A recent tornado in South Dakota was given the relatively rare designation of EF-U due to the area in which it touched down.

The U stands for “unknown.” The tornado touched down Monday afternoon five miles east of Castlewood, southeast of Watertown. It touched down in an open field, and was on the ground for only a minute.

Only two first-place votes went to someone other than the Tornadoes in Class B this entire ... Viborg-Hurley (17), 18-2, 93; 2. Castlewood (2), 18-2, 78; 3. Dell Rapids St. Mary, 18-1, 57; 4.

Large tornadoes are carving paths of destruction across the South for the second day in a row as a deadly storm system churns across the United States. EF-4 or EF-5 tornadoes, the most violent on ...

The death toll from a sprawling outbreak of severe weather rose throughout the day Saturday as severe storms and reported tornadoes plagued the South. Nightfall Saturday will bring new dangers ...

Parts of more than a dozen states are threatened by tornadoes on Saturday as severe storms continue to head eastward, forecasters warn. The outbreak is forecasted across the central Gulf Coast ...

Here's the latest: The National Weather Service performed tornado damage surveys following the weekend's tornadoes in Arkansas and determined that two twisters received a violent preliminary EF4 ...

A severe weather system spawned intense, long-duration tornadoes that struck parts of Alabama, Arkansas, Mississippi and Missouri, leaving some communities in tatters. By Adeel Hassan and Hank ...

A tornado was spotted in Rolla amid severe weather and thunderstorm warnings across Missouri on Friday. According to AZ Intel, the Rolla Fire Department has confirmed the tornado and reports of ...

A severe storm making its way across the U.S. this weekend spawned tornadoes in Missouri and resulted in more than a dozen deaths – and continues to threaten the South and East U.S. this weekend.