Monday, December 10, 2012

January-November, 2012 U.S. Climate Update

January 1 through November 30, 2012 is the driest on record for the state of Nebraska (118 years of data).  And, for the same time period, it was the warmest on Record for the state of Nebraska.

Colorado and Wyoming join Nebraska in also having their driest year on record through November 30.  And, 17 states also join Nebraska for having their warmest year on record though November 30.

Note that none of the conterminous 48 states are averaging below normal temperature for the year to date as of November 30, 2012.  Three states are having a near normal year in temperatures and the remaining 45 states are all experiencing a warmer than normal year for temperatures to date as of November 30. 

Note the summary below the two maps.

  • Climate Highlights — Year-to-Date (January-November)
  • The January-November period was the warmest first 11 months of any year on record for the contiguous United States. The national temperature of 57.1°F was 3.3°F above the 20th century average, and 1.0°F above the previous record warm January-November of 1934. During the 11-month period, 18 states were record warm and an additional 24 states were top ten warm.
  • It appears virtually certain that 2012 will surpass the current record (1998, 54.3°F) as the warmest year for the nation. December 2012 temperatures would need to be more than 1.0°F colder than the coldest December (1983) for 2012 to not break the record.
  • January-November 2012 was the 12th driest such period on record for the contiguous U.S., with a precipitation total 3.08 inches below the long-term average of 26.91 inches.
  • Drier-than-average conditions stretched across the central part of the country, from the Rocky Mountains to the East Coast. Colorado, Nebraska, and Wyoming each had their driest year-to-date on record and eight additional states had 11-month precipitation totals among their ten driest.
  • Wetter-than-average conditions were present for the Pacific Northwest, the central Gulf Coast, and New England. Washington State experienced its ninth wettest year-to-date.

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