Winter 2026/2027 Forecast: Super El Niño and Polar Vortex Signals
Winter 2026/2027 Forecast: Super El Niño and Polar Vortex Signals
US · Published Aug 26, 2026
The upcoming Winter 2026/2027 is expected to be heavily influenced by a rare Super El Niño event, which is already showing signs of record-breaking strength.
This phenomenon is characterized by significant ocean temperature anomalies, with values exceeding 6°C (11°F) above normal in the tropical Pacific.

Impact & Risks

The Super El Niño and potential Polar Vortex disruptions could lead to significant weather impacts across the Northern Hemisphere. In North America, warmer-than-average temperatures are expected in Canada and the northern United States, while cooler conditions and increased precipitation are forecast for southern regions. Snowfall deficits are likely in the Pacific Northwest and Great Lakes, while above-average snowfall is anticipated in the Sierra Nevada and Southern Rockies. In Europe, mild westerly flows may limit snowfall in lowland areas, with better snow conditions at higher elevations in the Alps. The Polar Vortex weakening could increase the risk of cold-air outbreaks, particularly in mid-to-late winter, affecting energy demand and transportation. (Source: Severe Weather EU, Source time: Wed, 26 Aug 2026 07:46:00 GMT)

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