Report Generated 08/02/2021 at 0738

Page Description

2 - Mean Daily Water Temperature, Release Flow Rates and Air Temperatures with Monthly Averages

3 - Redding 10-Day Forecasted Air Temperatures

4 - Sacramento River Mean Daily Water Temperature, Air Temperature and 10-Day Forecasted Air Temperature Plot

- Water Temperature Measuring Station Details

- Temperature Control Point Details

5 - Shasta Lake Isothermobaths & Cold Water Pool Statistics

14 - Trinity Lake Isothermobaths & Cold Water Pool Statistics

23 - Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

x - TCD Configuration (External Link)

All Data in this Report is Preliminary and Subject to Change

Northern CVP Water Temperature Report

July - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Jun 6271 1023 7693 78.2 78.1

07/01 52.2 ? 50.6 ? 55.0 53.5 54.5 55.2 58.0 ! - 61.0 63.1 57.9 52.6 62.9 69.1 7022 1305 8536 86.0 81.0 79.5

07/02 51.9 50.6 54.9 53.4 54.4 55.0 57.3 ! - 60.2 62.1 57.3 52.6 62.8 69.3 6563 1707 8448 86.5 82.7 81.0

07/03 52.4 50.4 ? 55.3 53.6 54.7 55.3 57.7 ! - 60.1 61.8 57.2 52.5 62.5 69.0 6962 1868 8452 87.5 83.4 82.8

07/04 52.6 51.2 55.5 53.4 54.3 54.9 57.3 ! - 60.1 62.1 57.3 52.1 62.7 69.1 7238 2006 9204 87.5 82.3 81.5

07/05 52.0 50.7 55.8 53.8 54.6 55.2 57.3 ! - 59.7 61.3 57.2 51.6 62.4 68.8 6749 1971 9210 87.5 82.8 81.6

07/06 52.2 50.9 55.8 53.7 54.6 55.2 ? 57.4 ? 59.0 59.8 61.4 57.0 51.5 62.1 68.6 7429 2100 9192 85.0 81.2 80.1

07/07 52.0 51.1 56.1 53.6 54.5 55.0 ? 57.0 58.5 59.7 61.4 56.9 51.2 # - 67.4 7229 2122 9438 86.0 83.4 82.1

07/08 51.9 ? 50.6 ? 56.1 53.8 54.7 55.3 57.1 58.4 59.5 61.1 56.8 51.4 # - 67.3 6983 2044 9335 87.0 82.4 83.1

07/09 52.1 ? 50.7 ? 56.1 53.6 54.5 55.2 ? 57.2 58.7 59.8 61.4 57.1 50.9 # - 67.3 7454 1844 9209 91.0 85.3 87.6

07/10 51.7 ? 50.5 ? 56.1 53.8 54.6 55.2 57.1 58.6 59.7 61.4 57.3 51.3 # - 67.9 6606 2169 9302 95.0 89.0 90.4

07/11 52.1 ? 50.4 ? 56.3 53.8 54.8 55.5 ? 57.5 59.1 60.2 61.8 57.7 51.4 # - 68.4 6843 1537 9269 94.5 88.6 88.8

07/12 51.7 50.3 ! - 53.7 54.6 55.2 57.3 58.9 60.1 61.9 57.4 51.5 # - 68.7 7159 1889 9198 89.0 83.3 82.9

07/13 52.2 ? 50.5 ? 56.7 53.6 54.5 55.1 57.2 58.7 59.9 61.6 56.9 51.5 # - 68.7 7204 1945 9242 86.5 80.8 79.5

07/14 52.4 ? 50.7 ? 56.7 53.7 54.6 55.2 ? 57.0 58.5 59.6 61.3 56.8 51.5 # - 68.3 6767 1917 9263 83.5 78.4 77.3

07/15 52.5 ? 50.8 ! - 53.9 54.7 55.3 57.1 58.5 59.5 61.1 56.7 51.5 # - 68.0 7131 1944 9309 82.0 76.5 77.3

07/16 52.8 ? 50.9 # - 54.0 54.8 55.3 ! - 58.5 59.6 61.0 56.9 51.4 # - 67.5 6757 2080 9319 82.0 - 76.9

