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 1.10% 18.40%
1911 0.00% 12.20%
1912 1.10% 21.00%
1913 7.40% 2.00%
1914 1.10% 6.00%
1915 0.00% 78.00%
1916 1.10% 18.40%
1917 1.00% 52.20%
1918 6.00% 2.10%
1919 22.10% 3.90%
1920 1.00% 11.70%
1921 31.80% 0.00%
1922 14.30% 0.00%
1923 11.20% 1.00%
1924 0.00% 67.80%
1925 2.10% 5.10%
1926 5.20% 7.10%
1927 1.10% 32.60%
1928 0.00% 48.00%
1929 3.10% 5.10%
1930 7.10% 0.00%
1931 27.80% 1.00%
1932 16.20% 1.10%
1933 38.00% 1.00%
1934 16.20% 3.00%
1935 3.20% 9.00%
1936 86.00% 0.00%
1937 21.70% 0.00%
1938 7.30% 0.00%
1939 1.10% 6.30%
1940 17.50% 0.00%
1941 31.20% 0.00%
1942 0.00% 9.30%
1943 4.30% 9.90%
1944 0.00% 22.60%
1945 0.00% 23.00%
1946 0.00% 0.00%
1947 1.10% 3.10%
1948 1.00% 1.00%
1949 1.10% 3.10%
1950 0.00% 83.10%
1951 0.00% 53.20%
1952 1.10% 8.80%
1953 1.10% 1.90%
1954 9.80% 2.00%
1955 9.30% 0.00%
1956 1.10% 1.10%
1957 3.10% 0.90%
1958 4.90% 14.10%
1959 1.10% 1.00%
1960 0.00% 0.00%
1961 34.50% 0.00%
1962 0.00% 19.80%
1963 20.10% 2.00%
1964 0.00% 1.00%
1965 1.90% 1.10%
1966 0.00% 4.90%
1967 3.00% 24.20%
1968 0.00% 9.00%
1969 0.00% 9.00%
1970 11.00% 0.00%
1971 1.00% 0.00%
1972 1.00% 0.00%
1973 1.00% 1.00%
1974 1.00% 4.10%
1975 0.00% 3.20%
1976 1.10% 4.30%
1977 8.60% 2.00%
1978 0.00% 13.50%
1979 0.00% 3.20%
1980 5.50% 6.00%
1981 0.00% 1.00%
1982 0.00% 2.90%
1983 37.40% 0.00%
1984 5.80% 0.00%
1985 0.00% 22.60%
1986 3.10% 1.00%
1987 1.10% 2.10%
1988 55.20% 1.00%
1989 4.80% 0.00%
1990 3.90% 0.00%
1991 30.80% 0.00%
1992 1.90% 62.20%
1993 0.00% 50.30%
1994 1.10% 1.10%
1995 10.00% 5.20%
1996 1.00% 1.10%
1997 12.10% 0.00%
1998 11.80% 0.00%
1999 1.10% 0.00%
2000 4.30% 0.00%
2001 24.10% 0.00%
2002 25.60% 0.00%
2003 38.60% 0.00%
2004 5.80% 44.70%
2005 11.60% 2.00%
2006 47.60% 0.00%
2007 72.60% 0.00%
2008 1.00% 6.20%
2009 1.00% 22.50%
2010 21.10% 1.00%
2011 38.80% 2.00%
2012 32.50% 1.00%
2013 31.00% 1.00%
2014 13.80% 2.10%
2015 27.50% 0.00%

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.