A Penn State led-effort to understand greenhouse sources and sinks finds that twice as much methane is seeping into the atmosphere than the Environmental Protection Agency estimates.

Congratulations Kelly.

Snowfall trends in Washington, and other East Coast cities, are leading scientists to this conclusion: Global warming, may paradoxically be contributing to an uptick in big East Coast snowstorms.

Every minute counts when it comes to predicting severe weather.

For the first time, meteorologists have observed persistent drizzle under conditions where snow would be expected.