WETS Station : POTOMAC FILTER PLANT, MD7272 Creation Date: 09/05/2002 Latitude: 3902 Longitude: 07715 Elevation: 270 State FIPS/County(FIPS): 24031 County Name: Montgomery Start yr. - 1971 End yr. - 2000 -------------------------------------------------------------------------| | Temperature | Precipitation | | (Degrees F.) | (Inches) | |-----------------------|--------------------------------------| | | | | | 30% chance |avg | | | | | | | will have |# of| avg | |-------|-------|-------| |-----------------|days| total| Month | avg | avg | avg | avg | less | more |w/.1| snow | | daily | daily | | | than | than | or| fall | | max | min | | | | |more| | -------------------------------------------------------------------------| January | 33.9 | 24.1 | 29.0 | 2.99 | 2.01 | 3.58 | 6 | 3.8 | February | ----- | ----- | ----- | 2.59 | 1.56 | 3.14 | 5 | 2.6 | March | 55.6 | 32.7 | 44.1 | 3.43 | 2.32 | 4.09 | 6 | 0.4 | April | 62.1 | 42.8 | 52.4 | 3.22 | 2.09 | 3.87 | 6 | 0.0 | May | 75.7 | 50.6 | 63.2 | 3.77 | 2.62 | 4.48 | 7 | 0.0 | June | ----- | ----- | ----- | 3.65 | 2.36 | 4.40 | 6 | 0.0 | July | 87.4 | 67.5 | 77.4 | 3.53 | 2.17 | 4.28 | 6 | 0.0 | August | ----- | ----- | ----- | 3.43 | 2.26 | 4.12 | 5 | 0.0 | September | ----- | ----- | ----- | 4.27 | 2.79 | 5.13 | 6 | 0.0 | October | ----- | ----- | ----- | 3.13 | 1.62 | 3.82 | 5 | 0.0 | November | ----- | ----- | ----- | 3.24 | 1.93 | 3.93 | 5 | 0.2 | December | 48.3 | 34.3 | 41.3 | 3.12 | 1.99 | 3.76 | 5 | 1.1 | ----------|-------|-------|-------|--------|--------|--------|----|------| ----------|-------|-------|-------|--------|--------|--------|----|------| Annual | ----- | ----- | ----- | ------ | 34.84 | 42.54 | -- | ---- | ----------|-------|-------|-------|--------|--------|--------|----|------| Average | 30.2 | 21.0 | 25.6 | ------ | ------ | ------ | -- | ---- | ----------|-------|-------|-------|--------|--------|--------|----|------| Total | ----- | ----- | ----- | 40.37 | ------ | ------ | 68 | 8.1 | ----------|-------|-------|-------|--------|--------|--------|----|------| -------------------------------------------------------------------------| GROWING SEASON DATES --------------------------------------------------------------------------- | Temperature ---------------------|----------------------------------------------------- Probability | 24 F or higher | 28 F or higher | 32 F or higher | ---------------------|-----------------|-----------------|----------------- | Beginning and