U.S.

Pacific Northwest Flood Crisis: Atmospheric River Sparks New Avalanche Threats

Pacific Northwest Flood Crisis: Atmospheric River Sparks New Avalanche Threats
Pacific Northwest Weather
Flash Flooding
Avalanche Risk

A powerful atmospheric river has unleashed flash flooding across the Pacific Northwest, with a new storm system poised to worsen conditions through Tuesday. Heavy rain, mountain snow, and winds up to 80 mph threaten Washington, Oregon, Montana, and Idaho, raising risks of road washouts, avalanches, and rapid snowmelt flooding.

Eastern Washington’s Spokane region absorbed 3–6 inches of rainfall this weekend, collapsing roads and infrastructure.

Flooding occurred on US 2 just west of the Fairchild AFP in Washington State,
reported state officials. Western regions now face similar threats as the incoming storm targets coastal and inland zones.

Key impacts include:

  • Flood watches across Montana and Idaho due to combined rain and snowmelt
  • Avalanche warnings in the northern Rockies’ highest elevations
  • Coastal waves surging up to 34 feet along the West Coast

Meteorologists warn the atmospheric river could destabilize snowpack, triggering landslides and overwhelming drainage systems. Residents in flood-prone areas are urged to avoid travel and monitor emergency alerts.

This relentless weather pattern underscores the Pacific Northwest’s vulnerability to extreme precipitation. With critical infrastructure already damaged, officials stress preparedness as the region braces for another 48 hours of severe conditions.