Trees in the Pacific Northwest rarely fail because of extraordinary wind. They fail because ordinary wind arrives while the ground is saturated and the tree already had a defect nobody addressed.
That is genuinely good news, because it means most storm damage is predictable months ahead of time. Here is what to do about it while you still can.
How trees actually fail here
Understanding the mechanism tells you what to look for. Clark County trees come down three ways:
- Root failure, or windthrow. The whole tree tips, root plate and all. This happens when saturated soil loses its grip and wind provides leverage. It is the most common mode here and the most preventable through assessment, because the warning signs are usually visible.
- Trunk failure. The stem snaps, almost always at a point already weakened by decay, an old wound, or a bad union. This is what catches people out, since the canopy above the break often looked healthy.
- Branch failure. Individual limbs come down. Least dangerous to the tree, still fully capable of taking out a roof or a car.
Do a bare-canopy inspection
Wait until most leaves are down, then walk your property and look up deliberately. What you want to find:
- Dead limbs still held in the canopy. These are first to go and they land without any regard for what is beneath.
- Codominant stems with included bark. Where two trunks of similar size meet in a tight V, look for bark pinched inside the union rather than a raised ridge. Those unions split, and they split in wind.
- Cracks or seams in the trunk. A vertical crack is a structural warning, not cosmetic.
- Cavities, old wounds, conks, or mushrooms. Signs decay may be present inside.
- New lean, especially with soil cracked or lifted on the side opposite the lean. That is a root plate beginning to move, and it is urgent.
Check what is above the roof
Any limb resting on, rubbing, or overhanging your roof is worth handling before the storms. Wind moves those limbs, and a limb that merely touches shingles in calm weather can strip them when the tree starts flexing.
Same for limbs over the driveway, the deck, and anywhere people walk.
Handle the real problems now, not in December
If your inspection turns up a lean with disturbed soil, a split union on a large stem, or decay on a tree within reach of the house, get it assessed now. A hazard tree assessment tells you which trees genuinely need work and which are fine, so you can spend money on the right ones.
There is also a practical scheduling reason to move early. When the first major system hits, every tree company in Clark County shifts to emergency response, and planned work gets pushed. Work booked in September happens in September.
Do not top your trees to make them safer
This comes up every fall and it is worth being blunt about: cutting the top out of a tree does not reduce its risk, it increases it. Topping removes the foliage the tree needs, triggers a flush of weakly attached new shoots, and opens large wounds that invite the decay you were trying to avoid. Within a few years a topped tree is taller, denser, and structurally worse than before.
The legitimate version of this is crown reduction or thinning, done by someone who knows where to cut. Where a tree is worth saving but structurally marginal, cabling or bracing can be an option.
Before the first storm
- Know where your trees would land if they failed, and move what you can
- Secure furniture and anything that becomes a projectile
- Note the location of overhead utility lines on your property
- Have a tree service number saved before you need it at 11pm
And when a storm does hit, stay away from downed trees until they have been looked at. A fallen tree is often still holding enormous stored tension, and downed limbs can be in contact with energized lines. Assume any downed line is live and call the utility.
Cascade Tree Works serves Vancouver, Battle Ground, Camas, Brush Prairie, La Center, Washougal, Ridgefield, and Hockinson. Our ISA Certified Arborists can look at your tree and tell you plainly what it needs. Request a residential estimate.
