An early autumn storm has left a fleeting layer of snow across the high plains of southern Argentina, as observed by NASA’s MODIS (Moderate Resolution Imaging Spectroradiometer) on the Terra satellite. This striking transformation was documented on April 3, 2026, showcasing the stark contrast between the typically dry landscape and the fresh coat of white.
The image reveals the eastern side of the Andes, where the arid plains extend from the mountains to the Atlantic coast. Normally characterized by dry, brown terrain interspersed with vibrant glacier-fed lakes, the region was blanketed in snow following a storm in early April. Atmospheric scientist René Garreaud from the Universidad de Chile noted that this early fall has experienced above-average precipitation, particularly from late March through early April.
Snowfall Dynamics
Garreaud explained that while most precipitation typically falls on the western, windward side of the Andes, strong winds can transport some snow eastward into Argentina. This phenomenon is beautifully illustrated in the MODIS imagery, which captures the snowy expanse of the Patagonian Desert.
Detailed Observations from Landsat 9
Further insights were provided by the Landsat 9 satellite, which captured a detailed image of the snow-laden landscape on the same day. The image highlights a pronounced snow line along the outlet of Lago Argentino, where snow clings to higher elevations while the valleys below remain bare. The lakes in this area are notable for their milky blue or turquoise appearance, a result of fine sediment, or glacial flour, suspended in the water.
Transient Nature of the Snow Cover
Despite the widespread snowfall following the storm, the wintry scene was short-lived. Observations from the afternoon of April 4 indicated that snow had melted from all but the highest mountain areas, underscoring the transient nature of this early-season weather event.
These findings not only highlight the dynamic weather patterns in southern Patagonia but also emphasize the role of satellite technology in monitoring and understanding such phenomena. The imagery from MODIS and Landsat 9 provides valuable insights into the region’s climatic conditions and the interplay between precipitation and topography.
This article was produced by NeonPulse.today using human and AI-assisted editorial processes, based on publicly available information. Content may be edited for clarity and style.
