Report Generated 06/01/2021 at 0749

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

May - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Apr 3024 142 5927 60.6 62.4

05/01 49.5 57.3 51.0 57.9 58.3 58.8 60.4 61.3 61.9 62.8 52.8 49.4 52.0 54.3 29 77 7472 68.5 68.6 68.6

05/02 49.6 58.4 51.0 58.1 58.4 58.9 60.3 61.2 61.9 62.8 52.7 49.8 52.4 54.3 25 77 7877 70.0 69.2 69.6

05/03 49.3 59.1 51.0 58.8 58.9 59.3 60.3 61.0 61.6 62.3 52.7 50.5 52.7 54.6 31 77 7822 75.0 70.4 73.1

05/04 49.4 58.9 51.1 59.7 59.9 60.5 61.6 62.3 62.8 63.2 53.1 50.2 53.1 55.2 29 77 7817 78.0 71.4 73.9

05/05 49.4 58.8 51.2 59.8 60.2 60.8 62.1 63.0 63.6 64.4 53.1 50.1 53.1 55.1 29 53 7824 74.0 70.6 73.5

05/06 50.9 57.7 51.5 59.9 60.1 60.7 62.1 63.1 63.7 64.7 53.1 50.0 53.0 54.9 818 38 8405 71.0 68.4 72.1

05/07 52.0 58.7 51.6 58.8 59.4 59.8 61.3 62.2 62.9 63.8 52.7 50.2 52.6 53.7 784 39 8460 69.5 66.3 68.1

05/08 51.6 59.5 51.6 59.1 59.1 59.3 59.9 60.4 60.9 61.9 51.6 50.4 52.6 54.0 776 38 8932 72.0 70.1 71.2

05/09 52.6 60.1 51.7 60.0 60.1 60.6 60.9 61.5 61.9 62.0 51.3 50.2 52.7 54.6 819 37 8963 74.5 71.9 73.9

05/10 51.4 60.3 51.9 60.4 60.5 60.9 61.1 61.6 62.1 62.8 51.3 50.5 52.8 54.8 670 37 8965 76.0 73.7 75.1

05/11 51.2 57.0 51.8 60.7 61.0 61.6 62.0 62.6 63.0 63.5 51.4 50.4 53.1 55.4 3572 37 9018 77.5 71.0 74.1

05/12 51.6 56.3 51.9 58.7 59.5 60.3 61.5 62.5 63.1 64.3 51.6 50.4 53.2 55.7 4001 37 9019 74.5 70.9 73.1

05/13 52.1 56.8 51.9 57.3 58.0 58.5 60.3 61.6 62.3 63.8 52.5 50.5 53.6 55.9 4305 37 8827 76.0 72.8 75.3

05/14 52.7 54.4 51.9 57.5 58.1 58.5 59.7 60.7 61.4 62.9 53.0 50.6 53.7 55.7 6314 60 8823 73.5 70.5 72.5

05/15 52.6 ? 54.7 51.6 55.6 56.4 56.8 58.8 60.0 60.9 62.1 53.2 50.8 53.9 56.0 6760 76 8737 72.0 68.8 67.1

05/16 52.5 54.4 51.6 55.4 56.2 56.7 58.4 59.5 60.1 61.3 53.7 50.7 53.7 56.1 6222 84 8819 72.0 68.5 67.9

05/17 52.6 54.4 51.6 55.5 56.1 56.6 58.5 59.7 60.5 61.8 53.9 50.5 54.0 56.5 6575 76 8815 71.0 68.5 67.6

05/18 53.0 54.6 51.7 55.4 56.0 56.5 58.5 59.8 60.5 61.7 53.4 50.8 53.9 55.8 6510 81 8822 70.5 70.6 69.7

05/19 53.1 54.9 51.6 55.6 55.9 56.2 57.8 58.9 59.6 60.9 52.9 51.0 53.6 54.6 6330 76 8700 66.0 63.6 65.5

05/20 54.5 56.1 51.7 55.6 55.9 56.1 57.2 58.0 58.5 ? 59.1 52.2 51.1 53.0 53.6 6648 76 8674 59.5 58.5 60.0

