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Stanislaus River Flow and Temperature


This page provides data, based on NMFS 2019, of current and historical river flow and water temperature conditions for fish using only observed data. Actual pre-season and in-season management are complex processes employing multiple sources of observed data, models, and forecasts. For further information, see the Temperature Threshold section.

View Data for: Note: Years prior to 2019 pre-date the BiOp and are provided for historical perspective on conditions.
graph Water Year 2023 River Flow and Water Temp (F)

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Note: Years prior to 2019 pre-date the BiOp and are provided for historical perspective on conditions.
Water Year 2023 Stanislaus River Flow and Temperature Data Table
Year Month Day Stanislaus at Orange Blossom Bridge (OBB)
Water Temperature (F)
Goodwin Dam downstream (USGS 11302000)
Water Temperature (F)
Stanislaus at Ripon (RIP)
Water Temperature (F)
Goodwin Dam (GDW)
Spillway Discharge (CFS)
Stanislaus at Koetitz Ranch (KOT)
River Discharge (CFS)
2023 06 07 51.13   55.60   1395.83
2023 06 06 52.00 49.64 56.78   1401.54
2023 06 05 52.30 50.08 57.44 1501.00 1434.96
2023 06 04 52.56 50.24 57.28 1504.00 1461.63
2023 06 03 52.41 50.21 56.55 1504.00 1387.00
2023 06 02 51.96 49.97 56.31 1513.00 1408.92
2023 06 01 51.85 49.75 56.11 1504.00 1403.63
2023 05 31 51.80 49.72 56.11 1508.00 1399.04
2023 05 30 51.76 49.64 55.93 1507.00 1417.67
2023 05 29 51.79 49.68 55.23 1505.00 1464.71
2023 05 28 51.49 49.68 55.79 1506.00 1465.54
2023 05 27 51.94 49.75 56.10 1504.00 1430.46
2023 05 26 51.84 49.78 55.91 1503.00 1432.42
2023 05 25 51.53 49.66 55.80 1503.00 1432.30
2023 05 24 51.64 49.65 55.70 1501.00 1414.42
2023 05 23 51.45 49.55 56.53 1506.00 1428.13
2023 05 22 51.82 49.57 56.63 1505.00 1448.83
2023 05 21 51.68 49.45 56.43 2890.00 1396.00
2023 05 20 51.72 49.44 56.35 1500.00 1396.79
2023 05 19 51.51 49.29 56.31 1504.00 1341.29
2023 05 18 51.58 49.27 56.50 1507.00 1313.67
2023 05 17 51.70 49.42 56.57 1500.00 1322.92
2023 05 16 51.76 49.42 56.64 1506.00 1374.54
2023 05 15 51.80 49.47 56.60 1502.00 1376.46
2023 05 14 51.82 49.51 56.48 1506.00 1390.46
2023 05 13 51.65 49.47 55.95 1503.00 1413.00
2023 05 12 51.40 49.37 55.24 1502.00 1446.96
2023 05 11 51.12 49.25 54.60 1504.00 1505.67
2023 05 10 51.04 49.21 54.34 1505.00 1480.71
2023 05 09 50.89 49.19 54.33 1502.00 1407.96
2023 05 08 50.91 49.17 53.86 1505.00 1375.88
2023 05 07 50.53 48.96 53.25 1502.00 1151.17
2023 05 06 50.74 48.80 57.47 1506.00 685.88
2023 05 05 53.04 49.37 56.76 483.00 674.67
2023 05 04 52.38 49.21 54.57 304.00 772.83
2023 05 03 51.10 49.12 52.41 310.00 1253.38
2023 05 02 50.24 49.02 52.07 881.00 1528.67
2023 05 01 50.43 49.09 53.76 1503.00 1623.13
2023 04 30 51.37 49.42 55.51 1501.00 1645.25
2023 04 29 51.61 49.57 55.78 1505.00 1645.50
2023 04 28 51.53 49.51 55.63 1504.00 1677.71
2023 04 27 51.41 49.41 55.55 1507.00 1662.46
2023 04 26 51.28 49.40 54.88 1502.00 1632.88
