Rain Likely with Thundershowers, Lighting; Half Inch Rainfall Possible

Weather radar indicates rain and thundershowers with possible frequent lightning for Arlington Heights and the northwest suburbs this morning and today. The storms are expected to weaken as they approach Chicagoland. The northwest suburbs could get about a half an inch of rain today.

Flood watches and warnings exist for northwest Illinois.

TODAY
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind around 10 mph, with gusts as high as 15 mph.

Tonight
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 90. Heat index values as high as 95. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 74. South southwest wind around 10 mph, with gusts as high as 15 mph.

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