Damage from a deadly twister hints that some valleys may act like real "tornado alleys."

Tornadoes are popping up across Kansas, Nebraska and other plains states.

Air quality has been affected nationwide.

New volcanic ash monitoring techniques will aide air traffic safety.

Satellite will extend important climate records and aid in weather forecasting.

Data shedding light on auroras, how solar wind and Earth's magnetic field interact.

Storms have dropped several inches on race route.

The Earth passed its perihelion point of its orbit late on Jan. 4.

Thunderstorms captured on video near Washington, D.C.

Gigantic jets shoot from clouds to upper atmosphere.

Record highs are rapidly melting the snowpack.

Will the hot weather stick?

Rains are light to moderate except in certain regions.

Both are visible in the same satellite view.

The quintuple rocket launch will put on a brief light show for observers along the U.S. East Coast.

Could help understand makeup of atmosphere & Earth's weather.

The fog forms when warm air blows over a cooler surface.

Strange clouds patterns seen by satellite.

On-again, off-again pattern is petering out.

Enabler of recent wild weather may be gone by spring.

The tilt of the Earth during its yearly orbit creates the seasons, equinoxes and solstices.

But drought now more widespread.