U.S. Climate Extremes Index (CEI): Graph

NCEI added Alaska climate divisions to its nClimDiv dataset on Friday, March 6, 2015, coincident with the release of the February 2015 monthly monitoring report. For more information on this data, please visit the Alaska Climate Divisions FAQ.

Graph

Choose a period/season and an indicator from the options below and click "Plot" to create a time series graph. Note that the sixth indicator (Step 6) is not calculated for the spring (March-May), winter (December-February) and cold (October-March) seasons since most months during these periods are outside of the traditional hurricane season.

Move mouse towards an axis until highlighted. Left-click mouse to pan. Shift key + left-click to zoom.

Download: xml csv json
Year Warm Cold
1910 14.60% 3.70%
1911 10.70% 17.40%
1912 0.00% 53.60%
1913 6.00% 23.80%
1914 0.60% 6.50%
1915 0.50% 22.90%
1916 1.40% 27.30%
1917 1.30% 37.00%
1918 0.90% 4.90%
1919 0.60% 19.90%
1920 0.30% 30.70%
1921 45.30% 0.50%
1922 4.50% 12.50%
1923 0.00% 17.40%
1924 0.80% 29.40%
1925 12.70% 1.40%
1926 10.30% 16.10%
1927 9.90% 10.80%
1928 1.00% 1.60%
1929 0.80% 25.20%
1930 4.40% 5.10%
1931 37.80% 2.10%
1932 2.40% 7.70%
1933 33.10% 1.80%
1934 61.60% 0.40%
1935 0.60% 3.70%
1936 6.70% 1.60%
1937 0.60% 2.00%
1938 25.50% 2.20%
1939 40.50% 0.00%
1940 7.50% 21.00%
1941 3.20% 13.40%
1942 0.10% 1.40%
1943 4.30% 2.80%
1944 0.00% 7.80%
1945 0.90% 2.10%
1946 21.40% 0.40%
1947 0.10% 0.60%
1948 0.90% 10.50%
1949 9.30% 2.40%
1950 7.80% 19.50%
1951 2.30% 27.10%
1952 3.80% 2.30%
1953 30.70% 0.20%
1954 40.40% 2.00%
1955 0.60% 12.80%
1956 14.50% 0.70%
1957 0.30% 8.10%
1958 9.80% 30.50%
1959 5.30% 1.50%
1960 0.20% 15.20%
1961 0.40% 6.50%
1962 0.00% 2.30%
1963 6.10% 4.20%
1964 0.60% 10.60%
1965 0.00% 9.60%
1966 0.60% 11.10%
1967 2.00% 1.30%
1968 0.00% 15.60%
1969 0.00% 16.30%
1970 0.40% 0.90%
1971 0.00% 6.40%
1972 0.00% 20.40%
1973 0.10% 6.10%
1974 1.00% 0.30%
1975 0.30% 16.50%
1976 3.10% 9.50%
1977 2.40% 0.20%
1978 0.00% 27.10%
1979 0.00% 40.10%
1980 0.90% 2.40%
1981 16.70% 0.90%
1982 0.00% 25.10%
1983 0.00% 25.50%
1984 0.50% 11.90%
1985 0.00% 17.70%
1986 3.50% 0.20%
1987 28.60% 1.90%
1988 16.40% 0.50%
1989 6.10% 10.90%
1990 23.40% 0.00%
1991 9.30% 1.60%
1992 14.00% 8.40%
1993 0.00% 36.90%
1994 10.10% 0.00%
1995 2.40% 0.20%
1996 9.40% 24.00%
1997 3.10% 9.20%
1998 33.00% 5.40%
1999 46.40% 0.00%
2000 15.80% 0.00%
2001 21.80% 0.10%
2002 13.60% 0.20%
2003 26.10% 1.10%
2004 3.90% 0.00%
2005 8.70% 0.20%
2006 49.30% 0.30%
2007 31.90% 0.70%
2008 5.00% 3.40%
2009 4.10% 2.90%
2010 6.50% 1.70%
2011 21.90% 1.40%
2012 83.10% 0.00%
2013 4.90% 8.00%
2014 24.30% 19.50%
2015 38.30% 0.40%

Limitations: Statistics for the most recent period/season are computed from a fraction of the U.S. which has data available at that time. Extreme percentage values can and will likely change as final quality controlled data become available and fill in the data gaps.