Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Hazardous Weather Conditions

Last Update: 305 AM CDT Mon Aug 31 2026

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For More Weather Information:

Chicago, IL Local Forecast Office

6NM SE Evanston IL

Marine Zone Forecast

Today
Southwest winds 10 to 20 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.
Tonight
Southwest winds 10 to 15 kt. Slight chance of showers and thunderstorms in the evening. Waves 1 to 2 ft.
Tuesday
Southwest winds around 10 kt. Slight chance of showers and thunderstorms in the morning. Waves around 1 ft.
Tuesday Night
Southwest winds around 10 kt. Slight chance of showers and thunderstorms in the evening. Waves around 1 ft.



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305 AM CDT Mon Aug 31 2026
 
 

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