El Niño

🌍 What El Niño Is — and Why It Matters El Niño is the warm phase of the El Niño–Southern Oscillation (ENSO), a recurring climate pattern driven by interactions between the tropical Pacific Ocean and the atmosphere. During an El Niño event, trade winds weaken, allowing warm surface water to move eastward toward South America. This shift alters global circulation, changing rainfall, temperature, and storm patterns across continents. Historically, strong El Niños have triggered droughts in Australia and Southeast Asia, floods in South America, and heatwaves worldwide. The 1997–98 and 2015–16 events were among the most powerful ever recorded, each causing billions in damages and pushing global temperatures to record highs. 🔥 The Current State of El Niño Development in 2026 As of mid‑May 2026, meteorological agencies including NOAA, Copernicus, and the World Meteorological Organization (WMO) report that the Pacific Ocean is warming rapidly, with sea‑surface temperatures about 0.5 °C above average in key monitoring zones such as the Niño 3.4 region. This threshold marks the early onset of El Niño conditions. Forecast models show unprecedented agreement that El Niño will strengthen through the year, with over 90 % likelihood of full development by autumn . Some projections even suggest a “super El Niño”, with anomalies exceeding 2 °C — levels comparable to or surpassing the 2015–16 event . The Pacific’s rapid transition from La Niña to El Niño is unusual. La Niña typically cools global temperatures, but its collapse this spring has allowed warm water to surge eastward, driven by westerly wind bursts and Kelvin waves — subsurface pools of heat rising toward the surface . 🌡️ Ocean and Atmospheric Signals April 2026 recorded the second‑highest global sea‑surface temperature outside polar regions, at 21 °C across 60° S–60° N . Marine heatwaves now stretch from the central equatorial Pacific to the U.S. West Coast. These anomalies are reshaping atmospheric convection, with cloud bands and rainfall shifting eastward, a hallmark of developing El Niño. The Southern Oscillation Index (SOI) — which measures pressure differences between Tahiti and Darwin — has begun trending negative, another indicator of El Niño’s strengthening. As the atmosphere couples with ocean warming, feedback loops reinforce the pattern: warm seas weaken trade winds, which in turn allow more heat to accumulate at the surface. 🌦️ Regional Impacts Already Emerging Asia and the Pacific The United Nations ESCAP warns that El Niño could amplify drought risks across Indonesia, Malaysia, the Philippines, and Timor‑Leste, where past events have caused forest fires, crop failures, and water shortages . Governments in these regions are already issuing early‑action alerts to prepare for reduced rainfall and heightened fire danger. India The India Meteorological Department (IMD) has reported an early onset of the southwest monsoon in the Andaman and Nicobar Islands, expected to reach Kerala by late May — a week ahead of schedule . While this early arrival seems promising, meteorologists caution that El Niño’s intensification later in 2026 could disrupt rainfall during August and September, potentially causing droughts in some regions and floods in others. Australia and the Pacific Islands Australia typically experiences hotter, drier conditions during El Niño years, increasing bushfire risk and reducing agricultural yields. Pacific Island nations, meanwhile, face water scarcity and coral bleaching as ocean temperatures rise. Americas In South America, El Niño often brings heavy rainfall and flooding to Peru and Ecuador, while parts of Brazil and Chile may see drought. North America could experience warmer winters and altered storm tracks, with the southern U.S. likely to receive more rain and the Pacific Northwest becoming drier. 🌡️ Global Temperature Outlook According to Carbon Brief, the first quarter of 2026 has already been the fourth‑warmest on record, and the developing El Niño could make 2026 the second‑warmest year ever, with a 19 % chance of surpassing 2024 . If the event strengthens further, 2027 could become the hottest year on record, as El Niño’s full effects typically peak several months after ocean warming. The WMO notes that nearly all climate models now predict above‑normal land temperatures globally for the next three months . This warming will compound existing climate‑change trends, intensifying heatwaves and extreme rainfall events. 🌾 Economic and Humanitarian Risks Strong El Niños have historically caused billions in economic losses. The 2015–16 event led to widespread crop failures, food‑price spikes, and disease outbreaks. The ESCAP report warns that similar patterns could re‑emerge in 2026, especially in regions with high poverty and dependence on subsistence farming . Agriculture in India, Southeast Asia, and Africa may suffer from erratic rainfall, while Latin America’s fisheries could be disrupted by changes in ocean currents and nutrient availability. Humanitarian agencies are preparing for potential food‑security crises and public‑health challenges, including vector‑borne diseases like dengue and malaria, which often surge during warm, wet periods. 🌊 Environmental Consequences El Niño redistributes heat and moisture globally, influencing ecosystems far beyond the Pacific. Coral reefs face bleaching as sea temperatures rise, while tropical forests may experience reduced rainfall and increased fire risk. In the Arctic, sea‑ice cover has already reached record lows for winter 2026, tying with 2025 for the smallest extent in the satellite record . This decline, combined with El Niño‑driven warmth, could accelerate polar melting and alter jet‑stream behavior, affecting weather patterns across the Northern Hemisphere. 🌐 Broader Climate Context While El Niño itself is a natural oscillation, climate change amplifies its impacts. A warmer atmosphere holds more moisture, intensifying rainfall and heatwaves. The WMO emphasizes that although greenhouse gases do not increase El Niño’s frequency, they magnify its consequences, making extreme events more damaging . This interplay between natural variability and human‑induced warming means that each new El Niño unfolds in a hotter baseline climate, pushing global systems closer to critical thresholds. If anomalies exceed +2 °C and atmospheric feedbacks persist, the 2026–27 El Niño could rival or surpass the 1997–98 and 2015–16 events .