Ending Dates | Growing Season Length | 50 percent * | ---------- | ---------- | ---------- | ------ | ------ | ------ | | | 70 percent * | ---------- | ---------- | ---------- | ------ | ------ | ------ | | | --------------------------------------------------------------------------- * Percent chance of the growing season occurring between the Beginning and Ending dates. total 1962-2002 prcp Station : MD7272, POTOMAC FILTER PLANT ------- Unit = inches yr jan feb mar apr may jun jul aug sep oct nov dec annl ------- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- 62 3.23 3.91 2.33 0.14 1.81 0.86 5.53 2.43 20.24 63 1.45 M0.26 4.30 0.73 0.85 6.90 0.71 6.10 3.49 0.00 7.00 1.93 33.72 64 4.19 2.01 2.63 4.41 1.54 1.31 1.99 2.81 3.04 1.42 1.77 3.33 30.45 65 2.35 2.57 4.65 1.93 1.42 1.84 3.00 4.62 2.87 2.50 0.57 0.37 28.69 66 3.51 2.45 1.98 M3.62 4.35 1.76 2.69 1.19 11.11 1.63 1.81 36.10 67 0.94 2.02 1.17 1.95 2.15 3.67 8.35 0.34 2.46 2.73 6.10 31.88 68 2.16 0.21 3.60 4.87 5.18 3.40 2.65 5.31 2.80 2.27 2.25 34.70 69 1.42 1.68 0.68 0.96 3.15 4.50 3.50 5.57 4.40 1.02 1.68 3.06 31.62 70 0.81 2.59 2.43 4.27 3.56 2.85 2.32 1.12 2.71 M1.88 24.54 71 2.16 5.05 1.08 1.54 6.37 1.57 2.48 4.51 4.79 5.68 4.58 1.10 40.91 72M3.03 5.32 2.50 4.95 4.89 12.81 2.87 M3.66 1.29 M2.73 5.68 49.73 73 2.10 2.35 2.30 7.10 3.55 4.52 4.58 3.19 5.23 2.01 0.78 6.29 44.00 74M2.74 1.05 3.37 2.38 3.26 4.58 0.82 2.73 4.52 0.65 2.17 5.62 33.89 75 2.19 2.10 4.38 2.47 3.55 4.35 7.06 3.43 8.03 2.24 1.32 4.60 45.72 76 2.99 1.13 2.70 1.38 3.94 2.59 4.64 1.91 5.14 7.80 0.60 2.02 36.84 77 1.35 0.52 3.62 2.54 1.18 4.31 4.35 4.21 5.75 4.10 31.93 78 7.08 0.25 3.10 0.82 4.84 2.58 4.91 5.60 0.96 3.11 M2.77 36.02 79 6.73 5.52 2.79 1.95 2.51 5.56 6.10 10.33 8.73 7.27 2.68 1.01 61.18 80 2.45 1.50 5.29 4.22 4.11 1.36 2.53 2.37 1.92 2.21 3.79 0.92 32.67 81 0.35 3.26 0.90 2.96 4.10 3.52 3.85 4.03 2.30 2.93 0.24 2.88 31.32 82 2.48 M4.02 3.11 3.79 2.43 5.43 2.53 1.93 5.26 2.22 1.52 34.72 83 1.33 2.43 4.01 7.69 4.67 4.11 1.49 2.30 2.47 5.76 6.11 42.37 84M1.49 3.69 5.50 3.83 4.69 1.72 3.14 2.78 2.41 3.14 M1.21 33.60 85 3.34 2.09 0.32 4.02 1.23 5.45 2.09 3.62 3.61 4.40 1.50 31.67 86 2.05 3.49 0.88 3.44 2.21 1.07 2.16 2.58 0.98 1.82 5.21 5.56 31.45 87 3.83 2.23 1.02 3.34 2.46 5.30 1.94 1.43 8.42 2.05 4.73 2.25 39.00 88 2.21 2.02 1.72 2.58 8.94 1.03 5.93 3.20 2.76 1.60 4.61 1.02 37.62 89M1.82 M1.72 3.10 2.26 7.25 5.13 3.61 M0.47 2.89 4.85 2.82 1.14 37.06 90 2.71 1.76 2.70 3.91 5.11 3.24 6.26 2.05 6.44 4.44 38.62 