Final answer:
The pressure in the center of a tornado can be as much as 100mb lower than the air surrounding the tornado, resulting in violent winds. Tornadoes are created by the rotation of a column of air in severe thunderstorms, with the difference in wind speeds causing the air to spin around a vertical axis.
Step-by-step explanation:
Based on recent measurements, it is true that the pressure in the center of a tornado can be as much as 100mb lower than the air surrounding the tornado. This difference in pressure is an important criterion for generating storm reports. Tornadoes are violent rotating columns of air that descend from clouds in funnel-like shapes, producing winds as high as 500 km/h. The difference in wind speeds between the strong cold winds higher up in the atmosphere and weaker winds traveling north from the Gulf of Mexico causes the column of rotating air to spin around a vertical axis, creating a tornado.