Alan Jones·17 May 2026, 09:36

More in Climate

Climate

Will El Niño Bring Snow to the UK This Winter?

As autumn turns to winter, many weather enthusiasts begin asking the same question: will the UK see significant snowfall this year? Whenever a winter outlook is discussed, one climate phenomenon that frequently enters the conversation is El Niño. While El Niño can influence weather patterns across the globe, its effect on UK winters is often misunderstood. The relationship is far from straightforward, and while El Niño may increase the chances of certain weather patterns developing, it does not guarantee either a mild or snowy winter. Understanding how El Niño affects the atmosphere can help explain what it might mean for the UK's snow prospects this winter. What is El Niño? El Niño is a naturally occurring climate pattern that develops in the tropical Pacific Ocean. During an El Niño event, sea surface temperatures become warmer than average across large areas of the central and eastern Pacific. This warming alters global atmospheric circulation patterns, influencing weather in many parts of the world. The strongest effects are usually felt around the Pacific basin, affecting countries such as Australia, Indonesia and the western coast of the Americas. However, the impacts can extend much further through a series of atmospheric connections known as teleconnections. These distant links can sometimes influence weather patterns across Europe and the North Atlantic. While El Niño is thousands of miles away from the UK, changes in global atmospheric circulation can occasionally affect the position and strength of the jet stream, which plays a major role in determining British winter weather. El Niño and UK Winters One of the biggest misconceptions is that El Niño automatically leads to either colder or snowier winters in Britain. Historical records show that this is not consistently true. Some El Niño winters have been notably mild and wet, while others have featured cold spells and snowfall. The reality is that El Niño is only one piece of a much larger weather puzzle. The UK sits in a highly complex weather zone where several major atmospheric drivers interact. Factors such as the North Atlantic Oscillation (NAO), Arctic temperatures, stratospheric conditions and North Atlantic sea surface temperatures often have a more direct influence on British winter weather than conditions in the tropical Pacific. However, some meteorologists have identified a tendency for El Niño winters to favour periods of high pressure developing to the north of the UK. When this occurs, colder air from Scandinavia or the Arctic can occasionally be drawn southwards. Such setups can create opportunities for snowfall, particularly in northern and eastern parts of the country. The Importance of the Jet Stream The jet stream acts like a conveyor belt for weather systems crossing the Atlantic. Its position often determines whether the UK experiences mild Atlantic air or colder continental and Arctic air masses. During some El Niño winters, the jet stream can become disrupted or displaced from its usual position. This sometimes allows blocking areas of high pressure to develop at higher latitudes. A blocked weather pattern can be significant for snow lovers. High-latitude blocking often prevents the usual procession of mild Atlantic weather systems and increases the likelihood of colder air reaching the British Isles. However, these patterns are not guaranteed. Many El Niño winters still feature periods dominated by a strong Atlantic jet stream, resulting in mild, windy and wet conditions rather than snow. Looking at Past El Niño Winters Examining previous El Niño events reveals why forecasting winter weather months in advance remains challenging. The powerful 1997-98 El Niño coincided with one of the mildest winters on record across much of