CHICAGO — A Severe Thunderstorm Watch is in effect for 13 counties across Illinois and Indiana until 10 p.m. Friday. Damaging winds, hail up to one inch, and isolated tornadoes are the primary threats.
The watch covers Cook, DeKalb, DuPage, Grundy, Kane, Kankakee, Kendall, Lake, LaSalle, McHenry and Will counties in Illinois, plus Lake and Newton counties in Indiana.
Storms will develop west of the city by early afternoon. They intensify as they move east. The peak severe risk window is 3 p.m. to 6 p.m.
Exact Timeline: When Storms Hit
| Time Block | Location | Threat Level |
|---|---|---|
| 12 p.m. – 3 p.m. | West of Chicago; DeKalb, Kane, Kendall | Scattered showers; isolated storms |
| 3 p.m. – 6 p.m. | Chicago, Cook County, northern suburbs | Peak severe risk; hail, wind, tornado chance |
| 6 p.m. – 10 p.m. | Southern suburbs, NW Indiana | Storms shift east; gusty winds linger |
The forecast calls for the strongest cells to produce wind gusts up to 60 mph. That is enough to bring down tree limbs and cause scattered power outages.
Primary Threats: Hail, Wind, Tornadoes
Hail up to one inch in diameter is possible in the most intense storms. Tornado risk is low but not zero.
The highest tornado potential exists where storms interact with pre-existing boundaries. That includes parts of Cook and DuPage counties.
DuPage County activated tornado sirens Friday morning by error. Officials confirmed it was a false alarm. The actual risk remains isolated.
How This System Compares
Wednesday’s system produced scattered showers. This Friday system is more potent.
A cold front combined with atmospheric instability will fuel stronger updrafts. ABC7, NBC 5, and FOX 32 all agree on the severe potential.
The forecast models show a higher convective available potential energy (CAPE) value than Wednesday. That translates to taller storm clouds and more intense downbursts.
City vs. Suburbs: Risk Distribution
Cook and DuPage carry the highest tornado risk due to convergence zones. Lake County, Illinois and Lake County, Indiana will see storms later, but they remain severe.
The urban heat island effect may enhance storm intensity over downtown Chicago. Expect stronger wind gusts in the Loop compared to rural areas.
Safety Precautions
Charge devices before 2 p.m. Have a weather radio ready. Know your safe room location.
Avoid travel between 3 p.m. and 6 p.m. if possible. Sign up for local emergency alerts.
If a tornado warning is issued, act immediately. Go to a basement or interior room on the lowest floor. Do not wait for visual confirmation.
FAQ
Will schools dismiss early? Check individual district announcements. No county-wide mandate exists.
When does the severe threat end? The watch expires at 10 p.m. Storms should exit by midnight.
Watch vs. warning? A watch means conditions are favorable. A warning means the hazard is imminent or occurring.
How to track in real-time? Use ABC7, NBC 5, or FOX 32 mobile apps. Radar loops update every 5 minutes.
Final Forecast Summary
Storms peak between 3-6 p.m. Hail and wind are the primary threats. The watch remains until 10 p.m.
The weekend forecast shows drier conditions and lower humidity. Sunday will be mostly sunny with highs near 80°F.
Stay weather-aware throughout Friday. Monitor local alerts. Have multiple ways to receive warnings.
Stay safe, Chicago – and keep your eyes on the sky.
💡 Frequently Asked Questions (FAQ)
- Q: What time will severe storms hit Chicago on Friday?
- A: The peak severe risk window is from 3 p.m. to 6 p.m. CDT, with storms developing west of the city in the early afternoon and moving east.
- Q: What are the primary threats from the storms?
- A: The primary threats are damaging winds up to 60 mph, hail up to one inch in diameter, and isolated tornadoes.
- Q: Which counties are under the Severe Thunderstorm Watch?
- A: The watch covers Cook, DeKalb, DuPage, Grundy, Kane, Kankakee, Kendall, Lake, LaSalle, McHenry, and Will counties in Illinois, plus Lake and Newton counties in Indiana.
Extended Reading
For continuous radar updates and live coverage, refer to ABC7 Chicago’s 24/7 live stream, NBC 5 Storm Team forecasts, and FOX 32 Chicago’s weather alerts. These outlets provide real-time storm cell tracking and county-level warnings. The forecast data cited in this report originates from these three sources.