On Thursday there was a chance of severe thunderstorms in NE Colorado so I took advantage of a close storm chase this early in the year. My target was Holyoke, CO but as I left Sterling the fog quickly became very thick and I was driving directly into a severe warned cell, I checked current conditions further east and everything was fog, fog and more fog. I was becoming a bit frustrated and headed back West to see what looked like a timid cell on the radar, as I got through Sterling I saw the storm which didn't look like much at the time, so I stopped and waited to see what may develop. Within a matter of minutes the storm turned into this monster cloud that was rotating horizontally and moving extremely fast; I was trying to keep in front of it going 70mph and was not making any ground on it, talk about exhilarating! This is a 180 degree pano to give you some sort of scale, it took up the entire western sky from north to south.