On 17 May and 27 June 2011 severe cyclonic storms damaged several hundred hectares of spruce forest (Picea schrenkiana) in the Tian Shan Mountains. Bark beetle populations increased rapidly in dead and damaged trees, particularly Ips hauseri, I. typographus, I. sexdentatus, and Piiyogenesperfossus (all Coleoptera: Curculionidae), and there is concern about the likelihood of a catastrophic bark beetle outbreak. Little is known about the frequency, extent, or severity of either large storm events or bark beetle outbreaks in the Tian Shan Mountains. The ecology and outbreak dynamics of I. hauseri, the predominant native bark beetle, are also poorly known. We undertook a dendrochronological study to determine the frequency of bark beetle outbreaks in the Tian Shan spruce forests.