Chicago weather remains unsettled heading into the weekend, with a severe storm threat Friday evening that brings the possibility of tornadoes and flooding.

KANSAS CITY, Mo. — The immediate Kansas City area is included in a severe thunderstorm watch through 10 p.m. Friday night. The National Weather Service says hail up to the size of ping pong balls, winds up to 70 miles per hour and frequent lightning are possible with the storms that develop.

After a long night yesterday of severe weather, we are keeping a watch on some more potentially severe storms for this evening. Most of our area is under a Tornado Watch until 8PM tonight with an

An updated tornado warning was issued by the National Weather Service on Tuesday at 5:52 p.m. in effect until 6:30 p.m. for Bucks, Montgomery and Philadelphia counties.

Spectators of the INDYCAR race at Iowa Speedway were forced to take shelter during a tornado warning on Friday. A message over the speedway's speakers advises people take shelter.

After an afternoon filled with tornado sirens, lightning strikes, torrential rain and visible cloud rotation near Iowa Speedway, IndyCar canceled Friday afternoon practice.