Understanding Climate

U. S. climate summary for May 2021

June 9, 2021

May 2021 was mild across much of the contiguous U.S., with dry conditions widespread across the West, the Northern Plains, the Ohio Valley, and the Mid-Atlantic.

June 2021 U. S. climate outlook: Wetter- and cooler-than-average start to summer for the Southeast and Gulf Coast

Tom Di Liberto | June 1, 2021

The highest chances for much warmer than average conditions are in the Great Basin and the Mid-Atlantic/Northeast.

Climate.gov tweet chat: Talk El Niño and La Niña with the ENSO bloggers

Tom Di Liberto | June 1, 2021

On June 3, 2021, our ENSO Bloggers did a Tweet Chat to talk all things El Niño and La Niña. Here's the transcript.

May 2021 outlook: Warmth favored for southern half of contiguous U. S., wetter conditions for the East

Tom Di Liberto | May 3, 2021

The May 2021 outlook favors warmth for the southern half of the country and a wet East-dry West split.

Climate change and the 1991-2020 U. S. Climate Normals

Rebecca Lindsey | April 19, 2021

Every ten years, NOAA releases an analysis of U.S. weather of the past three decades, calculating average values for temperature, rainfall, and other climate conditions that have come to represent the new “normals” of our changing climate.

First month of Northern Hemisphere spring 2021 was warmer than average across the globe

Rebecca Lindsey | April 14, 2021

Although this was the smallest warm departure for any March since 2014, it was still the eighth-warmest March for the planet in the 142-year record.

March 2021 was warmer than average for much of the contiguous U. S., with a wet bull's-eye in the heart of the country

Rebecca Lindsey | April 9, 2021

A wetter-than-average March moderated drought in parts of the Central Plains, but severe to exceptional drought remained widespread in the West.

Climate change is probably increasing the intensity of tropical cyclones

, Maya V. Chung, Gabe Vecchi, Jingru Sun, Jingru Sun, Jingru Sun | March 31, 2021

A panel of hurricane experts reviewed more than 90 research studies on the observed and projected changes in tropical cyclones for an updated summary of what the science says about the human influence on these devastating storms.

U. S. has cold February, but warm winter

Rebecca Lindsey | March 9, 2021

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

Rebecca Lindsey | March 5, 2021

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.

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Understanding Climate