Hi Jeff,
I have been unable to get dates before the year 2000 to display in my labels using the LTM command. I know we have traveled down this road before but, unfortunately it seems we need to traverse this old road once again.
The data that I have been working with is NCEP/NCAR Reanalysis
http://nomad3.ncep.noaa.gov/cgi-bin/ftp2u_6p_r1.sh and
NCEP North American Regional Reanalysis
http://nomads.ncdc.noaa.gov/data.php#narr_datasets
Thank you,
Kevin