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Chicago faces another cool breeze before a warmer weekend

Cold air aloft Wednesday and afternoon heating that saw northeast Illinois temperatures warm into the middle and upper 60s (Rockford actually recorded a high of 70) created an unstable atmosphere and widely scattered light showers.

Colder Canadian-source high pressure followed into our area overnight, and gusty north to northeast winds (for the seventh straight day) will contribute to some cloudiness and cooler conditions Thursday. Highs will end up 10 to 15 degrees below Wednesday's peak readings.

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However warmth is on the way, with winds shifting more southerly later Friday and then strengthening Saturday and Sunday. Chicagoans will get their first weekend with back-to-back 70s in seven months. There's also an increasing chance of showers and thunderstorms.

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