Precipitation annual maximum series (inches) Station ID: 79-0105 Station name: HELENA WB CITY State: MT Latitude (decimal degrees): 46.5833 Longitude (decimal degrees): -112.0333 Elevation (feet): 4144 Duration: 1 day 12/12/1867 2.00 01/12/1881 1.13 09/18/1882 2.10 01/02/1884 1.06 06/11/1885 1.11 09/05/1886 1.02 06/15/1887 0.77 05/01/1888 0.80 05/14/1889 0.73 06/01/1890 0.60 06/09/1891 0.88 10/12/1891 2.23 09/30/1893 1.63 09/06/1894 0.80 02/02/1895 0.82 05/06/1896 0.75 11/25/1896 1.30 05/13/1898 1.51 09/03/1899 0.53 05/12/1900 2.00 09/03/1901 1.59 05/20/1902 1.66 04/04/1903 0.50 07/02/1904 0.76 05/09/1905 1.12 09/14/1906 1.05 06/23/1907 1.82 06/05/1908 3.14 06/08/1909 1.19 08/29/1910 0.91 09/03/1911 1.52 05/01/1912 1.14 10/04/1912 0.89 05/10/1914 1.45 06/11/1915 2.16 05/24/1916 0.98 05/28/1917 0.70 07/15/1918 0.90 05/15/1919 0.29 09/24/1920 1.20 10/12/1920 1.16 06/14/1922 0.82 08/20/1923 0.92 09/17/1924 0.47 09/19/1925 0.96 07/08/1926 1.11 05/29/1927 1.51 08/22/1928 0.70 03/11/1929 0.69 12/07/1929 0.51 06/29/1931 0.60 06/05/1932 0.84 08/20/1933 1.89 06/07/1934 0.87 03/04/1935 0.56 06/02/1936 0.63 09/21/1937 1.30 05/19/1938 0.82 10/15/1938 0.92 05/24/1953 1.97 05/30/1954 1.30 Duration: 2 days 05/25/1866 2.50 12/12/1867 2.50 12/25/1880 2.00 09/17/1882 2.69 01/02/1884 2.09 06/11/1885 1.73 09/04/1886 1.62 06/14/1887 1.06 05/04/1888 1.24 05/14/1889 0.84 03/30/1890 0.70 06/13/1891 1.16 06/10/1892 2.87 09/29/1893 1.80 09/06/1894 0.88 02/02/1895 1.04 05/05/1896 0.91 11/24/1896 1.54 06/30/1898 2.42 05/19/1899 0.77 05/12/1900 2.26 09/03/1901 1.76 05/20/1902 1.83 05/16/1903 0.90 07/02/1904 0.84 05/09/1905 1.24 09/14/1906 1.28 06/22/1907 3.12 06/04/1908 3.67 06/08/1909 1.81 06/07/1910 1.10 09/03/1911 1.68 05/01/1912 1.40 06/11/1913 0.98 05/10/1914 1.75 06/11/1915 2.43 06/21/1916 1.44 05/28/1917 1.24 07/14/1918 1.77 05/15/1919 0.44 05/10/1920 1.56 10/12/1920 1.28 06/14/1922 1.08 06/21/1923 1.07 10/07/1923 0.82 04/22/1925 1.50 05/08/1926 1.36 05/28/1927 2.61 11/04/1927 1.07 03/11/1929 0.87 12/09/1929 0.78 06/28/1931 0.90 06/05/1932 0.95 08/20/1933 2.87 06/06/1934 1.41 03/04/1935 0.62 06/01/1936 0.98 09/20/1937 1.52 05/18/1938 1.43 10/14/1938 1.27 05/24/1953 2.34 05/30/1954 1.43 Duration: 3 days 05/25/1866 2.55 12/12/1867 2.70 12/25/1880 2.48 09/16/1882 3.23 01/02/1884 2.80 06/10/1885 1.79 09/04/1886 1.65 06/14/1887 1.23 05/04/1888 1.26 05/06/1889 0.91 05/30/1890 0.83 06/12/1891 1.56 06/10/1892 3.24 09/29/1893 1.83 06/11/1894 1.02 01/31/1895 1.39 05/04/1896 0.98 11/24/1896 1.66 06/30/1898 2.47 05/19/1899 1.06 05/12/1900 2.30 09/03/1901 