Extreme Heat and Severe Thunderstorms Today

Extreme heat continues today from the central Plains to the lower Mississippi River Valley, over southeast Montana, and from southern California into the Southwest Deserts. Extreme Heat Warnings remain in effect. Severe thunderstorms capable of strong to severe wind gusts and large hail are possible across the Great Lakes into the Ohio Valley today into tonight. Read More >

Hazardous Weather Conditions

Last Update: 212 PM CDT Mon Jul 27 2026

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Chicago, IL Local Forecast Office

8NM ESE Chicago IL

Marine Zone Forecast

Late This Afternoon

Northeast winds 15 to 20 kt. Chance of showers and thunderstorms. Some thunderstorms may be severe with damaging winds and large hail. Waves 2 to 4 ft.

Tonight

Southwest winds 15 to 25 kt becoming north 20 to 25 kt late. Chance of showers and thunderstorms in the evening. Some thunderstorms may produce damaging winds and large hail in the evening. Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft.

Tuesday

North winds 20 to 25 kt increasing to 30 kt. Mostly cloudy in the morning then clearing. Waves 5 to 8 ft occasionally to 10 ft.

Tuesday Night

North winds 15 to 25 kt diminishing to 10 to 20 kt. Mostly clear. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft.

Wednesday

North winds 10 to 15 kt. Sunny. Waves 2 to 4 ft.