A severe weather outbreak continues this week for a huge portion of the East. Here's when you might need to change your plans.

Severe weather is expected to sweep across the U.S. in the coming days, with possible flash floods, tornadoes, hail, strong winds, wildfires and snow.

A tornado is defined as a "narrow, violently rotating column of air that extends from a thunderstorm to the ground," according to NOAA.

The National Weather service released its damage survey Friday evening confirming tornadoes Thursday night in Clay and Gentry counties in Missouri.

Another round of dangerous storms tore through the Plains Sunday afternoon and evening, the latest in a multi-day siege of deadly severe weather. Below, you can find our live updates from Sunday night,

The National Weather Service Monday confirmed two more tornadoes from Friday's outbreak of severe storms, bringing the total confirmed tornadoes in the greater Chicago area to nine.

The National Weather Service (NWS) of Sioux Falls surveyed the tornado’s path and found damage equivalent to an EF-0 tornado with estimated winds up to 80 mph.

Comments from the National Weather Service on their local storm report indicate that two tornadoes touched down in the Central Valley on Tuesday afternoon. According to NWS, around 2:15 p.m. on Tuesday,

Two tornadoes were confirmed in Missouri, with peak winds at 110 mph

The National Weather Service confirmed an EF-1 tornado in northwest Joplin early Friday morning.

The National Weather Service issued a severe weather outlook for parts of Ohio, warning of isolated strong winds and power outages.