The building maintenance scheduled for Friday February 27th at 5:00pm MST has been postponed until 5:00pm March 6th. PSD's website will be down during the maintenance.
Get climate division boundaries.
NCDC provides a link to their climate division shapefiles (zipped).
Please email them with questions.
NCAR has a netCDF file with the climate division boundaries
available entitled "climdiv_polygons.nc". NCL
has the boundaries builtin to its plotting code as does GrADS