Weather Update: Heavy Rainfall and Flash Flooding in Chicago Area
After heavy rainfall led to shuttered roadways and flash flood warnings in the Chicago area on Friday, more precipitation this evening could lead to another round of flooding ahead of storms to start the weekend.
While some storms will start impacting the region this evening, rainfall is likely to intensify overnight. With humidity remaining at very high levels, any precipitation could quickly turn to torrential rainfall.
Flash Flooding Threats and Storms
As significant storms have already impacted the region on Thursday and earlier Friday, a threat of flash flooding exists across northern Illinois and northwest Indiana.
Additional storms will develop this evening and especially overnight. With such a humid airmass in place, any storm will produce torrential rain rates with a threat for flash flooding. If you live in a flood-prone area, ensure you have multiple ways to get warnings tonight. pic.twitter.com/2pHhQU1DBm
— NWS Chicago (@NWSChicago) July 25, 2025
Storms Expected on Saturday
From there, additional storms are likely to materialize Saturday afternoon, primarily impacting areas along and south of Interstate 80.
Although there’s only a marginal risk of severe weather, a few storms could reach severe levels alongside more potential flash flooding and damaging winds.
This system is most likely to impact the southern parts of the Chicago area between 1 p.m. and 8 p.m. Saturday.
After a stormy night, additional storms are expected tomorrow afternoon primarily along and south of I-80. A few storms may be severe with flash flooding and damaging winds. #ILwx #INwx pic.twitter.com/QEb32GHa8y
— NWS Chicago (@NWSChicago) July 25, 2025
Weekend Weather Outlook
Periodic thunderstorms are likely to persist through the weekend before heat and humidity return to start next week, with highs climbing back into the 90s by Sunday.
Periodic storms will prevail tonight into Saturday before heat and humidity recharges for early next week. Periodic storms may occur again at some point next week, as well. #ILwx #INwx pic.twitter.com/7uCQlW787e
— NWS Chicago (@NWSChicago) July 25, 2025
Conclusion
In conclusion, the Chicago area is expected to experience heavy rainfall and flash flooding throughout the weekend. Residents are advised to stay informed about weather updates and take necessary precautions to ensure their safety. The storms are expected to intensify overnight, with a marginal risk of severe weather on Saturday. It’s essential to stay prepared and have multiple ways to receive weather warnings, especially if you live in a flood-prone area.
Frequently Asked Questions (FAQs)
Q: What is the weather forecast for the Chicago area this weekend?
A: The Chicago area is expected to experience heavy rainfall and flash flooding throughout the weekend, with periodic thunderstorms persisting through Saturday.
Q: What is the risk of severe weather on Saturday?
A: There is a marginal risk of severe weather on Saturday, with a few storms potentially reaching severe levels alongside flash flooding and damaging winds.
Q: How can I stay informed about weather updates?
A: You can stay informed about weather updates by following local news and weather reports, signing up for emergency alerts, and having multiple ways to receive weather warnings, especially if you live in a flood-prone area.
Q: What precautions can I take to ensure my safety during the storms?
A: You can take precautions such as staying indoors during heavy rainfall, avoiding traveling during flash flooding, and having a plan in place in case of an emergency.
