Thunderstorm Wind in Okanogan County, Washington

A member of the public reported a tree on a home near Omak.

During the late night and early morning hours of June 25th a strong cold front transited eastern Washington. The front exploited mid level instability and a moist air mass as it crossed the Cascades and broke out into eastern Washington. A line of thunderstorms developed between midnight and 4 AM PST and transited west to east through the Cascades and the mountains of northeastern Washington. Many of these storms were severe with damaging outflow winds blowing down trees, damaging structures and producing power outages in the Cascades and the Okanogan Highlands. Several fires were started by lightning strikes as well. The line weakened as it moved through north Idaho with no further damage reports, and passed into Montana by 7 AM PST, ending further thunderstorm activity.

Many people confirmed this event's damage with pictures of buildings and hundreds of trees lost in small, localized areas.