Trees, Shrubs and Conifers: Picea pungens wind throw, 3 by Pseudo

Pseudo wrote:
Over the years I've noticed this species seems very susceptible to wind throw, with trees in the 15'-20' range most vulnerable. Outward appearances would indicate they're healthy. While most of the trees I've seen down are highway plantings in the Twin Cities metro, these pics are from a commercial planting in Brainerd, MN. This is a group of four, with three laid down in a storm from last week. Only one at the opposite end from direction of wind stayed upright. I'm guessing they were B & B stock, but not certain of that. Does this species broad and dense growth habit increase the liklihood of wind throw, especially at this stage of development, or is it more of a root problem?