Extreme Meteorologist Reed Timmer has been chasing tornadoes for decades - witnessing firsthand some of the most dangerous twisters in recent memory. Since capturing his first footage of a tornado in October 1998, the 43-year-old Timmer has been at the forefront of numerous tornado encounters - over 600 during his 25-year chasing career. For AccuWeather's Tornado Week, Timmer recounted his five most memorable tornado chases. Timmer was a freshman at the University of Oklahoma in the spring of 19