A cold front interacted with a warm and humid airmass to produce clusters of severe thunderstorms during the late afternoon and evening of May 21st.  Most of the storms were concentrated in a corridor from far southeastern McLean and northern Piatt counties southeastward across Champaign, Vermilion, northern Douglas, and northern Edgar counties.  Very large hail up to the size of grapefruits was reported near Tuscola in Douglas County.  In addition, thunderstorm cells repeatedly training over the same locations produced flash flooding in two narrow corridors across east central Illinois.

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:25:00 to 21-MAY-14 15:26:00 (CST-6)
Location: TUSCOLA
Magnitude: 4.00 
Property damage: 100.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Hail caused significant damage to the roofs, windows, and siding of numerous houses in Tuscola. Hundreds of vehicles sustained major window and body damage. Two men were injured when they were struck in the head by large hailstones.

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 17:06:00 to 21-MAY-14 17:15:00 (CST-6)
Location: (CMI)WILLARD FLD CHA
Magnitude: 1.75 
Property damage: 800.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant hail damage at Willard Airport in Savoy.  Damage to several vehicles as well as minor damage to a B-17 aircraft.

Hail in VERMILION, ILLINOIS
From 21-MAY-14 14:05:00 to 21-MAY-14 14:06:00 (CST-6)
Location: ROSSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACON, ILLINOIS
From 21-MAY-14 14:14:00 to 21-MAY-14 14:15:00 (CST-6)
Location: ARGENTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DE WITT, ILLINOIS
From 21-MAY-14 14:20:00 to 21-MAY-14 14:21:00 (CST-6)
Location: FARMER CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in CHAMPAIGN, ILLINOIS
From 21-MAY-14 19:00:00 to 21-MAY-14 23:30:00 (CST-6)
Location: SELLERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A second band of persistent rain from numerous thunderstorms tracking over the same areas in Champaign County produced 2.50 to 3.00 inches in less than two hours during the early evening hours east of Urbana. Most streets in St. Joseph and Ogden were flooded. Numerous rural roads in extreme east central Champaign County were impassable. State Highway 49 and Interstate 74 from mile post 191 to 198 were impacted and traffic was stopped at times.

Hail in VERMILION, ILLINOIS
From 21-MAY-14 14:15:00 to 21-MAY-14 14:16:00 (CST-6)
Location: ROSSVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in VERMILION, ILLINOIS
From 21-MAY-14 14:35:00 to 21-MAY-14 14:36:00 (CST-6)
Location: WEST NEWELL
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in PIATT, ILLINOIS
From 21-MAY-14 14:40:00 to 21-MAY-14 14:41:00 (CST-6)
Location: BEMENT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 15:00:00 to 21-MAY-14 15:01:00 (CST-6)
Location: SAVOY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:06:00 to 21-MAY-14 15:07:00 (CST-6)
Location: TUSCOLA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:07:00 to 21-MAY-14 15:08:00 (CST-6)
Location: TUSCOLA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:10:00 to 21-MAY-14 15:11:00 (CST-6)
Location: TUSCOLA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:14:00 to 21-MAY-14 15:15:00 (CST-6)
Location: TUSCOLA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:05:00 to 21-MAY-14 15:15:00 (CST-6)
Location: TUSCOLA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail fell for 10 minutes with the largest stones the size of golf balls.

