Key Takeaways
- Southern Argentina received unexpected snowfall during early April 2026, transforming the typical landscape.
- Increased precipitation was noted due to strong winds, which carried moisture from the windward side of the Andes.
- The snow quickly melted, leaving only the highest peaks covered as temperatures rose shortly after the storm.
Snow Blankets Southern Patagonia
On the eastern slopes of the Andes, southern Argentina’s arid plains typically showcase dry and brown landscapes. However, a storm in early April 2026 deposited a rare blanket of snow across the region. This phenomenon was visually captured by the MODIS (Moderate Resolution Imaging Spectroradiometer) on NASA’s Terra satellite on April 3.
Atmospheric scientist René Garreaud from the Universidad de Chile noted that early fall has experienced wetter than normal conditions, with satellite data indicating above-average rainfall from late March to early April. Precipitation is usually concentrated on the western side of the Andes, but strong winds can transport snow across to the Argentinian side, as demonstrated in the MODIS imagery.
In the imagery, snow is shown clinging to higher elevations, while lower valleys—especially those draining glacial lakes—remain bare. A more detailed view from Landsat reveals a distinct snow line near Lago Argentino, where the water’s milky blue and turquoise hues are attributable to fine sediments known as glacial flour, ground down by the area’s abundant glaciers.
Despite the picturesque winter scene, the snow cover was short-lived. A subsequent satellite image dated April 4 indicated that the majority of the snow had melted, leaving only the tallest mountain peaks snow-capped.
The rapid transition demonstrates the region’s variable climate and is a reminder of how quickly conditions can change in southern Patagonia.
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