CNN anchor Bill Weir lashed out at an arm of Fox News on Wednesday after it posted a tweet mocking Al Gore’s efforts to combat global warming, calling the writers “willfully ignorant f**ksticks.”

The blog Fox Nation tweeted out an article on Wednesday night with the headline “Climate Doesn’t Cooperate With Al Gore’s Group’s Visit to Denver EPA Hearings.” The article, which was aggregated from The Washington Times, detailed Climate Reality Project’s recent trip to Denver.

The climate group, which was founded by former Vice President Al Gore, recently launched an “I’m Too Hot” campaign and was seen passing out free ice cream at the Environmental Protection Agency’s hearings in Denver this week, according to the article.

“The plan was to tout the EPA’s emissions proposal as a solution for hot weather brought on by global warming, but when the hearings began at 9 a.m. Wednesday in Denver, the temperature was a chilly 58 degrees. Plus, it was raining,” Washington Times’ staff writer Valerie Richardson wrote.

Apparently bothered by the Fox Nation tweet, Weir responded minutes later, tweeting “weather is not climate, you willfully ignorant f**ksticks.”

Weather is not climate, you willfully ignorant fucksticks. MT @foxnation: Climate Doesn’t Cooperate With Al Gore

http://t.co/QKe0PkyYQK — Bill Weir (@BillWeirCNN) July 31, 2014

Here was the original Fox Nation tweet:

Climate Doesn’t Cooperate With Al Gore’s Group’s Visit to Denver EPA Hearings

http://t.co/0VAYmvsZ1f — Fox Nation (@foxnation) July 31, 2014

On Thursday afternoon, Weir apologized on Twitter for his “dumb move.”

The glop of Midwestern guilt stuck in my chest prob won't go away until I apologize to @foxnation for name-calling. Dumb move. My bad. — Bill Weir (@BillWeirCNN) July 31, 2014

This post has been updated.

h/t Mediaite