(KMOV) -- The National Weather Service has confirmed that a tornado touched down in the Metro-East on Monday evening.
The National Weather Service conducted a survey of the damage and found that a single tornado struck west of O'Fallon, Ill. and continued to just south of Mascoutah, Ill. a path about 10 miles long.
The majority of the damage registered as EF0-EF1, the least powerful ranking on the Enhanced Fujita Scale. ( )
However, EF2 damage was reported south of Mascoutah on Jefferson Road west of Highway 4 where a farm house was destroyed. Two people were home, but unharmed, when the tornado struck.
The tornado was about one-tenth of a mile wide.
About 1,200 Ameren customers remained without power Tuesday afternoon.
Bob Knight, director of the St. Clair County Emergency Management Agency, says that early estimates indicate that the tornado caused $1 million worth of damage to approximately 100 buildings. 85 of those building were in the O'Fallon/Shiloh area and the other 15 were in Mascoutah.