Supercells developed and moved across southern Illinois. The supercells raced east-northeast at 50 to 60 mph as a strong storm system moved northeast from Oklahoma to lower Michigan with it's associated cold front sweeping east across the Ohio and Tennessee valleys. Strong wind shear with the storm system combined with warm, moist and unstable air provided the fuel for supercell thunderstorms.

Thunderstorm Wind in JACKSON, ILLINOIS
From 02-MAR-12 12:27:00 to 02-MAR-12 12:27:00 (CST-6)
Location: CARBONDALE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, ILLINOIS
From 02-MAR-12 11:22:00 to 02-MAR-12 11:22:00 (CST-6)
Location: ELKVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dime size hail was reported just west of Elkville.

Hail in JACKSON, ILLINOIS
From 02-MAR-12 11:23:00 to 02-MAR-12 11:23:00 (CST-6)
Location: WARD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime size hail was reported about 2 miles west of Ward.

Hail in HAMILTON, ILLINOIS
From 02-MAR-12 12:00:00 to 02-MAR-12 12:00:00 (CST-6)
Location: MC LEANSBORO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in FRANKLIN, ILLINOIS
From 02-MAR-12 11:25:00 to 02-MAR-12 11:25:00 (CST-6)
Location: CHRISTOPHER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported in Christopher.

Hail in WILLIAMSON, ILLINOIS
From 02-MAR-12 11:29:00 to 02-MAR-12 11:29:00 (CST-6)
Location: BUSH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, ILLINOIS
From 02-MAR-12 11:33:00 to 02-MAR-12 11:33:00 (CST-6)
Location: CARBONDALE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime size hail was reported at the Southern Illinois University Airport.

Hail in FRANKLIN, ILLINOIS
From 02-MAR-12 11:39:00 to 02-MAR-12 11:39:00 (CST-6)
Location: WEST FRANKFORT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, ILLINOIS
From 02-MAR-12 11:42:00 to 02-MAR-12 11:42:00 (CST-6)
Location: BENTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in HAMILTON, ILLINOIS
From 02-MAR-12 12:14:00 to 02-MAR-12 12:14:00 (CST-6)
Location: THURBER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WHITE, ILLINOIS
From 02-MAR-12 12:22:00 to 02-MAR-12 12:22:00 (CST-6)
Location: CARMI
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WHITE, ILLINOIS
From 02-MAR-12 12:32:00 to 02-MAR-12 12:32:00 (CST-6)
Location: GRAYVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar size hail was reported just south of Grayville.

Hail in MASSAC, ILLINOIS
From 02-MAR-12 13:20:00 to 02-MAR-12 13:20:00 (CST-6)
Location: NEW COLUMBIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in FRANKLIN, ILLINOIS
From 02-MAR-12 11:41:00 to 02-MAR-12 11:41:00 (CST-6)
Location: WEST FRANKFORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, ILLINOIS
From 02-MAR-12 11:41:00 to 02-MAR-12 11:41:00 (CST-6)
Location: WEST FRANKFORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSON, ILLINOIS
From 02-MAR-12 12:55:00 to 02-MAR-12 12:55:00 (CST-6)
Location: NEW BURNSIDE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball size hail was reported.

Thunderstorm Wind in WHITE, ILLINOIS
From 02-MAR-12 12:24:00 to 02-MAR-12 12:24:00 (CST-6)
Location: CARMI
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Power lines were blown down.

Tornado in WHITE, ILLINOIS
From 02-MAR-12 12:28:00 to 02-MAR-12 12:31:00 (CST-6)
Location: CARMI
Tornado F-scale: EF0
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The tornado touchdown was witnessed by the county emergency management director. The intermittent damage path followed County Road 1100 fairly closely. Near the beginning of the track, a body shop was damaged. Some tree and power line damage occurred. A metal carport was blown away.

Hail in FRANKLIN, ILLINOIS
From 02-MAR-12 11:44:00 to 02-MAR-12 11:44:00 (CST-6)
Location: GROAT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in FRANKLIN, ILLINOIS
From 02-MAR-12 11:48:00 to 02-MAR-12 11:48:00 (CST-6)
Location: THOMPSONVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in WILLIAMSON, ILLINOIS
From 02-MAR-12 11:57:00 to 02-MAR-12 11:57:00 (CST-6)
Location: STIRITZ
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud was reported along Interstate 57 between Benton and West Frankfort.

Funnel Cloud in SALINE, ILLINOIS
From 02-MAR-12 12:03:00 to 02-MAR-12 12:03:00 (CST-6)
Location: GALATIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in MASSAC, ILLINOIS
From 02-MAR-12 13:16:00 to 02-MAR-12 13:16:00 (CST-6)
Location: ROUND KNOB
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WHITE, ILLINOIS
From 02-MAR-12 12:31:00 to 02-MAR-12 12:31:00 (CST-6)
Location: CARMI
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous power lines were blown down.

Hail in JOHNSON, ILLINOIS
From 02-MAR-12 12:53:00 to 02-MAR-12 12:53:00 (CST-6)
Location: TUNNEL HILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter