Cold, clear nights are best. A rule of thumb for temperature is a decrease of 4 degrees F for every 1000 feet of elevation gain. If Logan's overnight temperatures are 40 degrees, the temperatures reached freezing around 6500 feet. However, if it was cloudy overnight, the snow is likely to be softer, because less radiation has escaped. Cloudy morning skies will slow or prevent the snow from softening.
Strong sunlight melts the snow-first it softens, then turns to slush.
High air temperatures enhance the effects of the solar radiation, and the melt is faster. Race the sun-begin on easterly aspects, work south and then move to western aspects. Keep in mind that high afternoon temperatures will often soften the western aspects more rapidly than other slopes. There are several indicators of decreasing stability. Several inches of soft, slushy surface snow is the best clue.