Europe. Snowfall was limited for many areas of the UK, and temperatures remained well above average. On the other hand, the 2009-10 winter followed an El Niño event and became one of the coldest and snowiest winters experienced in decades. Large parts of the country endured prolonged snow cover, severe frosts and widespread travel disruption. These contrasting examples demonstrate that El Niño alone cannot determine whether a particular winter will be snowy. Other atmospheric ingredients must align to produce significant cold and snow across Britain. Stratospheric Warming Events One factor that weather forecasters pay close attention to during winter is the possibility of a Sudden Stratospheric Warming (SSW) event. An SSW occurs when temperatures in the stratosphere above the Arctic rise dramatically over a short period. This can weaken or even disrupt the polar vortex, a large area of strong winds that normally keeps cold Arctic air locked near the Pole. When the polar vortex weakens, colder air can spill southwards into Europe and the UK. Some studies suggest El Niño conditions may slightly increase the likelihood of stratospheric disruptions occurring, although the relationship is still being researched. Should a significant SSW develop during winter, the chance of prolonged cold spells and snowfall in the UK could rise considerably. Regional Differences Across the UK Even during a cold winter, snowfall distribution is rarely uniform across Britain. Northern Scotland typically has the greatest chance of seeing significant snowfall because of its higher elevation and colder average temperatures. The Pennines, Scottish Highlands and Welsh mountains are also favoured locations. For lower-lying areas of England and Wales, snowfall often depends on the exact track of weather systems and the source of incoming air masses. A slight change in temperature can mean the difference between heavy snow and cold rain. Eastern parts of Britain can benefit when cold easterly winds develop, bringing snow showers from the North Sea. Meanwhile, western regions often rely on Atlantic weather fronts running into cold air already established across the country. What Could This Mean for This Winter? While El Niño may influence global circulation patterns, it should not be viewed as a direct predictor of UK snowfall. At most, it may slightly tilt the odds towards certain atmospheric configurations becoming more likely. The UK's snow prospects will ultimately depend on how several larger-scale weather drivers interact throughout the season. The behaviour of the North Atlantic Oscillation, the strength of the polar vortex, sea surface temperature patterns across the Atlantic and any stratospheric warming events may prove just as important, if not more so. For snow enthusiasts, the encouraging news is that El Niño does not rule out the possibility of a snowy winter. Historical examples show that significant cold spells can still occur when the right conditions develop. Equally, there is no guarantee of widespread snow simply because El Niño is present. Conclusion El Niño remains one of the most closely watched climate patterns in the world, but its influence on UK snowfall is indirect and often subtle. While it can affect global atmospheric circulation and occasionally help create favourable conditions for colder weather, the path to a snowy British winter involves many interconnected factors. As winter approaches, forecasters will be monitoring the jet stream, Arctic conditions and the polar vortex alongside El Niño itself. The combination of these elements will determine whether much of the UK experiences rain, frost or the sight many weather watchers are hoping for: widespread snowfall. For now, the possibility of snow remains very much on the table, but as always with British weather, patience will be required before the true picture emerges.

