Obviously this isn't the first polar vortex episode of the winter, but it looks to be the most severe." FILE - A person walks along the shore of ice covered Lake Michigan, Feb. 13, 2025, in Chicago.

But in the years between 1998 and 2015, they jumped to an average of 7 days. While weak vortexes became more frequent, strong vortex events dropped from 12 to just 6 days over the same time frame.

A new study challenges the idea that climate change is behind the erratic wintertime behavior of the polar jet stream, the ...

Unless society stops pumping more greenhouse gases in the air, “we can expect multiple factors to worsen summer extremes,” a ...

Extreme heat is only becoming more common. In the United States, heat waves now occur three times as often as they did in the ...

Climate change has tripled the frequency of atmospheric wave events linked to extreme summer weather in the last 75 years and ...

AccuWeather Lead Long Range Forecaster and Senior Meteorologist Paul Pastelok said the average temperature in June is 64.6 ...