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File: enso-blog-weak-la-nina-winters-map-20241022.png

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Alternate Text: Map of North America showing the La Niña pattern of snowier-than average years across the northern United States and below-average snowfall across the southern United States
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Map of North America showing the La Niña pattern of snowier-than average years across the northern United States and below-average snowfall across the southern United States

Image caption

January–March snowfall during 9 weak La Niña winters from 1959–2024 compared to the average for all January–March periods from 1991–2020. The long-term trend in snowfall over this period has been removed, meaning the maps better show the influence of weak La Niñas by themselves. NOAA Climate.gov map, based on ERA5 reanalysis data and analysis by Michelle L’Heureux.