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 2.90% 22.00%
1911 3.20% 9.80%
1912 0.80% 27.80%
1913 4.30% 10.00%
1914 7.90% 5.20%
1915 0.70% 52.30%
1916 1.10% 18.90%
1917 1.90% 40.50%
1918 6.60% 6.80%
1919 7.10% 12.20%
1920 0.60% 25.90%
1921 22.20% 2.70%
1922 7.10% 0.90%
1923 3.30% 12.10%
1924 2.10% 34.70%
1925 4.00% 2.80%
1926 3.30% 12.20%
1927 0.90% 39.10%
1928 0.70% 19.10%
1929 1.10% 22.30%
1930 3.10% 13.20%
1931 12.80% 4.00%
1932 7.40% 3.00%
1933 11.50% 3.20%
1934 33.90% 1.60%
1935 3.20% 4.00%
1936 34.50% 0.80%
1937 12.80% 0.20%
1938 3.60% 1.60%
1939 2.00% 4.00%
1940 5.10% 7.20%
1941 9.80% 8.60%
1942 2.30% 6.00%
1943 22.20% 12.50%
1944 0.50% 19.10%
1945 0.50% 20.40%
1946 0.40% 13.80%
1947 1.40% 9.30%
1948 0.50% 6.20%
1949 15.00% 6.30%
1950 0.00% 46.60%
1951 2.50% 15.20%
1952 13.80% 3.20%
1953 4.40% 4.70%
1954 17.50% 8.70%
1955 10.00% 9.90%
1956 1.30% 4.50%
1957 0.80% 3.10%
1958 11.30% 8.90%
1959 6.30% 1.30%
1960 1.40% 1.80%
1961 18.10% 19.30%
1962 0.40% 16.00%
1963 7.70% 14.90%
1964 0.20% 3.50%
1965 0.30% 15.10%
1966 0.30% 10.80%
1967 5.00% 29.40%
1968 0.40% 7.10%
1969 1.10% 2.30%
1970 3.90% 1.90%
1971 1.80% 2.50%
1972 1.20% 14.50%
1973 8.90% 8.10%
1974 0.40% 17.60%
1975 1.30% 8.90%
1976 0.40% 33.40%
1977 12.30% 0.50%
1978 1.60% 4.90%
1979 0.30% 9.00%
1980 17.30% 4.10%
1981 10.00% 0.50%
1982 0.50% 8.00%
1983 19.40% 2.90%
1984 5.00% 3.90%
1985 1.40% 12.40%
1986 5.30% 0.60%
1987 12.00% 3.20%
1988 19.50% 1.60%
1989 3.80% 4.20%
1990 8.30% 0.40%
1991 14.70% 1.60%
1992 6.90% 38.80%
1993 12.20% 16.00%
1994 11.60% 0.60%
1995 22.00% 3.50%
1996 8.90% 0.30%
1997 4.90% 2.80%
1998 28.90% 0.20%
1999 11.30% 0.80%
2000 9.40% 0.80%
2001 13.20% 0.50%
2002 33.30% 0.00%
2003 28.90% 0.00%
2004 10.40% 21.10%
2005 31.00% 1.00%
2006 40.80% 0.00%
2007 34.10% 0.20%
2008 8.00% 1.90%
2009 9.20% 6.70%
2010 57.20% 0.80%
2011 59.80% 0.60%
2012 30.50% 0.40%
2013 37.00% 0.40%
2014 19.70% 1.00%
2015 42.70% 0.10%

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.