Australia's snow season in 2026 has been underwhelming, with a significant decline in snow depth affecting ski resorts and local businesses. Climate expert Andrew B. Watkins highlights the main factors contributing to this year's poor snow conditions, including the El Niño phenomenon and other climate drivers.
Understanding the Climate Drivers Behind Snow Seasons
The snow season in Australia is influenced by several climate drivers. Among the most significant are El Niño and La Niña, which refer to temperature and wind variations over the Pacific Ocean. El Niño years typically result in drier and warmer weather, leading to less snow. Conversely, La Niña often brings cooler temperatures and higher rainfall, which can encourage more snowfall.
In Australia, El Niño conditions usually mean below-average rainfall and warmer temperatures during winter. For instance, in the eastern regions, this can result in maximum snow depths about 35 cm (14 inches) less than average. On the other hand, La Niña can lead to increased snowfall, but it can also bring mild temperatures that result in warm rain, which is detrimental to snow accumulation.
The Role of the Indian Ocean Dipole and Southern Annular Mode
Another factor affecting Australia's snow season is the Indian Ocean Dipole (IOD). A positive IOD indicates cooler ocean temperatures near Indonesia, often resulting in less winter rain and snow for southeastern Australia. Conversely, a negative IOD usually correlates with increased snowfall.
The Southern Annular Mode (SAM) also plays a crucial role. A positive SAM means weather systems bringing snow are located closer to Australia, while a negative SAM can draw in cold air and moisture from Antarctica, providing better conditions for snow. A combination of La Niña, a negative IOD, and a negative SAM typically results in optimal snow conditions.
The Current Snow Season and Its Challenges
As of July 2026, Australia is experiencing an El Niño phase, along with a positive SAM and a neutral IOD, creating conditions for a warmer and drier winter. Ski resorts are struggling, with Spencers Creek reporting only 35 cm (14 inches) of snow and Mount Hotham at 28 cm (11 inches) as of July 7. These figures are significantly lower compared to previous years, indicating a concerning trend.
The last few years have seen poor starts to the snow season, with 2023 and 2015 also recording disappointing snow depths. This year marks a worrying pattern, as global warming continues to reduce snowfall and alter alpine landscapes in Australia.
- 1957: Poor snow start
- 1967: Similar conditions
- 1982: Decline in snow depth
- 1997: Notable lack of snow
- 2020: Poor snow season
- 2023: Below average snow
- 2026: Current unsatisfactory conditions
Climate change, driven by fossil fuel emissions, is exacerbating these issues, leading experts to warn that without reducing greenhouse gas emissions, Australia's snow seasons may continue to decline.
🤖 This article was rewritten by Feed and Figures' editorial AI from a report originally published by Phys.org. Facts and quotes are preserved from the original; the rewrite focuses on clarity and structure. For the unedited original, see the source link below.
