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 0.00% 9.90%
1911 3.10% 5.00%
1912 0.00% 1.60%
1913 3.10% 15.20%
1914 21.10% 0.00%
1915 0.00% 7.90%
1916 0.00% 3.40%
1917 0.00% 25.90%
1918 0.00% 35.80%
1919 1.60% 1.60%
1920 0.00% 14.60%
1921 11.30% 1.70%
1922 1.50% 3.20%
1923 1.60% 1.60%
1924 0.00% 1.50%
1925 3.20% 1.50%
1926 3.20% 3.30%
1927 0.00% 30.00%
1928 0.00% 3.40%
1929 0.00% 44.80%
1930 0.00% 44.70%
1931 1.60% 5.00%
1932 21.30% 0.00%
1933 1.60% 1.70%
1934 67.00% 0.00%
1935 0.00% 0.00%
1936 6.50% 1.70%
1937 0.00% 0.00%
1938 0.00% 5.20%
1939 7.90% 3.40%
1940 0.00% 0.00%
1941 16.10% 0.00%
1942 9.30% 0.00%
1943 39.80% 0.00%
1944 1.70% 0.00%
1945 1.70% 6.20%
1946 0.00% 31.60%
1947 0.00% 26.00%
1948 0.00% 3.20%
1949 28.50% 0.00%
1950 0.00% 20.70%
1951 1.60% 0.00%
1952 19.10% 0.00%
1953 0.00% 0.00%
1954 3.20% 6.20%
1955 0.00% 16.70%
1956 0.00% 9.90%
1957 0.00% 0.00%
1958 0.00% 0.00%
1959 1.70% 0.00%
1960 0.00% 1.50%
1961 1.70% 61.80%
1962 1.70% 14.00%
1963 0.00% 39.50%
1964 0.00% 3.20%
1965 0.00% 17.80%
1966 0.00% 54.90%
1967 1.70% 83.90%
1968 0.00% 6.50%
1969 1.70% 4.90%
1970 0.00% 6.50%
1971 0.00% 1.70%
1972 0.00% 80.60%
1973 1.50% 1.60%
1974 0.00% 52.10%
1975 1.50% 4.90%
1976 0.00% 82.00%
1977 0.00% 0.00%
1978 3.20% 3.30%
1979 0.00% 22.30%
1980 6.50% 3.20%
1981 11.50% 0.00%
1982 0.00% 4.70%
1983 0.00% 3.20%
1984 0.00% 14.80%
1985 0.00% 0.00%
1986 29.30% 0.00%
1987 28.60% 0.00%
1988 0.00% 6.40%
1989 22.00% 1.70%
1990 1.60% 1.60%
1991 32.10% 0.00%
1992 0.00% 1.50%
1993 30.70% 0.00%
1994 12.50% 0.00%
1995 31.90% 0.00%
1996 0.00% 0.00%
1997 0.00% 11.10%
1998 54.10% 0.00%
1999 28.20% 0.00%
2000 0.00% 1.70%
2001 0.00% 1.50%
2002 15.60% 0.00%
2003 12.90% 0.00%
2004 6.70% 0.00%
2005 95.10% 0.00%
2006 15.90% 0.00%
2007 14.80% 0.00%
2008 8.30% 1.50%
2009 16.70% 0.00%
2010 98.50% 0.00%
2011 84.00% 0.00%
2012 3.40% 0.00%
2013 48.50% 0.00%
2014 11.70% 1.50%
2015 71.00% 0.00%

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.