Average temperatures across the contiguous United States in February ranged from frigid to balmy.
While heat is stored and mixed throughout the depth of the ocean, it is the temperature at the surface—where the ocean is in direct contact with the atmosphere—that plays a significant role in weather and short-term climate.
In July 2013, the Pacific Northwest was relatively dry, while the Southeast got a soaking.
The Southwest received a double-whammy welcome to summer in June: the region was both much hotter and much drier than usual.
Summer thunderstorms are likely to improve drought conditions in the Southwest, but drought will likely persist across much of the West.
Rain and snow across the contiguous United States during April 2013.
Data from 2010 indicate that mountain glaciers predominantly lost mass, and preliminary data from 2011 indicate a continuation of the same long-term trend.
What began as an ordinary Sunday on August 21, 2011, became anything but ordinary for residents of Goderich, Ontario, as an EF-3 tornado (winds between 136-165 mph) ripped through their historic town.
As of 2010, the warming ;effect of long-lived reenhouse gases in Earth's atmosphere has increased by more than 30% since 1990.