Over decades have been tree skiing fresh snow in the Tahoe region including stormy days, well as long as winds are modest. There is more tree skiing at many of those resorts than even most experienced skiers realize. Advanced skiers in particular tend to be unfamiliar with lower gradient tree runs especially if such terrain is off green and blue lifts as they may rarely explore those areas. Many may also expect skiing lower gradient fresh snow is not as fun, especially if they are heavier and tend to ski powder fast with less turns. As a light turny skier with a relaxed bouncy powder style, I love the lower gradient areas too and often long after the obvious areas have been tracked out find shorter sections of untracked snow.
Generally tree skiing becomes more difficult with increasing tree density, increasing slope gradient, and snow water content. The lower gradient slopes are especially fun after a cold storm with low water content snow. In the Tahoe region, higher resort elevations tend to be more open alpine without trees while lower wind protected and avalanche free zones are more likely to have forest. Sierra timberline forests tend to be less dense than many Rockies areas without thinning while conversely the lower elevations mean one may not find such areas worth skiing depending on snow levels thus water content.
A key of mine to locating obscure fresh untracked areas in trees is studying ski resort trail maps, topographic maps, and satellite maps that can show slope gradient and tree density. The following example below is an online map of Dodge Ridge. Below it, a section of the right most area in Satellite mode that shows where trees are dense and where they are not. By studying the lift layout with a topo map, one can predict areas skiers and in this era snowboarders are less likely to venture into. Sometimes one will ski along a ski run cut through forest with dense trees at trail borders that discourage entry but find after traversing through the dense areas, relatively open lenses of less dense trees. The more difficult it is to reach a particular line in trees, the more likely it will be untracked. Thus topo map areas below rocky steep cliffs or areas guarded by awkward to traverse across ravines, or lines below flats where one may get trapped at, lines below small terrain bumps requiring some climbing, and especially trees off green runs.
The below is a more zoomed in view of Heavenly Olympic chair top terminal with Crossover Road near center right. It looks like skiers might quickly track out those well-spaced tree slopes but such is not the case if one looks at the topo map because one cannot otherwise see the terrain bumps that deflect skiers away and below the road people speeding along the road don't pay attention to what drops off to the side.