@idefix37 this was in Richmond, Indiana USA (which is not Richmond, Virginia). The forecast was at 21:30 EDT on Tuesday, April 20, 2021.
I've had this issue before, though. A conjecture based on, oh, nothing: there was snow earlier in the forecast. Perhaps once the display starts showing cm for snow, it just keeps showing cm, even if later precipitation events are rain? I can't remember if I've seen the problem in reverse, with several cm of snow being reported as a few mm of rain.