HARLINGEN, Texas (ValleyCentral) — How does hail form? NBC Meteorologist Marcelo Rivera Gonzalez explains what needs to happen for it to materialize. To understand how hail develops, Gonzalez points ...

Why Lightning Happens — And Why It’s So Dangerous. Meteorologist Matt Bullock explains.

The primary hazards are large to very large hail, damaging wind gusts, and an isolated tornado from thunderstorms, forecasters said.

Severe weather will follow what is expected to be a near-record warm day in Kansas City. Here’s what you need to know about the storms.

WASHINGTON — A super El Niño could form later this year, and it could have impacts around the globe, including here in the DMV. El Niño means "the little boy," and it marks warmer-than-usual ...

Editor's Note: The severe weather threat for parts of the Chicago area Tuesday has been upgraded. Our latest weather story can be found here and on our NBC Chicago app. The entire Chicago area is ...

A mild and messy day is coming on Wednesday. Expect heavy rain and storms. Even isolated severe weather is possible south.

Meteorologists have increased the max intensity of possible tornados in central Illinois on Tuesday to an EF3 strength.

"All severe hazards are possible, including the risk for a few strong to intense tornadoes and very large hail," the Storm Prediction Center said.

Still nice outside, but a little cooler this Tuesday afternoon ...

Tuesday is an Alert Day due to the possibility of severe weather. As another system moves in, a chance for strong to severe ...

How much daylight do we gain in March? Up Next. How do UK weather warnings work? Video, 00:01:47How do UK weather warnings work? Expecting rain, sleet or snow? Video, 00:00:47Expecting rain, sleet or ...