07/17 52.5 ? 50.7 # - 54.5 55.2 55.7 ? 57.3 58.6 59.5 60.9 58.1 51.5 # - 67.3 6705 1885 9271 83.0 77.8 78.8

07/18 51.7 50.7 # - 53.8 54.8 55.4 57.5 58.9 60.0 61.4 58.3 51.6 # - 67.5 7255 1684 9211 86.0 81.3 83.1

07/19 52.4 ? 50.6 # - 53.9 54.7 55.3 57.1 58.6 59.7 61.2 58.1 51.3 # - 66.6 6721 1975 9247 85.5 82.6 82.6

07/20 52.2 ? 50.9 # - 53.9 54.8 55.3 57.1 58.6 59.7 61.3 58.4 51.2 # - 66.2 6716 1924 9251 85.0 81.0 81.5

07/21 ? 52.6 ? 51.0 # - ? 53.9 ? 54.8 ? 55.4 ? 57.2 ? 58.6 ? 59.6 ? 61.3 ? 58.4 ? 51.2 # - ? 66.1 7212 1911 9257 83.5 80.1 80.1

07/22 7010 1955 9255 83.5

07/23 87.0

07/24 52.2 ? 50.9 # - 53.7 54.2 54.8 55.9 57.0 58.0 59.1 57.1 51.2 # - 66.2 6274 1859 9254 82.5 75.6 76.2

07/25 52.2 51.2 # - 53.5 54.2 54.9 56.3 57.4 58.2 59.1 58.2 50.7 # - 65.8 7182 1901 9248 86.0 79.9 80.8

07/26 52.1 ? 51.0 # - 53.9 54.6 55.3 56.6 57.9 58.9 60.2 58.5 51.1 # - 66.7 6912 2093 9295 86.5 79.3 78.6

07/27 52.9 ? 51.5 # - 53.8 54.2 54.7 55.7 56.8 57.8 59.1 56.2 50.9 # - 65.2 7167 2023 9302 74.0 70.6 72.6

07/28 52.5 ? 51.5 # - 53.7 54.4 55.1 ? 56.4 57.4 58.0 58.7 58.4 50.6 # - 64.1 6835 1813 9305 84.0 80.6 83.6

07/29 53.2 ? 51.7 # - 54.4 55.3 56.0 57.3 58.5 59.3 60.6 58.8 50.5 # - 65.6 6695 1941 9056 91.0 84.3 85.9

07/30 53.2 ? 51.9 # - 54.7 55.3 56.0 ? 57.5 59.0 60.1 61.7 58.9 50.7 # - 65.3 6309 1921 9046 91.5 84.6 85.1

07/31 53.1 ? 52.1 # - 54.9 55.6 56.5 ? 58.2 59.6 60.6 61.9 59.0 51.0 # - 65.0 6588 1977 9046 92.0 85.3 83.5

Jul 6923 1910 9166 81.6 81.5

207677 57310 274970

Legend Notes 411919 113672 545392

? = 1-9 hours of data missing (Average includes estimations) 1 Temperatures are weighted averages based on individual penstock flow and temperature

! = 10 or more hours of data missing (Average not calculated) Highlighted cells in the TCD column indicate a TCD change was made on that day

# = Station out of service 2 Current Sacramento River control point (see page 4 for more details)

↑ = Record high air temperature 3 Data is currently being collected locally and periodically downloaded.

↓ = Record low air temperature Once downloaded and certified by USGS, missing data will be added.

 = Monthly Averages

Total AF

62.4 56.6

RDB

61.1 57.6

LWS

51.4 62.6

DGC3

59.0

Mean Daily Air 

Temperatures (°F)

RDD

82.4

Total CFS

67.3 86.4

Mean Daily 

Release (CFS)

NFH

63.5

Mean Daily Water Temperatures (°F)

51.5

JLF BND IGO

53.8

52.9 54.1

USGS data transmission services offline during this time period.

55.1 55.7 58.2 59.6 60.8

D

A

T

E

53.1 51.7

SAC CCR 2 TCD1 SHD SPP1 KWK BSF

52.3 50.9 55.9 54.7

USGS data transmission services offline during this time period.

