Climate
Jun 16, 2026
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6 min read
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Understanding El Niño and Its Impact on North American Weather
How ocean surface temperatures in the Pacific shape winter storms, droughts, and heatwaves across the Americas.
What is El Niño?
El Niño is a climate pattern characterized by unusual warming of surface waters in the eastern tropical Pacific Ocean, affecting global atmospheric circulation.
1. The Jet Stream Shift
Warm water pushes the Pacific jet stream south, leading to wetter and cooler conditions across the Southern US.
2. Warmer Northern Winters
Conversely, Western Canada and the Northern US typically experience milder and drier winters during El Niño years.
3. Impact on Hurricanes
Wind shear increases in the Atlantic, often suppressing hurricane development, while active storm seasons occur in the Pacific.
