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Mean Snowfall Throughout Water Year for Select Stations Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Satus Pass 2 SSW 0.2 4 11.7 14 5.3 1.8 1.1 0 0 0 0 0 Bickleton 0.2 4 8.9 8.9 4.5 2.5 0.7 0 0 0 0 0 Mc Nary Dam 0 0.2 0.8 1.3 0.6 0 0 0 0 0 0 0 Kennewick 0 0.3 1.8 3.7 0.9 0.1 0 0 0 0 0 0 Arlington, OR 0 0.7 2.2 3.8 1.3 0.2 0 0 0 0 0 0 Boardman, OR 0.1 0.6 2.9 1.9 1.6 0.2 0 0 0 0 0 0 John Day Dam 0 0 1 1.6 1.2 0.7 0 0 0 0 0 0 Kennewick 10 SW 0.2 1.3 5 6.9 1.9 1.1 0 0 0 0 0 0 Richland 0 0.7 2.5 3 1.7 0.3 0 0 0 0 0 0 Tabulated Mean Snowfall Data for Each Climate Station Mean Snowfall in Inches of Snow 0 5 10 15 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Snowfall in Inches of Snow Status Pass 2 SSW Bickleton McNary Dam Kennewick Mean Snowfall Data Figure 2-10 V:\030009 WRIA 31\Final Level 1\Figures 2-10_2-11_2-14.xls ---PAGE BREAK--- Seasonal Variation in Mean Precipitation for Select Stations Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Satus Pass 2 SSW 1.21 3.72 4.54 4.19 2.89 1.97 1.12 0.91 0.81 0.30 0.47 0.72 Bickleton 0.91 2.02 2.37 1.98 1.54 1.19 0.79 0.76 0.77 0.25 0.30 0.45 McNary Dam 0.61 1.11 1.10 1.04 0.76 0.69 0.58 0.62 0.41 0.20 0.31 0.34 Kennewick 0.58 1.01 1.12 1.09 0.75 0.66 0.49 0.60 0.47 0.22 0.28 0.32 Arlington, OR 0.61 1.29 1.51 1.48 0.99 0.77 0.56 0.59 0.40 0.18 0.24 0.35 Boardman, OR 0.57 1.20 1.23 1.18 0.92 0.70 0.69 0.59 0.43 0.26 0.30 0.40 John Day Dam 0.57 1.62 2.03 1.78 1.06 0.95 0.51 0.54 0.25 0.13 0.20 0.37 Kennewick 10 SW 0.80 1.36 1.48 1.34 0.73 0.72 0.59 0.73 0.74 0.18 0.24 0.33 Richland 0.52 0.96 1.03 1.01 0.71 0.61 0.50 0.54 0.49 0.21 0.25 0.27 Tabulated Mean Precipitation for each Climate Station Mean Precipitation in Inches 0.0 1.0 2.0 3.0 4.0 5.0 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Precipitation in Inches Satus Pass 2 SSW Bickleton McNary Dam Kennewick Mean Precipitation Data Figure 2-11 V:\030009 WRIA 31\Final Level 1\Figures 2-10_2-11_2-14.xls ---PAGE BREAK--- V:\030009 WRIA 31\Final Level 1\Figure 2-12.xls Long-Term Annual Precipitation 0 5 10 15 20 25 30 35 40 45 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 Water Year Annual Precipitation in Inches Satus Pass Satus Pass 2 SSW Bickleton McNary Dam Kennewick PDO Cycle Figure 2-12 Warm/Dry Warm/Dry Cool/Wet Cool/Wet