A record-setting wind chill of 108 degrees below zero was seen on the summit of Mount Washington in New Hampshire, the National Weather Service said.

Ottawa is experiencing its coldest Feb. 4 in 100 years but the temperature is expected to rise steadily Saturday and into Sunday.

Coronal holes are cooler, darker regions in the sun's upper atmosphere, the corona, from which solar wind streams into space at high speed. A new study has now found that the magnetic properties of these holes can be used to forecast the severity of geomagnetic storms that hit Earth.

More than half the deaths occurred in western New York, which struggled with super-size snow drifts that snarled emergency vehicles. Buffalo's responders rescued hundreds trapped in cars.

A deadly blizzard pummeled Buffalo, New York, on Christmas Day, trapping people in their cars, causing power outages and raising the death toll from a severe winter storm system that swept the United States. Twenty-eight people have died so far in weather-related incidents, according to an NBC News tally. CNN reported 26 deaths Sunday morning.

Whalers from the 18th and 19th centuries are helping 21st Century scientists on climate change.

A lake-effect snow warning is in effect through 1 a.m. Saturday for southern Erie County.

Tropical Storm Nicole has sent multiple homes collapsing into the Atlantic Ocean.

Climate change added at least 10% more rain to Hurricane Ian, a study prepared immediately after the storm shows. Thursday’s research, which is not peer-reviewed, compared peak rainfall rates during the real storm to about 20 different computer scenarios of a model with Hurricane Ian’s characteristics slamming into the Sunshine State in a world with no human-caused climate change.

Hurricane Fiona struck Puerto Rico's southwest coast on Sunday after causing an island-wide power blackout and threatening to dump “historic” levels of rain.

Nearly 1,000 records have been set over the past week from California to North Dakota, many by large margins.

Precipitation extremes are now more feast or famine because of climate change.

Authorities across southern Europe battled on Sunday to control huge wildfires in countries including Spain, Greece and France, where thousands of people have been evacuated in soaring temperatures.

As storms moved across the country Tuesday, people in Sioux Falls, South Dakota witnessed a rare sight – a green-tinged sky.

Temperatures tied or broke records in 27 cities on Saturday, peaking at 122 in Death Valley, Calif. The heatwave will move north and eastward this week, stopping at the Appalachian Mountains.

The Northeast, from Delaware to Maine, has the highest likelihood of being extra-hot, along with parts of the West.

Using a chaos theory idea connected to the flapping of a butterfly's wings, a team of researchers lead by the RIKEN institute in Japan has identified an experimental approach to regulate the weather itself.

For the fourth week in a row, the continental United States will experience a multi-day severe weather outbreak.

On mountain peaks scattered across Colorado, machines are set up to fire chemicals into the clouds in attempts to generate snow. The process is called cloud seeding, and as global temperatures rise, more countries and drought-troubled states are using it in sometimes desperate efforts to modify the weather.

You might think that clouds are clouds all over Earth, but that's not quite so.