Precipitation annual maximum series (inches) Station ID: 24-1875 Station name: COHAGEN State: MT Latitude (decimal degrees): 47.0564 Longitude (decimal degrees): -106.6164 Elevation (feet): 2720 Duration: 15 minutes 05/16/1984 0.20 02/18/1985 1.00 09/18/1988 0.40 06/27/1990 0.60 06/30/1991 0.40 07/20/1993 0.40 06/06/1994 0.40 07/07/1995 0.60 08/27/1997 0.40 07/01/1998 0.30 07/18/1999 0.30 09/01/2000 0.80 06/16/2005 0.40 06/17/2008 0.70 07/01/2010 0.70 04/08/2011 0.20 06/08/2012 0.70 06/14/2013 1.00 05/28/2014 0.64 06/10/2015 0.15 06/24/2016 0.43 09/01/2017 0.87 05/30/2018 0.30 07/07/2019 0.70 05/20/2020 0.51 Duration: 30 minutes 05/16/1984 0.30 02/18/1985 1.10 09/18/1988 0.60 06/27/1990 1.10 06/30/1991 0.50 07/09/1993 0.60 06/06/1994 0.50 08/13/1995 0.80 06/06/1997 0.50 07/01/1998 0.50 07/18/1999 0.40 09/01/2000 1.00 06/19/2005 0.50 06/17/2008 0.90 07/01/2010 0.80 07/15/2011 0.32 06/08/2012 1.10 06/13/2013 1.10 05/28/2014 0.93 06/10/2015 0.27 07/27/2016 0.63 09/01/2017 0.95 05/30/2018 0.58 06/14/2019 0.78 05/20/2020 0.57 Duration: 45 minutes 05/16/1984 0.40 02/18/1985 1.12 09/18/1988 0.61 06/27/1990 1.12 07/14/1991 0.60 07/09/1993 0.61 06/06/1994 0.51 08/13/1995 0.82 06/06/1997 0.60 07/01/1998 0.51 07/18/1999 0.50 09/01/2000 1.02 06/27/2005 0.60 06/17/2008 1.10 07/01/2010 0.82 05/09/2011 0.40 06/08/2012 1.12 06/13/2013 1.20 05/28/2014 1.18 06/10/2015 0.36 07/27/2016 0.80 09/01/2017 0.97 05/30/2018 0.59 06/14/2019 0.87 05/20/2020 0.62 Duration: 1 hour 06/12/1950 0.25 05/20/1952 0.20 09/13/1967 0.61 07/15/1968 0.29 07/06/1969 0.70 07/27/1970 0.55 06/25/1971 0.50 08/14/1972 1.42 08/22/1973 0.45 08/08/1974 0.25 05/05/1975 0.30 07/04/1976 0.61 09/06/1977 0.31 06/13/1978 0.52 05/16/1984 0.35 02/18/1985 0.88 09/18/1988 0.62 06/27/1990 0.97 06/06/1991 0.62 07/09/1993 0.53 06/06/1994 0.53 08/13/1995 0.71 06/06/1997 0.53 07/01/1998 0.44 07/18/1999 0.44 07/09/2000 0.88 06/27/2005 0.53 06/17/2008 1.06 07/01/2010 0.71 07/15/2011 0.42 06/08/2012 0.97 06/13/2013 1.06 05/28/2014 1.10 06/10/2015 0.37 07/27/2016 0.76 09/01/2017 0.77 05/30/2018 0.52 07/07/2019 0.82 05/20/2020 0.58 Duration: 2 hours 09/30/1950 0.31 05/21/1952 0.35 09/13/1967 0.69 06/09/1968 0.44 07/06/1969 0.75 07/27/1970 0.79 08/30/1971 0.68 08/14/1972 1.95 08/22/1973 0.54 08/20/1974 0.36 05/05/1975 0.57 07/04/1976 