A major storm swept across the northwest U.S. Tuesday evening, battering the region with strong winds and rain and causing widespread power outages and downed trees that killed at least one person. The Weather Prediction Center issued excessive rainfall risks through Friday and hurricane-force wind warnings were in effect as the strongest atmospheric river — a large plume of moisture — that California and the Pacific Northwest

Though that type of weather system doesn’t often develop near Washington, the last one that impacted the Pacific Northwest was earlier this year in January. Bomb cyclones are weather systems that form when the storm’s central pressure drops more than 24 millibars in 24 hours.

Thousands of people across western Washington were without power Tuesday night as a bomb cyclone brought strong winds to the region.