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 59.60% 0.00%
1911 12.20% 2.20%
1912 0.10% 35.00%
1913 0.50% 3.40%
1914 4.20% 2.00%
1915 1.90% 28.60%
1916 2.20% 7.40%
1917 0.00% 53.90%
1918 17.10% 0.70%
1919 0.80% 4.90%
1920 0.00% 31.80%
1921 28.60% 1.30%
1922 0.80% 18.10%
1923 0.00% 11.10%
1924 3.70% 51.10%
1925 31.60% 0.40%
1926 16.10% 30.60%
1927 4.90% 5.00%
1928 1.50% 4.70%
1929 2.00% 3.60%
1930 1.00% 0.90%
1931 9.20% 31.30%
1932 0.00% 5.60%
1933 1.90% 9.60%
1934 53.10% 0.10%
1935 2.60% 12.50%
1936 16.50% 0.10%
1937 0.00% 2.60%
1938 11.50% 1.70%
1939 13.60% 1.10%
1940 11.50% 17.50%
1941 5.50% 13.10%
1942 5.50% 2.90%
1943 1.80% 5.60%
1944 0.20% 12.30%
1945 17.30% 3.20%
1946 27.00% 0.20%
1947 9.30% 31.10%
1948 4.60% 12.20%
1949 2.40% 0.30%
1950 0.40% 25.90%
1951 0.00% 8.90%
1952 0.00% 3.20%
1953 1.30% 2.60%
1954 0.60% 3.10%
1955 23.90% 13.40%
1956 3.70% 6.30%
1957 0.00% 16.70%
1958 1.30% 30.80%
1959 1.70% 0.00%
1960 0.20% 34.00%
1961 0.20% 11.30%
1962 0.00% 1.20%
1963 18.50% 4.00%
1964 0.20% 10.30%
1965 0.00% 19.30%
1966 6.80% 1.10%
1967 17.70% 17.70%
1968 0.30% 2.80%
1969 0.00% 8.70%
1970 0.00% 10.00%
1971 0.20% 9.80%
1972 18.60% 1.00%
1973 0.10% 12.80%
1974 15.10% 2.80%
1975 0.70% 39.10%
1976 2.20% 0.40%
1977 42.70% 1.00%
1978 0.60% 6.00%
1979 0.00% 6.90%
1980 3.80% 9.70%
1981 9.50% 0.20%
1982 0.00% 1.60%
1983 0.90% 49.80%
1984 2.50% 29.00%
1985 29.50% 0.30%
1986 19.50% 0.00%
1987 40.60% 2.40%
1988 13.00% 0.00%
1989 17.70% 0.60%
1990 0.30% 0.00%
1991 19.10% 8.70%
1992 30.00% 1.10%
1993 0.50% 20.80%
1994 17.80% 0.00%
1995 2.80% 13.00%
1996 8.80% 15.30%
1997 8.60% 3.60%
1998 9.20% 7.90%
1999 2.30% 1.70%
2000 40.70% 0.00%
2001 7.00% 0.00%
2002 10.60% 7.60%
2003 1.60% 0.00%
2004 40.30% 0.00%
2005 0.90% 1.10%
2006 31.50% 0.70%
2007 37.00% 0.00%
2008 1.40% 1.80%
2009 1.60% 0.60%
2010 21.00% 3.80%
2011 16.30% 13.90%
2012 79.30% 0.00%
2013 7.40% 23.80%
2014 6.90% 4.80%
2015 15.30% 0.70%

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.