I've got a semi-regularly updated plot of WWV and WWVH signal
metrics in suburban Washington DC on-line at

http://www.trailing-edge.com/~shoppa/wwv/

These are generated from the wwv5 metrics produced by NTP using
refclock_wwv and a Ten-Tec RX-320 computer-controlled receiver.
Antenna is a random wire in the attic.

The graphs are... busy! 10 lines, for WWV and WWVH on each of
2.5, 5, 10, 15, and 20MHz (actually there's no WWVH on 20MHz).

I do have archived data pre-June, I'll try to put it online sometime...
right now it's from mid-June onward.

I'm going to try to add more graphs showing refclock_wwv performance,
especially during signal re-acquisition and QSY'ing.

Tim.