0.66 09/06/1977 0.45 06/25/1978 0.69 06/11/1984 0.48 02/18/1985 0.95 07/29/1987 1.05 09/18/1988 0.67 06/27/1990 1.14 06/06/1991 0.76 07/09/1993 0.67 06/06/1994 0.76 08/13/1995 0.76 06/06/1997 0.57 04/24/1998 0.48 07/18/1999 0.48 07/09/2000 1.24 06/19/2005 0.67 06/17/2008 1.24 07/01/2010 0.76 07/15/2011 0.67 06/08/2012 1.14 05/18/2013 1.14 05/28/2014 1.22 06/10/2015 0.49 07/26/2016 0.90 09/01/2017 0.83 05/30/2018 0.59 06/14/2019 0.98 05/20/2020 0.64 Duration: 3 hours 09/30/1950 0.41 05/20/1952 0.41 09/13/1967 0.74 06/09/1968 0.50 07/20/1969 1.09 07/27/1970 0.95 08/30/1971 0.70 08/14/1972 2.13 06/18/1973 0.71 08/20/1974 0.50 05/05/1975 0.77 07/04/1976 0.67 09/06/1977 0.51 09/11/1978 0.94 06/11/1984 0.68 02/18/1985 0.97 09/24/1986 1.17 09/18/1988 1.07 06/27/1990 1.17 06/19/1991 0.87 07/09/1993 0.68 06/06/1994 0.78 08/13/1995 0.78 07/01/1997 0.68 04/24/1998 0.58 08/11/1999 0.58 07/09/2000 1.26 06/27/2005 1.07 06/17/2008 1.26 07/01/2010 0.78 07/15/2011 0.73 06/08/2012 1.17 05/18/2013 1.17 05/28/2014 1.24 06/10/2015 0.50 06/11/2016 0.96 09/01/2017 0.85 05/30/2018 0.60 06/14/2019 1.09 05/20/2020 0.67 Duration: 6 hours 06/08/1950 0.64 05/21/1952 0.45 04/28/1967 0.80 06/09/1968 0.57 07/20/1969 1.45 07/27/1970 1.16 08/30/1971 0.78 08/13/1972 2.48 06/18/1973 1.22 07/02/1974 0.72 05/05/1975 1.24 04/23/1976 0.97 09/06/1977 0.77 09/11/1978 1.10 06/11/1984 0.69 02/18/1985 0.98 09/24/1986 1.57 07/29/1987 1.47 09/18/1988 1.76 06/27/1990 1.18 06/19/1991 0.98 07/03/1993 0.78 06/06/1994 0.79 08/13/1995 0.79 07/01/1997 0.88 04/24/1998 0.88 08/11/1999 0.78 07/09/2000 1.28 06/08/2005 1.18 05/03/2007 1.57 06/17/2008 1.37 05/24/2010 1.08 07/15/2011 0.79 06/08/2012 1.18 05/18/2013 1.18 05/28/2014 1.26 06/01/2015 0.66 06/11/2016 0.98 09/01/2017 0.85 06/16/2018 0.72 06/14/2019 1.12 05/20/2020 0.68 Duration: 12 hours 06/08/1950 0.82 05/21/1952 0.54 09/13/1967 1.15 06/09/1968 0.76 07/20/1969 1.45 07/27/1970 1.17 08/30/1971 0.86 08/13/1972 2.50 06/18/1973 1.57 07/02/1974 0.84 05/05/1975 1.42 04/23/1976 1.13 09/06/1977 0.89 09/18/1978 1.44 06/11/1984 0.70 07/29/1985 1.19 09/24/1986 1.98 05/27/1987 1.88 09/18/1988 1.98 06/27/1990 1.29 06/19/1991 0.99 07/26/1993 1.19 10/07/1993 0.99 05/26/1995 0.89 09/16/1996 1.68 07/01/1997 1.58 04/24/1998 0.99 08/11/1999 0.99 07/09/2000 1.29 06/08/2005 1.39 05/03/2007 