Both Leftover Salmon and The North Mississippi Allstars are in the midst of winter tours. On Thursday night, the groups intersected for a joint performance at Spokane, WA’s The Knitting Factory. Near the end of Leftover Salmon’s first set, North Mississippi Allstars guitarist Luther Dickinson emerged for “Railroad Blues,” “Gulf of Mexico” and “Unplug that Telephone.” The North Mississippi Allstars will perform at Lincoln, NE’s Bourbon Theatre tomorrow while Leftover Salmon will appear at Crystal Bay, NV’s Crystal Bay Club this evening.