Forecasters Issue La Niña Update
Summary
La Niña conditions are expected to decrease over the winter, likely shifting to a neutral climate pattern by early 2026, according to the National Weather Service. La Niña and El Niño are parts of a recurring climate pattern called ENSO, affecting weather patterns like temperature and rainfall across different regions. Additionally, an atmospheric river event is predicted to bring heavy rain and snow to parts of Washington, southeastern Alaska, and British Columbia.Key Facts
- La Niña is predicted to end, transitioning to a neutral climate phase by early 2026.
- ENSO (El Niño-Southern Oscillation) involves shifting warm and cool ocean phases affecting global weather.
- During La Niña, the Pacific Ocean trade winds are stronger, pushing warm water toward Asia and bringing cooler conditions to parts of the Americas.
- La Niña often causes droughts in the southern U.S. and heavy rain in the Pacific Northwest and Canada.
- El Niño, by contrast, weakens trade winds and can bring warmer, drier weather to the northern U.S. and wetter conditions to the Gulf Coast.
- An atmospheric river event is forecasted, bringing heavy rain, wind, and snow to some North American regions.
- Atmospheric rivers are narrow bands in the sky that carry a large part of the Earth's moisture from the tropics to other areas.
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