55.3 57.1 58.4 59.6

2
↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg ↓ ↑ Avg

07/01 76 105 90.5 74 101 87.5 67 104 85.5 70 106 88.0 71 103 87.0 70 104 87.0 69 104 86.5 69 105 87.0 69 101 85.0 66 99 82.5 67 97 82.0 68 99 83.5

07/02 72 100 86.0 70 105 87.5 69 106 87.5 70 104 87.0 70 104 87.0 69 105 87.0 67 102 84.5 67 103 85.0 67 103 85.0 68 104 86.0 72 102 87.0 70 101 85.5

07/03 69 104 86.5 70 105 87.5 70 103 86.5 69 105 87.0 70 103 86.5 66 102 84.0 66 102 84.0 69 105 87.0 71 106 88.5 70 108 89.0 71 102 86.5 70 103 86.5

07/04 69 106 87.5 73 103 88.0 69 105 87.0 69 104 86.5 69 105 87.0 70 106 88.0 69 104 86.5 69 108 88.5 72 108 90.0 70 108 89.0 72 103 87.5 69 102 85.5

07/05 72 103 87.5 71 105 88.0 69 104 86.5 67 104 85.5 68 108 88.0 71 110 90.5 73 111 92.0 74 113 93.5 74 110 92.0 71 105 88.0 70 99 84.5 66 98 82.0

07/06 70 105 87.5 68 102 85.0 66 103 84.5 67 106 86.5 70 110 90.0 73 111 92.0 74 111 92.5 73 110 91.5 70 103 86.5 68 100 84.0 69 96 82.5 67 98 82.5

07/07 68 102 85.0 68 104 86.0 67 106 86.5 70 111 90.5 73 112 92.5 75 113 94.0 74 109 91.5 71 105 88.0 71 105 88.0 68 104 86.0 69 99 84.0 67 99 83.0

07/08 67 105 86.0 68 107 87.5 71 112 91.5 75 115 95.0 78 113 95.5 75 109 92.0 71 106 88.5 68 104 86.0 68 102 85.0 67 100 83.5 68 98 83.0 68 101 84.5

07/09 67 107 87.0 72 111 91.5 74 115 94.5 78 116 97.0 75 111 93.0 70 106 88.0 69 106 87.5 68 103 85.5 68 101 84.5 66 103 84.5 68 98 83.0 67 100 83.5

07/10 71 111 91.0 68 114 91.0 77 115 96.0 75 111 93.0 73 106 89.5 69 104 86.5 67 102 84.5 66 101 83.5 67 101 84.0 66 101 83.5 69 99 84.0 68 101 84.5

07/11 76 114 95.0 72 113 92.5 77 110 93.5 73 107 90.0 69 105 87.0 68 99 83.5 64 98 81.0 64 99 81.5 68 99 83.5 67 102 84.5 69 99 84.0 67 101 84.0

07/12 76 113 94.5 76 109 92.5 68 106 87.0 67 103 85.0 67 98 82.5 64 97 80.5 63 99 81.0 65 101 83.0 65 100 82.5 66 101 83.5 69 99 84.0 66 98 82.0

07/13 71 107 89.0 69 105 87.0 64 101 82.5 65 97 81.0 63 97 80.0 63 98 80.5 64 101 82.5 68 104 86.0 67 107 87.0 70 103 86.5 69 98 83.5 66 98 82.0

07/14 68 105 86.5 66 100 83.0 64 96 80.0 62 97 79.5 63 99 81.0 64 100 82.0 67 103 85.0 70 104 87.0 70 101 85.5 67 101 84.0 67 97 82.0 65 98 81.5

07/15 66 101 83.5 68 97 82.5 64 99 81.5 62 102 82.0 66 104 85.0 70 103 86.5 70 103 86.5 67 102 84.5 68 101 84.5 65 99 82.0 66 95 80.5 63 95 79.0

07/16 67 97 82.0 66 98 82.0 65 102 83.5 64 103 83.5 68 103 85.5 67 102 84.5 67 102 84.5 65 101 83.0 64 97 80.5 65 99 82.0 68 99 83.5 67 101 84.0

07/17 65 99 82.0 65 101 83.0 63 103 83.0 69 100 84.5 67 100 83.5 64 100 82.0 63 100 81.5 63 101 82.0 66 103 84.5 67 102 84.5 70 99 84.5 67 99 83.0

07/18 65 101 83.0 68 105 86.5 69 102 85.5 66 100 83.0 64 99 81.5 63 101 82.0 63 102 82.5 64 104 84.0 68 104 86.0 67 102 84.5 69 97 83.0 66 99 82.5

