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Winter and Spring Heatwave in North America

North America Swelters in March Heat
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North America Swelters in March Heat

Temperatures were well above the norm for the month, setting records and rising well above the long-term trends.

Published Apr 17, 2012

Image of the Day Heat Temperature Extremes

Snow Deficit
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Snow Deficit

What a difference one year has made in the snow cover over North America.

Published Mar 30, 2012

Image of the Day Snow and Ice World of Change Temperature Extremes

Historic Heat in North America Turns Winter to Summer
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Historic Heat in North America Turns Winter to Summer

Unseasonably warm temperatures broke records across the United States.

Published Mar 21, 2012

Image of the Day Heat Land Temperature Extremes

Diagnosing the Snow Deficit of December
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Diagnosing the Snow Deficit of December

The Arctic Oscillation, La Niña, and North Atlantic Oscillation combine to steer winter's cold, snowy weather away from the United States.

Published Feb 8, 2012

Image of the Day Land Snow and Ice Temperature Extremes

2011 Global Temperatures
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2011 Global Temperatures

Analysis of global temperatures shows that the year was the 9th hottest in the past 130 years. Nine of the ten warmest years have occurred since 2000.

Published Jan 20, 2012

Image of the Day Heat Temperature Extremes