Super El Niño November weather forecast: US, UK, Canada and Europe

A potentially record-breaking Super El Niño is expected to become a major influence on Northern Hemisphere weather during November 2026, as unusually warm Pacific Ocean temperatures alter atmospheric circulation and shift storm tracks across North America and Europe.

The event has strengthened since spring and is forecast to approach peak intensity around December. Some climate models indicate it could become the strongest El Niño in more than 70 years, with temperature anomalies in the central equatorial Pacific projected to exceed +3°C.

• Super El Niño continues to intensify across the tropical Pacific, with forecasts indicating a December peak and the possibility of the strongest event in more than 70 years.
• November weather forecasts favor above-average temperatures across much of the United States, increased precipitation in southern regions and potentially changing conditions across Europe.
• An unusually early polar vortex disruption could influence weather in late November and December, increasing the possibility of Arctic cold outbreaks, although the strength and location of the impacts remain uncertain.

The developing atmospheric response is already visible. Rising air over the central and eastern tropical Pacific and sinking air over the Maritime Continent indicate substantial changes in tropical circulation that can influence weather systems thousands of miles away.

November forecasts show several characteristics associated with historically strong El Niño events across the United States and Canada. The northern United States is generally expected to experience warmer conditions, with a more active southern storm track increasing precipitation risks farther south.

Europe faces a less consistent outlook. Early November circulation patterns differ from those typically associated with strong El Niño events, while forecasts of an unusually early weakening of the polar vortex introduce the possibility of colder conditions later in the month.

The competing influences are particularly relevant for the winter 2026/2027 outlook. El Niño generally favors warmer conditions across northern North America, but disruptions of the stratospheric polar vortex can sometimes produce persistent high-pressure blocking patterns that allow Arctic air to move southward.

The timing, location and severity of any cold outbreaks remain uncertain, particularly because the predicted polar vortex disruption would occur considerably earlier than usual.

Super El Niño strengthens toward a potentially historic December peak

El Niño is the warm phase of the El Niño-Southern Oscillation (ENSO), a recurring climate phenomenon involving unusually high sea-surface temperatures in the equatorial Pacific Ocean and changes in tropical trade winds.

The cycle typically occurs every two to seven years and lasts approximately nine to 12 months, although particularly strong events can persist longer.

The current El Niño has intensified rapidly, with ocean temperature anomalies reaching exceptional levels. Analysis based on NOAA Coral Reef Watch data shows localized sea-surface temperature departures exceeding +8°C (+14.4°F) in parts of the tropical Pacific.

The strongest anomalies are concentrated farther east than usual, characterizing the event as an east-based El Niño.

The Climate Prediction Center’s weekly Niño 3.4 index has reached approximately +2.4°C, according to the cited late-October reporting. This index measures average temperature departures across a defined region of the equatorial Pacific and should not be confused with localized temperature anomalies.

El Niño events with Niño 3.4 anomalies above +2°C are commonly described as Super El Niño events. Forecast models indicate that the current event could move into the +3°C range, substantially exceeding that threshold.

The European Centre for Medium-Range Weather Forecasts (ECMWF) projects continued strengthening toward December. Its forecasts suggest that the event could become the strongest recorded in more than 70 years, based on historical comparisons using ERA5 climate data.

NOAA’s October outlook also identified a substantial probability of an exceptionally strong event, including an 83% chance that the October-December period would exceed the strength of previous events dating back to 1950 under its specified measurement criteria.

The World Meteorological Organization expects further intensification into December, with its latest seasonal forecast indicating that exceptional Pacific warming is likely to continue through the November 2026-January 2027 period.

How Super El Niño is changing atmospheric circulation

The effects of El Niño extend beyond ocean temperatures. Strong warming in the central and eastern equatorial Pacific reorganizes atmospheric circulation, changing the distribution of tropical rainfall, surface pressure and winds.

One of the most important mechanisms is the Walker circulation, a large-scale system of rising and descending air across the tropics.

During a strong El Niño, atmospheric pressure typically decreases over the central and eastern Pacific as warmer ocean waters support increased convection and rising air.

Meanwhile, higher pressure and stronger descending air develop over the western Pacific and Maritime Continent.

Analysis of atmospheric conditions during the second half of October identified pronounced rising motion over the central and eastern tropical Pacific, accompanied by strong sinking motion over the Maritime Continent.

These observations indicate that the ocean warming is already producing a substantial atmospheric response.

ECMWF forecasts extending into mid-November show the same general configuration remaining in place. The persistent circulation pattern includes an extensive area of rising air over the tropical Pacific and descending air farther west.

Meteorologists describe this type of persistent atmospheric configuration as a standing wave, in which large-scale pressure and circulation anomalies remain relatively stationary because they are continually reinforced by the underlying ocean temperature pattern.

The associated atmospheric bridge allows tropical Pacific conditions to influence the jet stream and pressure systems across the middle latitudes.