91 2.84 0.66 4.73 1.92 1.05 1.95 2.68 1.47 2.88 1.54 2.41 4.51 28.64 92 1.97 2.01 M3.76 3.09 4.62 2.94 M5.39 1.73 4.24 2.46 4.68 3.95 40.84 93 2.75 M2.20 7.12 5.20 1.29 2.08 0.93 5.11 3.11 3.13 5.52 4.03 42.47 94 3.02 3.20 6.85 2.71 2.89 M3.59 6.70 6.13 3.07 0.66 2.41 2.07 43.30 95 3.12 0.98 1.51 1.20 3.76 3.08 2.34 2.33 3.44 3.90 2.15 27.81 96M6.19 M2.00 3.98 4.19 5.96 6.49 6.53 3.56 7.56 5.22 4.27 6.00 61.95 97M2.36 M2.21 5.33 2.32 1.29 3.72 M0.34 2.89 4.72 2.81 M6.53 2.25 36.77 98 5.81 6.58 5.77 3.42 3.94 3.99 1.19 1.59 1.65 1.54 1.19 1.77 38.44 99 5.11 2.54 3.87 2.59 1.95 1.43 1.59 5.14 10.69 3.10 1.77 3.07 42.85 0 2.51 2.27 3.72 6.40 2.25 4.33 4.35 4.71 5.31 0.04 1.67 2.14 39.70 1 2.69 M2.57 4.81 M2.10 M6.07 5.63 M4.30 4.59 2.77 1.39 1.08 1.99 39.99 2 ---------- WETS Station : ROCKVILLE 1 NE, MD7705 Creation Date: 09/05/2002 Latitude: 3906 Longitude: 07706 Elevation: 440 State FIPS/County(FIPS): 24031 County Name: Montgomery Start yr. - 1971 End yr. - 2000 -------------------------------------------------------------------------| | Temperature | Precipitation | | (Degrees F.) | (Inches) | |-----------------------|--------------------------------------| | | | | | 30% chance |avg | | | | | | | will have |# of| avg | |-------|-------|-------| |-----------------|days| total| Month | avg | avg | avg | avg | less | more |w/.1| snow | | daily | daily | | | than | than | or| fall | | max | min | | | | |more| | -------------------------------------------------------------------------| January | 42.0 | 23.9 | 32.9 | 3.42 | 2.25 | 4.10 | 6 | 7.5 | February | 45.7 | 25.7 | 35.7 | 2.85 | 1.75 | 3.44 | 5 | 4.3 | March | 55.6 | 33.6 | 44.6 | 3.92 | 2.83 | 4.62 | 7 | 2.6 | April | 66.7 | 42.4 | 54.6 | 3.06 | 2.17 | 3.63 | 6 | 0.1 | May | 75.1 | 51.8 | 63.4 | 4.35 | 3.09 | 5.16 | 8 | 0.0 | June | 82.7 | 60.4 | 71.5 | 3.73 | 2.29 | 4.51 | 6 | 0.0 | July | 86.7 | 65.2 | 76.0 | 4.00 | 2.56 | 4.82 | 6 | 0.0 | August | 84.4 | 63.3 | 73.8 | 3.77 | 2.23 | 4.58 | 5 | 0.0 | September | 77.6 | 56.4 | 67.0 | 4.17 | 2.09 | 5.09 | 5 | 0.0 | October | 67.2 | 44.3 | 55.7 | 3.29 | 1.92 | 4.00 | 4 | 0.0 | November | 56.2 | 35.6 | 45.9 | 3.50 | 2.31 | 4.20 | 5 | 0.6 | December | 46.4 | 28.2 | 37.3 | 3.07 | 1.96 | 3.70 | 5 | 1.8 | ----------|-------|-------|-------|--------|--------|--------|----|------| ----------|-------|-------|-------|--------|--------|--------|----|------| Annual | ----- | ----- | ----- | ------ | 32.23 | 47.98 | -- | ---- | ----------|-------|-------|-------|--------|--------|--------|----|------| Average | 65.5 | 44.2 | 54.9 | ------ | ------ | ------ | -- | ---- | ----------|-------|-------|-------|--------|--------|--------|----|------| Total | ----- | ----- | ----- | 43.12 | ------ | ------ | 68 | 16.8 | ----------|-------|-------|-------|--------|--------|--------|----|------| -------------------------------------------------------------------------| GROWING SEASON DATES --------------------------------------------------------------------------- | Temperature ---------------------|----------------------------------------------------- Probability | 24 F or higher | 28 F or higher | 32 F or higher | ---------------------|-----------------|-----------------|----------------- | Beginning and Ending Dates | Growing Season Length | 50 percent * | 3/23 to 11/16 | 4/ 2 to 10/31 | 4/13 to 10/21 | 238 days | 213 days | 191 days | | | 70 percent * | 3/14 to 11/24 | 3/26 to 11/ 7 | 4/ 6 to 10/28 | 255 days | 225 days | 205 days | | | --------------------------------------------------------------------------- * Percent chance of the growing season occurring between the Beginning and Ending dates. total 1948-2002 prcp Station : MD7705, ROCKVILLE 1 NE ------- Unit = inches yr jan feb mar apr may jun jul aug sep oct nov dec annl ------- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- 48 5.45 1.94 3.13 6.73 5.29 22.54 49M4.07 2.24 3.79 2.96 7.00 3.97 6.38 3.35 3.32 3.62 1.16 2.45 44.31 50 2.09 3.12 3.94 1.20 6.29 4.76 3.83 3.19 5.85 2.69 2.69 3.25 42.90 51 2.38 2.48 2.39 3.25 2.17 11.34 1.28 0.85 1.52 1.39 4.89 M3.64 37.58 52 4.51 1.37 3.71 6.71 4.96 3.50 5.26 6.18 5.11 0.82 7.34 2.82 52.29 53 3.87 1.41 6.98 4.63 8.54 1.77 3.24 4.14 4.11 2.63 2.15 3.88 47.35 54 1.50 M0.73 M2.30 M3.23 2.60 1.84 1.94 4.09 0.94 3.39 1.48 M2.04 26.08 55 0.62 M3.50 3.77 2.89 M1.17 2.51 4.18 10.41 1.02 4.43 1.91 0.30 36.71 56M1.82 3.80 3.47 1.81 1.65 1.78 5.49 1.89 4.59 3.39 1.49 2.66 33.84 57 2.55 2.28 3.28 2.87 2.69 4.58 1.30 2.33 3.62 2.17 2.19 4.33 34.19 58M3.18 5.08 3.31 3.94 3.64 5.51 7.91 4.39 1.16 2.02 2.32 1.36 43.82 59 2.47 2.00 2.55 3.59 3.06 2.62 3.06 2.80 2.62 4.78 3.65 2.82 36.02 60 2.47 3.69 2.26 3.30 7.50 3.10 5.59 5.64 4.71 1.02 1.94 2.30 43.52 61M3.07 M3.02 3.54 3.91 3.52 5.03 2.28 5.29 0.97 2.76 2.29 M3.06 38.74 62 3.47 M3.81 3.37 3.19 2.30 2.87 2.19 0.20 1.50 1.72 3.77 2.73 31.12 63 1.06 1.56 4.86 1.10 M2.24 0.94 5.65 3.24 0.00 7.81 2.16 30.62 64 4.27 3.26 2.50 3.94 M0.01 1.23 1.40 3.02 3.38 1.58 2.44 