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The first bout of true late fall-like temperatures this season move into the Chicago area starting Thursday, with a 20-degree temperature drop and the chance for frost or freeze by this weekend. The forecast comes after multiple days of 70-degree temperatures, and one of the Chicago-area s warmest Octobers on record. Early Thursday morning, temperatures were already in the 40s, NBC 5 Storm Team meteorologist Iisha Scott said. Temperatures will rise into the 50s, but wind gusts up to 30 mph throughout the day could make things feel even chillier. When temperatures start cooling down, you factor in that wind, it s going to start feeling cooler, Scott said. Scattered showers were also possible Thursday afternoon and evening, Scott said, though not everyone would see it. Overnight, lake effect rain showers will develop in northwest Indiana. Friday will be a colder day, Scott said, with highs in the upper 40s, but lows in the upper 30s. It s going to get even co