A windy and warmer day kicks off Friday in Chicago, but a severe storm threat is expected to develop after dark, bringing with it the possibility for damaging winds.

Following storms sweeping through overnight Friday into early Saturday morning, temperatures are expected to still be mild.

The fast-moving line of storms was capable of producing destructive winds over 70 miles per hour and potential tornadoes, and was expected to clear the Chicago area and Northwest

What started as a summer-like day Friday will end with potentially severe storms as a powerful system prepares to sweep across the region, but there's a narrow window of time you'll want to make sure you're prepared for.