<p>A large rotating cloud formed over Gruver, Texas, during a tornado-warned storm on Monday, May 28.</p><p>This video of the cloud was captured by eyewitness Andrew Brockman. A tornado warning siren can be heard during the clip.</p><p>The National Weather Service</a> had a tornado warning in place for the area until 9.15pm local time. Credit: Andrew Brockman via Storyful</p><br />