1.98 05/24/2010 1.39 05/10/2011 1.09 06/08/2012 1.19 05/29/2013 1.88 08/23/2014 1.34 06/01/2015 0.67 05/09/2016 1.01 10/04/2016 0.99 06/16/2018 0.97 06/20/2019 1.47 09/07/2020 1.01 Duration: 1 day 06/09/1968 0.70 07/20/1969 1.24 07/27/1970 1.01 08/30/1971 0.85 08/14/1972 2.61 06/18/1973 2.10 08/19/1974 1.24 05/06/1975 2.52 04/23/1976 1.18 09/30/1977 0.79 09/18/1978 1.76 05/06/1979 0.99 07/17/1980 0.65 10/22/1980 0.68 05/28/1982 1.20 05/09/1983 0.72 06/11/1984 0.68 07/29/1985 1.28 09/24/1986 1.79 05/26/1987 1.97 09/18/1988 1.71 07/14/1989 2.41 04/26/1990 1.20 06/19/1991 1.03 06/30/1992 2.22 07/26/1993 1.79 06/06/1994 1.20 05/26/1995 0.85 09/17/1996 1.84 07/01/1997 1.54 04/24/1998 0.94 08/11/1999 0.85 07/09/2000 1.88 06/13/2001 1.01 07/17/2002 1.10 06/01/2003 0.60 10/29/2003 1.02 06/27/2005 1.45 04/06/2006 1.50 05/03/2007 1.79 06/17/2008 1.40 04/29/2009 1.22 05/24/2010 1.45 05/09/2011 1.37 05/29/2013 2.48 08/23/2014 1.76 06/09/2015 0.62 05/10/2016 1.31 10/03/2016 1.23 06/16/2018 0.91 06/20/2019 1.54 09/06/2020 0.93 05/24/2021 0.71 07/10/2022 1.46 06/24/2023 1.93 Duration: 2 days 09/13/1967 2.32 06/29/1968 0.90 04/25/1969 1.62 04/27/1970 1.79 08/30/1971 1.06 08/14/1972 2.91 06/17/1973 2.36 08/20/1974 1.88 05/06/1975 2.79 04/23/1976 1.32 09/30/1977 1.21 09/11/1978 2.19 05/06/1979 1.09 07/17/1980 0.72 10/15/1980 1.00 05/28/1982 1.32 05/12/1983 0.87 06/11/1984 0.85 07/29/1985 1.79 09/24/1986 2.00 05/26/1987 2.55 09/18/1988 1.89 07/13/1989 2.86 06/27/1990 1.70 06/06/1991 1.32 06/30/1992 2.45 07/02/1993 2.08 10/07/1993 1.61 05/26/1995 1.02 09/17/1996 2.03 07/01/1997 1.70 04/24/1998 1.04 09/02/1999 1.30 07/09/2000 2.08 06/12/2001 1.15 08/07/2002 1.27 05/31/2003 0.67 10/28/2003 1.13 06/07/2005 1.70 04/06/2006 1.66 05/03/2007 2.00 05/01/2008 1.58 04/29/2009 1.35 05/23/2010 2.08 05/19/2011 2.17 05/29/2013 4.43 08/22/2014 2.55 06/10/2015 0.78 05/10/2016 1.58 10/02/2016 1.88 06/15/2018 1.16 06/19/2019 1.71 09/06/2020 1.03 05/23/2021 0.78 07/09/2022 1.72 06/07/2023 2.26 Duration: 3 days 09/12/1967 2.82 06/06/1968 0.93 06/25/1969 1.94 04/27/1970 1.91 08/30/1971 1.08 08/14/1972 3.00 06/17/1973 2.51 08/20/1974 1.94 05/06/1975 2.87 04/23/1976 1.35 09/06/1977 1.37 05/17/1978 2.68 05/06/1979 1.11 07/17/1980 0.76 10/15/1980 1.04 05/28/1982 1.35 09/29/1983 1.05 06/11/1984 1.06 07/29/1985 