Atmospheric Rivers Bring Heavy Rain to Pacific Northwest
Atmospheric Rivers Bring Heavy Rain to Pacific Northwest
US · Published Nov 11, 2026
• A series of atmospheric rivers is bringing significant rainfall, strong winds, and the potential for localized flooding to the Pacific Northwest. According to the Center for Western Weather and Water Extremes (CW3E), a weakening atmospheric river affected the region on Monday, November 9, with a stronger system expected on Tuesday, November
• Rainfall totals are forecasted to reach 5 to 8 inches (13 to 20 cm) in parts of western Washington, with lower-elevation areas receiving 1 to 3 inches (2.5 to 7.6 cm). The Olympic Mountains could see up to 5 inches (12.7 cm) of rain by late Thursday. Snow levels in the North Shore Mountains are expected to rise from 1500m to 2500m. California may also face heavy rain later this week as the storm systems progress southward.

Impact & Risks

The Pacific Northwest is experiencing persistent rain and strong winds, leading to localized flooding and high streamflow risks. Saturated ground conditions could exacerbate runoff into rivers and streams, raising the potential for flooding in Washington and Oregon. Coastal communities and areas along the western slopes of the Cascade Range are particularly vulnerable to heavy rainfall. Power outages have already been reported in Washington due to strong winds. While the overall risk of river flooding remains low, repeated storms could increase hazards in the coming days.

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