Nexrad typically takes ~6 minutes per scan when wx in area...10 min in
clear air mode. The time stamp is from the start of the scan...so 2
six minute scans, plus a few minutes network delay =17 is quite
possible...not that it's good.

Over the public internet, I usually see NEXRAD data within 10 minutes
of the scan start time....but sometimes 20 mins if the net is
slow/busy. If you can time lapse the data, it gives you a good idea
where it's going anyway...and if it's THAT close you are a braver
pilot man than I am.


--Don Byrer
Former NEXRAD techie





Don Byrer KJ5KB
Radar Tech & Smilin' Commercial Pilot Guy
Glider & CFI wannabe
kj5kb-at-hotmail.com

"I have slipped the surly bonds of earth; now if I can just land without bending the gear..."
"Watch out for those doves...smack-smack-smack-smack..."