2023 04 25 51.02 49.24 54.87 1500.00 1698.71
2023 04 24 51.18 49.14 55.25 1503.00 1704.67
2023 04 23 51.33 49.26 55.22 1501.00 1683.71
2023 04 22 51.05 49.18 54.68 1506.00 1607.50
2023 04 21 50.50 48.88 54.20 1510.00 1372.67
2023 04 20 50.60 48.61 57.24 1503.00 905.29
2023 04 19 52.51 48.96 57.07 482.00 1032.58
2023 04 18 52.50 48.97 56.12 306.00 1228.92
2023 04 17 51.46 48.88 54.80 341.00 1748.50
2023 04 16 50.70 48.99 54.63 1100.00 2178.88
2023 04 15 50.43 48.94 54.09 1500.00 2193.54
2023 04 14 50.18 48.86 53.57 1503.00 2234.54
2023 04 13 50.08 48.84 53.77 1503.00 2214.63
2023 04 12 50.42 48.89 54.33 1506.00 2192.96
2023 04 11 50.73 49.08 55.58 1505.00 2140.21
2023 04 10 50.71 48.94 54.70 1509.00 2110.13
2023 04 09 50.46 48.91 53.85 1502.00 2127.42
2023 04 08 50.20 48.84 52.89 1503.00 2141.50
2023 04 07 49.98 48.69 53.33 1510.00 2152.33
2023 04 06 50.23 48.94 52.62 1503.00 2158.75
2023 04 05 50.01 49.04 51.98 1508.00 2124.75
2023 04 04 49.92 49.17 51.78 1509.00 2119.92
2023 04 03 49.91 48.96 52.59 1508.00 2088.00
2023 04 02 50.20 48.83 53.83 1501.00 1960.75
2023 04 01 50.70 49.06 55.34 1502.00 1571.88
2023 03 31 51.80 49.23 53.17 488.00 1647.38
2023 03 30 50.38 48.72 51.07 316.00 1683.38
2023 03 29 49.53 48.49 49.75 354.00 2081.96
2023 03 28 49.20 48.50 51.50 1027.00 2303.00
2023 03 27 49.65 48.78 51.47 1506.00 2305.50
2023 03 26 49.63 48.76 51.63 1503.00 2318.04
2023 03 25 49.85 48.91 51.82 1514.00 2258.50
2023 03 24 50.05 49.02 51.84 1512.00 2294.21
2023 03 23 50.34 49.05 51.92 1502.00 2334.21
2023 03 22 50.13 49.35 51.42 1505.00 2270.92
2023 03 21 50.22 49.14 52.73 1504.00 2275.00
2023 03 20 51.01 49.69 52.64 1504.00 2301.08
2023 03 19 50.75 49.66 53.15 1505.00 2317.88
2023 03 18 50.98 49.91 53.17 1511.00 2236.17
2023 03 17 51.00 49.85 52.39 1516.00 2115.33
2023 03 16 50.82 49.73 51.89 1511.00 2150.46
2023 03 15 50.96 49.49 53.20 1519.00 2105.46
2023 03 14 51.57 49.31 54.12 1516.00 2093.88
2023 03 13 51.28 49.19 53.34 1512.00 2075.54
2023 03 12 51.21 49.08 52.66 1543.00 1737.96
2023 03 11 50.69 49.15 51.60 1523.00 1577.83
2023 03 10 49.99 48.49 49.57 1243.00 852.38
2023 03 09 48.41 48.11 49.29 764.00 618.67
2023 03 08 49.09 48.34 50.33 740.00 508.88
2023 03 07 49.17 48.38 50.01 501.00 583.46
2023 03 06 48.99 47.98 49.73 506.00 617.83
2023 03 05 49.32 48.25 50.69 510.00 613.71
2023 03 04 49.96 48.76 51.17 501.00 696.17
2023 03 03 49.91 48.92 49.88 504.00 1044.96
2023 03 02 49.29 48.74 48.35 718.00 1580.75
2023 03 01 48.40 49.07 47.51 1444.00 1039.88
2023 02 28 48.00 48.98 47.32 1329.00 520.08
2023 02 27 48.04 48.92 47.93 339.00 439.29
2023 02 26 48.55 49.04 47.93 340.00 506.38
2023 02 25 48.41 48.98 47.38 462.00 372.04
2023 02 24 48.48 49.19 47.81 587.00 228.58
2023 02 23 49.09 49.35 48.65 207.00 218.25
2023 02 22 50.03 49.42 49.91 205.00 238.08
2023 02 21 51.09 50.04 51.51 202.00 218.79
2023 02 20 50.38 50.00 50.42 201.00 218.54
2023 02 19 49.44 49.55 49.52 200.00 224.04
2023 02 18 49.02 49.26 48.52 200.00 225.17
2023 02 17 48.87 49.08 48.21 200.00 227.38
