If the climate conditions that indicate ENSO are best measured as seasonal averages, will scientists wait for conditions to persist three months before declaring El Niño underway?

WMO Statement on the Status of the Global Climate in 2013 Report Cover

WMO Releases Annual Status of the Global Climate Report

The dramatic impact of climate variability and climate change continued to be felt all over the world throughout 2013.The World Meteorological Organization statement on the status of the global climate in 2013 provides a snapshot of global and regional trends in weather and climate over the past year and highlights some of the year’s most significant extreme events.

NAS booklet cover picture

Climate Change: Evidence & Causes

A team of climate scientists from The National Academy of Sciences and The Royal Society have produced a new report for decision makers, policy makers, educators, and other individuals seeking authoritative information on climate science.

This video describes the impact of extreme heat on Philadelphia in the summer of 2011 and how the city is adapting to new expectations about its weather. It uses this example to introduce the new national climate normals, released by NOAA's National Climatic Data Center (NCDC) that summer.

In this video, a spokesperson for the National Climactic Data Center describes the methods of using satellites (originally designed for observing changes in the weather) to study changes in climate from decade to decade. The video clearly illustrates the value of satellite data and begins to address connections between weather and climate.

What is an extreme event? NOAA scientists explore how single events or trends in extreme weather relate to climate change.

U.S. Climate Normals

Discover easy access to 30-year Climate Normals for temperature and precipitation from stations across the country. This tool generates graphs for montlhy temperature and precipitation Climate Normals, and provides tabular data for hourly, daily, monthly, seasonal, and annual periods.

Southwest Climate Change Network

The Southwest Climate Change Network is a virtual community for scientists, other experts, decision makers, and the public to share information on climate change and collaborate on solutions. The site provides static and dynamic content and encourages readers to engage with each other and the scientists behind the site and ask questions about what matters to them when it comes to climate in the Southwest.

Alaska Climate Dispatch

The Alaska Center for Climate Assessment and Policy produces this climate information tool in partnership with the Alaska Climate Research Center, SEARCH Sea Ice Outlook, National Centers for Environmental Prediction, and the National Weather Service. The quarterly Alaska Climate Dispatch provides seasonal weather and climate summaries as well as Alaska weather, wildfire, and sea ice outlooks in one easily accessible document with the latest issue and archives available online.

This year's theme for the annual forum held in Washington, DC is “the value and sustainability of the weather, water and climate enterprise.” Recent research indicates that the annual economic impact of weather events is as much as $485 billion in the United States.

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