In article ,
"Peter R." wrote:

On 6/3/2007 8:38:58 PM, john smith wrote:

Have you ever wondered what all those pretty colors on the various radar
maps you see mean and compare to the different sources?
See the link below.

http://www.davegwinn.com/Radar%20Chart.html

Dave writes a column in IFR that explains how things work.

Yep, good article. The only item I would have appreciated seeing on the chart
would have been the actual precip return strength in DBZ and perhaps that new
ATC precip classification (light, moderate, heavy, etc). But this chart is an
excellent starting point.

Peter, send him an email and ask him to update the chart.
See what he says.