1.79 05/19/1902 1.87 05/16/1903 1.18 06/30/1904 0.86 05/09/1905 1.40 05/26/1906 1.38 06/21/1907 3.60 06/03/1908 4.10 06/07/1909 2.22 06/06/1910 1.17 09/03/1911 2.01 05/20/1912 1.91 06/10/1913 1.19 05/09/1914 1.88 06/10/1915 2.49 06/20/1916 1.78 05/27/1917 1.44 07/14/1918 1.80 05/15/1919 0.45 05/10/1920 1.76 10/12/1920 1.30 06/14/1922 1.12 06/21/1923 1.16 10/07/1923 0.87 04/22/1925 1.53 05/08/1926 1.62 05/27/1927 2.95 11/03/1927 1.14 03/11/1929 0.89 12/09/1929 1.04 06/27/1931 1.06 06/04/1932 1.02 08/20/1933 2.94 06/06/1934 1.49 07/02/1935 0.63 06/01/1936 1.19 09/20/1937 1.58 05/17/1938 1.97 10/14/1938 1.31 05/23/1953 2.55 05/30/1954 2.43 Duration: 4 days 05/25/1866 2.57 12/12/1867 2.73 12/25/1880 2.57 09/15/1882 3.26 01/02/1884 2.83 06/10/1885 1.81 09/04/1886 1.67 06/13/1887 1.29 05/01/1888 1.54 05/14/1889 0.94 05/29/1890 0.89 06/11/1891 1.58 06/08/1892 3.32 05/21/1893 1.96 06/11/1894 1.06 01/31/1895 1.61 05/06/1896 1.51 11/24/1896 1.68 06/30/1898 2.49 01/28/1899 1.19 05/12/1900 2.33 09/03/1901 1.82 05/17/1902 1.89 05/16/1903 1.19 06/30/1904 0.86 05/08/1905 1.43 05/26/1906 1.56 06/20/1907 3.75 06/03/1908 4.16 06/06/1909 2.33 08/29/1910 1.30 09/03/1911 2.06 05/20/1912 1.93 06/10/1913 1.27 05/09/1914 1.90 06/10/1915 2.51 06/19/1916 1.99 05/27/1917 1.60 07/12/1918 1.83 02/26/1919 0.54 05/09/1920 1.78 10/12/1920 1.32 06/06/1922 1.24 06/21/1923 1.41 10/07/1923 0.88 04/22/1925 1.54 05/07/1926 1.72 05/27/1927 3.05 07/16/1928 1.17 03/11/1929 0.90 12/07/1929 1.48 06/27/1931 1.07 03/02/1932 1.19 08/20/1933 2.97 06/04/1934 1.61 10/13/1934 0.64 06/01/1936 1.20 09/20/1937 1.75 05/17/1938 2.08 10/14/1938 1.54 05/23/1953 2.57 05/30/1954 2.45 Duration: 7 days 05/25/1866 3.00 08/30/1881 3.45 09/15/1882 3.29 12/29/1883 2.85 06/06/1885 2.48 04/21/1886 1.78 06/10/1887 1.80 04/29/1888 2.38 05/08/1889 1.13 05/27/1890 1.03 06/08/1891 2.65 06/10/1892 3.90 05/20/1893 2.08 06/07/1894 1.40 01/31/1895 2.02 05/04/1896 1.76 11/20/1896 2.18 05/13/1898 2.78 05/15/1899 1.64 05/12/1900 2.40 09/03/1901 1.96 05/15/1902 2.49 05/16/1903 1.20 11/10/1903 0.94 05/08/1905 1.45 05/24/1906 1.74 06/20/1907 3.79 05/30/1908 5.36 06/04/1909 2.45 08/29/1910 1.38 09/03/1911 2.08 05/01/1912 2.00 06/07/1913 1.61 05/09/1914 1.92 06/05/1915 2.82 06/19/1916 2.08 05/24/1917 2.34 07/14/1918 2.16 02/25/1919 0.73 05/09/1920 1.79 10/07/1920 1.33 06/08/1922 1.55 06/21/1923 1.82 06/06/1924 0.95 05/30/1925 2.14 05/04/1926 1.92 05/25/1927 3.28 11/04/1927 1.42 09/23/1929 1.07 12/06/1929 2.02 06/27/1931 1.51 02/29/1932 1.35 08/20/1933 3.00 06/01/1934 2.31 07/02/1935 0.82 06/01/1936 2.08 