This is the ominous moment a tornado threatens to form amongst baleful clouds above a residential area just outside Chicago in Illinois, USA. <br /><br />The USA's national weather service had issued a tornado warning for various counties in Illinois including Dekalb, La Salle and Kendall. <br /><br />The apocalyptic dark clouds gathered together as a quick-wind whipped up violently shaking nearby trees and bushes in this Chicago suburb.<br /><br />At one point the clouds start forming a point which look to be the beginning of a tornado funnel. The filmer exclaims "Oh no, please don't!" just as she rushes back inside with her dog. <br /><br />The filmer also comments on how cold the the air has become around her stating "It's getting really, really cold!"<br /><br />In a matter of seconds the filmer then exclaims "Now it's getting like ice cold!"<br /><br />Anxious to get back inside the filmer calls her dog to come back to her but it is clear this pup is confused by the strange weather.<br /><br />Footage shows trees rocked by strong winds and leaves whip past the filmer after they have been stripped from their branches. <br /><br />The grass beneath the filmers feet ripple's in the fast wind and the sound of roaring air rushes past the camera's microphone as the dark clouds gather overhead. <br /><br />The filmer quickly ducks back into her home with her dog before the imminent deluge.
