A powerful oceanic Kelvin wave has intensified, effectively ending the multi-year La Niña influence. The latest ECMWF and UKMO models reveal a stronger El Niño signature in Summer 2026 pressure patterns compared to earlier forecasts.

Key impacts expected:

• A low-pressure area is forecast over eastern Canada and the northeastern United States during Summer 2026.
• Above-normal temperatures are anticipated across the northwestern United States and western Canada.
• Increased rainfall is predicted for the western, central, and northeastern United States, as well as the Midwest and southeastern Canada.
• Conversely, less precipitation is expected over the far southern United States and southern and central Canada.

The average-to-upper value of forecasts shows a very high chance for a Super El Niño to develop. This phenomenon could disrupt global weather patterns significantly.

Officials have not disclosed specific timelines for when these changes will take full effect. The ENSO cycle typically alternates between warm and cold phases every 1-3 years, which can have profound impacts on global weather systems.

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