There is cutting edge research going on right now that will allow us to better predict high winds, flash flooding, tornadoes, and lightning. Video

"VORTEX2," the world's biggest tornado research project begins this week as scientists will chase storms across Tornado Alley.

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Sometimes a tornado's damage path appears irregular, leaving some buildings demolished but others in the same path relatively undamaged.

Does size matter in a tornado? In other words, do the biggest tornadoes produce the strongest winds and thus the most damage?

Scientists have developed a scale that allows an estimate of a tornado's wind speed by examining the damage left behind.