(1) Weather Coal hearts air conditioning. "I would think a normal summer weather pattern would help clearly" Arch Coal's John Eaves said. PRB producer Cloud Peak Energy (CLD) executives echoed the same on their first quarter conference call. Both companies emphasized that they don't need divine intervention, both used the phrase "normal summer weather." It's hard to blame executives for subtly reminding us just how uncooperative weather has been lately, this past Winter was the 4th warmest on record. (2) Natural Gas Price A glut of natural gas has priced as much PRB coal out of the market as possible, every power plant that could switch did. Without the price of natural gas increasing the PRB cannot reclaim its old market share for the summer. (3) Diesel Price The PRB is just plain not near the people. If the cost of diesel is around 3 times the cost of the coal it carries and the price of diesel doubles ... or gets cut in half ... yes, indeed that is a major league concern for the producers.