• Weak La Niña supports wet north-dry south pattern across the western U.S. through March 2026

    ByTeo Blašković

    Experimental seasonal forecasts from the Center for Western Weather and Water Extremes (CW3E) suggest that a weak La Niña is reinforcing a wet–north, dry–south precipitation pattern across the western United States during January–March 2026. The outlook shows high-confidence signals for below-normal precipitation in Southern California, while model uncertainty remains higher across central and northern California.

  • After historic flooding in Washington, a new atmospheric river is forecast to impact the U.S. West Coast

    ByTeo Blašković

    Historic flooding caused by a major atmospheric river earlier this week impacted large parts of western Washington state, prompting evacuations, emergency declarations, and record river levels. As impacts from that event persist, another strong atmospheric river is forecast to reach the Pacific Northwest on Sunday, December 14, 2025, bringing a prolonged period of precipitation to Washington, Oregon, and northern California through mid-week.