UK Storm·11 Oct 2026

Climate

El Niño set to be 'strongest in living memory', says Met Office

Meteorologists are warning that the developing El Niño in the Pacific Ocean is intensifying so rapidly that it may become the strongest event seen in living memory. The Met Office says ocean temperatures in key regions of the tropical Pacific are rising at a pace that surpasses anything observed in modern climate records, setting the stage for a year of significant global weather disruption. El Niño is a naturally occurring climate pattern, but its strength varies from year to year. Some events are weak and barely noticeable outside the Pacific basin; others are powerful enough to reshape weather patterns across the entire planet. This year’s event is showing all the hallmarks of a major episode: exceptional ocean warmth, strong atmospheric feedback, and widespread agreement among global climate models that the peak will be unusually high. A Rapidly Intensifying Ocean Warming At the heart of El Niño is a band of warm water that spreads across the central and eastern Pacific. Normally, trade winds push warm water westwards, allowing cooler water to rise near South America. During El Niño, those winds weaken, and warm water surges eastwards, altering the behaviour of the atmosphere above it. This year, sea‑surface temperatures in the central Pacific are already more than 2°C above average, and forecasts suggest they could exceed 3°C as the event peaks. That level of warming is extremely rare. Only a handful of El Niño events in the past century have reached similar strength, and early indicators suggest this one may surpass them. Ocean heat content — the total amount of heat stored in the upper layers of the ocean — is also at record levels. This background warming, driven by long‑term climate change, is acting like fuel for the developing El Niño, allowing temperatures to rise faster and higher than usual. Why This El Niño Stands Out Several factors make this year’s El Niño particularly noteworthy: • Unusual speed of development: The transition from neutral conditions to a strong El Niño has happened far more quickly than normal. • Exceptional ocean warmth: The Pacific is starting from a warmer baseline due to long‑term climate trends, giving this event more energy. • Strong model agreement: Forecast models from around the world are tightly clustered, all pointing towards a powerful peak. • Global temperature context: The world is already experiencing record‑breaking warmth, meaning El Niño’s additional boost could push global averages to unprecedented levels. Meteorologists say the combination of these factors makes this event “extraordinary” and potentially “historic”. Global Consequences: Heat, Drought and Flooding A strong El Niño has far‑reaching effects. Because the Pacific Ocean plays such a dominant role in global climate, any major disturbance there sends ripples across the atmosphere worldwide. South America Countries along the western and southern parts of the continent often experience drier‑than‑normal conditions during strong El Niño events. Argentina, Chile and parts of Brazil may face significant rainfall deficits, increasing the risk of drought, crop stress and wildfires. Australia and Southeast Asia El Niño typically brings hotter, drier weather to Australia, raising the likelihood of bushfires and heatwaves. Southeast Asia may also see reduced rainfall, affecting agriculture and water supplies. Africa Southern Africa is particularly vulnerable during strong El Niño years. Reduced rainfall can lead to crop failures, food insecurity and pressure on water resources. North America The United States often experiences a split pattern: wetter conditions in the southern states and warmer, drier weather in the north. Storm tracks can shift, influencing winter weather and seasonal extremes. Global Temperatures El Niño releases heat stored in the ocean into the atmosphere, temporarily boosting global temperatures. Scientists expect 2027 to challenge or exceed global temperature records, with a realistic chance of briefly surpassing 1.5°C above pre‑industrial levels. UK Impacts: A Wetter, Stormier Autumn Although the UK is far from the Pacific, El Niño can still influence our weather through changes in the jet stream. The Met Office says early signals point towards a wetter and more unsettled autumn, especially from late October into November. During strong El Niño events, the jet stream often becomes more active and shifts position, steering Atlantic low‑pressure systems towards north‑western Europe. For the UK, this typically means: • More frequent Atlantic storms • Periods of heavy rain • Increased risk of flooding, especially in western regions • Short bursts of colder air, as a lively jet stream can pull Arctic air southwards The timing is significant. Much of the UK has recently experienced prolonged dry spells and intense summer heat. While wetter weather may help replenish reservoirs and rivers, it also increases the risk of surface flooding on hard, dry ground that struggles to absorb sudden rainfall. What This Means for the Coming Months The peak of El Niño usually occurs around late autumn or early winter, but its effects can last well into the following year. For the UK and Europe, the most noticeable impacts will likely be felt between November and January, though global consequences will unfold throughout 2027. For the UK • Expect more unsettled weather than usual. • Flood‑risk management will be important, especially in areas already affected by summer drought. • Agriculture may face challenges as fields swing from dry to saturated. • Winter temperatures may fluctuate more sharply due to a more energetic jet stream. Globally • Some regions will face extreme drought, while others may see intense rainfall. • Heatwaves may become more frequent and severe. • Food production could be disrupted in vulnerable regions. • Humanitarian organisations may need to prepare for climate‑related emergencies. A Rare Climate Event Unfolding in Real Time Strong El Niño events are not common, and ones of this magnitude are exceptionally rare. Meteorologists, climate scientists and weather enthusiasts will be watching closely as the Pacific continues to warm and the atmosphere responds. For the public, the key message is awareness. While El Niño does not guarantee specific weather outcomes, it raises the likelihood of certain patterns — and this year’s event is powerful enough to influence weather across the globe. As the Met Office continues to monitor the situation, updates will become increasingly important. With a potentially record‑breaking El Niño unfolding, the world is entering a period of heightened climate variability that will shape weather patterns well into next year.

