The Owyhees upper mountains, namely the Silver City area and south including the Mud Flat byway, did get pounded with snow. They normally get quite a bit due to the high altitude and the natural weather break the Owyhee range produces. Last spring was still so wet, in fact, the Owyhee County Sheriff’s office closed nearly all the Owyhee Co non-paved roads in Idaho. This was a first and was a direct result of the snow melt and our wet spring. The closing was widely advertised, but the roads were re-opened abt 6-8 weeks later with little notice or fanfare.
The area near Rome/Jordan Valley also gets snow, but the snowpack rarely lasts or built as it does in the higher elevations of the range. Silver City is kept accessible, I am told, year round - but I have never made a winter trip.
Also the Selway is in the heart of the Idaho/Montana rocky mtns - and yes, the snowpack there was also relatively very high and slow to melt this last year, as was much of the Idaho central mountains.