1.83 09/18/1986 2.06 05/25/1987 2.69 09/18/1988 1.93 07/12/1989 2.94 06/27/1990 1.73 06/28/1991 1.73 06/30/1992 2.50 07/02/1993 2.12 10/07/1993 1.66 05/26/1995 1.05 09/15/1996 2.13 07/01/1997 1.73 04/24/1998 1.06 09/02/1999 1.34 07/09/2000 2.21 06/11/2001 1.35 08/07/2002 1.52 06/09/2003 0.85 10/28/2003 1.15 06/26/2005 1.83 04/06/2006 1.69 05/03/2007 2.06 05/01/2008 1.61 04/29/2009 1.37 05/23/2010 2.12 05/20/2011 2.65 05/28/2013 4.90 08/22/2014 3.11 06/10/2015 0.80 05/10/2016 1.76 10/01/2016 2.41 06/15/2018 1.26 06/18/2019 1.96 09/06/2020 1.06 08/20/2021 1.05 07/09/2022 1.75 06/07/2023 2.77 Duration: 4 days 09/12/1967 3.04 06/05/1968 1.42 06/25/1969 1.96 04/27/1970 1.95 08/30/1971 1.18 08/14/1972 3.05 06/17/1973 2.56 08/20/1974 1.97 05/06/1975 2.93 06/04/1976 1.46 09/06/1977 1.38 05/17/1978 2.73 05/06/1979 1.12 06/12/1980 0.81 10/15/1980 1.05 05/28/1982 1.36 05/09/1983 1.55 06/07/1984 1.07 07/29/1985 1.85 09/18/1986 2.10 05/25/1987 2.72 09/18/1988 1.95 07/12/1989 3.00 06/25/1990 1.84 06/19/1991 1.84 06/27/1992 2.52 07/03/1993 2.21 10/07/1993 1.69 05/26/1995 1.07 09/14/1996 2.16 07/01/1997 1.75 06/12/1998 1.36 08/11/1999 1.65 07/09/2000 2.23 06/11/2001 1.36 08/05/2002 1.69 06/01/2003 1.00 10/28/2003 1.16 06/25/2005 1.94 04/06/2006 1.70 05/22/2007 2.10 05/01/2008 1.63 04/27/2009 1.44 05/23/2010 2.52 05/18/2011 3.01 05/27/2013 5.34 08/21/2014 3.19 06/01/2015 0.95 05/10/2016 1.79 10/01/2016 2.54 06/15/2018 1.28 06/17/2019 2.02 05/20/2020 1.33 08/19/2021 1.17 07/07/2022 2.26 06/07/2023 2.99 Duration: 7 days 09/12/1967 3.17 06/04/1968 1.87 06/21/1969 2.34 04/23/1970 2.04 08/30/1971 1.36 08/14/1972 4.01 06/14/1973 2.63 08/14/1974 2.06 05/01/1975 2.99 06/07/1976 1.86 09/06/1977 1.42 09/11/1978 2.89 05/06/1979 1.14 06/11/1980 0.88 10/16/1980 1.37 06/07/1982 1.90 05/06/1983 2.13 06/05/1984 1.47 07/29/1985 2.25 09/18/1986 4.02 05/25/1987 2.76 09/18/1988 1.96 07/12/1989 3.06 06/23/1990 2.25 06/19/1991 2.75 06/27/1992 2.55 07/20/1993 3.33 06/06/1994 2.06 08/11/1995 1.76 09/14/1996 2.26 07/01/1997 1.77 06/10/1998 1.47 08/28/1999 2.02 07/03/2000 2.75 06/12/2001 1.91 08/04/2002 2.02 05/31/2003 1.48 05/17/2004 1.22 06/22/2005 2.16 04/02/2006 1.72 05/20/2007 2.39 06/11/2008 2.52 04/29/2009 1.98 05/23/2010 2.65 05/17/2011 3.81 05/26/2013 5.69 08/21/2014 3.25 05/30/2015 1.08 07/05/2016 