Tempest has a band name that might suggest a group of sneering, leather-wearing, head-banging metal heads, but the group's music is less threatening and more expansive than its name suggests. Tempest plays traditional Celtic music with a rock & roll intensity that's accented by a wide range of influences from the blues to American country music, Cajun 2-steps, and Arabic music, with some old-time San Francisco psychedelic flair. It's a mix bandleader Lief Sorbye calls "Celtodelic". The band's music, live and on record, aims for a blend that's half-traditional and half-contempo...