The severe weather threat comes after a stormy Friday morning, with heavy downpours and lightning strikes leading to ground stops at both O'Hare and Midway International Airports ...

Strong to severe thunderstorm chances were in the Chicago weekend weather forecast, the NBC 5 Storm Team said, with the potential for damaging wind, hail and even tornadoes. The severe weather threat, ...

Tornadoes form by an extreme spinning of air caused by a mixture of heat, humidity and changes in air. Here's how they all ...