Severe thunderstorms, bringing the threat of large hail, flooding downpours and damaging winds are developing over portions of the northern Plains and Midwest.
AccuWeather.com Meteorologist Brian Edwards said there are two areas of concern for severe weather into tonight.
"The first of which will be across Illinois and northeast Missouri from the Chicago area to the northern suburbs of St. Louis," he said. "Storms will continue to fire across this region into the evening hours, producing a threat for damaging wind gusts to 70 mph and large, damaging hail."
The second area of concern is located across the High Plains from Nebraska through western Minnesota with an enhanced threat for damaging wind gusts and large, destructive hail. Edwards added that hailstones could reach the size of baseballs in parts of the Dakotas and Nebraska.
UPDATES: (All times are listed in Central time)
6:29 p.m. CDT Saturday: Due to thunderstorms in the area, ground stops are in effect at Chicago O'Hare International Airport and Chicago Midway Airport.
6:27 p.m. CDT Saturday:
Tonight's #Cubs game vs the #Pirates is currently delayed due to rain.— Chicago Cubs (@Cubs) June 21, 2014
6:21 p.m. CDT Saturday:
#Chicagoweather @NWSChicago flooded alley in Jefferson Park area on NW side of #Chicago #ChiWx #ILWx pic.twitter.com/xamAR0JfxP— WindyCityWxMan (@WindyCityWxMan) June 21, 2014
5:58 p.m. CDT Saturday:
The storms to our west have produced over 750 lightning strikes in the last 15 minutes— NWS Northern Indiana (@NWSIWX) June 21, 2014
5:47 p.m. CDT Saturday:
542 PM CDT: 0.9" of rain at Chicago-O'Hare in 20 minutes! Do not attempt to drive onto any flooded roadways. Turn Around, Don't Drown!— NWS Chicago (@NWSChicago) June 21, 2014
5:43 p.m. CDT Saturday:
The tarp is going on at Wrigley Field so the start of the game will be delayed https://t.co/RxOikYLSCJ— Pittsburgh Pirates (@Pirates) June 21, 2014
5:27 p.m. CDT Saturday: Golf ball-sized hail near Horace, Kansas, law enforcement reports.
5:14 p.m. CDT Saturday:
Picture: Severe-warned storm moving through Bureau County #IL via @planebuci #ilwx pic.twitter.com/5OA3VaRHdi— AviWxChasers (@AviWxChasers) June 21, 2014
5:13 p.m. CDT Saturday: NWS spotter reports 2.7 inches of rain has fallen near Versailles, IL in the past hour and a half.
5:06 p.m. CDT Saturday: Wind gusts up to 70 mph recorded in Hawthorn Woods, Illinois, reports NWS spotter.
4:47 p.m. CDT Saturday:
60 to 70 mph winds reported 6 miles northeast of Java at 415 pm CDT. #sdwx— NWS Aberdeen (@NWSAberdeen) June 21, 2014
4:44 p.m. CDT Saturday Possible tornado headed into the northern suburbs of Chicago, said AccuWeather.com Meteorologist Brian Edwards. Reports of trees down around Round Lake Beach.
3:56 p.m. CDT Saturday: Winds gusts up to 52 mph recorded near Deer Creek, Illinois.
3:47 p.m. CDT Saturday: Golf ball-sized hail in Astoria, Illinois reports emergency management.