Thundersnow – a thunderstorm that produces snow instead of rain – is sometimes reported during winter storms. But how does this weather oddity occur?

The science of snowflakes: See how they form and why no two are ever alike Snow is made up of trillions of tiny ice crystals that make snowflakes, with not one alike. Here's how they form.

How do snow devils form? Similar to a dust devil, a snow devil is created by wind shear - winds blowing in opposite directions near the ground level of the atmosphere.

How does lake effect snow form? The cold air that we have been seeing this January is dragged across the warm waters of Lake Ontario.

How do sleet and freezing rain form? Sleet and freezing rain form because of a "warm-air sandwich" in the atmosphere above our heads (see graphic, below). Precipitation starts as snow in the cold ...

And if enough moisture is present, what kind of winter precipitation will Southeast Texas experience — ice, snow or just rain? Here’s a look at what it would take to get that kind of weather.