|Three tornadoes violently spinning in the Dallas-Forth Worth area are collapsing roofs, ripping down power lines and tossing trailers around like toys, authorities say.
Weather service advisories said storm spotters and radar showed separate 'large and extremely dangerous' tornadoes south of Dallas and Fort Worth.
The weather service says 'considerable damage' has been reported near Cleburne, south of Fort Worth, and Lancaster, south of Dallas. Local television footage shows overturned and smashed semi-trailers on the ground in the southern portion of Dallas County. Dallas Police spokeswoman Sherri Jeffrey says twisters also have caused damage in the city limits.