Local expert estimates up to 50,000 cars suffered hail damage.
Repairs could take a month or more; bargains abound.
National Weather Service says tornado warning was issued for St. Clair County, Illinois, Saturday afternoon.
The hailstorm swept through St. Charles County early Friday morning.
Hail quickly piles up, turning ground white.
Repairs should be completed so weekend events can go on
Weather Service anticipating 70mph winds, hail, and tornadoes
On tap for tonight: tornadoes, hail, damaging winds.
First of two storm systems also dropped damaging hail on the St. Louis region.