This post first appeared on NASA Earth Observatory.
Winter made a bold—if late—entrance to the mountains in southeastern Australia. Much to the delight of skiers Down Under, a period of seasonal weather in July 2024 brought significant accumulations to the Snowy Mountains in New South Wales.
The OLI (Operational Land Imager) on Landsat 8 captured this wintry image of Australia’s Snowy Mountains on July 28. Part of the Australian Alps, the range is home to the country’s tallest peaks, including Mount Kosciuszko at 2,228 meters (7,310 feet), as well as several popular ski resorts. Peak snow season in this region usually lasts from June to August, although snow commonly falls at higher elevations in May and can linger through October.
Winter got off to a slow start in the Snowy Mountains in 2024, however. Slopes were mostly bare for the traditional opening of the ski season in early June, according to news reports. Meteorologists attributed the lack of snow to blocking highs, or strong high pressure systems, that persisted over the Great Australian Bight.
Weather patterns changed on July 19, and heavy snow reached the mountains. On July 21, the Thredbo ski resort reported that 59 centimeters (23 inches) of snow had fallen during the storm. Smaller accumulations came in subsequent days. Starting July 28, a strong cold front delivered “unusually low” temperatures to parts of New South Wales and yet more snow to the mountains. According to news reports, some of Australia’s extreme winter weather in 2024 was influenced by a rare sudden stratospheric warming event over the Antarctic.
Variable snow years are the norm in the Australian Alps, according to the Australian Bureau of Meteorology. Climate patterns such as El Niño, La Niña, and the Indian Ocean Dipole modulate each winter’s snowpack. Despite the significant year-to-year variability, long-term observations point to a thinning alpine snowpack. Maximum snow depth has trended down since the late 1950s, the agency reported, adding that the declines are linked with warming trends. The annual average temperature has risen about 1.4 degrees Celsius (2.5 degrees Fahrenheit) in the region since 1950.
NASA Earth Observatory image by Michala Garrison, using Landsat data from the U.S. Geological Survey. Story by Lindsey Doermann. Most materials published on the Earth Observatory, including images, are freely available for re-publication or re-use.
