This blog post distills the latest forecast into a clear briefing: two rounds of potentially severe storms are on the horizon for northern Illinois and nearby areas, with a warm-up on Sunday followed by a potent cold front late Monday into Tuesday.
After the storms, temperatures will fall and conditions will dry out somewhat midweek.
The piece highlights the main hazards—damaging winds, large hail, and the potential for a tornado spin-up—and offers practical safety guidance for residents as alerts evolve.
Two rounds of potentially severe storms this weekend and early next week
Forecasters expect storms to develop overnight Saturday into Sunday, with a few possibly severe as they press north from northern Illinois. Sunday’s temperatures rebound into the upper 70s to low 80s, setting the stage for additional afternoon storms—especially farther north—that could also be severe.
Monday is flagged as an Alert Day, signaling a more significant round of severe weather likely along a cold front late Monday into Tuesday morning.
Round 1: Overnight Saturday into Sunday
Storms are anticipated to roll in overnight Saturday into Sunday, with the potential for severe development as they move into northern Illinois. Sunday’s weather brings a warm rebound, with highs in the upper 70s to low 80s.
The risk for additional storms exists through Sunday afternoon, particularly in the northern zones. The main hazards for this first round include strong winds and hail, with the possibility of a few severe cells.
Saturday night into early Sunday also carries a 30–40% chance of rain and thunderstorms, accompanied by breezy winds and muggy, humid conditions. People should stay weather-aware and prepare for quickly changing conditions overnight.
Round 2: Late Monday into Tuesday
The second and more significant round of severe weather is expected along a cold front late Monday into Tuesday morning. The primary threats are damaging winds and large hail, with an isolated spin-up tornado possible in some environments.
After the cold front passes, showers may linger into Tuesday, but the atmosphere is not expected to support widespread severe weather by then. Temperatures will take a notable dive after the front, cooling into the low to mid 60s from Wednesday through Friday.
Temperature trends and the short-term outlook
In the days surrounding the weekend events, temperatures are forecast to swing significantly. Sunday brings a rebound into the upper 70s and low 80s, while Monday’s system and the associated cold front switch the pattern to cooler air by midweek.
By Wednesday through Friday, highs are expected to stay in the mid-60s and lows in the mid-40s. The overall setup points to a notable cooldown regardless of whether all planned storm modes verify.
Safety reminders and preparedness steps
With two rounds of potentially severe weather on the timetable, it’s prudent to stay ahead of the changing forecast.
Here are practical steps residents can take to stay safe and minimize disruption:
- Monitor reliable forecast updates and heed any Alert Day advisories from local weather services.
- Secure loose outdoor items, vehicles, and toys that could become hazards in strong winds.
- Prepare an emergency kit with flashlights, batteries, water, and essential medications in case of power outages.
- Identify the safest place in your home for shelter during a severe storm, away from windows and heavy objects.
- Charge mobile devices and keep a battery-powered radio on hand for storm alerts if power outages occur.
- Avoid driving through flooded roadways and give emergency responders room to work if warnings are issued.
Here is the source article for this story: Storms arrive later Saturday night, ALERT DAY conditions Sunday and Monday