How could a tornado outbreak kill more than 200 people? Several factors—meteorological, geographical, and sociological—came together in a rare and deadly way.

A new study looks at how the anticipated recovery of the ozone hole over Antarctica and simultaneous increase in greenhouse gas concentrations will combine to affect weather and climate in the Southern Hemisphere.

FIP-Severity provides 12-hour icing forecasts to pilots and forecasters on the likelihood of encountering dangerous in-flight icing conditions.

Alaska is among the fastest-warming places on Earth, with its interior region warming the most statewide. A study by NCAR’s Shannon McNeeley looks at the vulnerability to climate change of native rural communities.

An international team of astronomers that includes NCAR’s Savita Mathur has observed mixed waves—a mixture of acoustic and gravity waves—that run all the way to the cores of red giant stars. Astronomers already knew that such waves (known as stellar oscillations) existed, but until now had only observed pure acoustic waves traveling through the outer parts of stars.