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Heavy snow can turn a healthy-looking tree into a serious hazard in just a few hours. As snow accumulates on branches, the added weight can cause limbs to bend, crack, or break. Trees with existing structural problems are especially vulnerable.
The good news is that many of the warning signs can be spotted before the next major snowstorm.
If you have large trees near your home, driveway, vehicles, or other structures, knowing what to look for can help you address potential hazards before winter weather does the damage for you.
1. Large Dead or Dying Branches
Dead branches are one of the biggest concerns during heavy snow.
Unlike healthy branches, dead wood is often brittle and less capable of bending under additional weight. When several inches of wet snow accumulate, these branches can snap unexpectedly.
Look for:
- Bare branches that remain attached throughout the winter
- Large dead limbs in the upper canopy
- Broken or hanging branches
- Areas of missing bark or visible decay
- Branches with no buds or signs of new growth during the growing season
Large dead limbs over walkways, driveways, or structures deserve particular attention.
2. Weak or Narrow Branch Unions
Where two or more major branches meet is known as a branch union. Some unions form stronger connections than others.
Branches that grow together at a narrow angle can create a weak point, especially when included bark becomes trapped between them. Snow and ice add significant leverage to these unions, increasing the possibility of splitting.
Pay close attention to large branches that form tight, V-shaped connections rather than stronger, wider U-shaped unions.
3. Long, Overextended Branches
Branches that extend a long distance from the trunk can become heavily loaded during a snowstorm.
The farther a branch reaches from the trunk, the more leverage snow can create. A branch that normally supports its own weight may struggle when several inches of heavy, wet snow accumulate along its length.
Long horizontal limbs are especially important to inspect when they extend over:
- Homes
- Driveways
- Vehicles
- Decks
- Play areas
- Walkways
4. Cracks in the Trunk or Major Limbs
Visible cracks are a major warning sign.
A crack may indicate that a tree has already experienced structural stress. Additional snow weight can cause an existing crack to widen or lead to a complete failure.
Look for vertical cracks, deep seams, cavities, or areas where two major stems appear to be separating.
If you can see a significant crack in a major limb or the trunk, it is best to have the tree evaluated by a qualified tree professional before heavy snow arrives.
5. Multiple Trunks
Trees with multiple trunks can sometimes have increased structural risk, particularly when the trunks originate from the same area of the base.
When snow loads the canopy, multiple stems may experience different forces. If the connections between the stems are weak, the tree can be more susceptible to splitting.
This doesn’t mean every multi-stemmed tree is dangerous. However, multiple trunks combined with included bark, cracks, decay, or poor branch structure are worth having evaluated.
6. Signs of Decay
Decay can weaken a tree from the inside out, making structural problems difficult to identify from the ground.
Some potential signs include:
- Mushrooms or fungal growth near the base
- Cavities or hollow areas
- Soft or deteriorating wood
- Dead sections of the canopy
- Large wounds
- Loose or peeling bark
- Previous storm damage
A tree can appear relatively healthy while still having significant internal decay.
7. Previous Storm Damage
If your tree has already suffered damage from wind, lightning, ice, or previous snowstorms, it may be more vulnerable during the next storm.
Look for old broken limbs, partially attached branches, split stems, or areas where the tree has been damaged and never properly addressed.
Previous damage doesn’t necessarily mean a tree needs to be removed. In many cases, proper pruning or structural assessment can reduce the risk.
8. Excessively Dense Canopy Growth
A dense canopy can catch and hold more snow.
Trees that have excessive or poorly structured growth may accumulate substantial amounts of snow across their branches. When that weight is distributed unevenly, individual limbs can experience significant stress.
Proper pruning can sometimes improve branch structure and reduce the likelihood of failures.
However, avoid removing large amounts of live growth simply to prepare a tree for winter. Improper pruning can create additional problems and weaken a tree over time.
9. Leaning or Unstable Trees
A noticeable lean doesn’t automatically mean a tree is dangerous. Some trees naturally grow at an angle.
The concern is when a tree has developed a new lean or shows signs that the soil or root system is becoming unstable.
Watch for:
- Recently developed leaning
- Raised or cracked soil around the roots
- Exposed roots
- A lifting root plate
- Cracks in the ground near the base
- Significant changes after a storm
Heavy snow can add additional stress to an already unstable tree.
How Much Snow Is Too Much?
There isn’t one specific amount of snow that makes a tree dangerous.
Wet, heavy snow can weigh significantly more than light, powdery snow. The species, size, age, health, branch structure, and condition of the tree all affect how much weight it can safely support.
A tree with strong branch structure may handle a heavy snowfall without a problem, while a tree with decay or weak unions could fail under much less weight.
That’s why the condition and structure of the tree matter just as much as the amount of snow.
Should You Remove Snow From Tree Branches?
If snow is accumulating heavily, homeowners sometimes try to remove it from branches. However, this needs to be done carefully.
Avoid aggressively shaking or striking branches. Doing so can cause already stressed limbs to break.
For smaller trees and accessible branches, gently brushing light snow upward and away from the branches may help. Never climb a tree or use a ladder during snowy or icy conditions to remove snow.
For large trees or trees with obvious structural problems, it is safer to have a professional assess the situation.
When Should You Have Your Tree Inspected?
If you notice cracks, large dead branches, significant decay, weak branch unions, or recent changes in the tree’s stability, don’t wait until the next snowstorm to address them.
A professional tree assessment can help determine whether the tree needs pruning, additional monitoring, or more extensive work.
Taking care of structural problems before winter can reduce the risk of broken branches and unexpected property damage.
Protect Your Trees Before the Next Snowstorm
Heavy snow is something every Michigan homeowner should take seriously, but preparation can make a big difference.
Taking a few minutes to inspect your trees before winter weather arrives can help identify obvious warning signs. If you’re unsure about the condition of a large tree or notice a potential structural problem, a professional evaluation is the safest way to determine what should be done.
At Screaming Timber Arbor Care, we help homeowners identify tree hazards and determine the best course of action for keeping their properties and trees safe.
Don’t wait until a heavy snowfall exposes a problem. If you’re concerned about a tree on your property, contact Screaming Timber Arbor Care for a professional assessment.