Southwest monsoon helping nudge core of hot weather into the nation’s mid-section; Chicago area is headed for a string of five 90s Thursday through Monday amid surging humidities; storm chances to rise

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Temps to reach 50s Monday
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Snow, ice and cold: Winter rolls on
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A sweet warm up on Valentine’s Day – then back to cold
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Winds deliver arctic chill this weekend, snow possible Sunday
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Freezing rain, sleet on Tuesday
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Cold returns after warm Valentine’s Day
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Freezing drizzle Monday, cold temps throughout week
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Cold temps Friday, snow possible over weekend
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Freezing drizzle Wednesday night, snow possible as temperatures drop
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Snow Thursday evening; warm-up on the way
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Record cold Wednesday, weekend warmup on the way
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Cold, windy Sunday; snow moving east
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Brutal cycle of cold and snow begins