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 2.80% 3.00%
1911 21.80% 6.30%
1912 0.90% 50.40%
1913 1.40% 27.80%
1914 4.90% 3.30%
1915 1.70% 3.30%
1916 2.20% 22.50%
1917 0.20% 67.50%
1918 2.30% 10.30%
1919 2.50% 5.20%
1920 0.40% 17.00%
1921 43.00% 0.80%
1922 11.70% 25.30%
1923 0.80% 12.00%
1924 0.00% 33.80%
1925 13.90% 0.00%
1926 11.40% 14.80%
1927 21.30% 0.80%
1928 1.70% 1.80%
1929 2.10% 43.40%
1930 0.70% 3.80%
1931 13.40% 6.80%
1932 6.20% 3.40%
1933 9.70% 23.40%
1934 33.40% 4.60%
1935 3.30% 0.50%
1936 2.00% 31.20%
1937 2.90% 31.90%
1938 25.50% 0.20%
1939 1.50% 1.90%
1940 15.60% 34.90%
1941 10.90% 3.40%
1942 0.80% 14.60%
1943 0.80% 4.30%
1944 1.00% 9.70%
1945 1.60% 1.60%
1946 11.50% 1.70%
1947 0.00% 10.50%
1948 0.30% 9.20%
1949 15.90% 24.30%
1950 7.40% 25.70%
1951 0.60% 12.10%
1952 5.50% 2.80%
1953 24.80% 0.40%
1954 3.00% 0.30%
1955 0.70% 28.30%
1956 0.00% 0.40%
1957 15.40% 0.50%
1958 9.90% 12.90%
1959 0.70% 0.40%
1960 0.50% 19.20%
1961 7.50% 2.70%
1962 0.00% 1.20%
1963 0.00% 12.60%
1964 0.00% 22.10%
1965 0.00% 6.70%
1966 0.00% 12.00%
1967 0.70% 1.50%
1968 0.50% 13.60%
1969 0.00% 5.30%
1970 0.30% 6.60%
1971 0.00% 16.10%
1972 0.70% 3.20%
1973 8.80% 6.50%
1974 5.20% 0.70%
1975 0.50% 11.50%
1976 0.10% 2.60%
1977 2.10% 5.80%
1978 12.60% 42.70%
1979 0.50% 42.00%
1980 0.90% 0.90%
1981 21.90% 2.50%
1982 0.20% 17.50%
1983 12.50% 8.00%
1984 3.70% 5.20%
1985 0.20% 4.40%
1986 47.30% 0.20%
1987 31.80% 1.30%
1988 0.30% 20.70%
1989 1.70% 0.80%
1990 35.50% 0.00%
1991 47.10% 0.60%
1992 48.70% 0.00%
1993 4.10% 0.80%
1994 7.20% 2.90%
1995 7.50% 0.00%
1996 8.20% 2.90%
1997 6.80% 0.40%
1998 48.90% 0.90%
1999 27.10% 0.50%
2000 54.10% 0.00%
2001 6.20% 0.00%
2002 10.20% 0.70%
2003 16.10% 0.50%
2004 13.90% 0.10%
2005 21.70% 0.00%
2006 50.40% 0.00%
2007 4.80% 0.40%
2008 0.70% 4.00%
2009 4.80% 0.30%
2010 15.20% 0.60%
2011 1.50% 2.90%
2012 70.30% 0.00%
2013 3.80% 1.20%
2014 10.90% 21.60%
2015 37.20% 4.00%

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.