Представлены результаты первых двух лет изучения последствий катастрофического ветровала на территории Висимского заповедника. Таксационные показатели древостоев на постоянных пробных площадях и трансектах показывают масштабы ветровала в зависимости от типа леса, положения в рельефе. Дана характеристика первых этапов сукцессий растительности в западинах вывалов. The results of study for first two years of consequences of catastrophic windfall, affecting the territory of Visim reserve, are addused. Tree mensuration indexes on the permanent sample plots and transects demonstrate hte scale of windfall, depending on forest type, site in relief. Characteristic of original stages of succession in troughs, created by uprooted trees, is made (for nemorose spruce forests). 26 species of plants of original forest floor vegetation occupied mineralized sub-strat of troughs for two years after windfall. Rubus idaeus, Equisetum sylvaticum, Chamerion angustifolium, Stellaria bungeana are dominants. The area of such patches after windfall make up from 206 to 858 m2 per ha and can reach 10% of area, while before windfall this number in old-growth forests of reserve didn’t exceed 0,1% (0,50—5,96 m2 per ha). In spite of catastrophic character of windfall, catastrophic changes in the communities of primeval forests have not occur: all coenotic elements have survived.