Portland, Oregon – A single rumble of thunder today is your signal to act immediately, as lightning can strike within 10 miles of storms anywhere across Washington and Oregon during the active spring and summer season.
According to the National Weather Service, lightning often strikes far beyond the heaviest rain, even in the Pacific Northwest where storms are less frequent west of the Cascades but can intensify quickly. Warmer months increase instability across both states, with higher lightning frequency east of the Cascades and in elevated terrain.
In Oregon, high-risk areas include Portland’s Waterfront Park, the Willamette River corridor, and I-5, where outdoor activity leaves people exposed. Central Oregon cities like Bend see elevated risk due to dry thunderstorms and open terrain along US-97. In Washington, Seattle’s Gas Works Park and I-5 corridor face sudden lightning threats, while Spokane and eastern Washington see more frequent strikes tied to inland storm development.
Lightning kills about 20 people annually in the United States, with many incidents tied to hiking, camping, and outdoor recreation. In the Pacific Northwest, hikers in the Cascades and those in exposed high desert areas are especially vulnerable due to limited shelter and fast-changing weather.
If you hear thunder, you are already within striking distance. Move indoors immediately into a fully enclosed building or a hard-topped vehicle. Avoid open areas, ridgelines, and water. Wait at least 30 minutes after the last thunder before returning outside.
Storm chances will continue across Washington and Oregon through the season, with additional lightning alerts possible as conditions evolve.
