Bob Gardner wrote:

Honestly don't know whether it was Center or terminal, but I suspect that it
was Center. The whole discussion was about delays. In precipitation mode,
the image is updated every 4 to 6 minutes. This link gives the NWS
explanation of NEXRAD.
http://weather.noaa.gov/radar/radinfo/radinfo.html. The WARP (Weather and
Radar Processor) system, which is the weather display at Center consoles,
suggests further delays as the radar information is processed (duh). I have
been beating the drums, writing letters to the editor, etc, to try to
eliminate the phrase "real-time weather" from articles and advertisements.
NO ONE gets real-time weather, not even the folks at the NWS radar sites.

Only airborne weather radar provides real-time echos.