The following events were reported: Hail, Thunderstorm Wind, Tornado. These occurred near station USW00013994, approximately 23.4547 km away, between 2021-12-10 19:32:00 and 2021-12-10 20:04:00. The events included records with hailstones measuring 50.666666666666664 inches.The events resulted in 2 injuries and 1 fatalities. The events caused property damage valued at 3452000.0 and crop damage of 0.0. Episode Narrative: 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. Numerous severe thunderstorms formed ahead of an approaching cold front during the late afternoon and evening of Friday December 10th, 2021. Event Narrative: Thunderstorm winds blew down a large section of fence near Chesterfield Mall. After crossing into St. Louis County the tornado caused extensive tree damage along the river, a mere half mile from a large outlet mall. It crossed Highway 40/61/Interstate 64 east of the Boone Bridge causing minor damage to vehicles that were on the highway. The tornado continued northeast, crossing the Missouri River again, back into St. Charles County near Greens Bottom Road. Widespread wind damage across Franklin County. A large tree was blown down onto roadway along St. Louis Inn Road about 5 miles southwest of St. Clair. Another large tree was blown down on to Highway 47 near intersection with Eastview Drive. On the southwest side of Union, several power lines were blown down at the intersection of Koelling Avenue and West Springfield Avenue. About 3 miles north northwest of Moselle, there were numerous trees damaged or uprooted, as well as damage to a car port, power lines blown down and damage to several roofs. Several trees were blown over on the northwest side of Pacific. Several street lights were blown over in town. Thunderstorm winds blew a large tree down onto an apartment building causing moderate damage. The tornado developed about a third of a mile northeast of the intersection of Highway 94 and Osage Ridge Road in southwestern St. Charles County around 7:32 PM CDT. As it moved to the northeast, two houses sustained minor damage and one outbuilding was destroyed on Highway T, just north of intersection with Hemsath Road. The tornado continued northeast and strengthened as it approached Highway F, northwest of Defiance. Multiple homesteads and farms suffered varying degrees of property damage along Highway F to Highway 94. Two homes were completely destroyed. The first home was 110 years old and did not appear to have any anchoring to the concrete foundation. The second home just 100 yards east of the first was swept clean to the subfloor, which was still anchored to the concrete foundation. One fatality and two injuries occurred at this location. The damage was rated EF3 with winds to 165 mph. The tornado continued northeast, crossing the Missouri River and Howell Island before entering St. Louis County in Chesterfield Valley. Dollar amount damage is estimated around $3.4 million. Once back in St. Louis County, there was additional tree damage and other minor damage noted. The tornado lifted at 8:01 PM before entering the Hollywood Casino Amphitheatre Complex. Overall, the entire tornado (St. Charles/St. Louis counties) was rated EF3 with a path length of 27.30 miles and a max path width of 150 yards. There was one death and two injuries with this tornado. Dollar amount damage is estimated around $3.4 million in St. Charles County. After crossing back into St. Charles County there was additional tree damage, broken power poles, and structural damage noted along Greens Bottom Road. The tornado crossed the Missouri River a third and final time, back into St. Louis County traveling across Highway 364 and north of the Creve Coeur Airport.