In his blog post supposedly showing that the recent Pacific Northwest heat wave had no relation to global warming, Cliff Mass displayed this chart of "Average number of days with temperatures above 99F in" Washington or Oregon and claims it has "no trend":
Yeah, right. Do you think maybe the rest of his post might suffer from such sloppy thinking? You have to wonder.
Gavin Schmidt caught Cliff on this on a comment on the RealClimate blog here. Tamino also gives it to Cliff here. After that Cliff gives up. Clearly there was some pretty sloppy thinking in his blog post.