Michigan residents should prepare for a potentially stormy Saturday with a high risk of severe thunderstorms and heavy rainfall across multiple regions of the state.

A line of heavy thunderstorms swept across the D.C. region Wednesday evening, unleashing torrential rains that flooded streets and violent wind gusts that toppled trees. The storms produced spectacular skies — including menacing clouds on approach and vivid rainbows upon exiting.

A tornado siren blared in Iowa this afternoon as a funnel cloud could be seen in the backdrop of the famed speedway outside Des Moines. NBC News’ Maggie Vespa reports on the severe weather threats facing millions in the Midwest tonight.

The primary reason for the slight decrease is because of stronger levels of wind shear expected in the Caribbean, according to the report. Wind shear, which is a change in wind speed or direction,

A hazardous weather alert is in effect for Northeast Ohio, including the Cleveland and Akron areas, as strong to severe thunderstorms and heat move through the region. The National Weather Service warns of damaging winds,

Severe thunderstorms will head east by Saturday, impacting eastern Michigan and parts of northern Indiana. Rain from 1 to 2 inches is possible as the system tracks east, but some areas could see isolated amounts of 3 to 5 inches through the weekend.

Millions of Americans across several states are facing the risk of severe storms on Thursday, according to forecasters. Meteorologists say the potential hazards posed by the storms include heavy rain,