That connection helps explain why exceptionally strong El Niño events can influence storm tracks, precipitation and temperatures across North America and other regions.

Although the November forecast contains additional influences, including changes in the stratospheric polar vortex, the tropical Pacific is expected to remain a dominant driver of the broader seasonal circulation.

November 2026 weather forecast for the United States and Canada

November forecasts for North America display several characteristics historically associated with strong El Niño events, particularly warmer conditions across northern regions and increased precipitation along southern storm tracks.

The Weather Company’s November outlook favors above-average temperatures across much of the United States, especially the northern tier, Midwest and Great Lakes.

Warmer-than-average conditions are expected across the Northern Plains, much of the Mississippi and Ohio valleys and parts of the Northeast.

The southern United States may experience increased precipitation as the subtropical jet stream becomes more active.

Forecasts indicate a wetter pattern extending across parts of the Southwest, Gulf Coast and southeastern United States, with increased storm activity possible as the season progresses.

The Pacific Northwest is among the regions expected to experience below-average precipitation, while parts of the western United States could see cooler conditions.

These projections broadly resemble the typical El Niño pattern of a warmer northern United States and a wetter southern storm track.

The first week of November may nevertheless bring a temporary interruption.

AccuWeather long-range meteorologist Alex DaSilva told Newsweek that below-average temperatures were expected across the northern Midwest and Northeast during the opening week of the month.

Those regions had recently experienced relatively warm and dry weather, making the early-November cooling more noticeable.

The potential polar vortex disruption adds uncertainty to the second half of the month. If changes in the stratosphere propagate downward and alter the jet stream, parts of the eastern United States could experience additional cold outbreaks toward late November or early December.

For Canada, the strengthening El Niño is also relevant to broader North American circulation and storm-track development. The supplied forecasts, however, do not establish a detailed regional temperature or snowfall outlook for individual Canadian provinces.

The larger-scale pattern favors continued El Niño influence across North America, but the specific effects of a weakening polar vortex will depend on the development and location of high-pressure blocking systems.

UK and Europe November weather forecast: Cold outbreaks and storm risks

Europe faces a more complicated November outlook, with the developing circulation pattern differing from typical strong El Niño conditions during the beginning of the month.

Forecasts indicate that blocking high pressure could produce relatively dry and settled weather across parts of the United Kingdom in early November.

The longer-term outlook is less settled because El Niño and the possible disruption of the stratospheric polar vortex can influence European weather in different ways.

The Met Office has indicated that strong El Niño events can increase the likelihood of wetter, stormier and generally milder conditions across the UK and northwestern Europe during late autumn and early winter.

The influence can change later in the winter, when a weaker polar vortex may increase the potential for cold outbreaks.

The Met Office has cautioned that neither El Niño nor changes in the polar vortex can determine specific UK weather conditions without considering other atmospheric influences.

Some forecasters have raised the possibility of colder conditions arriving earlier than expected if the polar vortex weakens sharply.

A disrupted jet stream could allow Arctic air to move southward across northern and western Europe, potentially bringing freezing temperatures and snowfall.

The London Evening Standard has compared the possible circulation setup with the conditions associated with the Beast from the East in early 2018, when severe cold affected the UK and other parts of Europe.

Such an outcome remains a possibility rather than an established forecast.

For southern Europe, the broader El Niño-related outlook favors a greater possibility of mild, wet and windy conditions, including episodes of heavy rainfall and associated flooding risks.

Other longer-range scenarios suggest that northern Europe could experience prolonged cold and relatively dry periods later in winter if high-pressure blocking develops over the North Atlantic and Scandinavia.

These projections are not necessarily contradictory because they concern different periods and possible atmospheric configurations.

UK Environment Secretary Dame Angela Eagle has warned that the strong El Niño could contribute to wetter winters and more extreme storms.

The changing polar vortex forecasts may introduce additional variability, particularly during late November and December.

Polar vortex forecast points to an unusually early disruption

Alongside the strengthening El Niño, meteorologists are monitoring an unusually early weakening of the stratospheric polar vortex.

The polar vortex is a large-scale circulation of strong winds surrounding the polar regions, associated with low pressure and cold air in the upper atmosphere.

The stratospheric polar vortex develops more than six miles above the Earth’s surface, above the troposphere where most everyday weather occurs.

Although the term became widely familiar during the severe North American cold outbreak of January 2014, the phenomenon has been studied by scientists for well over a century.

A strong, relatively circular polar vortex generally helps maintain a stable circulation around the Arctic. When it weakens, stretches or splits, atmospheric conditions can become more favorable for cold air outbreaks farther south.

Computer models are forecasting substantial weakening and stretching of the vortex during early November 2026. Such disruptions can be associated with sudden stratospheric warming (SSW), when temperatures rise rapidly in the upper atmosphere and the circulation surrounding the pole weakens or reverses.

Some forecasts indicate that the stratospheric winds could reverse direction around November 4. An event of that timing would be exceptional. Historical records cited by meteorologists place the earliest previous major sudden stratospheric warming in late November, around November 28.

