OKLAHOMA CITY (AP) — The Oklahoma National Guard has been activated to rescue motorists stranded in southwestern Oklahoma made nearly impassable by a powerful winter storm.

Oklahoma Turnpike Authority spokesman Jack Damrill says Oklahoma National Guard troops were asked Thursday to travel along the H.E. Bailey Turnpike to rescue motorists stranded by collisions or spinouts on the icy roadway.

Damrill says Oklahoma Highway Patrol troopers have been ordered off the turnpike because of the dangerous conditions. Damrill says heavy snow and strong winds have reduced visibility to zero.

From Oklahoma Highway Patrol at 3:10pm

TROOP A- All interstates in the Oklahoma City Metro area have been shut down due to weather. 12-24-09/1437 TROOP B- All of Troop B ( Tulsa, Rogers, Okmulgee, & Creek Counties, Including the Creek Turnpike) are under a blizzard warning. All Travel is extremely discouraged. All roadways are extremely slick and hazardous. 12/24/2009 1453