https://www.wkbn.com/weather/does-bad-weather-skip-youngstown-radar-holes-and-their-local-effect/

It’s called a Radar Hole

“Snow was probably occurring over the radar at this time, but dry air between the clouds and the ground was causing the snow to evaporate before it hit the ground. Therefore, there was no snow showing up on radar.

This phenomenon is called “virga” and it is very common at the onset of wintry precipitation events.

Eventually, the atmosphere begins to saturate and the “radar hole” will close up as the precipitation gets closer to ground level.”