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| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | | | |  |  | | | | |  |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 71°FLo: 22°C |
| POP: 30% | POP: 20% | POP: 40% | POP: 50% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 156 PM CDT Thu Sep 03 2026 
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Issued: 307 PM CDT Thu Sep 3 2026
Key Messages
- Another hot and humid day is in store Friday with peak heat index values of 100 to 105F, warmest south of I-80.
- Torrential rain-producing storms with a threat for flash flooding may impact far northern Illinois late tonight into early Friday morning, though confidence is higher that they remain in Wisconsin.
- There is another chance for showers and thunderstorms Friday evening.
- A break in the pattern will arrive by Sunday with lowering humidity values and temperatures.
Discussion
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