Numerous severe thunderstorms formed ahead of an approaching cold front during the late afternoon and evening of Friday December 10th, 2021.  Large hail, damaging winds and five tornadoes occurred across central and eastern Missouri as well as south central Illinois.  Unfortunately two of the tornadoes were very strong (rated EF-3 on the Enhanced Fujita Scale) and responsible for 7 fatalities (one near Defiance, Missouri and six at an Amazon Facility near Edwardsville, Illinois). The Defiance, MO tornado tracked within one mile of the NWS St. Louis office in the Missouri Research Park near Weldon Spring, MO leading to the staff sheltering while NWS Kansas City provided service backup.  This is only the third time in the office's existence that the staff had to shelter. The damage from the Defiance, MO EF3 tornado was estimated at $684,186 and is unknown for the remaining tracks at this time but early estimates are well into the millions due to the damage sustained at the Amazon facility near Edwardsville, IL.

Thunderstorm Wind in JERSEY, ILLINOIS
From 10-DEC-21 20:09:00 to 10-DEC-21 20:09:00 (CST-6)
Location: JERSEYVILLE
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down a metal sign and numerous tree limbs on the east side of town along Illinois Route 16.

Tornado in FAYETTE, ILLINOIS
From 10-DEC-21 21:12:00 to 10-DEC-21 21:27:00 (CST-6)
Location: BINGHAM
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

As it tracked to the northeast across Fayette County, it moved through Bingham, snapping additional trees. The tornado intensified and widened as it moved across the southeast portion of Ramsey State Park and across US Highway 51 north of Ramsey. The tornado continued to track northeast, crossing IL Route 14 around 2 miles west of Herrick, continuing into Shelby County (WFO Lincoln IL County Warning Area). The tornado was rated EF1 in Fayette County with a path length of 14.8 miles and a max path width of 690 yards. No injuries or deaths were reported in Fayette County.

Thunderstorm Wind in PIKE, ILLINOIS
From 10-DEC-21 19:11:00 to 10-DEC-21 19:15:00 (CST-6)
Location: PERRY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Pike County dispatch reported three to four trees blown down at the intersection of Illinois Routes 104 and 107.  In Griggsville, a transformer was blown and several power lines were blown down.

Thunderstorm Wind in GREENE, ILLINOIS
From 10-DEC-21 19:43:00 to 10-DEC-21 20:00:00 (CST-6)
Location: CARROLLTON
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A hay wagon was blown onto U.S. Highway 67 between White Hall and Carrolton. In Carrolton, a couch was blown onto U.S. Highway 67. In Greenfield, several power lines were blown down.

Thunderstorm Wind in MACOUPIN, ILLINOIS
From 10-DEC-21 20:33:00 to 10-DEC-21 20:40:00 (CST-6)
Location: BUNKER HILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down a large tree onto Illinois Route 159 about a mile south of Bunker Hill. Several power lines were blown down onto School House Road east of intersection with Dorchester Road.

Tornado in MADISON, ILLINOIS
From 10-DEC-21 20:27:00 to 10-DEC-21 20:35:00 (CST-6)
Location: MITCHELL
Tornado F-scale: EF3
Property damage: 5.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado began on the south side of I-270 around three-quarters of a mile west of the I-270/I-255 interchange at 8:27 PM CST. Damage in this area consisted of several downed highway signs and a bent light pole. The tornado moved northeast and intensified rapidly after crossing I-255, striking an Amazon warehouse. The west-facing walls of the warehouse collapsed inward, which was followed by multiple structural failures as the tornado moved through the complex, including the collapse of additional walls and the loss of a large segment of the roof. This was the worst damage along the entire tornado track rated EF-3. Cars in the rear of the building were strewn eastward and power lines and several large high tension towers were also destroyed. There was one person injured and 6 fatalities at the Amazon facility. The tornado weakened as it moved northeast across Sand Road, where it destroyed an unanchored mobile home and an outbuilding, snapped trees, and downed power poles. Damage in this area was rated EF-1. Further northeast, the tornado crossed South University Drive where it snapped a power pole and downed additional trees. It then crossed into the Sunset Hills Country Club subdivision. Throughout a portion of the subdivision, there were downed trees, snapped branches, and superficial home damage consisting of missing shingles or small portions of roof covering. The tornado weakened further as it moved northeast, and lifted just west of Butler Boulevard at 8:35 PM CST. Noteworthy is debris from the Amazon warehouse was found along the entire track of this storm, tens of miles to the northeast of the warehouse. Overall, the tornado was rated EF3 with a path length of 4.22 miles and max path width of 300 yards. Six deaths and one injured were reported.

Thunderstorm Wind in PIKE, ILLINOIS
From 10-DEC-21 18:57:00 to 10-DEC-21 18:57:00 (CST-6)
Location: EL DARA
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large trees were blown down along County Highway 4 near El Dara.

Thunderstorm Wind in MONTGOMERY, ILLINOIS
From 10-DEC-21 22:38:00 to 10-DEC-21 22:38:00 (CST-6)
Location: NOKOMIS
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down a large tree in town.

Thunderstorm Wind in MONTGOMERY, ILLINOIS
From 10-DEC-21 22:35:00 to 10-DEC-21 22:38:00 (CST-6)
Location: COFFEEN
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several trees and caused minor damage to a machine shed in Coffeen. Also, several power lines around town in Fillmore.

Tornado in MONTGOMERY, ILLINOIS
From 10-DEC-21 21:03:00 to 10-DEC-21 21:12:00 (CST-6)
Location: DONNELLSON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

As it moved northeast into Montgomery County 3.2 miles east of Donnellson, it moved over the southern portion of Coffeen Lake. The damage in this area consisted of downed and snapped trees rated EF-1. As the tornado continued northeast, it crossed IL Route 185 where it destroyed an outbuilding, snapped trees, and downed power lines. Near the intersection of School House Avenue and Dads Trail, extensive tree damage was observed. Further northeast, the tornado crossed Fillmore Lake, moving into Fayette County.   The tornado was rated EF1 in Montgomery County with a path length of 10.11 miles and a max path width of 300 yards. No injuries or deaths were reported in Montgomery County.

Tornado in BOND, ILLINOIS
From 10-DEC-21 20:53:00 to 10-DEC-21 21:03:00 (CST-6)
Location: SORENTO
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado first touched down south of Sorento on New Douglas Road (Bond County), west of Sorento Reservoir, where it snapped several trees. The tornado moved northeast, passing 3.2 miles east of Donnellson crossing Mt. Moriah Avenue, moving into southern Montgomery County.  The tornado was rated EF1 in Bond County with a path length of 8.94 miles and a max path width of 150 yards. No injuries or deaths were reported in Bond County.

Thunderstorm Wind in BOND, ILLINOIS
From 10-DEC-21 22:28:00 to 10-DEC-21 22:28:00 (CST-6)
Location: RENO
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several trees and power lines just northwest of Reno.