2023 02 16 48.81 49.09 48.27 203.00 229.88
2023 02 15 48.79 49.16 48.98 202.00 233.79
2023 02 14 50.18 49.78 50.80 202.00 250.83
2023 02 13 50.61 49.94 51.47 203.00 239.58
2023 02 12 50.31 49.84 51.32 203.00 242.96
2023 02 11 50.83 49.94 51.41 203.00 244.08
2023 02 10 50.70 50.04 51.23 205.00 246.96
2023 02 09 50.39 49.92 50.62 205.00 253.63
2023 02 08 49.83 49.69 50.25 205.00 256.13
2023 02 07 49.69 49.72 50.30 205.00 266.58
2023 02 06 50.25 49.89 50.54 208.00 264.71
2023 02 05 51.00 50.26 51.44 210.00 263.63
2023 02 04 49.73 49.79 49.31 205.00 274.58
2023 02 03 49.58 49.86 47.99 207.00 290.13
2023 02 02 48.59 49.44 46.91 206.00 307.79
2023 02 01 48.37 49.50 46.58 203.00 320.04
2023 01 31 48.12 49.38 46.95 204.00 332.67
2023 01 30 48.87 49.78 48.29 205.00 348.83
2023 01 29 49.83 50.26 49.27 205.00 366.46
2023 01 28 50.03 50.16 49.85 202.00 402.13
2023 01 27 50.03 50.28 49.44 201.00 488.75
2023 01 26 50.10 50.45 48.95 298.00 528.17
2023 01 25 49.85 50.38 48.47 401.00 547.88
2023 01 24 49.60 50.29 48.15 403.00 576.71
2023 01 23 49.50 50.21 48.18 403.00 617.71
2023 01 22 49.66 50.50 48.47 407.00 676.83
2023 01 21 49.63 50.39 48.69 409.00 782.13
2023 01 20 49.95 50.59 49.65 410.00 987.75
2023 01 19 51.19 51.19 50.73 417.00 1624.29
2023 01 18 51.37 51.24 50.64 738.00 2642.88
2023 01 17 51.77 51.88 50.38 1874.00 2809.17
2023 01 16 51.18 51.86 51.46 1900.00 2316.79
2023 01 15 52.37 52.09 52.55 1987.00 1643.67
2023 01 14 52.71 52.17 53.14 1981.00 782.08
2023 01 13 52.74 52.20 52.70 549.00 912.88
2023 01 12 53.15 52.09 52.15 408.00 1782.42
2023 01 11 52.18 51.91 52.42 992.00 2436.29
2023 01 10 52.70 52.12 53.06 2230.00 1831.25
2023 01 09 52.77 52.12 52.80 2367.00 882.08
2023 01 08 51.96 51.91 51.73 657.00 680.29
2023 01 07 51.93 51.76 51.48 418.00 913.58
2023 01 06 51.80 51.71 51.95 425.00 1146.13
2023 01 05 52.43 52.00 52.05 443.00 1002.08
2023 01 04 51.99 51.92 51.35 417.00 1887.21
2023 01 03 51.99 51.91 50.92 1085.00 2974.83
2023 01 02 51.71 51.85 51.38 2559.00 2871.79
2023 01 01 52.43 51.93 53.35 3123.00 1841.00
2022 12 31 53.68 52.13 52.73 1724.00 1157.58
2022 12 30 51.92 51.91 51.54 934.00 698.54
2022 12 29 51.74 51.77 50.23 770.00 644.42
2022 12 28 51.13 51.70 49.52 570.00 506.88
2022 12 27 51.18 51.67 49.81 301.00 259.17
2022 12 26 50.70 51.34 47.88 203.00 204.75
2022 12 25 50.38 51.25 47.70 203.00 195.75
2022 12 24 49.76 51.20 47.35 201.00 195.63
2022 12 23 49.96 51.25 47.38 203.00 194.63
2022 12 22 50.20 51.33 46.94 202.00 198.96
2022 12 21 49.90 51.25 46.48 202.00 195.50
2022 12 20 49.93 51.30 46.29 202.00 206.46
2022 12 19 49.81 51.36 45.68 202.00 221.25
2022 12 18 49.70 51.41 45.27 202.00 223.25
2022 12 17 49.33 51.72 45.22 202.00 207.25
2022 12 16 49.57 51.84 45.60 202.00 220.54
2022 12 15 49.87 51.94 46.24 202.00 231.46
2022 12 14 49.96 52.17 47.11 202.00 254.17
2022 12 13 50.38 52.48 49.10 200.00 308.00
2022 12 12 52.20 53.07 51.80 206.00 454.92
2022 12 11 52.84 53.46 52.55 213.00 318.21
2022 12 10 53.25 53.68 51.83 228.00 206.88
