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Chicago:Temps and humidities produce one of summer 2004’s muggier days. Highs 10(degrees) above Wednesday’s. More intervals of mixed sun than yesterday, fairly windy, quite humid. Scattered severe afternoon, evening t-storm clusters erupt. Peak heat indexes: 95-100(degrees) Cloudy spells, muggy, scattered t-storms Thursday night.
HIGH: 87
LOW: 72
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Tom Skilling is chief meteorologist at WGN-TV. His forecasts can be seen Monday through Friday on WGN-TV News at noon and 9 p.m.