09/20/1937 1.87 05/17/1938 2.36 10/09/1938 1.75 05/23/1953 2.82 05/30/1954 2.88 Duration: 10 days 05/25/1866 3.50 12/04/1867 4.50 08/30/1881 3.52 09/16/1882 3.52 12/26/1883 3.09 06/03/1885 3.23 04/13/1886 2.45 05/12/1887 2.22 04/26/1888 2.43 05/06/1889 1.82 05/25/1890 1.09 06/09/1891 3.09 06/07/1892 4.47 05/16/1893 2.12 05/15/1894 1.54 01/28/1895 2.28 05/02/1896 1.80 11/17/1896 2.32 05/13/1898 2.87 05/15/1899 1.67 05/12/1900 2.63 05/21/1901 2.29 05/15/1902 2.54 05/16/1903 1.55 07/02/1904 1.14 05/02/1905 1.67 05/27/1906 2.25 06/14/1907 3.88 05/27/1908 5.78 06/04/1909 2.54 08/29/1910 1.75 09/03/1911 2.12 10/02/1911 2.14 06/07/1913 1.72 06/04/1914 2.39 06/03/1915 4.69 06/20/1916 2.91 05/20/1917 2.84 07/14/1918 2.56 02/21/1919 0.90 05/04/1920 1.83 10/12/1920 1.63 06/06/1922 2.35 06/17/1923 2.38 09/17/1924 1.02 05/29/1925 2.56 05/04/1926 2.00 05/21/1927 5.28 06/26/1928 1.55 09/20/1929 1.11 12/07/1929 2.27 06/27/1931 1.77 02/29/1932 1.38 08/20/1933 3.06 06/01/1934 2.39 06/29/1935 0.96 06/01/1936 2.12 09/20/1937 2.19 06/16/1938 2.41 10/08/1938 2.09 05/24/1953 3.47 05/28/1954 2.94 Duration: 20 days 05/25/1866 5.10 12/04/1867 6.00 12/24/1880 4.02 09/15/1882 4.28 06/05/1884 3.99 06/01/1885 4.05 04/13/1886 2.66 06/09/1887 2.63 04/16/1888 2.64 05/03/1889 2.08 05/14/1890 1.53 05/30/1891 4.80 06/07/1892 5.41 04/20/1893 2.87 06/07/1894 1.91 01/19/1895 2.83 05/04/1896 2.19 06/14/1897 3.07 05/13/1898 4.97 05/15/1899 1.87 04/23/1900 3.72 05/18/1901 3.16 05/01/1902 3.20 05/16/1903 1.84 06/30/1904 1.32 06/08/1905 2.21 05/19/1906 3.19 06/20/1907 4.21 05/18/1908 7.86 06/04/1909 3.22 08/29/1910 2.15 05/15/1911 2.45 04/16/1912 2.78 06/07/1913 2.57 06/05/1914 3.16 05/24/1915 5.33 06/20/1916 3.47 05/23/1917 3.62 07/10/1918 3.18 02/11/1919 1.11 04/23/1920 2.98 09/24/1920 2.58 05/26/1922 3.23 06/07/1923 3.14 05/23/1924 1.32 04/04/1925 2.86 09/05/1926 2.44 05/16/1927 5.67 06/14/1928 2.80 09/09/1929 1.57 11/30/1929 2.62 06/21/1931 1.85 06/04/1932 2.05 08/20/1933 3.34 06/01/1934 2.47 10/13/1934 1.01 05/19/1936 2.49 09/20/1937 2.47 06/16/1938 4.47 05/18/1939 2.61 05/19/1953 4.64 05/22/1954 4.35 Duration: 30 days 05/25/1866 6.50 12/04/1867 6.90 12/21/1880 4.74 09/15/1882 4.46 05/28/1884 4.56 05/26/1885 4.53 04/13/1886 2.99 04/21/1887 3.71 04/29/1888 3.10 05/03/1889 2.20 05/28/1890 2.16 05/28/1891 5.65 06/07/1892 6.70 04/23/1893 4.49 05/15/1894 3.05 01/17/1895 2.87 04/10/1896 2.96 05/30/1897 4.10 05/07/1898 6.27 05/15/1899 2.50 04/22/1900 4.83 05/02/1901 4.11 05/01/1902 3.50 04/27/1903 1.89 06/16/1904 1.84 05/28/1905 2.87 05/15/1906 3.88 06/20/1907 4.85 