CHICAGO (CBS) — A tornado warning has been issued for La Porte County and is in effect until 7:30 p.m.

A severe thunderstorm warning has been issued for La Porte County, Indiana until 6:30 p.m.

Cook County also experienced a severe thunderstorm before 5 p.m.

Strong winds and hail are likely, along with heavy downpours.

Hail and heavy rain hit Wrigley Field around 4:40 p.m.

Here is a radar image of the storm around the same time.

A severe thunderstorm watch has been issued and is in effect until 9 p.m. Tuesday.

The biggest threat will likely be this afternoon through about 6 p.m. Wind gusts up to 60 miles per hour are possible.

Hail, up to quarter-sized, is also possible in some of these storms.

The strongest storms are expected north of Interstate 88.

Another storm system is expected overnight, affecting the southern part of Chicagoland. Right now it looks like areas south of I-80 could have storms very early tomorrow morning, between 2 a.m. and 4 a.m.

FULL TEXT OF COOK COUNTY WARNING

The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for… East central Cook County in northeastern Illinois… * Until 500 PM CDT. * At 436 PM CDT, a severe thunderstorm was located over Humboldt Park, or near Chicago, moving east at 35 mph. HAZARD…60 mph wind gusts and quarter size hail. SOURCE…Radar indicated. IMPACT…Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include… Chicago, Cicero, Oak Park, Lincoln Park, Navy Pier, Northerly Island, Lakeview, Humboldt Park, Logan Square and Douglas Park. Including the following interstates… I-55 between mile markers 292 and 294. I-94 between mile markers 44 and 54. I-290 between mile markers 23 and 29. I-294 between mile markers 44 and 54. This includes… Lincoln Park Zoo, Soldier Field, University of Illinois Chicago, Wrigley Field, The Loop, Museum Campus, and Northerly Island. PRECAUTIONARY/PREPAREDNESS ACTIONS… For your protection move to an interior room on the lowest floor of a building. Frequent cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature’s leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && HAIL…1.00IN WIND…60MPH