[Bug-wget] Get Newest File Only?

[Robert P Dale]

I'm doing a check of

http://motherlode.ucar.edu/cgi-bin/ldm/genweb?native/radar/level3/N0R/GRR/20
090212

every 5 minutes to grab the newest file only, with filenames that always
change (i.e. timestamps are never the same day to day or even hour to hour.)
If I do wget -r -N it does the job, but it seems to take a lengthy process
to check each and every file. Is there a way to tell it to just compare
what's newest on the server and compare to my local side?

 - Rob