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 5.90% 8.30%
1911 18.70% 18.50%
1912 0.40% 51.60%
1913 2.20% 16.80%
1914 2.60% 6.40%
1915 1.50% 7.40%
1916 0.80% 45.80%
1917 0.00% 71.20%
1918 1.80% 6.00%
1919 2.30% 15.10%
1920 0.40% 12.10%
1921 42.90% 0.40%
1922 10.40% 15.00%
1923 2.30% 9.00%
1924 0.00% 61.30%
1925 9.30% 0.60%
1926 6.10% 10.60%
1927 15.10% 4.30%
1928 1.20% 2.30%
1929 0.20% 40.10%
1930 0.00% 9.70%
1931 33.30% 1.10%
1932 2.50% 12.20%
1933 14.90% 6.80%
1934 35.20% 3.00%
1935 2.50% 4.80%
1936 1.80% 10.00%
1937 0.00% 4.90%
1938 14.60% 0.20%
1939 2.00% 0.70%
1940 17.00% 26.00%
1941 25.60% 0.70%
1942 0.00% 5.50%
1943 0.60% 6.00%
1944 0.30% 9.90%
1945 0.50% 3.00%
1946 9.50% 2.40%
1947 0.20% 3.30%
1948 0.80% 15.20%
1949 12.00% 20.90%
1950 0.00% 28.20%
1951 0.00% 25.40%
1952 0.80% 5.10%
1953 9.10% 2.30%
1954 11.50% 0.30%
1955 0.00% 19.40%
1956 0.00% 4.80%
1957 4.80% 0.50%
1958 12.80% 12.60%
1959 0.70% 1.30%
1960 0.00% 11.30%
1961 0.20% 7.40%
1962 0.20% 3.70%
1963 1.70% 24.50%
1964 0.00% 14.40%
1965 0.20% 1.90%
1966 0.00% 17.70%
1967 1.50% 7.20%
1968 0.00% 18.10%
1969 0.50% 7.10%
1970 0.30% 3.70%
1971 0.00% 5.10%
1972 0.00% 4.20%
1973 17.20% 5.20%
1974 0.30% 1.60%
1975 0.40% 12.10%
1976 0.00% 42.50%
1977 1.90% 0.70%
1978 1.30% 27.50%
1979 1.00% 31.00%
1980 1.20% 0.70%
1981 25.90% 7.00%
1982 1.00% 2.50%
1983 10.40% 7.10%
1984 1.30% 2.30%
1985 0.50% 17.80%
1986 31.40% 0.00%
1987 24.10% 1.90%
1988 0.70% 11.00%
1989 0.60% 13.30%
1990 20.60% 0.50%
1991 25.90% 0.00%
1992 14.50% 0.20%
1993 0.30% 6.90%
1994 8.50% 0.30%
1995 11.50% 0.00%
1996 9.50% 12.20%
1997 8.50% 1.10%
1998 75.10% 0.00%
1999 27.00% 0.70%
2000 17.80% 0.30%
2001 29.90% 0.00%
2002 16.50% 0.60%
2003 28.40% 0.00%
2004 24.10% 0.00%
2005 31.50% 0.00%
2006 44.90% 0.30%
2007 24.90% 0.00%
2008 1.60% 1.90%
2009 2.80% 0.80%
2010 18.50% 0.80%
2011 15.90% 0.90%
2012 77.20% 0.00%
2013 7.30% 2.10%
2014 25.90% 10.30%
2015 69.20% 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.