News & Features

The Beaufort Sea, the largest Arctic Ocean freshwater reservoir, has increased its freshwater content by 40 percent over the past two decades. How and where this water will flow into the Atlantic Ocean matters in local and global ocean conditions, including the Atlantic Meridional Overturning Circulation.

New maps of ozone air pollution support Global Burden of Disease study. ...

February 2021 was the United States' coldest February in 30 years, but the winter overall was warmer than average. Much of the West remained in some level of drought.

Understanding the Arctic polar vortex. ...

Polar vortex expert Amy Butler and Arctic expert James Overland offer perspectives on the February cold snap in the southern U.S., the polar vortex, and how the Arctic might influence mid-latitude weather.

Today, NOAA and its partners are accelerating the advancement of numerical weather prediction by sharing a second application based on the Unified Forecasting System (UFS) framework with the ... ...

All tornadoes -- whether small or large -- originate from thunderstorms, but not all thunderstorms are the same. Different environments and situations create forecasting challenges. For instance, ... ...

Clouds have both cooling and warming effects on climate, so a climate model's ability to parse cloud effects can reduce uncertainty in future climate projections. A new study distinguishes between climate models with low and high climate sensitivity related to clouds and aerosols.

A warmer-than-average start to spring is favored for the central and eastern United States while a drier-than-average March is likely across the southern tier of the contiguous U.S.

A new study in Nature Climate Change finds regional variations in snowpack melt as temperatures rise. The researchers conclude that, in the United States, snowpack in coastal regions and the south is most “at-risk” from climate change while snowpack in the northern interior of the country is less vulnerable.