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El Niño finally lost its grip on global weather in June, but La Niña’s arrival was delayed repeatedly, leaving an extended period of neutral conditions in place through the summer and fall.
Southern California had become increasingly arid since late summer 2024, as storm systems predominantly affected the Pacific Northwest and Northern California instead, due to El Niño–Southern Oscillation (ENSO) changing from El Niño to La Niña, which had emerged by January 2025 as a weak La Niña.
NOAA's Climate Prediction Center (CPC) announced Thursday that water temperatures in critical parts of the Pacific Ocean had finally reached the threshold required for La Niña to emerge in December.
La Niña often creates weather patterns that increase hurricane activity in the Atlantic Basin, which if it forms could still affect the tail end of this year's season. It also affects winter ...
la_nina_pattern_temps.png Chris Dolce has been a senior meteorologist with weather.com for over 10 years after beginning his career with The Weather Channel in the early 2000s. Show comments
La Niña was last in place from 2020 to 2023 — a period of time that included California's driest three years on record. The arid stretch shrank reservoirs to record lows, triggered Southern ...
The National Oceanic and Atmospheric Administration’s Climate Prediction Center says there is a 60% chance that a weak La Nina event will develop this autumn and could last until March. La Nina is part of a natural climate cycle that can cause extreme weather across the planet — and its effects vary from place to place.
El Niño has been shaping the weather across North America all winter, but the tides are changing, and a major shift is on the horizon. On Thursday, NOAA issued a La Niña watch, explaining that ...