By Brian Stelter, CNN

The ongoing blackout of the Weather Channel in DirecTV homes - affecting fully a sixth of all American households - exposes a challenge for television channels that carry weather, news and other types of information that are increasingly accessible on the Internet.

The channels have to ensure that they're providing something the Internet can't - and that may be getting harder and harder to do.

"News, weather and financial information are so widely available online, it's very cannibalistic to these genres," said Derek Baine, a senior analyst for SNL Kagan.

The television blackout, after all, doesn't extend to what is arguably the Weather Channel's most important asset, Weather.com. DirecTV customers still have access to the Web site, "which may be cannibalizing the core channel anyways," Baine said.

Read more of Brian's article here.