1.89 10/01/2016 2.58 06/15/2018 1.49 06/14/2019 3.22 05/20/2020 1.40 08/19/2021 1.19 07/04/2022 3.27 06/07/2023 3.02 Duration: 10 days 06/04/1968 1.92 06/19/1969 2.44 04/20/1970 2.17 08/29/1971 1.40 08/14/1972 4.13 06/14/1973 2.71 08/14/1974 2.38 04/27/1975 3.71 06/04/1976 2.56 09/23/1977 1.97 09/11/1978 4.72 05/06/1979 1.16 06/04/1980 1.07 10/15/1980 1.80 05/19/1982 2.09 05/06/1983 2.40 06/05/1984 1.60 07/29/1985 2.32 09/17/1986 4.14 05/18/1987 2.96 09/11/1988 2.33 07/06/1989 3.15 04/23/1990 2.32 06/22/1991 3.57 06/27/1992 2.70 07/03/1993 3.88 06/07/1994 2.27 08/13/1995 1.82 09/14/1996 2.35 06/22/1997 2.13 06/08/1998 1.96 08/28/1999 2.08 07/04/2000 2.83 06/11/2001 2.11 08/04/2002 2.06 05/31/2003 1.82 07/29/2004 1.28 06/20/2005 3.22 03/30/2006 2.18 05/22/2007 2.53 06/08/2008 3.10 04/29/2009 2.23 05/24/2010 3.07 05/17/2011 4.12 05/27/2013 5.86 08/15/2014 3.61 06/02/2015 1.87 07/06/2016 2.30 10/02/2016 2.66 06/15/2018 1.60 06/14/2019 3.31 05/21/2020 1.44 08/19/2021 1.51 07/04/2022 3.34 06/02/2023 3.49 Duration: 20 days 05/26/1968 2.85 06/19/1969 4.47 04/23/1970 3.26 05/30/1971 2.16 08/14/1972 4.17 06/02/1973 3.81 05/13/1974 3.19 04/24/1975 4.43 06/04/1976 3.70 08/20/1977 2.71 09/11/1978 4.72 04/20/1979 1.39 05/30/1980 1.54 05/08/1981 2.30 05/28/1982 3.31 05/06/1983 2.49 06/05/1984 1.93 07/29/1985 3.08 09/14/1986 4.83 05/13/1987 4.40 09/11/1988 2.39 04/24/1989 3.27 06/11/1990 2.42 06/13/1991 5.19 06/30/1992 3.49 07/03/1993 5.47 05/28/1994 2.65 05/26/1995 2.18 05/07/1996 2.71 06/30/1997 2.78 05/30/1998 2.31 08/15/1999 2.57 07/04/2000 3.18 06/03/2001 3.36 06/08/2002 2.44 05/27/2003 2.47 05/11/2004 1.72 06/12/2005 3.89 03/30/2006 3.03 05/14/2007 3.35 05/29/2008 4.00 04/23/2009 2.72 05/24/2010 3.54 05/08/2011 6.18 05/27/2013 7.64 08/05/2014 3.79 05/25/2015 2.34 07/09/2016 3.17 09/21/2016 3.76 05/31/2018 2.70 06/20/2019 3.58 05/05/2020 2.11 05/08/2021 1.57 06/23/2022 3.47 06/07/2023 5.67 Duration: 30 days 06/04/1968 3.36 06/19/1969 5.91 04/14/1970 3.82 05/30/1971 3.20 07/22/1972 4.68 05/21/1973 4.91 05/11/1974 3.32 04/26/1975 4.95 05/29/1976 4.35 09/06/1977 3.54 05/03/1978 5.91 05/06/1979 1.71 05/23/1980 1.80 05/02/1981 2.85 05/15/1982 4.49 05/06/1983 2.54 05/16/1984 2.41 07/24/1985 3.21 09/14/1986 5.12 05/02/1987 4.73 09/18/1988 2.47 04/20/1989 3.70 04/23/1990 2.80 06/02/1991 