Visualizing the Few April Heat Records Set in the 20th Century

NOAA’s Environmental Visualization Laboratory (EVL) used NCDC’s data to show that after a decade of warmer than average Aprils in the United States, few highest monthly maximum temperature records for April remain from the 20th century. The image EVL created plots the decade in which the highest average April temperature record was set for different regions of the country, starting in 1911 (i.e., 1911–1920) and running through 2010, using data from NCDC’s U.S. Records archive. The records broken in 2011 and 2012 are shown separately. Most of the pixel colors are associated with the 2001–2010, 2011, and 2012 periods. Gray indicates no data (records) are associated with that area of the country.

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Read the full April 2012 U.S. Monthly Climate Report at: