NOVA
Hunt for the Supertwister
Wednesday, May 22, 9:00 pm ET
and Saturday, May 25, 8:00 pm ET

A powerful tornado is a terrifying phenomenon that continues to defy decades of scientific efforts to predict it. During one of the worst tornado seasons on record, a NOVA camera team chased across the Midwest, capturing hair-raising footage of highly destructive twisters in action. But this is much more than just another “extreme weather” show, focusing on the efforts of two scientists at the University of Oklahoma to develop radically different approaches to forecasting twisters. With jaw-dropping 3-D graphics generated by the National Center for Supercomputing Applications, “Hunt for the Supertwister” features spectacular footage of terrifying twisters and gives viewers a front-row seat to the risky and thrilling art of storm chasing.

National Memorial Day Concert 2013
Sunday, May 26, 9:30 pm ET

“One of the holiday’s best TV traditions.”- USA Today On the eve of Memorial Day, join co-hosts Joe Mantegna (“Criminal Minds”) and Gary Sinise (“CSI: New York”) for a night of remembrance featuring an all-star line-up performing with the National Symphony Orchestra. The 24th annual broadcast of the NATIONAL MEMORIAL DAY CONCERT airs live from the West Lawn of the U.S. Capitol before a concert audience of hundreds of thousands, millions more at home, and to our troops around the world on the American Forces Network.

Antiques Roadshow
Seattle (Hour Three)
Monday, May 27, 8:00 am ET

ANTIQUES ROADSHOW host Mark L. Walberg discusses Northwest Coast Indian masks with appraiser Ted Trotta at the Burke Museum of Natural History and Culture. Seattle becomes the city that sparkles with the discovery of a late-16th-century diamond and enamel jewel. Other notable finds include a moose, elk and buffalo hide chair; an 1880s Crazy Quilt; and a white Steiff clown bear worth $2,500-$3,200.