2022 12 09 52.91 53.47 50.33 204.00 198.67
2022 12 08 51.54 53.10 49.18 202.00 202.33
2022 12 07 52.04 53.37 50.09 201.00 216.13
2022 12 06 53.33 53.89 51.88 203.00 240.75
2022 12 05 53.83 54.26 52.00 209.00 273.79
2022 12 04 54.15 54.44 51.26 219.00 255.46
2022 12 03 52.25 53.96 49.25 207.00 225.71
2022 12 02 51.30 53.38 47.44 203.00 241.29
2022 12 01 52.24 53.85 48.85 211.00 213.29
2022 11 30 51.46 53.80 47.33 204.00 206.29
2022 11 29 51.98 54.01 48.40 205.00 206.50
2022 11 28 52.51 54.35 48.97 203.00 206.04
2022 11 27 52.70 54.52 49.37 202.00 224.54
2022 11 26 53.29 54.72 49.63 202.00 220.21
2022 11 25 53.03 54.81 48.88 202.00 206.46
2022 11 24 52.90 54.86 48.70 202.00 203.13
2022 11 23 52.66 54.79 48.25 202.00 196.88
2022 11 22 52.69 54.82 47.80 202.00 197.50
2022 11 21 52.65 55.01 48.01 202.00 199.08
2022 11 20 52.98 55.21 48.53 202.00 201.38
2022 11 19 53.13 55.43 49.10 202.00 198.75
2022 11 18 53.47 55.60 49.46 202.00 227.21
2022 11 17 53.75 55.83 49.41 202.00 226.13
2022 11 16 53.83 55.93 49.83 202.00 231.25
2022 11 15 53.89 56.09 50.35 202.00 242.17
2022 11 14 54.00 56.33 50.61 202.00 237.38
2022 11 13 54.60 56.47 51.34 201.00 230.33
2022 11 12 54.67 56.56 51.55 202.00 232.17
2022 11 11 54.29 56.56 51.95 204.00 238.75
2022 11 10 54.71 56.41 52.83 204.00 240.75
2022 11 09 55.52 56.78 54.08 205.00 241.29
2022 11 08 56.26 57.19 55.75 209.00 231.08
2022 11 07 57.52 57.62 56.73 209.00 224.96
2022 11 06 57.50 57.88 56.23 202.00 222.17
2022 11 05 55.93 57.28 54.19 202.00 234.25
2022 11 04 55.27 57.09 53.78 202.00 248.00
2022 11 03 56.37 57.23 54.96 204.00 280.25
2022 11 02 56.66 57.43 56.09 204.00 386.08
2022 11 01 57.49 57.89 57.10 256.00 531.25
2022 10 31 58.09 58.14 57.52 429.00 734.00
2022 10 30 58.14 58.23 57.60 791.00 843.67
2022 10 29 58.20 58.21 57.45 1004.00 771.13
2022 10 28 57.93 58.22 56.79 1168.00 565.21
2022 10 27 57.63 58.12 57.06 794.00 412.09
2022 10 26 58.08 58.24 57.97 559.00 419.50
2022 10 25 57.86 58.18 57.65 309.00 637.42
2022 10 24 57.91 57.94 57.59 437.00 913.50
2022 10 23 58.13 58.18 59.21 953.00 956.50
2022 10 22 59.25 58.44 60.95 1202.00 812.79
2022 10 21 59.31 58.48 61.77 1172.00 606.13
2022 10 20 59.61 58.59 62.69 794.00 433.50
2022 10 19 60.12 58.72 62.57 548.00 424.88
2022 10 18 60.10 58.81 61.42 307.00 598.21
2022 10 17 59.85 58.68 60.74 440.00 854.33
2022 10 16 59.64 58.73 60.88 949.00 855.54
2022 10 15 59.55 58.72 61.35 1202.00 672.54
2022 10 14 59.54 58.65 62.78 1171.00 430.38
2022 10 13 60.10 58.72 65.33 780.00 244.46
2022 10 12 61.59 58.90 66.60 457.00 187.00
2022 10 11 62.19 59.13 67.03 204.00 193.67
2022 10 10 62.48 59.21 67.90 206.00 210.42
2022 10 09 62.58 59.32 68.46 202.00 213.92
2022 10 08 62.58 59.24 68.83 201.00 229.25
2022 10 07 62.69 59.28 68.98 203.00 185.54
2022 10 06 62.90 59.28 68.86 204.00 190.79
2022 10 05 63.38 59.49 68.77 204.00 183.33
2022 10 04 63.54 59.68 68.43 170.00 194.63
2022 10 03 63.53 59.49 68.20 154.00 190.58
2022 10 02 63.62 59.44 68.71 156.00 169.50
2022 10 01 63.44 59.36 69.31 154.00 178.29

