A potential “super” El Niño is being discussed, which could lead to increased global temperatures and more extreme weather. Various climate models are indicating a strong El Niño expected to start around June or July, peaking in November with ocean temperatures in the Pacific possibly soaring 2 C above average.
El Niño is part of a broader system known as the El Niño-Southern Oscillation (ENSO), impacting weather worldwide. When a specific region in the Pacific, Niño 3.4, experiences warmer waters, El Niño occurs; colder temperatures result in La Niña, with a neutral phase also possible.
The U.S. National Oceanic and Atmospheric Administration (NOAA) stated an 82% chance of El Niño developing between May and July, with a 96% likelihood of continuation from December to February. However, there is uncertainty about its peak strength.
Under normal conditions, Pacific trade winds move warm water westward, but during El Niño, this process reverses due to weakening trade winds. While a strong or ‘super’ El Niño could develop this year, its effects on Canada are not expected this summer but may have global repercussions.
The impact of El Niño on Canada is typically felt during winter, with warmer winters in Eastern and Central Canada. The country experienced its warmest winter in 2023-2024 during the last strong El Niño, with a forecast of even higher anomalies this time around.
Climate scientists emphasize that the combination of El Niño and ongoing global warming could lead to record-breaking temperatures in 2027. They caution that while El Niño can cause extreme conditions, the primary concern should be climate change, which worsens with continued fossil fuel use.
With Canada experiencing its warmest winter on record and the U.S. facing unprecedented warmth, the influence of climate change is evident. Weather extremes like heavy rainfall, droughts, and heat will be exacerbated by El Niño globally. Despite a quieter hurricane season in Atlantic Canada, the West faces an increased wildfire risk in 2027 due to prolonged drought conditions.