Radiohead will embark on its first North American tour in two years May 5 in West Palm Beach, Fla. Eight shows have been confirmed for the first leg, which wraps May 18 in Dallas.

Afterward, Radiohead will visit Europe for a month's worth of shows that begin June 6-7 in Dublin and wrap July 8 in Berlin. The band then returns to North America in August for shows in such locales as New York, Chicago and Los Angeles, with dates and venues to be announced.

Tickets for the first leg dates go on sale Thursday (Feb. 14) for members of Radiohead's W.A.S.T.E. fan organization and two days later for the general public.

The group will be out in support of its 2007 album "In Rainbows," which was first made available as a name-your-own-price download via Radiohead.com in October, and then released on CD in early January via TBD/ATO. It has sold 311,000 copies in that form, according to Nielsen SoundScan.

Here are Radiohead's North American tour dates:

May 5: West Palm Beach, Fla. (Cruzan Amphitheatre)
May 6: Tampa, Fla. (Ford Amphitheatre)
May 8: Atlanta (Lakewood Amphitheatre)
May 9: Charlotte, N.C. (Verizon Wireless Amphitheatre)
May 11: Bristow, Va. (Nissan Pavilion)
May 14: Maryland Heights, Mo. (Verizon Wireless Amphitheatre)
May 17: Houston (Mitchell Pavilion)
May 18: Dallas (Superpages.com Center)

Here are the cities for the tour's second leg (dates, venues TBA):

Boston
Chicago
Cleveland
Indianapolis
Los Angeles
Montreal
New York
Philadelphia
San Diego
San Francisco
Santa Barbara, Calif.
Seattle
Toronto
Vancouver