Finland braces for autumn storm as authorities warn of falling trees

This week, Finland is facing a significant autumn storm. Winds in parts of the country are reaching gale force, with speeds exceeding 20 meters per second in the south and east. Authorities anticipate that falling trees will be a common occurrence. Contrary to popular belief, older trees tend to withstand strong winds better than younger ones, explains Tomi Kivikorpi, chair of the Finnish Tree Care Association and an arborist.

According to Kivikorpi, older trees have adapted to varying weather conditions over their lifespans and possess a more stable trunk relative to their height, allowing them to endure stronger winds. He notes that the weakest trees are often those that have just met their maximum height but have not yet developed a robust trunk.

Several factors influence the likelihood of a tree falling, including its structure and environment. For instance, if vegetation or nearby buildings have been removed, this can alter wind patterns and increase the risk of tree toppling. In urban areas, issues often arise when tree roots have been disturbed, leaving the trees more vulnerable.

Kivikorpi emphasizes that various elements contribute simultaneously to tree stability; there is no simple rule regarding wind strength and tree falling. He mentions that trees in other parts of the world withstand hurricanes and typhoons.

Is there a way to protect beloved garden trees from autumn storms? Generally, Kivikorpi asserts that trees do not require human intervention. Tree uprooting is relatively rare, while falling branches pose a greater risk. Professionals can assess the risk factors of trees in advance. With autumn storms approaching, arborists are particularly busy as concerns about which trees will remain standing become more pronounced.