<p>A severe thunderstorm warning brought a large amount of one-inch hail</a> to Greeley, Colorado, on Tuesday, June 19, while other areas of Colorado were also under a tornado watch.</p><p>This video shows a pile of hail accumulating outside a house in Greeley, Colorado. The National Weather Service issued</a> a severe thunderstorm warning for that area on June 19. <br />There was a confirmed tornado in Weld County, but there were no verified reports of significant damage</a> at the time of writing.</p><p>Twenty flights were cancelled at Denver International Airport due to the storms, according to local reports</a>. Credit: Andrea Suarez via Storyful</p><br />