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

NCDC 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 0.40% 7.00%
1911 24.10% 5.10%
1912 1.40% 46.50%
1913 4.40% 24.20%
1914 3.70% 2.90%
1915 0.80% 0.40%
1916 5.50% 16.40%
1917 0.30% 26.60%
1918 0.00% 34.90%
1919 1.80% 7.70%
1920 5.80% 7.70%
1921 25.80% 0.50%
1922 3.80% 30.00%
1923 2.60% 3.40%
1924 0.20% 2.80%
1925 7.00% 2.00%
1926 10.50% 0.20%
1927 22.20% 0.00%
1928 0.80% 0.00%
1929 0.20% 57.20%
1930 0.30% 6.40%
1931 31.80% 0.00%
1932 40.20% 6.00%
1933 9.10% 22.30%
1934 22.20% 4.70%
1935 3.30% 0.10%
1936 0.80% 52.00%
1937 17.50% 50.80%
1938 13.50% 0.00%
1939 0.50% 6.00%
1940 9.30% 30.40%
1941 16.30% 0.80%
1942 0.10% 8.50%
1943 0.40% 0.50%
1944 5.30% 0.50%
1945 1.70% 0.00%
1946 1.70% 4.80%
1947 0.00% 2.10%
1948 0.20% 6.30%
1949 22.40% 42.30%
1950 25.50% 14.60%
1951 0.10% 1.00%
1952 24.10% 2.70%
1953 27.60% 0.20%
1954 11.00% 0.00%
1955 0.00% 18.30%
1956 0.90% 0.20%
1957 23.40% 7.30%
1958 12.70% 12.80%
1959 0.60% 0.90%
1960 0.70% 5.80%
1961 7.60% 0.70%
1962 0.00% 1.40%
1963 0.00% 44.10%
1964 0.90% 17.00%
1965 0.60% 0.60%
1966 0.00% 16.30%
1967 4.60% 0.80%
1968 0.50% 15.40%
1969 1.70% 5.20%
1970 6.60% 13.30%
1971 0.40% 1.20%
1972 0.20% 2.70%
1973 0.10% 3.00%
1974 9.50% 3.10%
1975 3.20% 0.40%
1976 1.00% 0.30%
1977 0.00% 30.50%
1978 16.70% 51.70%
1979 0.00% 60.60%
1980 15.20% 0.20%
1981 11.10% 4.50%
1982 0.00% 15.50%
1983 40.10% 0.00%
1984 9.70% 4.30%
1985 0.00% 21.90%
1986 24.30% 0.00%
1987 21.70% 0.20%
1988 0.20% 3.20%
1989 0.30% 8.60%
1990 46.20% 0.90%
1991 1.80% 0.00%
1992 43.60% 0.40%
1993 5.70% 6.40%
1994 0.40% 13.70%
1995 28.80% 0.00%
1996 7.50% 0.40%
1997 1.10% 0.00%
1998 64.80% 0.00%
1999 36.90% 0.00%
2000 37.00% 0.00%
2001 0.40% 0.00%
2002 23.20% 0.60%
2003 15.20% 0.10%
2004 0.20% 0.10%
2005 40.10% 0.00%
2006 34.70% 0.00%
2007 0.00% 1.50%
2008 0.70% 0.20%
2009 2.50% 0.20%
2010 16.10% 7.10%
2011 0.10% 9.60%
2012 32.40% 0.00%
2013 2.40% 7.60%
2014 4.90% 21.80%
2015 25.10% 13.50%

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.