Historical and modeled monthly values for Lake Huron (no GB) for the 64 months prior to the forecast outlooks starting 03May2018 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Basin Runoff to Lake (mm) 2013 47.61 44.01 42.77 83.05 40.03 20.64 11.31 13.05 12.93 22.13 40.90 26.11 2014 36.30 23.62 37.05 54.08 40.90 16.16 14.05 15.42 18.15 22.25 27.97 30.96 2015 23.50 14.79 34.06 31.20 18.28 27.10 10.69 8.21 12.56 12.06 21.63 31.08 2016 29.71 39.91 54.33 59.67 30.83 14.05 9.95 18.65 9.08 13.18 14.05 26.85 2017 46.12 35.31 46.12 60.92 44.88 23.99 15.42 10.44 10.19 30.09 40.53 26.98 2018 50.60 52.59 42.64 53.46 - - - - - - - - Total Over-Lake Precipitation (mm) 2013 69.97 38.93 27.19 127.27 98.90 64.02 59.01 64.23 51.42 110.00 71.50 46.57 2014 41.50 28.39 29.85 94.20 73.39 60.33 96.81 77.09 93.73 76.76 66.20 38.45 2015 28.87 18.65 18.93 48.51 71.31 96.85 44.09 70.05 76.07 60.80 61.86 71.96 2016 47.28 46.07 105.80 48.38 50.24 42.12 62.71 104.78 70.84 63.63 43.58 53.10 2017 64.50 49.30 64.16 104.52 68.47 134.35 70.52 68.41 43.86 116.23 65.79 51.51 2018 56.42 55.78 26.00 85.79 - - - - - - - - Total Lake Evaporation (mm) 2013 88.42 48.94 37.56 18.77 0.59 -0.43 19.67 34.36 69.10 72.75 115.45 117.20 2014 83.58 33.41 23.49 5.47 -2.60 -4.14 1.10 18.18 47.75 60.43 106.28 72.09 2015 78.91 50.22 22.34 5.30 -2.54 -2.45 10.46 44.16 46.42 92.46 63.64 66.64 2016 105.82 58.63 28.24 29.09 6.18 24.03 29.94 42.39 72.70 81.84 78.81 141.20 2017 83.11 50.23 56.28 6.22 9.01 9.02 19.93 52.49 51.46 75.51 114.01 129.59 2018 85.73 38.56 48.34 32.05 - - - - - - - - Total Net Basin Supply to Lake (mm) 2013 29.16 34.00 32.40 191.54 138.34 85.08 50.65 42.92 -4.75 59.38 -3.05 -44.53 2014 -5.78 18.61 43.41 142.81 116.89 80.64 109.75 74.32 64.13 38.59 -12.10 -2.68 2015 -26.54 -16.78 30.65 74.42 92.13 126.40 44.32 34.10 42.21 -19.60 19.85 36.39 2016 -28.83 27.35 131.89 78.96 74.89 32.13 42.72 81.05 7.21 -5.03 -21.19 -61.24 2017 27.51 34.38 54.01 159.22 104.34 149.32 66.01 26.36 2.59 70.80 -7.69 -51.10 2018 21.29 69.81 20.31 107.19 - - - - - - - - Average Over-Land Air Temperature (C) 2013 -3.50 -5.29 -1.33 5.21 14.28 18.02 20.88 19.54 15.76 10.31 2.08 -5.91 2014 -9.56 -9.96 -5.10 5.82 13.19 18.93 18.72 19.04 15.44 9.49 0.60 -0.97 2015 -7.85 -12.64 -1.64 6.32 15.08 17.25 20.16 19.74 18.61 10.07 6.11 3.16 2016 -4.23 -2.94 2.54 4.65 13.61 18.30 21.83 22.08 17.92 11.47 6.66 -2.41 2017 -2.68 -0.39 -0.53 9.23 12.20 18.72 20.46 18.92 17.34 12.43 2.39 -5.43 2018 -5.84 -3.66 -1.22 2.32 - - - - - - - - Average Lake Surface Temperature (C) 2013 4.25 0.76 1.13 2.12 3.69 10.15 17.40 19.20 17.32 13.48 8.61 5.37 2014 0.67 0.00 0.00 0.00 1.67 4.61 12.30 17.12 16.18 11.64 7.51 4.89 2015 0.70 0.00 0.00 0.56 2.71 7.58 16.04 19.35 18.24 12.68 9.31 7.18 2016 5.03 2.04 2.37 3.05 6.98 14.48 19.47 21.65 19.38 14.35 10.38 7.34 