I understand it has always been buggy...but close enough for change-over scenarios
use the SPC winter tools from their meso page for more accuracy
https://www.spc.noaa.gov/exper/mesoanalysis/new/viewsector.php?sector=16&parm=pmsl&underlay=1&source=1#
cod met --radar tools rocks
loop it... watch the magic of tech
https://weather.cod.edu/satrad/nexrad/index.php?type=DIX-HHC-0-6