The Scariest Part of This Season’s Weird Weather Is Coming Soon

By:  Eric Holthaus

This year’s holiday season has been full of extreme weather, with weird anomalies from coast to coast—like a script worthy of a Syfy network movie.

The week of Christmas was the warmest on record by far for a vast stretch of the eastern United States from Texas to Maine. In Philadelphia, every single day this month has been warmer than normal—if that word even retains meaning during a month like this.

While this month’s extreme weather is primarily due to an atmosphere supercharged by the record-breaking El Niño, it’s also an example of the kind of unnerving meteorological event that’s becoming more likely as climate change plays an increasingly large role in daily weather. The New York Times called it “a fitting end to the warmest year on record.” Together, El Niño and climate change have combined for a year unlike any other in human history—a harbinger of an altered planet.

Over the past several days, an alarming string of tornadoes has left dozens dead across the South. At least 68 tornadoes were reported in 15 states from California to the Carolinas from Dec. 21 to Monday, the longest streak on record of December days with a tornado. December tornadoes are twice as common during El Niño years, but this weekend’s atmosphere over the South was something different entirely: By some measures, it was the most moisture-laden ever seen during the winter months.

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