Volatile spring weather will kick into high gear this week as a potential severe thunderstorm outbreak and life-threatening flooding loom large for tens of millions of people in the central and eastern United States.

Chicago will see temperatures in the 40s today with a chance for rain this afternoon and evening. Severe weather is possible tonight, with threats of hail, damaging wind, and lightning, followed by an enhanced risk for tornadoes and storms tomorrow.

The primary threats with this system will be destructive winds and potentially rapid rainfall; an isolated tornado, though, isn’t out of the question. Here’s the latest forecast breakdown for tonight’s storms A line of strong to severe storms is headed to the tri-state are Monday night.

LOUISVILLE, Ky. — Severe thunderstorms are expected to impact Kentucky, including Louisville, starting Wednesday night. These storms are likely to bring heavy rain, strong winds, and frequent lightning. Some of the storms will be severe, with the possibility of damaging winds, hail, and brief tornadoes are expected.

Between 10 PM and midnight strong-severe storms will move in from the west. Likely hazards include large hail, damaging winds and heavy rain. There is a low tornado risk. Wednesday: Storms will end early. The rest of the day will be breezy and mild. High 70, wind WSW 20 g30 mph

Indianapolis and Central Indiana could be in for severe weather Sunday afternoon, with thunderstorms, hail and damaging winds possible.

While most in West Michigan experienced strong winds, heavy rain, and frequent lightning Sunday afternoon and evening, some reported sights of Tornadoes!

Severe storms are set to hit the tri-state area Monday. Damaging wind gusts, large hail, isolated flooding and even an isolated tornado are possible.

If you’re not sure what to do in these conditions, that's understandable: This type of weather is very rare here.

We are tracking a line of severe storms that will bring the chances of tornadoes, high winds and hail during the Monday morning commute.

At least two rounds of strong-to-severe storms could pummel the Chicago area this week, the NBC 5 Storm Team said, threatening the region with heavy downpours, damaging winds, hail and even the chance for tornadoes.