Sun Jan 12 21:30:00 UTC 2025: ## La Niña Officially Arrives, Bringing Potential for Wetter, Colder Winter in Western Washington
**Seattle, WA** – After a months-long wait, the La Niña climate pattern has officially arrived, according to KOMO News Meteorologist George Waldenberger. La Niña, the opposite of El Niño, is characterized by cooler-than-normal waters in the equatorial Pacific Ocean and is part of the broader El Niño Southern Oscillation (ENSO) cycle.
The confirmation comes as Pacific Ocean water temperatures finally dropped below the benchmark for La Niña conditions – 0.5 degrees Celsius colder than normal. This shift in ocean temperatures impacts the jet stream, influencing weather patterns across the U.S.
While La Niña typically brings drier conditions to Southern California (currently experiencing severe drought and wildfires), western Washington can expect wetter and colder weather, with increased snowfall in the mountains. However, current snowpack levels in some areas of the Washington Cascades are below normal, despite recent snowfall.
The delayed arrival of La Niña, after the end of the El Niño phase last June, has puzzled scientists. Michelle L’Heureux of NOAA’s El Niño team attributes the delay to unusually warm ocean temperatures in recent years.
Nationally, La Niña tends to cause drier conditions in the South and West, while increasing rainfall in parts of Indonesia, Australia, and southern Africa. While it often leads to more Atlantic hurricanes, this La Niña is expected to dissipate by summer. Studies suggest that La Niña-related droughts are more economically damaging than El Niño weather extremes. The previous La Niña ended in 2023 after an unusually long three-year period.
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