to get covered and out of the way. >> captain david tysher is out in the city when the sudden appearance of a tornado takes us by surprise. >> we did have a little bit of a warning, but not a whole lot. >> when the storm first hits officers are told to return to the station. >> this is normally a rallying device incase communications go down. >> but the heavy rain makes returning to the station much more difficult. >> we could see the funnel cloud lowering, and we saw the power flashes, and then 30 seconds later the rain just kind of wrapped in around it and it was just like somebody just pulled the curtains and set them down. >> those are the ones that can be especially dangerous. because a lot of folks are in the rain. they're thinking maybe they're not going to be hit by the tornado, and then here it comes in the rain. >> sergeant robert scott is one of the officers caught in the storm. in this video captured on his dashboard camera sergeant scott is making his way back to the station as the weather gets progressively worse. >> his thought process was to go to the police department here because he felt like he was getting away from the storm. >> turns out when the tornado actually developed and touched down, a bunch of momentum of wind came around the south side of it. >> circulation might be trying to reform here on the upper side of norman. >> as it did that it pulled the tornado about a mile to this the north. turns out it went right through downtown norman. >> sergeant scott doesn't realize it, but he's driving