3.18 30.21 65M2.36 2.34 M2.04 2.12 2.00 2.62 1.88 5.32 2.67 2.96 M0.47 0.51 27.29 66 3.93 M0.05 0.59 M1.31 3.07 1.48 1.54 1.08 1.69 3.01 17.75 67 1.01 2.58 M3.90 1.30 3.65 1.14 3.72 6.53 0.42 2.03 2.33 M3.24 31.85 68 1.34 0.38 3.67 1.10 4.88 2.41 1.16 3.55 3.53 2.09 24.11 69 1.19 2.22 1.70 2.06 1.61 2.83 M2.06 M0.10 M0.17 13.94 70 4.53 M3.78 5.11 7.38 M4.21 2.04 3.59 4.99 2.55 38.18 71 2.36 6.05 2.12 2.82 7.67 1.43 3.35 9.02 3.18 6.27 4.34 1.31 49.92 72 2.78 6.31 3.18 4.96 6.55 14.72 4.09 3.22 1.30 3.62 7.11 6.39 64.23 73 2.94 3.74 3.36 7.62 4.16 3.88 7.60 3.26 4.77 2.27 0.98 6.05 50.63 74 3.69 1.66 4.52 2.75 3.01 8.42 0.96 5.99 7.42 1.12 2.00 5.40 46.94 75 3.89 3.01 5.33 2.81 4.63 3.61 9.79 2.78 10.45 3.33 2.00 3.13 54.76 76 4.64 1.65 2.40 1.30 4.37 2.66 5.69 3.27 3.92 7.22 0.73 M1.52 39.37 77 0.83 0.62 4.37 3.07 0.97 2.69 3.95 3.81 0.50 5.32 5.04 4.44 35.61 78 7.76 0.25 4.24 1.22 6.56 2.87 3.51 9.58 0.70 1.27 2.83 4.80 45.59 79 8.17 6.05 3.32 2.77 3.90 M5.82 4.45 8.37 11.37 M6.85 2.92 1.12 65.11 80 2.38 0.98 6.14 4.05 5.88 3.62 4.02 2.40 1.94 2.66 3.46 0.98 38.51 81 0.30 4.45 1.33 2.59 4.25 3.95 4.64 2.23 0.68 2.51 M0.39 1.61 28.93 82 3.28 1.78 3.42 2.65 2.59 4.96 2.66 0.78 3.79 2.17 1.34 1.75 31.17 83 1.18 2.65 M3.17 7.00 84 5.89 4.15 5.28 0.67 3.57 6.29 1.35 3.03 3.09 1.76 35.08 85 1.86 3.38 2.46 0.35 4.71 2.41 6.04 2.01 4.04 3.29 5.58 1.00 37.13 86 2.17 3.79 1.10 3.29 3.22 1.31 2.56 3.06 1.01 2.77 5.69 5.38 35.35 87 3.99 1.80 3.11 2.67 3.29 1.55 2.09 10.00 2.82 4.29 2.34 37.95 88 2.56 2.80 2.29 3.37 8.38 1.19 5.56 2.80 2.90 1.58 4.84 1.16 39.43 89 3.12 2.77 5.32 2.97 8.92 5.48 4.82 0.33 3.17 5.82 2.86 1.59 47.17 90 3.56 2.14 2.89 4.13 5.24 3.03 4.65 6.44 1.29 6.64 3.00 5.50 48.51 91 3.03 0.84 5.74 1.99 1.37 3.75 3.65 1.85 3.81 1.46 2.34 4.47 34.30 92 2.55 2.39 3.72 2.51 4.94 2.17 4.83 1.80 4.86 1.89 M5.31 4.55 41.52 93 2.44 2.26 8.02 M5.50 2.25 M1.87 1.67 3.68 2.62 2.35 6.24 4.16 43.06 94M4.37 4.06 7.09 2.26 M3.26 1.91 5.61 6.25 3.71 0.92 1.96 2.26 43.66 95 3.95 1.94 1.68 1.83 4.44 2.82 3.24 3.94 3.06 5.83 5.00 2.24 39.97 96 5.70 2.00 4.00 3.59 5.16 6.41 5.02 2.99 10.81 4.94 4.43 5.78 60.83 97 2.68 2.00 5.09 1.95 3.55 3.70 0.36 2.70 2.11 2.64 5.81 1.92 34.51 98M3.56 5.21 5.10 2.81 4.31 4.55 1.82 0.80 1.33 1.72 1.07 1.48 33.76 99 5.77 2.65 3.95 2.44 1.66 1.29 1.07 4.57 10.01 2.94 1.93 2.83 41.11 0 3.63 2.23 3.67 4.02 2.32 M3.62 5.38 3.05 4.80 0.12 1.74 2.10 36.68 1 2.76 2.27 4.05 1.98 4.93 5.68 4.00 5.46 2.21 0.74 1.29 1.77 37.14 2 ----------