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What is the UV Index (and Why Should I Care About It)?
Weather forecasts include it for good reason.
WEATHER
Watch Thousands of Tons of Mud Surge Down a Swiss Mountain
Switzerland’s Illhorn Mountain is home to the annual deluge, as layers of snow and icy dirt thaw and flow down to the ground below.
8 Facts About the Biggest Tornadoes on Earth
Most tornadoes are small and last just a few minutes. Those aren't the ones we're talking about.
Why Is the Southeast So Humid?
You can take the heat. But the humidity's a whole different story.
What Is the Dew Point, and How Does It Relate to Humidity?
When it comes to your weather forecast, just dew it.
Recent Hailstorm Is Colorado’s Most Expensive Catastrophe Ever
It cost insurers in the state $1.4 billion in claims.
The Hottest Temperatures on Record in Every Country
Maybe summer is not the best time to take a trip to some of these places.
Why Is the Pacific Northwest So Rainy?
The breathtaking terrain is partially to blame.
Tornado Casualties Could Triple by the End of the Century
As the American population grows and people build homes farther away from urban centers, tornadoes will have more things to run into.
Does the Thunderstorm "Bubble" Really Exist?
Why do storms seem to consistently hit certain areas, while often skipping nearby towns?
Most of the U.S. Is Experiencing Record-Low Drought Levels
But in a few places, we've gone from not enough water to too much.
6 Things to Know Now That Hurricane Season Has Started
Some important things to keep in mind.
Interactive Maps Show How Climate Change Will Impact Your Neighborhood
The effects will be felt across the country.
How a Pinwheeling Weather System Brought Floods and Tornadoes to the Heartland
It also caused a historic blizzard in Kansas.
Watch David Lynch's (Mostly Straightforward) Weather Reports
In the 2000s, he posted near-daily videos of himself describing the weather in L.A.
Yosemite Falls Has Been Revived By the Drought-Ending Winter
The falls are the fullest they've been in years.
4 Reliable Ways to Get Severe Weather Warnings—and 1 Unreliable One
Tornado season ramps up this month. Seconds count when your life is on the line.
Cyclone Debbie Made Landfall in Australia
It's the most intense storm to strike the country in several years.
Storms Head Across the U.S. This Week
Look out for severe thunderstorms and some beneficial heavy rainfall.
Meet Asperitas, the Trendiest Addition to the Cloud Atlas
After years of lobbying by cloud-spotters, the World Meteorological Organization has granted asperitas a spot in the official cloud canon.
How Were Roads Cleared Before Snowplows?
We've come a long way since the days of snow shoes.
A Massive Snowstorm Is Heading to the Northeast
Stock up on bread, milk, batteries, and wine.