The slowdown may make it more difficult for the US to meet goal of reduced ozone pollution.

Federal investments in atmospheric and oceanic research are ushering in major advances in longer-term weather prediction, enabling private companies to provide their clients with valuable forecasts of weather patterns weeks to months in advance.

People's past experiences with tornadoes inform how they approach this type of extreme weather in the future, including their perception of the risk.

The new UCAR senior vice president and COO will ensure that the organization continues to deliver the highest quality and most cost-effective services.

The agreement stipulates that warming be limited to between 1.5 degrees C (2.7 degrees Fahrenheit) and 2 degrees C (3.6 degrees F). It also stipulates that countries achieve net-zero greenhouse gas emissions in the second half of this century.