Add Siberian snow to the list of things that can influence how bad the winter weather will be in the United States, according to new research.

Researchers discovered that snow piling up over a band of frozen tundra from Siberia to far-northern Europe may have as much effect on the climate of the U.S. as the much-better-known weather makers El Niño and La Niña.

To understand how cold (or warm) the winter season will be in the United States, researchers and weather forecasters should also take a closer look at the snow pack in northern Eurasia laid down the previous fall, said the researchers.