Thunderstorm Periods Overnight, Heat Index High 100°F Thursday, and Intermittent Storms Through 12AM Saturday/Sunday



O’HARE: 79°F LAKEFRONT: 75°F Wednesday 7/19/2017 9:40 PM

Thunderstorms have diminished as they move across northern Illinois, but have brought some power lines down, some heavy rain and lightning and thunder. A bow echo on radar, indicative of high winds, also weakened as it approached northeast Illinois. The heaviest rain appears to be south of I-88, but about 0.25 inch rain is expected by the time this storm passes. The NWS issued some Severe Thunderstorm Warnings, but they were expired early.

Intermittent thunderstorms are now possible from tonight to about midnight Saturday/Sunday.

TONIGHT: Showers and thunderstorms, mainly before midnight. Some storms could be severe, with large hail and damaging winds. Low around 72. East wind around 5 mph becoming south after midnight. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

THURSDAY: Showers and thunderstorms likely, mainly before noon. Partly sunny, with a high near 91. Heat index values as high as 100. South southwest wind 10 to 15 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.

High XX, Arlington Heights, Chicago Weather Forecast Northwest

Arlington Heights weather forecast, Chicago weather forecast

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