Learning Center Library Contents

Down Arrow
Welcome Guest
Aviation Learning Center Document Weather Radar Echo Terms
Author: Christine Soucy and Michael Lenz Date: March 2006
used for alignment
used for alignment
Viewing Options: View Document as Chapters Chaptersused for alignment View Full Document Full Documentused for alignment View Print-Friendly Document Printer Friendlyused for alignment Search Inside this Document Search Insideused for alignment View PDF Version of Document PDFused for alignment

< Previous Chapter used for alignment Next Chapter > used for alignment

Important Things to Know
used for alignment

In the world of ATC, weather radar echoes are all referred to as "precipitation" even though, technically, it is possible the echo could be associated with birds, volcanic ash, etc., or precipitation that is not reaching the Earth's surface (virga). Controllers will tell pilots the location of significant areas of "precipitation" when it appears that it may affect the aircraft's flight path. They will also provide assistance in the form of course deviations when requested by the pilot.

Rainfall rates (i.e., inches/hour) as they relate to intensity (dBZ) have not been correlated with the ATC displays. Therefore, the terms (light/moderate/heavy/extreme) cannot be equated/correlated to rates of rainfall per se at this time. Generally, however, the more intense the echo, the more likely there is to be greater intensities of precipitation; and when conditions are favorable for convective activity, turbulence and other weather hazards should be expected. As the intensity of precipitation increases, so too, does the likelihood of more severe weather conditions. Pilots should also remember that turbulence can be present in areas where ATC does not display precipitation at all. Therefore, pilots should always exercise care when transiting areas of known or suspected convective activity.

used for alignment