07/19 66 106 86.0 70 102 86.0 66 100 83.0 63 99 81.0 62 100 81.0 62 101 81.5 65 104 84.5 66 103 84.5 67 100 83.5 65 100 82.5 69 98 83.5 66 100 83.0

07/20 68 103 85.5 71 101 86.0 64 100 82.0 63 102 82.5 64 103 83.5 65 104 84.5 66 103 84.5 66 98 82.0 67 102 84.5 69 102 85.5 70 99 84.5 67 99 83.0

07/21 69 101 85.0 68 100 84.0 64 102 83.0 64 105 84.5 67 106 86.5 67 104 85.5 67 101 84.0 66 99 82.5 70 102 86.0 70 103 86.5 70 101 85.5 67 100 83.5

07/22 67 100 83.5 65 103 84.0 62 105 83.5 66 107 86.5 68 106 87.0 68 103 85.5 68 99 83.5 69 100 84.5 71 105 88.0 70 106 88.0 71 101 86.0 66 99 82.5

07/23 65 102 83.5 67 107 87.0 66 109 87.5 69 106 87.5 69 101 85.0 68 95 81.5 68 101 84.5 68 104 86.0 71 107 89.0 70 105 87.5 70 101 85.5 66 100 83.0

07/24 66 108 87.0 66 109 87.5 71 108 89.5 70 101 85.5 70 91 80.5 67 103 85.0 70 106 88.0 70 105 87.5 72 106 89.0 69 107 88.0 69 101 85.0 66 100 83.0

07/25 66 99 82.5 67 104 85.5 70 99 84.5 67 87 77.0 65 100 82.5 66 105 85.5 70 105 87.5 70 101 85.5 68 103 85.5 65 102 83.5 67 98 82.5 65 99 82.0

07/26 67 105 86.0 72 99 85.5 67 86 76.5 66 102 84.0 69 105 87.0 70 105 87.5 69 103 86.0 69 101 85.0 70 103 86.5 68 101 84.5 67 97 82.0 65 98 81.5

07/27 72 101 86.5 72 90 81.0 65 103 84.0 69 106 87.5 70 107 88.5 71 102 86.5 69 100 84.5 66 98 82.0 69 100 84.5 65 100 82.5 66 96 81.0 65 98 81.5

07/28 68 80 74.0 64 103 83.5 68 105 86.5 70 106 88.0 71 100 85.5 69 97 83.0 66 99 82.5 65 99 82.0 66 99 82.5 65 91 78.0 66 88 77.0 64 93 78.5

07/29 62 106 84.0 74 107 90.5 71 106 88.5 70 100 85.0 68 100 84.0 66 99 82.5 64 99 81.5 63 98 80.5 67 98 82.5 68 95 81.5 67 92 79.5 64 96 80.0

07/30 74 108 91.0 79 107 93.0 71 104 87.5 68 100 84.0 67 99 83.0 64 100 82.0 61 99 80.0 62 100 81.0 67 100 83.5 68 99 83.5 67 94 80.5 65 95 80.0

07/31 78 105 91.5 81 104 92.5 68 102 85.0 66 101 83.5 64 101 82.5 64 100 82.0 63 101 82.0 63 100 81.5 70 95 82.5 66 96 81.0 66 95 80.5 65 96 80.5

Web Links Legend

10-Day Min/Max Forecast NR = Forecasted temperatures not recorded

Previous Days Min/Max Actuals 100 = Previous day actual temperatures in red and bolded indicate a record temperature for that date

8 Days

D

A

T

E

Forecasted

4 Days 5 Days 6 Days

Actual

Previous Day Current Day 1 Day 2 Days 3 Days 7 Days 9 Days 10 Days

Redding (RDD) Daily Air Temperatures (°F)

3
Code Body of Water Location1 CDEC Link River Point Temp. (°F) Begin Date End Date

TCD N/A Shasta Power Plant N/A Sacramento CCR 56 09/21/2020 04/18/2021

SHD Sacramento River 0.3 miles downstream of Shasta Power Plant Click Here Sacramento CCR 60 04/18/2021 05/17/2021

