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Texas tornado

This frame grab provided by KDFW-TV shows storm damage Tuesday, March 3, 2012, in Arlington, Texas. Several reported tornadoes tore through the Dallas area on Tuesday, tossing semis in the air and leaving crumpled tractor trailers strewn along highways and in truck stop parking lots. (AP Photo/KDFW-TV) MANDATORY CREDIT

Tornadoes tear through Texas

The National Weather Service is investigating the damage caused by the tornadoes, which appeared to flatten some homes and graze others next door. The twisters jumped from place to place, passing many heavily populated areas overhead and perhaps limiting what could have been a more damaging, deadly storm. Most of Dallas was spared the full wrath of the storms.