Unhealthy air quality grips the East Coast reaching as far south as North and South Carolina.

The Sierra Nevada region where the park is located experienced snowfall at over 300% than usual this past winter. Flooding may happen into May and June, the park said.

Red flag warnings mean an increased risk of wildfires in the next 12 to 24 hours, so fire safety is extra important. How do they differ from fire weather watches? And what precautions should you take?

The area received between 14 and 20 inches of rain Wednesday, and a few more inches are possible, according to the National Weather Service.

Storms have been sweeping across California since last December. Areas with high elevation are forecasted to experience the brunt of this week's extreme weather.

Western Mississippi is turning to recovery after being hit by a long-track tornado on Friday. Here's what made it so destructive — and why the impact of climate change on tornadoes is still unclear.

The strongest tornado to impact the Los Angeles metro area in 40 years touched down at 11:14 a.m. for two to three minutes, according to the National Weather Service.

Another atmospheric river set to arrive Monday could worsen already severe flooding, as the extra rain and snowmelt threaten to overflow rivers and streams at lower elevations.

Large swaths of the U.S. have faced an intense winter storm over the past several days. Hundreds of thousands were without power and weather advisories were issued across the country.

Tornadoes ripped through Alabama and Georgia on Jan.12, 2023, killing nine people. The National Weather Service has identified the rare and damaging system as "mesocyclonic." Could more storms like these occur?

The winter storm will bring "a large swath of heavy snow from the West Coast to the Northeast" this week, the National Weather Service says.

The term forecasters are using to describe the overall weather pattern is "anomalous" — for its unusual cold and warmth. In California, it could be the coldest storm in years.

The U.S. military started tracking more airborne objects it calls "low speed clutter" after shooting down the Chinese balloon. The National Weather Service says it launches about 184 balloons a day.

California braced for more stormy weather as rain began to sweep into the northern part the state and the San Francisco Bay area, raising the potential for road flooding, rising rivers and mudslides.

Regions across the U.S. are expected to get record low temperatures, wind chills and heavy snow, which could make for dangerous conditions for travel and simply being outside.