A deepening area of low pressure tracked from near Kansas City during the afternoon of December 10th to southern Lake Michigan by the pre-dawn hours of December 11th.  An unseasonably warm and moist airmass surged northward ahead of the system, resulting in high temperatures reaching the lower to middle 60s across central Illinois.  As the low and an associated vigorous short-wave trough interacted with the moderately unstable and highly sheared environment, several clusters of strong to severe thunderstorms developed during the late afternoon and evening of the 10th.  Numerous rotating cells were observed, with a total of 6 tornadoes touching down across central Illinois.  5 of the tornadoes were rated EF-2, including one that injured a person just north of Herrick in Shelby County.

Thunderstorm Wind in SHELBY, ILLINOIS
From 10-DEC-21 21:50:00 to 10-DEC-21 21:55:00 (CST-6)
Location: WINDSOR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were blown down and power poles were bent along Route 16 just northeast of Windsor.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-DEC-21 20:25:00 to 10-DEC-21 20:30:00 (CST-6)
Location: CHATHAM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were blown down near Route 4 and Cottonwood Drive south of Walgreens.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 10-DEC-21 20:16:00 to 10-DEC-21 20:21:00 (CST-6)
Location: PARKLAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous power poles were blown down and siding was damaged on a house along Weir Road between Jacob Road and Wagonseller Road.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 10-DEC-21 20:19:00 to 10-DEC-21 20:24:00 (CST-6)
Location: PEKIN MUNI ARPT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A farm irrigation unit was flipped into a ditch on Goeken Road just east of Route 29.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 10-DEC-21 20:31:00 to 10-DEC-21 20:36:00 (CST-6)
Location: LESLIE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The dome was blown off the salt storage building at the Tazewell County Highway Department.

Thunderstorm Wind in EFFINGHAM, ILLINOIS
From 10-DEC-21 23:06:00 to 10-DEC-21 23:11:00 (CST-6)
Location: BEECHER CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Several power lines were blown down.

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-DEC-21 20:36:00 to 10-DEC-21 20:41:00 (CST-6)
Location: BUFFALO
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several power poles were blown down.

Thunderstorm Wind in MACON, ILLINOIS
From 10-DEC-21 21:44:00 to 10-DEC-21 21:49:00 (CST-6)
Location: PRAIRIE HALL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large evergreen trees were damaged.

Thunderstorm Wind in CHAMPAIGN, ILLINOIS
From 10-DEC-21 22:10:00 to 10-DEC-21 22:15:00 (CST-6)
Location: OGDEN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A machine shed was destroyed.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 10-DEC-21 20:20:00 to 10-DEC-21 20:25:00 (CST-6)
Location: MORTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree branch was blown down.

Thunderstorm Wind in TAZEWELL, ILLINOIS
From 10-DEC-21 20:25:00 to 10-DEC-21 20:30:00 (CST-6)
Location: LESLIE
Magnitude: 74.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in EDGAR, ILLINOIS
From 10-DEC-21 23:35:00 to 10-DEC-21 23:40:00 (CST-6)
Location: EDGAR CTY ARPT PARIS
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in COLES, ILLINOIS
From 10-DEC-21 22:51:00 to 10-DEC-21 22:56:00 (CST-6)
Location: (MTO)MATTOON/CHRLSTN
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in SANGAMON, ILLINOIS
From 10-DEC-21 20:33:00 to 10-DEC-21 20:38:00 (CST-6)
Location: (SPI)SPRINGFIELD ARP
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in LAWRENCE, ILLINOIS
From 10-DEC-21 22:22:00 to 10-DEC-21 22:27:00 (CST-6)
Location: LAWRENCEVILLE ARPT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in MACON, ILLINOIS
From 10-DEC-21 21:44:00 to 10-DEC-21 21:49:00 (CST-6)
Location: PRAIRIE HALL
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in COLES, ILLINOIS
From 10-DEC-21 21:58:00 to 10-DEC-21 22:04:00 (CST-6)
Location: MAGNET
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado crossed from Moultrie County into western Coles County just south of Western Avenue at 9:58 PM CST.  Several houses and outbuildings were damaged in western Coles County...from west of Mattoon to northeast of Mattoon.  The most
significant damage included a one-story brick house that had it's roof entirely removed and 2 large metal storage buildings that sustained roof, siding, and metal support structure damage.  The tornado lifted about 4 miles north-northeast of Mattoon at 10:04 PM.

Tornado in VERMILION, ILLINOIS
From 10-DEC-21 22:43:00 to 10-DEC-21 22:44:00 (CST-6)
Location: RIDGE FARM
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado crossed from Edgar County into southeastern Vermilion County at 10:43 PM CST.  No additional damage was observed as the tornado quickly lifted about 2 miles east-southeast of Ridge Farm at 10:44 PM CST.

