing extensive damage. Another tree landed on a mobile home, but damage was minimal.

Heavy Rain in WHITE, ILLINOIS
From 25-MAY-11 18:15:00 to 25-MAY-11 19:15:00 (CST-6)
Location: GRAYVILLE
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rains poured beneath the back doors of a restaurant and bar, flooding both establishments. Estimates placed 2.5 to 3 inches of rain of rain in about 30 minutes.

Hail in SALINE, ILLINOIS
From 25-MAY-11 17:23:00 to 25-MAY-11 17:23:00 (CST-6)
Location: CARRIERS MILLS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf-ball size hail fell on Route 13 just west of Harrisburg. Quarter-size hail fell in Carrier Mills. Nickel-size hail fell in Harrisburg.

Tornado in JEFFERSON, ILLINOIS
From 25-MAY-11 17:28:00 to 25-MAY-11 17:44:00 (CST-6)
Location: WOODLAWN
Tornado F-scale: EF2
Property damage: 4.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

At least three houses lost portions of roof substructure, including roof decking. Numerous other homes sustained various degrees of shingle damage. Some houses lost siding. A total of 101 residences sustained damage, with 23 of those homes deemed uninhabitable. A folded up pop-up camper and adjacent shed were blown 50 to 75 feet. Dozens of trees and power poles were snapped. A twin-pole wooden tower carrying high-voltage power lines was leaning. The community of Boyd was directly impacted. In Boyd, a large machine shed/sawmill was destroyed. A church lost some shingles and roofing. There were numerous eyewitnesses and at least one photo of the tornado funnel. Peak winds were estimated near 115 mph. The average path width was 200 yards.

Thunderstorm Wind in GALLATIN, ILLINOIS
From 25-MAY-11 18:36:00 to 25-MAY-11 18:42:00 (CST-6)
Location: EQUALITY
Magnitude: 78.00 EG
Property damage: 400.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A microburst with estimated peak winds near 90 mph struck the south side of Equality and continued northeast to the intersection of Highways 13 and 1. The path width averaged about one-half mile. Two mobile homes were destroyed and a barn was levelled on the south side of Equality. A section of metal roof about 250 feet long was blown off the county high school near the intersection of Illinois Routes 13 and 1. Several other homes sustained mainly minor roof damage. Trees and tree limbs were blown down throughout the area.

Tornado in PULASKI, ILLINOIS
From 25-MAY-11 17:45:00 to 25-MAY-11 17:58:00 (CST-6)
Location: PULASKI
Tornado F-scale: EF1
Property damage: 40.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Mainly tree damage was observed. Some trees were uprooted and snapped. One small shed was damaged. There was minor damage to business roofs in Pulaski. Some straight-line wind damage was observed on the southeast end of the path. Peak winds were estimated near 90 mph. The average path width was 100 yards.

Tornado in PULASKI, ILLINOIS
From 25-MAY-11 17:40:00 to 25-MAY-11 17:47:00 (CST-6)
Location: MOUND CITY
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado moved northeast across Mound City, where much of the damage occurred. One small mobile home was picked up and thrown into a power pole. There was roof damage to several homes, mainly shingles. Numerous trees were uprooted and snapped. The tornado damage path ended at the Ohio River. Peak winds were estimated near 105 mph. The average path width was 200 yards.