Slow-moving tornadoes may creep at less than 5 mph, sometimes remaining nearly stationary. However, the question of how fast can a tornado move requires a distinction between the rotational speed of the funnel itself and the forward speed of the entire storm system across the landscape.
Measuring Tornado Speed Radar: How Doppler Tracks Forward Motion and Rotational Velocity
The fastest forward speed ever recorded for a significant tornado was associated with the Tri-State Tornado of 1925, which is estimated to have moved at an astonishing 73 miles per hour on its 219-mile journey through Missouri, Illinois, and Indiana. There are two distinct measurements that define the motion of a tornado: the speed of the winds circulating within the funnel and the speed at which the parent storm track travels across the ground.
The Two Types of Tornado Speed To accurately address how fast a tornado can move, one must first separate the dynamics of the vortex from the dynamics of the storm. Forward Motion Rotational velocity refers to the speed at which air is spinning around the center of the vortex.
Measuring Tornado Speed Radar: Understanding Rotational and Forward Motion
In contrast, forward motion describes the velocity of the entire supercell thunderstorm carrying the tornado. This is the damage-causing wind speed measured on the Enhanced Fujita (EF) Scale, where estimates for the most intense tornadoes exceed 200 miles per hour.
More About How fast can a tornado move
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More perspective on How fast can a tornado move can make the topic easier to follow by connecting earlier points with a few simple takeaways.
