There's a half-foot of new snow on the ground north of Genoa this morning, and it's still coming down. The rain forecast for Christmas Day never came, and it just started snowing in the afternoon and kept on all night long. There was 2 inches on the ground at 6 p.m. Tuesday and another 4 inches has fallen since then.Chain controls are the rule in the mountains, and even through Minden and Gardnerville starting at Johnson Lane and running south to Bridgeport. It's going to be a snowy commute north with controls starting in Washoe Valley and running north of …