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Estimated Annual-Mean Streamflow Entering Chesapeake Bay, By Water Year

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For each water water year, annual-mean streamflow entering the Bay is calculated using monthly mean data (Figure 1; Table 1). Select individual water years in Table 1 to see monthly data for that year; Click column headings in Table 1 to change the sort order.

Figure 1. Estimated annual-mean streamflow entering the Chesapeake Bay. The normal band (white), represents flow values between the 25th and 75th percentiles. Bars are shaded with respect to this normal band: blue for above normal, red for below normal, and gray for normal. (view plot data)

Table 1. Annual-mean streamflow entering Chesapeake Bay, for all water years in the period of record. Flow classification is made on the basis of the 25th and 75th percentile of all annual-mean flow values. Annual-mean streamflow is not available for the current water year.
Water Year Annual-Mean Streamflow to Bay Flow Classification Relative Magnitude of Streamflow
2017 (current) -- --
2016 71600 Normal
 
2015 63500 Below Normal
 
2014 81300 Normal
 
2013 76000 Normal
 
2012 80000 Normal
 
2011 113000 Above Normal
 
2010 79900 Normal
 
2009 63400 Below Normal
 
2008 74300 Normal
 
2007 79500 Normal
 
2006 77500 Normal
 
2005 87600 Normal
 
2004 118000 Above Normal
 
2003 119000 Above Normal
 
2002 45400 Below Normal
 
2001 52600 Below Normal
 
2000 70600 Normal
 
1999 45600 Below Normal
 
1998 106000 Above Normal
 
1997 89800 Above Normal
 
1996 115000 Above Normal
 
1995 59900 Below Normal
 
1994 107000 Above Normal
 
1993 101000 Above Normal
 
1992 60400 Below Normal
 
1991 84000 Normal
 
1990 75600 Normal
 
1989 76400 Normal
 
1988 59300 Below Normal
 
1987 78100 Normal
 
1986 78100 Normal
 
1985 56800 Below Normal
 
1984 108000 Above Normal
 
1983 75900 Normal
 
1982 75100 Normal
 
1981 49200 Below Normal
 
1980 86000 Normal
 
1979 96300 Above Normal
 
1978 113000 Above Normal
 
1977 79100 Normal
 
1976 81700 Normal
 
1975 96000 Above Normal
 
1974 88100 Normal
 
1973 110000 Above Normal
 
1972 121000 Above Normal
 
1971 85600 Normal
 
1970 71500 Normal
 
1969 55700 Below Normal
 
1968 68500 Normal
 
1967 67500 Normal
 
1966 48600 Below Normal
 
1965 48900 Below Normal
 
1964 62800 Below Normal
 
1963 58500 Below Normal
 
1962 70000 Normal
 
1961 72400 Normal
 
1960 92500 Above Normal
 
1959 54800 Below Normal
 
1958 85400 Normal
 
1957 70100 Normal
 
1956 74400 Normal
 
1955 72800 Normal
 
1954 50900 Below Normal
 
1953 81400 Normal
 
1952 90700 Above Normal
 
1951 98200 Above Normal
 
1950 78200 Normal
 
1949 89300 Normal
 
1948 77700 Normal
 
1947 67500 Normal
 
1946 86500 Normal
 
1945 80000 Normal
 
1944 64100 Below Normal
 
1943 98000 Above Normal
 
1942 62500 Below Normal
 
1941 56000 Below Normal
 
1940 76000 Normal
 
1939 67800 Normal
 
1938 77100 Normal
 
1937 90600 Above Normal
 

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