There are several different kinds of tornado alerts you could receive when severe weather is in your area. But what exactly do they all mean?
The National Weather Service is expecting an outbreak of severe storms in the Tri-State on Friday. The Storm Prediction Center has placed the region in a "moderate risk" zone - the second-highest level on the five-step scale the agency uses to warn the public about threats for severe weather.
Here's what forecasters are saying about the outlook, timing, types of severe weather and more.
When is severe weather possible in Evansville and Henderson?
Scattered severe storms may start to develop as early as 1 p.m. to 3 p.m., but the weather service in a Friday morning post said the most likely time for severe weather in Evansville and Henderson is between 4 p.m. and 7 p.m.
What kinds of severe weather are possible?
Storms that are scattered in nature Friday afternoon - think "supercell" storms - would pose a higher risk for strong tornadoes and baseball-size hail.
Once the storms converge into a single line, the risk grows for hurricane-force damaging winds, as well as tornadoes.
Will there be updates throughout Friday?
The Storm Prediction Center will post an updated forecast around 11:30 a.m. Central time, and the National Weather Service office in Paducah, Kentucky, which handles forecasts for the Tri-State, is hosting a conference call around 11 a.m. Central time.