Winter 2026/27 Forecast Signals Strong Anomalies as North Atlantic Cold Blob Meets Super El Niño
Updated
Updated · Severe Weather Europe · Jul 3
Winter 2026/27 Forecast Signals Strong Anomalies as North Atlantic Cold Blob Meets Super El Niño
3 articles · Updated · Severe Weather Europe · Jul 3
Summary
Early winter 2026/2027 forecasts point to pronounced pressure and temperature anomalies across the United States, Canada and Europe, with models already aligning on an unusual large-scale pattern months ahead.
A cold North Atlantic “blob” east of Newfoundland has expanded and is projected to persist into late 2026, while a powerful Super El Niño strengthens in the tropical Pacific, creating a stark two-ocean contrast.
The Atlantic anomaly is running about 0.5 to 2 degrees colder than a year ago in its core area, and forecasters link similar setups to a positive Pacific-North American pattern in winter.
That pattern typically favors higher pressure over western North America and lower pressure over the central and eastern United States, supporting colder risks in the South and East while northern areas stay milder.
ECMWF, CanSIPS and CFS seasonal models all show a similar early-winter setup, while Europe is projected to trend warmer deeper into winter under a strengthening ridge tied to Super El Niño.
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Unprecedented Winter 2026/27: The Double Impact of Super El Niño and a Weakening AMOC
Overview
Winter 2026/27 is expected to be unlike any in recent memory, as a rare combination of a Super El Niño and a persistent North Atlantic Cold Blob converge. This unusual mix of powerful climate drivers presents a major challenge for forecasters and raises the potential for unprecedented weather anomalies across the United States, Canada, and Europe. El Niño, which can sometimes become exceptionally strong, typically develops between late summer and early fall, while the North Atlantic Cold Blob remains a prominent feature. Together, these factors create a highly uncertain and potentially impactful winter season.