Judah Cohen, an MIT research scientist and director of seasonal forecasting at Atmospheric and Environmental Research, has suggested that the projected weakening could be unprecedented for such an early point in the season.

Meteorological model guidance has varied considerably on whether a major warming event will occur.

An assessment published by Netweather on October 27 estimated a 61% probability of a sudden stratospheric warming during the following two weeks, with individual model probabilities ranging from approximately 35% to 86%.

The highest estimate came from the ECMWF ensemble, while other forecast systems indicated lower probabilities. netweather.tv

The predicted weakening is significant, but a major stratospheric warming event has not been established simply because models project a reversal.

Could the polar vortex bring Arctic cold to the US and Europe?

Disruptions of the stratospheric polar vortex do not automatically produce severe winter weather at the surface. Their effects depend on whether changes in the upper atmosphere propagate downward and alter the tropospheric circulation.

That process can take approximately one to three weeks, and in some cases longer.

When the atmospheric response reaches lower levels, it can change the position and strength of the jet stream, allowing persistent blocking patterns to develop.

One possible configuration is a Greenland block, involving high pressure over Greenland and the North Atlantic.

Such a pattern can influence the North Atlantic Oscillation (NAO) and increase the likelihood of colder air reaching the eastern United States or parts of Europe. If the projected early-November disruption produces a significant surface response, its effects could become more apparent during late November or early December.

Meteorologist Max Velocity noted that a split vortex can allow cold air concentrated around the Arctic to reach middle latitudes approximately one to three weeks later, although this does not guarantee a substantial cold outbreak.

Most major sudden stratospheric warming events occur during the middle or latter part of winter, when Arctic cold air reservoirs are more established.

AccuWeather’s Alex DaSilva told Newsweek that an early-season disruption would have less cold air available than a comparable event during the middle of winter.

Meteorologists at The Weather Company have expressed similar reservations about the potential North American impacts.

Michael Shuman, another senior meteorologist with the team, said the Northern Hemisphere was not yet sufficiently advanced into winter to support particularly severe cold outbreaks, especially across North America.

Senechal suggested the orientation of the predicted stratospheric warming could favor more noticeable effects across Europe during late November and early December.

For the United States, any cooling influence may be more limited.

Winter 2026/2027 forecast: Super El Niño versus the polar vortex

The longer-range winter outlook remains dominated by expectations that El Niño will persist well beyond November.

NOAA’s Climate Prediction Center projects strong-to-very strong El Niño conditions through January-March 2027, with a probability exceeding 83% in its October forecast.

El Niño is also expected to persist into the March-May period, although the event’s intensity is forecast to decline as the year progresses.

Across North America, a typical strong El Niño winter is associated with warmer and often drier conditions across northern areas, together with a stronger southern storm track.

That southern jet-stream influence can increase precipitation across parts of the southern United States, including the Southwest, Gulf Coast and Southeast.

Some seasonal modelling also indicates opportunities for colder conditions across portions of the southern and central United States, depending on the location and strength of winter storm systems.

Higher snowfall totals are possible across the Intermountain West and the elevated terrain of the Southwest, where the interaction of colder air and increased moisture can support winter precipitation.

These patterns do not imply that every region will experience sustained cold or above-average snowfall.

Atmospheric G2, whose forecasting team is led by Todd Crawford, has projected that the November-through-January period could be the warmest on record across the United States.

Other meteorologists have emphasized the potential for short-lived colder periods within an otherwise warmer seasonal pattern.

The strength of El Niño is central to those assessments, but it is not the only relevant influence.

A weakened polar vortex could favor high-latitude blocking and Arctic air outbreaks, whereas a stronger, more stable vortex would generally reduce the likelihood of sustained southward cold-air displacement.

NOAA assessments have suggested that aspects of the developing winter circulation could favor a stronger polar vortex and reduce the likelihood of sudden stratospheric warming.

Other forecasters, including Severe Weather Europe, have identified model scenarios indicating weakening stratospheric winds, including potential further disruptions during December and January.

The apparent disagreement reflects uncertainty about how the circulation will evolve over different forecast periods, rather than a settled prediction of either prolonged warming or severe cold.

In Europe, the distinction is particularly important. Strong El Niño conditions may favor wetter and milder weather in parts of northwestern Europe during early winter, while subsequent blocking patterns could increase the chances of colder conditions.

The risk of severe snowfall or extended freezing temperatures remains dependent on the location of the jet stream, pressure systems and the eventual surface response to any stratospheric disruption.

The same uncertainty applies to the United States, where a generally warm November outlook does not exclude temporary cold spells or regional winter storms.

Forecasters can identify broad seasonal tendencies with greater confidence than individual weather events weeks or months in advance.

The exceptionally strong Pacific warming provides a substantial signal for the coming winter, but the early-November polar vortex forecasts introduce an additional source of uncertainty.