Weather Radar Fundamentals

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Overview of Weather Radars » Questions » Question 4

Which of these images shows composite reflectivity? Note: The images are from the same radar, date, and time. (Choose the best answer.)

The radar reflectivity image in the left panel shows light to moderate precipitation over much of the radar range. The image on the right shows precipitation covering the same regions as that in the left panel, but also extending into areas where no precipitation existed in the left panel image.

The correct answer is b.

Image 2 shows composite reflectivity. Composite reflectivity shows the maximum dBZ in a given vertical column for all columns in the radar's range. This means that precipitation will appear more intense in some areas and will extend over a greater area than what is shown on base reflectivity. However, it may not correspond as well to what is happening on the ground.

Please make a selection.