INTENSE ROTATION
Areas of particularly strong rotation are indicated by either a blueish-purple swirl icon or a purple arrowhead
as indicated by the legend on the left-hand side. The blueish-purple swirl icon means that intense rotation is
detected, but it is located in the upper-level parts of the storm rather than near the bottom. Thus, it is not
likely that this intense rotation has made it to the ground.
The purple arrowhead means that intense rotation is detected in the lowest levels of the storm, and therefore
has a higher probability that it is actually extending down to the ground. It needs to be pointed out that
dueto the curvature of the earth, it is not possible for any radar, no matter how powerful, to see what is
going on directly at ground level. However, when a purple arrowhead is displayed on SkyTracker7 HD Radar - and
especially if it is preceded by and/or coincident with a long lived rotation center as indicated by a gray or
blueish-purple swirl icon, the probability of a tornado increases.
|
RADAR BUTTON