2017 4.86 2.40 1.92 3.33 7.33 13.84 18.54 19.85 17.54 14.56 9.43 6.44 2018 2.34 0.43 1.68 2.10 - - - - - - - - Average Over-Lake Air Temperature (C) 2013 -0.83 -3.20 -0.52 3.03 7.21 12.61 18.37 19.24 16.49 12.07 4.93 -1.62 2014 -6.29 -8.04 -4.93 2.17 5.70 9.32 14.52 17.72 15.75 10.62 3.52 1.26 2015 -5.20 -10.27 -2.22 2.72 6.86 10.68 17.38 19.28 18.38 11.32 7.56 4.85 2016 -0.78 -1.56 1.56 2.85 9.13 15.37 20.04 21.73 18.93 12.88 8.37 1.72 2017 0.35 0.12 -0.39 5.10 8.84 15.13 19.02 19.47 17.36 13.57 5.52 -0.63 2018 -2.95 -2.74 -0.33 1.68 - - - - - - - - Average Over-Lake Vapor Pressure (mb) 2013 4.45 3.77 4.50 6.04 8.35 12.72 17.84 18.38 14.77 11.17 6.34 4.01 2014 3.00 2.55 3.29 5.60 7.76 10.18 14.34 17.77 14.96 10.46 5.88 5.22 2015 3.08 2.04 3.94 5.86 8.39 11.36 16.67 18.73 17.45 10.05 8.15 7.03 2016 4.27 4.28 5.54 5.63 9.25 13.47 19.04 21.42 17.27 11.81 8.65 5.02 2017 5.02 4.82 4.54 7.16 9.33 14.51 18.76 18.62 16.08 12.22 6.44 4.27 2018 3.90 3.94 4.28 5.11 - - - - - - - - Average Over-Lake Wind Speed (m/s) 2013 7.11 6.71 5.95 5.53 4.13 3.55 3.73 3.98 5.02 5.79 7.82 7.41 2014 7.87 6.13 5.61 4.89 4.15 3.93 3.87 3.84 4.84 6.05 7.59 6.63 2015 7.41 6.88 5.67 4.83 4.25 3.87 3.74 4.64 4.62 6.60 6.36 6.91 2016 7.41 7.15 5.56 5.31 4.05 4.23 4.17 4.36 5.22 5.87 6.43 8.32 2017 6.86 6.71 6.61 4.94 4.36 4.04 3.96 4.73 4.51 6.02 7.33 7.53 2018 7.31 6.19 6.49 5.79 - - - - - - - - Average Over-Lake Cloud Cover (%) 2013 87.65 90.71 84.29 80.83 41.97 51.83 42.68 38.55 47.73 59.06 73.43 80.19 2014 76.42 63.61 55.71 61.43 52.29 44.73 49.48 49.71 49.33 74.45 82.53 78.52 2015 65.06 53.82 42.06 49.23 44.23 40.10 29.16 46.48 37.33 54.42 53.03 76.81 2016 75.23 72.34 64.45 52.03 38.45 34.20 37.94 39.13 41.13 61.65 51.10 79.61 2017 80.61 68.89 63.61 57.80 53.42 51.10 43.42 49.74 37.07 52.65 74.70 76.23 2018 69.74 64.18 48.84 57.00 - - - - - - - - Average Lake Surface Incident SW Radiation (w/m2) 2013 43.50 66.72 110.36 150.62 274.50 259.72 274.22 246.23 174.09 110.10 54.45 38.26 2014 51.61 97.11 156.37 191.29 250.55 278.01 256.85 223.54 172.33 90.29 48.99 39.27 2015 59.46 108.92 178.50 217.93 269.49 289.95 307.06 230.48 191.94 114.39 69.86 40.17 2016 51.99 88.60 143.21 212.52 284.66 305.28 285.46 245.93 187.35 106.35 71.34 38.39 2017 47.48 92.31 143.32 199.33 246.62 261.61 271.33 222.62 192.73 117.85 53.66 40.63 2018 55.57 96.83 168.83 202.17 - - - - - - - - Average Lake Surface Reflection (w/m2) 2013 -4.35 -6.67 -11.04 -15.06 -27.45 -25.97 -27.42 -24.62 -17.41 -11.01 -5.45 -3.83 2014 -7.31 -29.13 -52.79 -46.50 -25.33 -27.80 -25.68 -22.35 -17.23 -9.03 -4.90 -3.93 2015 -8.06 -28.94 -53.61 -32.10 -26.95 -28.99 -30.71 -23.05 -19.19 -11.44 -6.99 -4.02 2016 -5.20 -8.86 -14.32 -21.25 -28.47 -30.53 -28.55 -24.59 -18.73 -10.63 -7.13 -3.84 2017 -4.75 -9.23 -14.33 -19.93 -24.66 -26.16 -27.13 -22.26 -19.27 -11.78 -5.37 -4.06 2018 -5.56 -10.84 -16.88 -20.22 - - - - - - - - Average Lake Surface Net Long Wave Radiation (w/m2) 2013 -99.54 -93.99 -84.28 -69.71 -60.78 -50.70 -48.03 -53.54 -65.95 -74.88 -94.34 -111.18 2014 -109.39 -112.74 -101.82 -69.33 -56.99 -48.79 -48.21 -47.58 -62.12 -69.71 -94.14 -93.42 2015 -108.48 -123.18 -94.87 -71.65 -56.85 -54.21 -53.37 -50.64 -56.30 -79.52 -85.11 -83.61 2016 -106.50 -95.47 -81.99 -83.17 -66.26 -63.67 -49.13 -45.17 -59.54 -72.89 -85.83 -104.36 2017 -96.91 -89.94 -91.71 -68.06 -64.63 -52.45 -47.84 -51.73 -62.00 -72.02 -95.56 -112.42 2018 -104.10 -95.17 -94.68 -84.25 - - - - - - - - Average Lake Surface Latent Heat Flux (w/m2) 2013 -82.22 -50.55 -35.03 -18.08 -0.55 0.41 -18.05 -31.52 -65.57 -67.11 -110.51 -108.88 2014 -78.04 -35.23 -22.82 -5.61 2.43 3.98 -1.01 -16.70 -45.37 -55.80 -101.82 -67.00 2015 -73.70 -52.31 -21.68 -5.21 2.37 2.35 -9.61 -40.49 -44.04 -85.25 -60.88 -61.81 2016 -98.33 -58.41 -26.32 -28.00 -5.74 -22.87 -27.44 -38.78 -68.88 -75.42 -75.32 -130.93 2017 -77.24 -51.79 -52.46 -5.98 -8.37 -8.59 -18.28 -48.11 -48.84 -69.58 -109.02 -120.28 2018 -79.81 -39.87 -45.07 -30.87 - - - - - - - - Average Lake Surface Sensible Heat Flux (w/m2) 2013 -65.81 -45.93 -20.60 -0.26 6.06 4.29 0.89 -1.00 -8.51 -15.99 -51.83 -91.93 2014 -91.06 -36.55 -15.53 6.61 7.34 6.61 4.91 0.46 -6.06 -12.36 -57.16 -43.11 2015 -76.45 -66.67 -8.12 6.90 7.82 5.80 3.44 -2.06 -2.50 -16.43 -19.82 -29.73 2016 -77.37 -48.54 -12.17 -10.87 4.53 2.29 1.52 -0.48 -5.20 -17.14 -27.03 -85.30 2017 -59.15 -34.57 -35.07 6.15 4.83 3.71 1.24 -3.29 -5.09 -13.42 -47.82 -93.63 2018 -79.29 -34.29 -21.96 -11.45 - - - - - - - - Average Lake Surface Net Surface Flux (w/m2) 2013 -209.04 -130.49 -40.66 47.45 191.78 187.75 181.03 134.53 14.67 -60.35 -209.27 -278.56 2014 -234.31 -116.49 -36.53 76.46 178.01 212.05 186.82 136.87 40.29 -57.72 -210.32 -168.76 2015 -207.36 -162.12 0.25 115.86 195.89 214.92 216.53 112.92 68.57 -80.17 -103.88 -139.75 2016 -236.27 -122.88 8.31 69.10 188.67 189.94 180.96 135.48 32.72 -71.53 -125.28 -287.67 2017 -191.22 -93.46 -50.42 111.47 153.70 177.91 178.73 95.61 56.07 -50.63 -205.85 -291.06 2018 -213.62 -83.35 -9.88 55.28 - - - - - - - - Average Lake-Ice Surface Temperature (C) 2013 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2014 -4.40 -9.03 -5.58 -0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2015 -4.05 -11.87 -2.95 -0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2016 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2017 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2018 0.00 -2.19 0.00 0.00 - - - - - - - - Average Lake Ice Cover (%) 2013 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2014 9.88 56.61 68.06 40.34 0.43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2015 9.16 45.32 57.55 14.56 