Data Methods, Notes, Citations

Temperature Threshold

Please refer to the Stanislaus Operations Group (SOG) annual reports for details on within water year activities.

NMFS 2019. Biological Opinion on Long Term Operation of the Central Valley Project and the State Water Project. WCR-2016-00069. October 21. 871 pg. Plus appendices. Available online: https://www.usbr.gov/mp/bdo/lto/biop.html

Direct quote from NMFS 2019, p807.

13.3.4.1 Take Anticipated from Water Temperature Effects

Suboptimal water temperatures in the Stanislaus River are reasonably expected to result in reduced survival during egg-to-fry life stage and reduced growth for the juvenile and smolt life stages for CCV steelhead.

The ecological surrogate to define the extent of take in the Stanislaus River is both the magnitude and frequency of suboptimal water temperature in the reach from Goodwin Dam to Orange Blossom Bridge during times when CCV steelhead are present. Because of the causal relationship of flow magnitude, timing, duration, frequency, and rate of change to survival within and between life stages, flow may be used as a surrogate for the amount or extent of take for listed salmonids.

The CCV steelhead egg-to-fry life stage occurs December through May and temperatures above 54°F create suboptimal conditions for this life stage. A small proportion of CCV steelhead eggs will still be in redds during May and potentially exposed to water temperatures that will be expected to result in egg mortality. The extent of take is all redds exposed to temperatures above 54°F in the vicinity of Orange Blossom Bridge December 1 through May 31. Take of CCV steelhead during the egg-to-fry life stage during these months is expected to be minimal because few eggs would still be in redds.

Steelhead juveniles can survive and grow at water temperatures of 45 to 66°F. Reduced survival is anticipated at temperatures at or above 68°F. The ecological surrogate to define the amount or extent of take of CCV steelhead juvenile life stage is daily average temperature at Orange Blossom Bridge May 15 to October 31. The anticipated level of take will be exceeded if temperatures at Orange Blossom Bridge exceed 68°F between May 15 to October 31 for more than seven consecutive days unless Reclamation and NMFS agree that it is an acceptable exceedance given the hydrologic and meteorological conditions for that year.


Citation
Columbia Basin Research, University of Washington. (2023). SacPAS Stanislaus River Flow and Temperature. Available from www.cbr.washington.edu/sacramento/data/tc_stanislaus.html
Generated: 07 Jun 2023 06:45:06 PDT. www.cbr.washington.edu/sacramento/data/.

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SacPAS: Central Valley Prediction & Assessment of Salmon, University of Washington, Columbia Basin Research, www.cbr.washington.edu/sacramento/