Alan Jones·21 Aug 2026

Climate

Driest July on record for England and Wales

The Driest July on Record: How England and Wales Reached a Historic Weather Milestone July 2026 will be remembered as a turning point in the UK’s climate story — a month defined by relentless sunshine, extreme heat, and an almost total absence of rainfall. According to provisional Met Office figures, England and Wales have both recorded their driest July since national records began in 1836, a staggering meteorological milestone that highlights the growing volatility of the UK’s weather patterns. Across both nations, rainfall totals collapsed to historic lows. England recorded just 6.5mm of rain, barely 10% of the long‑term average, and less than half of the previous record of 13.4mm set in 1911. Wales fared little better, with 9.3mm of rainfall, around 9% of its average and again well below its previous record of 22.6mm. These figures are not just unusual — they represent a profound departure from typical British summer conditions. A Month Without Rain For many regions, July passed almost entirely rain‑free. Southern England was hit hardest, with just 1.9mm of rainfall, making it the driest month ever recorded in that region since records began nearly two centuries ago. In fact, 19 counties — including Kent, Essex, Berkshire, Gloucestershire, Greater London and the Isle of Wight — saw 1mm or less of rainfall across the entire month. This extraordinary dryness was not confined to isolated pockets. Wales, too, saw widespread parched conditions, with the entire country falling into drought status by late July. Many areas went more than 40 days without measurable rainfall, leaving landscapes brown, brittle, and cracked under the relentless sun. Sunshine Records Shattered If the lack of rain was remarkable, the sunshine was equally unprecedented. Both England and Wales recorded their sunniest July on record, with England logging 305.6 hours of sunshine and Wales 308.0 hours — surpassing previous records set in 1911 and 1955 respectively. The Met Office confirmed that this was also the sunniest calendar month ever observed for both nations. The combination of cloud‑free skies and persistent high pressure created conditions more reminiscent of southern Europe than the traditionally temperate British Isles. Heatwaves and Drought: A Perfect Storm July’s extreme dryness did not occur in isolation. It followed four back‑to‑back heatwaves earlier in the summer, with temperatures repeatedly surging well above seasonal norms. These heatwaves intensified evaporation, dried out soils, and left vegetation highly stressed even before July began. By the end of the month, half of England and all of Wales were officially in drought, with water companies imposing hosepipe bans and restrictions on non‑essential water use. Farmers reported significant impacts on crops, with some warning of potential food shortages later in the year due to reduced yields. The National Farmers’ Union described harvest conditions as “unthinkable compared to only a decade ago,” noting that some crops were ready weeks earlier than normal due to accelerated ripening in the heat. Environmental Impacts Across the UK The consequences of July’s extreme dryness were visible across the landscape. Rivers and streams dropped to exceptionally low levels, wetlands shrank, and grasslands turned a uniform shade of straw‑yellow. Wildlife organisations warned of severe impacts on biodiversity, with birds, bees, butterflies, and other pollinators struggling to find water and suitable habitat. In urban areas, parks and gardens suffered heavily. London’s green spaces, including Kensington Gardens and Blackheath, were photographed looking more like Mediterranean scrubland than the lush summer lawns residents expect. A National Climate Turning Point The Met Office has been clear: July 2026 represents a “truly remarkable month” in the UK’s climate record. Met Office Science Manager Amy Doherty described the conditions as a “combination of record‑breaking dryness, exceptional warmth and unprecedented sunshine”, noting that such extremes are becoming increasingly common as the climate warms. Nationally, the UK recorded its third driest July on record, with just 28.9mm of rainfall, the lowest figure for the month since 1868. Scotland was the only nation to avoid breaking records, receiving around 69% of its average rainfall, though still below normal. Human Health and Safety The prolonged heat and dryness also had serious human impacts. The UK Health Security Agency reported 2,877 heat‑related deaths so far this year, with July’s conditions contributing significantly to the toll. Amber heat‑health alerts were issued for multiple regions, including London, warning of increased risks to older adults and those with pre‑existing conditions. Emergency services responded to increased incidents of wildfires, dehydration, and heat‑related illness. Public health officials urged people to stay hydrated, avoid peak sunshine hours, and check on vulnerable neighbours — advice more commonly associated with southern Europe than the UK. Why July 2026 Matters While Britain has experienced dry spells before, July 2026 stands out because of its scale, intensity, and the number of records broken simultaneously. The month delivered: • The driest July on record for England and Wales • The driest month ever recorded in Southern England • The sunniest month ever observed in both nations • Widespread drought conditions • Multiple heatwaves • Significant environmental and agricultural impacts This convergence of extremes underscores a broader trend: the UK’s climate is shifting. Heatwaves are becoming more frequent, rainfall patterns more erratic, and extreme weather events more intense. Looking Ahead With little rain forecast for early August, drought conditions are expected to persist. Water companies, farmers, and environmental agencies are preparing for continued strain on resources, while policymakers face renewed calls for a stronger national adaptation plan to help the UK cope with increasingly extreme weather. For residents of England and Wales, July 2026 will be remembered not just as a statistical anomaly, but as a vivid demonstration of how rapidly the climate is changing — and how urgently adaptation and resilience measures are needed.

Alan Jones·3 Aug 2026