Tornado in SHELBY, ILLINOIS
From 10-DEC-21 21:50:00 to 10-DEC-21 21:54:00 (CST-6)
Location: WINDSOR
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down 1 mile south of Windsor at 9:50 PM CST.  The tornado stripped roof panels off a farm outbuilding, then tracked northeastward and strengthened causing total destruction of a small farm outbuilding and breaking wood power poles southeast of Windsor.  It crossed into southern Moultrie County about 1 mile southwest of Gays just south of Route 16 at 9:54 PM CST.

Tornado in MOULTRIE, ILLINOIS
From 10-DEC-21 21:54:00 to 10-DEC-21 21:58:00 (CST-6)
Location: GAYS
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado crossed from Shelby County into southern Moultrie County about 1 mile southwest of Gays at 9:54 PM CST.  An agriculture services plant was significantly damaged west of Gays, with numerous buildings destroyed and 3 large tanker trucks flipped.  The tornado continued northeastward and crossed into western Coles County just south of Western Avenue at 9:58 PM CST.

Tornado in MENARD, ILLINOIS
From 10-DEC-21 20:07:00 to 10-DEC-21 20:16:00 (CST-6)
Location: ATTERBERRY
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down about one half mile east of Atterberry at 8:07 PM CST.  The tornado tracked northeastward, significantly damaging a pair of metal sheds along Pin Hook Avenue.  It mainly passed through open fields until reaching a farm along Masters Avenue about a half mile west of Fairgrounds Street where a machine shed was destroyed and a couple other outbuildings were damaged.  The worst damage was along Altig Bridge Avenue about a half mile east of Fairgrounds Street.  A house sustained significant damage to its roof, several trees were snapped, and sheds across the road were damaged or destroyed.  From this point, the tornado mainly traveled in farm fields, overturning an irrigation pivot before lifting just shy of the Sangamon River at 8:16 PM CST.

Tornado in SHELBY, ILLINOIS
From 10-DEC-21 21:26:00 to 10-DEC-21 21:36:00 (CST-6)
Location: HERRICK
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado crossed from Fayette County in the National Weather Service St. Louis County Warning Area (CWA) into southern Shelby County in the National Weather Service Lincoln County Warning Area (CWA) at 9:26 PM CST.   It downed several large wood power poles about 2 miles west of Herrick.  The most significant damage occurred to a residence 1 mile north of Herrick where an addition to a house saw significant damage, causing injury to one person.  The tornado continued northeastward, damaging several outbuildings and downing trees and power lines.  The tornado lifted 2 miles northwest of Cowden at about 9:36 PM CST.

Tornado in EDGAR, ILLINOIS
From 10-DEC-21 22:41:00 to 10-DEC-21 22:43:00 (CST-6)
Location: CHRISMAN
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down 3 miles north of Chrisman at 10:41 PM CST.  The greatest damage was concentrated along County Road 2650 North just east of US-150.  A farmstead at this location had several grain bins damaged and a machine shed lost large portions of its roof.  The tornado crossed into southeastern Vermilion County at 10:43 PM CST.

Tornado in CASS, ILLINOIS
From 10-DEC-21 19:47:00 to 10-DEC-21 19:59:00 (CST-6)
Location: VIRGINIA
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down about 4 miles south-southwest of Virginia at 7:47 PM CST.  The tornado tracked northeastward, heavily damaging a farmstead on Parlier Road about a half mile west of highway 78.  Here, a house had significant damage to its roof  and several farm buildings were completely demolished.  One horse was killed and another injured.  The tornado crossed highway 78 about a half mile north of Prairie Creek.  It damaged approximately 15 power poles on Conover Road and overturned several storage tanks nearby.  After crossing highway 125 about 2 miles southeast of Virginia, the remainder of the track mainly consisted of damage to trees.  It crossed much of the Panther Creek Fish & Wildlife Area before lifting about 2 miles west-northwest of Newmansville at 7:59 pm.

Tornado in COLES, ILLINOIS
From 10-DEC-21 22:18:00 to 10-DEC-21 22:22:00 (CST-6)
Location: RARDIN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down about one quarter of a mile east of Rardin at 10:18 PM CST.  The tornado did only tree damage with the greatest concentration through the wooded areas along the Embarras River.  Evidence that the tornado was on the ground was also found along East County Road 1750 North.  The tornado lifted 1 mile east of Oakland at 10:22 PM CST.

Thunderstorm Wind in MORGAN, ILLINOIS
From 10-DEC-21 19:30:00 to 10-DEC-21 19:35:00 (CST-6)
Location: MEREDOSIA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree branches were blown down.

Thunderstorm Wind in LOGAN, ILLINOIS
From 10-DEC-21 20:50:00 to 10-DEC-21 20:55:00 (CST-6)
Location: LATHAM
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several power poles were snapped along 600th Street just west of 2400th Avenue.

Thunderstorm Wind in COLES, ILLINOIS
From 10-DEC-21 22:00:00 to 10-DEC-21 22:05:00 (CST-6)
Location: MATTOON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A semi was blown over near the Rural King Distribution Center.