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| June 11th Radar Imagery and Storm Movement |
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| This image shows the derecho moving swiftly across southeast Wisconsin. Find the black circle with a one in it. This indicates the location of a tornado that was already on the ground for 17 minutes and would last for another five minutes or for a total of 22 minutes. This tornado was only an F1 on the fujita scale, but any tornado is dangerous. The main indication of the tornado was a TVS or a tornadic vortex signature. These are marked by little, upside down, red triangles, which are hard to see when the image is not at full size. |
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| This radar image is from 9:59pm. This shows many different things all going on at once. Find the number two in a black circle. This indicates an area of high winds with gusts up to 90mph. The number three in a black circle indicates a large area of rotation similar to a low, called a bookend vortex. The fours in black circles indicate rear inflow notches which also indicate an area of higher winds but toward the front of the storm. They can also be found closer to the area of red reflectivity whenthere is an indentation in the red area by an orange or yellow color. There is also weakening on the western end of the storm but the east and north ends continue to hold together. |