05/08/1908 10.43 06/06/1909 4.61 08/29/1910 2.70 05/15/1911 3.47 04/24/1912 4.45 06/07/1913 3.33 06/02/1914 3.67 05/13/1915 5.98 06/19/1916 4.56 05/15/1917 4.42 11/29/1917 3.58 02/02/1919 1.48 04/14/1920 3.59 09/24/1920 3.14 05/26/1922 3.65 05/30/1923 3.79 09/17/1924 1.75 09/18/1925 3.69 06/13/1926 3.41 05/01/1927 6.67 06/08/1928 3.36 03/11/1929 1.92 12/07/1929 2.83 06/08/1931 2.26 05/18/1932 2.47 08/20/1933 3.49 06/01/1934 2.85 09/22/1934 1.39 05/19/1936 2.66 09/20/1937 2.50 06/12/1938 5.14 05/21/1939 3.48 05/10/1953 4.82 05/30/1954 4.73 Duration: 45 days 05/10/1866 7.20 12/04/1867 7.20 12/01/1880 6.49 09/15/1882 4.73 06/05/1884 6.25 06/01/1885 5.27 03/26/1886 3.46 05/13/1887 5.24 04/25/1888 4.20 05/03/1889 2.52 05/09/1890 3.05 05/29/1891 7.75 06/07/1892 7.88 04/23/1893 5.12 05/15/1894 3.57 12/24/1894 4.00 04/10/1896 3.44 05/25/1897 5.02 05/07/1898 7.06 04/22/1899 2.83 04/09/1900 5.35 04/25/1901 5.46 04/20/1902 4.27 06/20/1903 3.17 05/19/1904 2.61 05/02/1905 3.39 04/23/1906 4.63 06/07/1907 5.23 05/08/1908 10.92 05/07/1909 5.62 08/23/1910 2.99 05/13/1911 4.56 04/12/1912 5.18 05/13/1913 4.06 05/03/1914 5.00 04/30/1915 7.15 05/19/1916 5.71 04/23/1917 4.68 07/10/1918 4.14 02/05/1919 1.71 04/09/1920 4.17 09/22/1920 3.38 05/26/1922 4.70 05/24/1923 4.71 09/05/1924 1.88 04/22/1925 5.01 09/15/1925 5.03 04/29/1927 7.44 06/08/1928 4.67 02/27/1929 2.15 12/06/1929 3.31 05/26/1931 3.17 06/05/1932 2.96 08/20/1933 3.64 06/01/1934 2.98 09/19/1934 1.64 04/24/1936 3.31 06/03/1937 2.89 05/17/1938 5.93 05/07/1939 4.13 04/23/1953 5.29 05/30/1954 5.47 Duration: 60 days 04/26/1866 7.90 12/04/1867 7.70 12/01/1880 7.60 09/15/1882 4.80 05/28/1884 7.83 05/30/1885 5.62 09/04/1886 3.97 04/20/1887 6.20 04/29/1888 5.03 05/03/1889 2.60 05/09/1890 3.59 05/27/1891 8.35 05/23/1892 8.25 04/15/1893 5.56 05/15/1894 3.94 12/20/1894 4.11 03/13/1896 4.29 05/25/1897 6.36 05/07/1898 9.62 04/16/1899 3.34 04/09/1900 5.72 04/25/1901 6.21 05/08/1902 4.87 05/16/1903 3.56 05/19/1904 3.15 05/02/1905 4.84 04/23/1906 5.19 05/19/1907 5.90 04/21/1908 11.20 05/07/1909 7.07 05/09/1910 3.57 05/08/1911 5.53 04/12/1912 5.47 04/28/1913 5.11 04/27/1914 6.07 06/01/1915 8.09 05/19/1916 7.12 04/12/1917 5.83 06/13/1918 4.50 02/02/1919 1.89 03/14/1920 4.98 09/10/1920 3.66 04/25/1922 5.08 05/09/1923 6.17 05/25/1924 2.37 04/15/1925 5.98 05/04/1926 5.03 05/06/1927 8.07 06/08/1928 5.41 01/13/1929 3.04 11/18/1929 3.44 05/09/1931 3.33 04/20/1932 3.60 08/20/1933 4.27 04/30/1934 3.42 03/04/1935 1.92 04/22/1936 4.00 06/03/1937 4.14 05/17/1938 7.71 05/16/1939 4.53 04/05/1953 5.87 05/22/1954 6.25