Based on the Storm Relative Velocity product and the location of the radar (star

Question

Based on the Storm Relative Velocity product and the location of the radar (star), which of the following is true about the circled area?

A) The winds in the storm are circulating anti-cyclonically

B) The winds in the storm are circulating cyclonically

C) This storm is producing large hail

D) The height of the storm is 55,000ft

A) The winds in the storm are circulating anti-cyclonically

B) The winds in the storm are circulating cyclonically

C) This storm is producing large hail

D) The height of the storm is 55,000ft

Explanation / Answer

Storm relative velocity is a base velocity with the average storm motion being subtracted out. When storms are moving quickly, this makes it easier to spot the green/red velocity couplets that are indicative of rotation and which might be masked out by the motion of the storm. As with base velocity, the green areas indicates the wind motion towards the radar while the red indicates motion away from the Radar. This is a RADAR Velocity image. Now lets figure out how it works. When the Radar signal returns to the radar, the radar can detect shifts in the frequency of the waves returning back. The Radar detects the change in the frequency as the direction in which the wind is blowing that is either towards or away from the Radar. Here in the image given, in the circled area, the winds in the red patches are moving away from the Radar while the green moves towards the radar indicating a cyclonic movement with a low pressure in between and counterclockwise movement. So, the correct option is (B).

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