Rain is falling out of milder air, but it's landing on very cold ground covered in snow or ice. That temperature difference cools the air right near the surface fast.

Tule fog is choking California’s Central Valley. Here's how it forms and why it's forming less often despite heavy fog this ...

Dense tule fog has blanketed California's Central Valley. We explain how this strange weather phenomenon occurs.

Shelter From the Storm: How does snow form?

When turbulent weather with whipping winds and heavy snow is in the forecast, meteorologists sometimes warn that a storm could “bomb out” or become a bomb cyclone. But what exactly does this mean?