7.04 06/30/1992 4.81 06/28/1993 8.36 06/07/1994 3.21 05/26/1995 2.87 04/28/1996 4.30 06/06/1997 3.49 06/08/1998 2.86 08/06/1999 3.88 06/25/2000 3.28 05/29/2001 3.49 07/17/2002 3.40 05/27/2003 2.89 05/17/2004 1.96 05/31/2005 5.89 03/26/2006 3.23 05/03/2007 5.24 05/21/2008 5.59 06/14/2009 3.61 04/30/2010 4.31 05/07/2011 7.62 05/18/2013 8.92 08/15/2014 4.14 05/15/2015 2.90 09/05/2016 4.04 09/15/2017 3.80 05/07/2018 3.28 06/14/2019 5.24 06/08/2020 2.53 05/19/2021 1.80 06/11/2022 3.87 05/26/2023 7.57 Duration: 45 days 05/17/1968 4.29 06/19/1969 6.65 04/18/1970 4.75 05/17/1971 3.64 07/14/1972 5.76 05/21/1973 5.11 05/20/1974 3.81 03/26/1975 5.87 05/29/1976 5.61 08/20/1977 4.91 05/12/1978 7.08 04/16/1979 2.11 05/09/1980 2.27 05/07/1981 3.74 05/07/1982 5.11 05/06/1983 3.11 05/16/1984 2.74 07/14/1985 3.26 08/13/1986 5.69 05/16/1987 5.25 05/01/1988 3.19 04/16/1989 4.68 05/18/1990 4.39 05/20/1991 8.24 06/15/1992 5.18 06/13/1993 8.50 05/28/1994 3.72 05/26/1995 4.16 04/27/1996 4.67 06/06/1997 4.52 05/27/1998 3.49 08/06/1999 4.04 05/26/2000 4.48 06/12/2001 4.44 06/08/2002 4.19 04/29/2003 4.05 04/28/2004 2.45 05/17/2005 6.92 03/19/2006 3.56 04/19/2007 5.93 05/01/2008 6.35 06/01/2009 4.44 05/22/2010 5.32 05/07/2011 9.49 05/18/2013 10.20 08/03/2014 4.44 05/15/2015 3.36 09/03/2016 4.90 08/25/2017 3.84 05/07/2018 4.61 06/08/2019 5.86 05/21/2020 3.53 05/05/2021 2.24 06/05/2022 4.18 05/11/2023 9.27 Duration: 60 days 05/02/1968 4.90 06/19/1969 7.06 04/14/1970 5.65 05/14/1971 3.85 06/22/1972 6.86 04/20/1973 5.51 05/11/1974 5.34 04/29/1975 7.07 05/11/1976 6.24 08/04/1977 5.61 05/06/1978 8.83 05/06/1979 2.61 05/23/1980 2.76 05/02/1981 4.12 05/07/1982 5.53 05/06/1983 3.40 04/26/1984 3.00 07/29/1985 3.89 08/13/1986 6.39 05/20/1987 6.30 04/21/1988 3.45 04/01/1989 5.01 05/15/1990 5.18 05/20/1991 9.19 05/31/1992 6.09 05/29/1993 11.29 05/13/1994 4.36 05/09/1995 5.13 04/29/1996 5.58 05/23/1997 5.39 05/13/1998 3.60 07/15/1999 4.78 05/26/2000 5.11 06/03/2001 6.19 06/10/2002 5.28 04/16/2003 4.96 05/11/2004 3.13 05/08/2005 8.13 03/30/2006 4.12 04/19/2007 6.60 04/21/2008 7.76 06/06/2009 4.77 05/24/2010 6.20 04/22/2011 10.55 05/18/2013 10.73 07/22/2014 4.69 05/15/2015 3.67 05/30/2016 6.32 09/15/2017 3.87 05/07/2018 5.81 05/17/2019 7.83 05/21/2020 4.65 05/08/2021 2.78 05/12/2022 5.16 05/06/2023 10.53