The parting appears to be amicable.
"This is a once-in-a-lifetime opportunity for me to do what I love most at a network that lives and breathes the weather," Champion said.
Champion, who will become the Weather Channel's managing editor, will join his former a.m. rival Al Roker, the Today show host who also hosts Wake Up With Al on the Weather Channel.
His role will be taken over by weekend weather anchor Ginger Zee, who has filled in for him regularly over the past two years.
[New York Times]