I've found this website called "Atlanta Models & Talent Inc." and among one of the personalities includes Dan Chandler himself.
http://amtagency.com/display/dan-chandler-narration-vo/It does seem like he spent most of his voice-over work in Atlanta. He also once did voice-overs for the History Channel as well as a few local and regional Georgia-based companies.
I've also always wondered when he left TWC. Back during the revised-era of "No Place on Earth Has Better Weather" (circa April 1996-March 1998), TWC seemed to use Dan Chandler less often compared to how he was back in the '80s and all the way through the late "Weather You Can Always Turn To" era. During the late '90s, he continued to be featured in the "Weathering the Seasons" filler segments. I wounded if he retired from doing voice-overs?