Two former members of the Jayhawks have collaborated on a new album for the first time since 1995. Gary Louris and Mark Olson completed Ready for the Flood last year and expect to release it this summer or fall. The duo hired Black Crowes singer Chris Robinson as producer. No distribution plans have been announced. Olson initially left the pioneering alt-country band following the tour for 1995′s Tomorrow the Green Grass album, and the band called it quits in 2005. However, Louris and Olson have toured together over the last few years. Louris released Vagabonds, a solo album also produced by Robinson, on Feb. 19.