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:35:00 to 21-MAY-14 15:36:00 (CST-6)
Location: CAMARGO
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:55:00 to 21-MAY-14 15:56:00 (CST-6)
Location: NEWMAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in EDGAR, ILLINOIS
From 21-MAY-14 16:00:00 to 21-MAY-14 16:01:00 (CST-6)
Location: BROCTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PIATT, ILLINOIS
From 21-MAY-14 16:20:00 to 21-MAY-14 16:21:00 (CST-6)
Location: WHITE HEATH
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 16:37:00 to 21-MAY-14 16:38:00 (CST-6)
Location: TOLONO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 17:01:00 to 21-MAY-14 17:02:00 (CST-6)
Location: CHAMPAIGN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 17:15:00 to 21-MAY-14 17:16:00 (CST-6)
Location: PHILO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 17:20:00 to 21-MAY-14 17:25:00 (CST-6)
Location: PHILO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in VERMILION, ILLINOIS
From 21-MAY-14 18:41:00 to 21-MAY-14 18:42:00 (CST-6)
Location: SIDELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in EDGAR, ILLINOIS
From 21-MAY-14 19:06:00 to 21-MAY-14 19:07:00 (CST-6)
Location: CHRISMAN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 19:10:00 to 21-MAY-14 19:11:00 (CST-6)
Location: MAHOMET
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 19:15:00 to 21-MAY-14 19:16:00 (CST-6)
Location: MAHOMET
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Thunderstorm Wind in CHAMPAIGN, ILLINOIS
From 21-MAY-14 14:58:00 to 21-MAY-14 15:03:00 (CST-6)
Location: SAVOY
Magnitude: 52.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous power poles were blown down on Rising Road 3 miles west of Savoy.

Thunderstorm Wind in CHAMPAIGN, ILLINOIS
From 21-MAY-14 16:35:00 to 21-MAY-14 16:40:00 (CST-6)
Location: TOLONO
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Mesonet

A large tree was blown onto a train in Tolono.  A 6-foot tree was split in half and numerous small branches were blown down around town.

Flash Flood in CHAMPAIGN, ILLINOIS
From 21-MAY-14 18:00:00 to 21-MAY-14 23:30:00 (CST-6)
Location: SEYMOUR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Persistent rain from numerous thunderstorms tracking over the same areas produced 3.00 to 4.00 inches in less than two hours during the early evening hours. Numerous roads were impassable in Savoy, Tolono and rural areas of south central Champaign County. U.S. Highway 45 and State Route 130 were also significantly impacted and closed in spots.

Flash Flood in PIATT, ILLINOIS
From 21-MAY-14 17:30:00 to 21-MAY-14 23:00:00 (CST-6)
Location: LODGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent rain from numerous thunderstorms tracking over the same areas produced 3.00 inches in less than two hours during the early evening hours in a small part of east central Piatt County. Numerous rural roads were impassable, streets in White Heath were flooded, and Interstate 72 in the vicinity of White Heath was impacted.

Flash Flood in DOUGLAS, ILLINOIS
From 21-MAY-14 21:00:00 to 22-MAY-14 00:00:00 (CST-6)
Location: NEWMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Persistent rain from numerous thunderstorms tracking over the same areas produced 2.50 to 3.00 inches in less than two hours during the early evening hours in a small portion of northeast Douglas County. Numerous rural roads were impassable and closed as a result.

Flash Flood in VERMILION, ILLINOIS
From 21-MAY-14 19:45:00 to 22-MAY-14 00:30:00 (CST-6)
Location: HUMRICK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two bands of persistent rain from numerous thunderstorms tracking over the same areas in central and southern Vermilion County produced 3.00 to 4.00 inches in less than two hours during the evening. Numerous rural roads in central and southern Vermilion County were impassable. State Highway 1 from Georgetown to the Edgar County Line and Interstate 74 from mile post 198 to 203 were impacted and traffic was stopped at times.

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:41:00 to 21-MAY-14 15:42:00 (CST-6)
Location: HINDSBORO
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 14:58:00 to 21-MAY-14 14:59:00 (CST-6)
Location: CHAMPAIGN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CHAMPAIGN, ILLINOIS
From 21-MAY-14 18:24:00 to 21-MAY-14 18:25:00 (CST-6)
Location: BROADLANDS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in EDGAR, ILLINOIS
From 21-MAY-14 20:30:00 to 22-MAY-14 00:30:00 (CST-6)
Location: PALERMO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent rain from numerous thunderstorms tracking over the same areas produced 3.00 to 4.00 inches in less than two hours during the early evening hours in a portion of northern Edgar County. Most streets in Chrisman were flooded. U.S. Highways 150 and 36 were significantly impacted and traffic was stopped at times. Numerous rural roads were impassable and closed as a result.

Hail in DOUGLAS, ILLINOIS
From 21-MAY-14 15:16:00 to 21-MAY-14 15:17:00 (CST-6)
Location: TUSCOLA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter