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- ▸Branches bent or broken under snow or ice load
- ▸Whole-canopy collapse (especially conifers)
- ▸Trunk splits down the middle (codominant stems splitting under weight)
- ▸Top-out failures where weight overloads a weak trunk section
- ▸Branches encased in ice from freezing rain
Snow load works differently than wind load. Wind is dynamic and time-limited — gusts hit and pass. Snow and ice are static and accumulate, loading every branch with weight that doesn't dissipate until temperatures rise or the load breaks something. A heavy wet snow event can put thousands of pounds of load on a single mature tree.
The species most vulnerable in Spokane are evergreens with dense needle structures that catch snow — blue spruce, Norway spruce, white fir, and some pines. Their canopy structure is designed to shed snow in normal conditions but can be overwhelmed by heavy wet events. Deciduous trees are mostly safe in winter because they have no leaves to catch snow, but trees that hold onto dead leaves (some oaks) can suffer.
Ice storms are the worst-case scenario. Freezing rain coats every twig and branch in a layer of ice that can add 10x the branch's normal weight. The January 2021 event in Spokane Valley brought down hundreds of trees over a 24-hour period because ice loaded canopies that wind alone wouldn't have touched.
What you can do during a snow event: gently knock heavy snow off branches you can safely reach with a broom (use the soft side, push up from below — never beat the branches). Anything you can't reach safely, leave alone — the risk of branches snapping while you're underneath is real.
What you can do before snow season: crown cleaning to remove deadwood, structural pruning to reduce weak unions, and reduction of overweighted branches over structures. Done in fall, this work measurably reduces snow-event damage.
Spokane / North Idaho Context
Spokane's worst snow/ice event of the past decade was January 2021 — a multi-day freezing rain event that loaded canopies beyond their breaking point. We ran 24/7 emergency response for a week. Lesson learned: get high-risk evergreens over structures pruned in fall before the wet snow season starts.
What to do right now
- 1Schedule pre-winter pruning for high-risk evergreens by mid-October.
- 2Knock snow off reachable branches with a soft broom — never with a rake or sharp tool.
- 3Stay clear of the canopy drip line during ice events.
- 4After snow melts, inspect for hidden damage — split unions, hanging branches, leaners.
- 5Call (509) 204-4333 for post-storm assessment.
What it costs: Pre-winter pruning: $300–$1,500/tree. Post-snow-event response: $500–$5,000+ depending on damage scope.
Frequently Asked Questions
Should I shake snow off my evergreens?
Gently, with a broom pushing branches upward from below. Never shake the trunk hard or beat branches with a rake — frozen wood is brittle and you'll break what you're trying to save.
Why do conifers split down the middle in snow events?
Codominant trunks (two main stems with included bark) have no real wood holding them together — just bark sandwiched between two trees. Snow load pushes them apart and the union splits. Common in older Norway and blue spruce.
Will my insurance cover snow damage?
Usually yes if the snow damaged your home, garage, or fence. Coverage of the tree removal portion is standard for covered perils. Read your declarations.
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