Normal

20.59 in  

Maximum  -  1973

28.93 in  

Minimum   -  1972

6.63 in  

McCook, Nebraska 1961-1990

Mean Annual

51.9 °F  

Daily Maximum  -  07/11/1954

110 °F  

Daily Minimum   -  12/22/1989

-27 °F  

McCook, Nebraska 1948-1996

Growing Season

161 days  

Elevation of irrigable area

2,000 - 2,740 ft  

Drainage area at Enders Dam (total)

950 mi²  

Direct contributing area

790 mi²  

Annual discharge:

    Maximum  -  1949

72,379 acre-ft  

    Minimum   -  1992

10,982 acre-ft  

    Average  -  1946-1993

38,753 acre-ft  

Drainage area at Trenton Dam (total)

8,650 mi²  

Direct contributing area

3,940 mi²  

Annual discharge:

    Maximum  -  1951

221,408 acre-ft  

    Minimum   -  1979

6,145 acre-ft  

    Average    -  1946-1993

49,983 acre-ft  

Drainage area at Medicine Creek Dam (total)

  880 mi²  

Direct contributing area

  640 mi²  

Annual discharge:

    Maximum  -  1962

95,462 acre-ft  

    Minimum   -  1950

2,700 acre-ft  

    Average    -  1950-1994

43,341 acre-ft  

Drainage area at Red Willow Dam (total)

730 mi²  

Direct contributing area

310 mi²  

Annual discharge:

    Maximum  -  1974

86,094 acre-ft  

    Minimum   -  1931

17,623 acre-ft  

    Average    -  1940-1993

63,820 acre-ft