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2016 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2017 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2018 0.00 3.18 0.00 0.00 - - - - - - - - End-of-Month Lake Heat Storage (cal/10e17) 2013 99.17 68.54 57.99 69.93 119.78 167.02 214.06 249.04 252.67 236.95 184.30 111.88 2014 61.56 50.20 43.09 34.90 77.73 131.08 179.64 215.21 225.33 210.30 157.39 113.52 2015 63.57 47.13 38.77 49.03 99.96 154.03 210.31 239.62 256.84 235.96 209.82 173.49 2016 112.07 82.19 84.36 101.74 150.79 198.57 245.62 280.82 288.93 270.29 238.76 163.98 2017 114.27 92.33 79.25 107.30 147.25 192.01 238.47 263.28 277.33 264.11 212.32 136.66 2018 81.14 61.48 58.91 72.82 - - - - - - - - End-of-Month Basin Soil Moisture (cm) 2013 5.86 4.91 4.93 5.66 2.65 0.86 0.62 0.29 0.56 3.54 4.22 3.56 2014 3.60 3.06 4.58 6.21 2.36 0.78 0.87 0.81 1.42 2.69 4.63 4.44 2015 3.12 1.94 3.51 2.69 1.97 0.96 0.21 0.43 0.47 2.21 3.35 4.04 2016 4.42 5.44 7.70 5.18 1.59 0.52 0.25 0.38 0.82 1.27 2.38 3.55 2017 5.00 5.63 6.05 4.94 2.27 1.53 0.60 0.60 0.56 3.40 4.39 3.40 2018 4.81 5.87 4.55 6.12 - - - - - - - - End-of-Month Basin Groundwater Moisture (cm) 2013 1.13 1.50 1.68 1.84 1.42 1.09 0.87 0.71 0.61 0.60 0.83 0.99 2014 1.16 1.19 1.37 1.49 1.32 1.03 0.84 0.71 0.63 0.60 0.71 0.94 2015 1.10 1.08 1.08 1.08 0.88 0.74 0.62 0.52 0.45 0.42 0.50 0.70 2016 0.99 1.29 1.46 1.64 1.41 1.12 0.91 0.76 0.65 0.59 0.57 0.78 2017 1.22 1.45 1.64 1.60 1.38 1.10 0.90 0.75 0.65 0.65 0.98 1.10 2018 1.26 1.50 1.65 1.85 - - - - - - - - End-of-Month Basin Surface Moisture (cm) 2013 1.72 0.60 0.63 1.10 0.72 0.20 0.18 0.12 0.17 0.84 0.39 0.31 2014 0.35 0.43 0.62 0.93 0.34 0.19 0.25 0.14 0.30 0.28 0.68 0.50 2015 0.28 0.21 0.40 0.34 0.41 0.26 0.10 0.10 0.15 0.42 0.45 0.59 2016 0.67 0.79 1.95 0.53 0.26 0.14 0.12 0.17 0.21 0.25 0.42 0.59 2017 0.50 0.77 0.94 0.89 0.32 0.44 0.16 0.12 0.12 0.75 0.50 0.32 2018 0.67 1.33 0.60 0.76 - - - - - - - - End-of-Month Basin Snow Pack (cm) 2013 0.92 2.39 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.47 2.79 2014 3.25 4.41 1.80 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.11 2015 2.02 3.89 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 1.14 2016 1.97 0.77 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.73 2017 0.66 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.17 2018 1.90 0.14 0.21 0.00 - - - - - - - - End-of-Month Basin Total Moisture (cm) 2013 9.63 9.40 7.34 8.60 4.79 2.15 1.67 1.12 1.34 4.98 5.91 7.65 2014 8.36 9.09 8.37 8.63 4.02 2.00 1.96 1.66 2.35 3.57 6.08 5.99 2015 6.52 7.12 5.13 4.11 3.26 1.96 0.93 1.05 1.07 3.05 4.31 6.47 2016 8.05 8.29 11.11 7.35 3.26 1.78 1.28 1.31 1.68 2.11 3.37 5.65 2017 7.38 7.96 8.63 7.43 3.97 3.07 1.66 1.47 1.33 4.80 5.87 7.99 2018 8.64 8.84 7.01 8.73 - 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