Not all droughts and excess rainfall years can be explained away by El Niño and La Niña.
From long johns to short sleeves: US polar vortex likely to end with rapid thaw; melting snow may lead to flooding in Michigan
The polar vortex that brought many cities to a standstill was expected to end with a rapid thaw that experts say could be unprecedented. But the sudden swing from long johns to light jackets and short sleeves could create problems of its own.
The Arctic cold has caused at least 12 deaths since Saturday across the Midwest. Some died in weather-related traffic accidents, others from apparent exposure to the elements.
Polar vortex freezes US Midwest; schools, postal services shut down as authorities struggle to provide shelter to homeless
Winter's sharpest bite in years moved past painful into life-threatening territory, prompting officials throughout the Midwest in the US to take extraordinary measures to protect the homeless as the chill of the polar vortex froze a huge chunk of the region.
Mercury plunges to 'life-threatening temperatures' in US midwest; Chicago makes special arrangements for homeless
A brutal cold wave hit the American Midwest on Wednesday, bringing temperatures lower than those in Antarctica, grounding flights, closing schools and businesses — and raising fears of hypothermia.
Polar Vortex Explained: Artic-like deep freeze grips US with coldest temperature in 20 years, but is this climate change?
Occasionally we get meandering of the polar vortex and that is what is happening right now. And if you get a real big one you can have a big blob of cold air penetrate very far south.
Polar vortex makes US cities colder than South Pole; 22 states record sub zero temperatures, whiteout conditions
At least 22 states recorded sub-zero temperatures Wednesday and 139 million people in the U.S. who were under a wind chill advisory or wind chill warning as of midday Wednesday, according to information from the National Weather Service.
Some experts see link between man-made climate change & atmospheric changes causing extreme weather.
Residents of the New York state city of Buffalo started digging out on Wednesday from a massive snowstorm blamed for seven deaths, even as another headed their way, threatening to break snowfall records.
Check out these stunning photos a partially frozen Niagara Falls that was lit up with bright lights. The frigid air and "polar vortex" that affected about 240 million people in the United States and southern Canada have left the Falls frozen.
The record-breaking chill across the U.S. and Canada was so frigid it literally stopped Niagara Falls in its tracks