SPP N/A Spring Creek Power Plant N/A Sacramento SAC 57 05/17/2021 06/15/2021

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here Sacramento SAC 55 06/15/2021 TBD

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here Trinity DGC 56 09/15/2021 10/01/2021

CCR Sacramento River 9.7 miles downstream of Keswick Dam Click Here Trinity NFH 56 10/01/2021 12/31/2021

BSF Sacramento River 25 miles downstream of Keswick Dam Click Here

JLF Sacramento River 34 miles downstream of Keswick Dam Click Here

BND Sacramento River 41 miles downstream of Keswick Dam Click Here

RDB Sacramento River 58 miles downstream of Keswick Dam Click Here

IGO Clear Creek 7.3 miles downstream of Whiskeytown Dam Click Here

LWS Trinity River 1.1 miles downstream of Lewiston Dam Click Here Notes

DGC Trinity River 19 miles downstream of Lewiston Dam Click Here

NFH Trinity River 38 miles downstream of Lewiston Dam Click Here 1 Distances are approximate

Station Details Water Right Temperature Control Points

72

75

78

81

84

87

90

93

96

51

52

53

54

55

56

57

58

59

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Air Temperature (°F)

Water Temperature (°F)

Mean Daily Temperatures

TCD KWK SAC CCR BSF RDD (Air)

4
Updated 07/29/2021 at 1055

Latest Profile Date: 07/28/2021

Page Description

6 - Shasta Lake Isothermobaths Plot

7 - Shasta Lake Cold Water Pool Volume ≤52°F

8 - Shasta Lake Cold Water Pool Volume ≤50°F

9 - Shasta Lake Cold Water Pool Volume ≤48°F

10 - Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

11 - Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

12 - Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

13 - Shasta Lake Cold Water Pool Comparison by Year

Shasta Lake Isothermobaths & Cold Water Pool Statistics

2021

5
6

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
7

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F

Avg (1998-2020) 2014 2015 2016 2019 2021
8

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F

Avg (1998-2020) 2014 2015 2016 2019 2021
9

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F

Avg (1998-2020) 2014 2015 2016 2019 2021
10

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
11

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
12

0

500

1000

1500

2000

2500

3000

3500

4000

4500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Shasta Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (1998-2020)

2021 95 90 75 50 25 10 5
Jul-28

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

1998 668 332 85 362 119 68 26 71

1999 880 764 679 774 157 157 205 173

2000 528 294 21 281 94 60 6 54

2001 436 400 376 404 78 82 113 91

2002 691 597 455 581 123 122 137 128

2003 621 144 -66 277 110 29 -20 53

2004 291 195 164 217 52 40 50 47

2005 308 155 16 160 55 32 5 30

2006 882 677 437 665 157 139 132 143

2007 478 418 372 423 85 86 112 94

2008 152 136 196 161 27 28 59 38

2009 315 263 273 284 56 54 82 64

2010 1086 804 491 794 193 165 148 169

2011 1242 1027 787 1019 221 210 238 223

2012 998 933 591 841 178 191 178 182

2013 467 410 365 414 83 84 110 92

2014 -50 -60 -26 45 -9 -12 -8 10

2015 166 75 -173 138 30 15 -52 32

2016 1148 957 270 792 204 196 82 161

2017 1114 808 526 816 198 165 159 174

2018 883 674 258 605 157 138 78 124

2019 1291 1052 679 1008 230 216 205 217

2020 582 387 138 369 104 79 42 75

2021 0 0 0 0 0 0 0 0

∆ TAF % ∆

Shasta Lake Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

13
Updated 07/12/2021 at 1259

Latest Profile Date: 07/12/2021

Page Description

15 - Trinity Lake Isothermobaths Plot

16 - Trinity Lake Cold Water Pool Volume ≤52°F

17 - Trinity Lake Cold Water Pool Volume ≤50°F

18 - Trinity Lake Cold Water Pool Volume ≤48°F

19 - Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances

20 - Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances

21 - Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances

22 - Trinity Lake Cold Water Pool Comparison by Year

Trinity Lake Isothermobaths & Cold Water Pool Statistics

2021

14
15

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
16

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F

Avg (2000-2020) 2014 2015 2016 2019 2021
17

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F

Avg (2000-2020) 2014 2015 2016 2019 2021
18

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F

Avg (2000-2020) 2014 2015 2016 2019 2021
19

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤52°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
20

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤50°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
21

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Trinity Lake Cold Water Pool Volume ≤48°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Jul-12

2021 ≤52° ≤50° ≤48° Abs. Avg. ≤52° ≤50° ≤48° Abs. Avg.

