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Fall 2025 and Winter 2025/2026 Weather Forecast: La Niña's Influence
• The Fall 2025 forecast indicates a weak La Niña event, which is expected to influence weather patterns across the Northern Hemisphere, particularly in North America, potentially leading to a cold reversal in winter.
• La Niña, the cold phase of the ENSO oscillation, is characterized by cooler surface waters in the tropical Pacific Ocean and is known to impact global weather systems.
• Analysis of past weak La Niña events suggests a warmer Fall across much of the U.S. and southern Canada, a 'calm before the storm' pattern, with below-normal temperatures in Alaska and the Pacific Northwest.
• The ECMWF and NMME models predict a warmer/milder Fall season across the United States, with a high-pressure system dominating, especially in the first half of the season.
• The snowfall forecast for November shows less snowfall in the northeastern and western U.S., but more snowfall in the central Rockies, Appalachians, and parts of Canada.
• The winter forecast indicates a potential for a colder winter, with a cold anomaly over much of southern Canada and the U.S., suggesting a low-pressure system over Canada and a northerly flow of colder air.
• The January 2026 forecast for Europe shows a broad high-pressure blocking pattern, suggesting a colder northerly to northeasterly flow across the continent.
https://www.severe-weather.eu/long-r...tes-canada-fa/