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 27.50% 0.90%
1911 5.30% 8.60%
1912 2.50% 24.70%
1913 0.30% 13.80%
1914 5.40% 3.40%
1915 9.10% 9.30%
1916 0.60% 6.10%
1917 0.00% 65.50%
1918 6.10% 6.20%
1919 2.70% 1.40%
1920 0.00% 28.00%
1921 26.20% 1.40%
1922 11.10% 20.60%
1923 0.20% 34.40%
1924 0.00% 41.60%
1925 16.40% 0.50%
1926 13.30% 34.50%
1927 13.20% 3.20%
1928 5.10% 9.30%
1929 11.70% 6.70%
1930 1.50% 0.50%
1931 3.00% 28.50%
1932 1.00% 12.30%
1933 1.00% 14.40%
1934 33.80% 3.40%
1935 9.80% 10.60%
1936 3.40% 0.10%
1937 0.60% 2.30%
1938 20.30% 0.40%
1939 2.50% 1.40%
1940 15.20% 17.60%
1941 9.60% 4.90%
1942 5.80% 8.80%
1943 1.80% 21.30%
1944 0.00% 7.50%
1945 11.40% 8.00%
1946 29.20% 0.40%
1947 6.00% 24.30%
1948 6.70% 9.60%
1949 1.50% 0.20%
1950 0.00% 36.10%
1951 0.00% 24.40%
1952 0.00% 7.40%
1953 5.70% 8.00%
1954 0.60% 9.60%
1955 12.80% 25.10%
1956 0.00% 10.30%
1957 5.30% 0.20%
1958 0.60% 1.90%
1959 0.30% 1.50%
1960 0.00% 36.80%
1961 0.60% 1.50%
1962 0.10% 1.20%
1963 12.50% 0.90%
1964 0.00% 19.10%
1965 0.20% 17.30%
1966 0.50% 0.80%
1967 7.50% 11.90%
1968 0.00% 4.10%
1969 0.00% 11.90%
1970 0.00% 15.00%
1971 0.00% 36.60%
1972 1.70% 2.20%
1973 10.30% 4.50%
1974 15.40% 0.60%
1975 0.00% 24.40%
1976 0.00% 4.80%
1977 35.60% 7.20%
1978 5.80% 0.50%
1979 2.20% 1.90%
1980 0.90% 8.50%
1981 13.00% 0.80%
1982 0.20% 3.70%
1983 2.20% 17.90%
1984 0.40% 7.80%
1985 37.20% 0.00%
1986 33.30% 1.00%
1987 35.40% 3.40%
1988 2.00% 7.50%
1989 18.00% 0.40%
1990 8.30% 0.00%
1991 54.40% 3.40%
1992 34.40% 2.50%
1993 15.30% 7.40%
1994 16.70% 0.30%
1995 3.00% 0.80%
1996 2.10% 17.90%
1997 10.40% 11.80%
1998 22.70% 2.80%
1999 7.00% 2.40%
2000 34.80% 0.00%
2001 13.20% 0.00%
2002 2.30% 14.60%
2003 14.00% 0.40%
2004 57.60% 0.00%
2005 6.80% 3.50%
2006 29.80% 0.00%
2007 34.30% 0.30%
2008 0.00% 7.60%
2009 3.30% 1.00%
2010 30.00% 4.40%
2011 9.10% 1.30%
2012 70.00% 0.20%
2013 6.00% 18.90%
2014 9.20% 12.10%
2015 17.10% 0.60%

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.