2000 626 504 361 497 105 95 79 93

2001 464 411 341 405 78 77 75 77

2002 441 423 361 408 74 80 79 77

2003 839 649 450 646 140 122 98 120

2004 529 438 294 420 88 83 64 78

2005 610 480 210 433 102 90 46 79

2006 899 798 602 766 150 151 132 144

2007 483 466 419 456 81 88 92 87

2008 232 178 39 150 39 34 9 27

2009 84 43 -39 55 14 8 -8 10

2010 447 344 110 300 75 65 24 55

2011 933 781 563 759 156 147 123 142

2012 766 756 654 725 128 143 143 138

2013 354 333 241 310 59 63 53 58

2014 -104 -78 -74 86 -17 -15 -16 16

2015 -172 -166 -178 172 -29 -31 -39 33

2016 40 -16 -51 36 7 -3 -11 7

2017 625 497 374 499 104 94 82 93

2018 504 477 419 467 84 90 92 89

2019 872 814 703 797 146 154 154 151

2020 395 400 292 362 66 75 64 68

2021 0 0 0 0 0 0 0 0

Trinity Cold Water Pool Comparison by Year (for Specified Date)

∆ TAF % ∆

Historic - Current (Historic - Current) / Current

22
Updated 07/13/2021 at 1425

Latest Profile Date: 07/13/2021

Page Description

24 - Whiskeytown Lake Isothermobaths Plot

25 - Whiskeytown Lake Cold Water Pool Volume ≤60°F

26 - Whiskeytown Lake Cold Water Pool Volume ≤58°F

27 - Whiskeytown Lake Cold Water Pool Volume ≤56°F

28 - Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances

29 - Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances

30 - Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances

31 - Whiskeytown Lake Cold Water Pool Comparison by Year

Whiskeytown Lake Isothermobaths & Cold Water Pool Statistics

2021

23
24

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Isothermobaths Plot - 2021

<46 46-48 48-50 50-52 52-54 54-56 56-58 58-60

60-62 62-64 64-66 66-68 68-70 >70 Storage
25

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F

Avg (2000-2020) 2014 2015 2016 2019 2021
26

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F

Avg (2000-2020) 2014 2015 2016 2019 2021
27

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F

Avg (2000-2020) 2014 2015 2016 2019 2021
28

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤60°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
29

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤58°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
30

0

50

100

150

200

250

300

01/01 02/01 03/01 04/01 05/01 06/01 07/01 08/01 09/01 10/01 11/01 12/01

Volume (TAF)

Whiskeytown Lake Cold Water Pool Volume ≤56°F - Percent Exceedances (2000-2020)

2021 95 90 75 50 25 10 5
Jul-13

2021 ≤60° ≤58° ≤56° Abs. Avg. ≤60° ≤58° ≤56° Abs. Avg.

2000 52 50 40 47 50 52 46 50

2001 49 46 18 38 48 48 21 39

2002 44 41 14 33 43 43 17 34

2003 48 40 23 37 46 42 27 38

2004 47 44 30 40 45 46 35 42

2005 5 -9 -37 17 5 -9 -42 19

2006 72 74 56 67 70 77 64 71

2007 44 42 12 33 43 44 14 34

2008 48 44 22 38 47 47 25 39

2009 17 -9 -37 21 17 -10 -42 23

2010 26 5 -30 20 25 5 -34 21

2011 54 47 23 41 52 50 26 43

2012 36 22 -23 27 35 23 -27 28

2013 58 55 45 53 56 58 52 55

2014 38 23 -37 33 37 24 -42 34

2015 11 -32 -42 28 11 -34 -48 31

2016 19 8 -22 17 19 9 -26 18

2017 52 52 40 48 51 55 46 51

2018 50 35 -21 35 48 37 -24 36

2019 43 32 7 27 42 34 8 28

2020 0 0 0 0 0 0 0 0

∆ TAF % ∆

Whiskeytown Cold Water Pool Comparison by Year (for Specified Date)

Historic - Current (Historic - Current) / Current

31