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 3.60% 3.70%
1911 18.60% 5.90%
1912 0.90% 51.50%
1913 2.10% 27.80%
1914 4.90% 4.00%
1915 1.00% 4.70%
1916 2.00% 18.40%
1917 0.20% 63.70%
1918 1.90% 15.60%
1919 3.30% 6.10%
1920 0.20% 21.90%
1921 44.10% 1.00%
1922 9.60% 24.60%
1923 1.10% 11.90%
1924 0.00% 42.90%
1925 16.40% 0.00%
1926 10.50% 15.70%
1927 18.50% 0.80%
1928 1.00% 1.20%
1929 1.00% 41.20%
1930 0.50% 3.20%
1931 14.80% 5.00%
1932 9.70% 3.20%
1933 7.40% 20.60%
1934 35.20% 3.50%
1935 4.90% 0.80%
1936 2.70% 20.80%
1937 1.90% 27.40%
1938 23.90% 0.20%
1939 1.60% 1.90%
1940 15.10% 33.70%
1941 10.10% 2.30%
1942 0.10% 14.70%
1943 0.80% 5.00%
1944 0.60% 10.90%
1945 1.80% 2.00%
1946 10.20% 0.70%
1947 0.00% 20.90%
1948 0.20% 12.40%
1949 19.70% 25.80%
1950 6.10% 28.50%
1951 0.10% 12.30%
1952 5.80% 3.70%
1953 19.70% 1.00%
1954 5.40% 1.20%
1955 1.20% 29.00%
1956 0.00% 1.40%
1957 13.60% 0.50%
1958 8.70% 8.50%
1959 0.90% 0.50%
1960 0.60% 22.00%
1961 7.40% 4.10%
1962 0.00% 3.40%
1963 0.00% 14.00%
1964 0.10% 19.20%
1965 0.00% 9.00%
1966 0.00% 6.10%
1967 0.50% 1.80%
1968 0.70% 13.50%
1969 0.00% 5.90%
1970 0.30% 8.10%
1971 0.00% 18.00%
1972 0.60% 3.50%
1973 6.60% 7.30%
1974 3.30% 0.80%
1975 0.30% 9.70%
1976 0.30% 1.80%
1977 2.60% 3.80%
1978 10.20% 40.90%
1979 0.70% 40.20%
1980 0.60% 0.40%
1981 20.40% 1.70%
1982 0.20% 14.10%
1983 14.10% 6.90%
1984 3.40% 7.40%
1985 0.00% 2.80%
1986 42.20% 0.00%
1987 30.30% 2.10%
1988 0.30% 17.80%
1989 1.70% 0.80%
1990 30.60% 0.00%
1991 42.90% 0.40%
1992 35.40% 0.00%
1993 2.90% 2.70%
1994 7.90% 0.60%
1995 6.00% 0.00%
1996 10.70% 4.20%
1997 5.20% 0.10%
1998 57.80% 0.00%
1999 34.60% 0.90%
2000 44.90% 0.00%
2001 9.90% 0.00%
2002 14.20% 0.40%
2003 21.60% 0.30%
2004 11.50% 0.00%
2005 21.60% 0.00%
2006 58.30% 0.00%
2007 9.40% 0.20%
2008 0.50% 3.30%
2009 5.00% 0.30%
2010 17.50% 0.60%
2011 5.70% 0.80%
2012 72.60% 0.00%
2013 7.60% 0.60%
2014 14.70% 26.20%
2015 37.10% 3.10%

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.