Radar Controller Knowledge Test 2 (CKT2) Practice Test

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Radar depiction of a thunderstorm shows precipitation area that is typically how in relation to the actual cumulonimbus cloud?

Larger than the cloud Equal in size to the cloud Smaller than the cloud Unrelated to the cloud

Correct Answer:

Smaller than the cloud

Explanation:

Radar shows where precipitation is occurring, not the entire cloud structure. A cumulonimbus cloud can extend well beyond the parts of the storm that are producing rain, hail, or snow at a given moment. Only the regions with enough hydrometeors to reflect the radar signal appear on the depiction, so the precipitation footprint is typically smaller than the full cloud. You may also have non-precipitating portions or virga above or around the radar echo. So the precipitation area shown on radar is usually smaller than the actual cloud.

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