05/21 54.6 54.2 51.2 56.3 56.3 56.5 57.4 58.0 58.4 58.9 52.6 51.2 52.6 53.6 7361 392 8838 60.5 59.5 62.0

05/22 54.2 53.7 51.4 55.7 56.2 56.6 58.3 59.1 59.5 59.9 52.8 50.3 52.7 54.1 7377 419 8419 65.0 64.2 66.4

05/23 54.2 53.0 51.6 55.2 55.9 56.4 58.2 59.1 59.7 60.7 53.5 49.8 52.4 54.5 7696 150 8524 68.5 66.3 65.9

05/24 54.6 54.1 52.0 54.8 55.5 55.9 57.8 59.0 59.7 60.9 53.4 49.9 52.8 55.1 8071 85 8516 69.5 67.2 70.1

05/25 54.6 53.3 51.9 55.3 55.8 56.2 57.8 59.0 59.8 61.0 53.7 50.3 53.1 55.8 8170 75 8530 69.5 68.0 71.1

05/26 54.9 53.8 51.5 55.4 56.1 56.7 58.7 59.7 60.5 61.2 ? 54.0 50.8 53.6 56.4 6911 184 7682 75.0 70.5 71.4

05/27 54.7 53.5 52.2 55.5 56.2 56.8 58.5 59.8 60.8 62.0 54.5 50.7 54.2 57.0 6637 75 7141 70.5 69.9 71.2

05/28 54.3 53.1 52.0 55.7 56.6 57.4 59.4 60.7 61.5 ? 62.4 55.8 50.9 54.2 56.8 6939 75 7103 80.5 74.4 75.7

05/29 53.9 52.1 52.2 55.5 56.5 57.2 59.5 61.0 62.1 63.6 55.6 51.1 54.1 56.7 5779 76 7076 80.5 77.3 76.0

05/30 54.6 53.4 51.6 55.1 56.2 57.0 59.6 61.3 62.4 63.8 56.0 51.2 54.6 57.9 7150 228 7060 83.0 81.0 82.0

05/31 53.9 53.0 51.6 55.1 56.1 56.8 59.4 61.2 62.4 64.0 56.7 51.3 55.3 59.3 6290 614 7023 ↑ 94.0 85.8 87.1

May 4504 115 8281 69.9 71.3

139628 3563 256703

Legend Notes 276946 7067 509160

? = 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

↓ = Record low air temperature

 = Monthly Averages

58.1

55.6

59.6

D

A

T

E

50.2 52.3

CCR2 SAC2 TCD1 SHD SPP1 KWK BSF

52.6 55.8 51.6 57.1 57.6

50.1 52.8 53.4 54.0 56.6 57.4

Mean Daily 

Release (CFS)

NFH

53.3

Mean Daily Water Temperatures (°F)

50.3

Mean Daily Air 

Temperatures (°F)

RDD

62.2

Total CFS

60.6 55.4 72.8

IGO3

61.3

Total AF

57.9 51.4

RDB

62.3 53.3

LWS

50.5 53.3

DGC

53.9

JLF BND

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

05/01 54 89 71.5 54 84 69.0 52 82 67.0 51 87 69.0 52 89 70.5 55 93 74.0 56 85 70.5 46 75 60.5 50 76 63.0 52 84 68.0 54 82 68.0 54 86 70.0

05/02 52 85 68.5 58 82 70.0 53 87 70.0 53 89 71.0 51 93 72.0 54 82 68.0 45 74 59.5 45 80 62.5 53 81 67.0 53 83 68.0 54 86 70.0 57 87 72.0

05/03 57 83 70.0 62 85 73.5 57 89 73.0 54 92 73.0 54 80 67.0 45 77 61.0 46 81 63.5 48 82 65.0 57 82 69.5 54 87 70.5 56 88 72.0 59 88 73.5

05/04 62 88 75.0 66 89 77.5 55 92 73.5 55 82 68.5 46 76 61.0 48 80 64.0 51 82 66.5 52 89 70.5 57 87 72.0 53 87 70.0 53 87 70.0 57 88 72.5

05/05 66 90 78.0 56 93 74.5 57 86 71.5 49 80 64.5 51 85 68.0 54 86 70.0 54 89 71.5 56 94 75.0 55 91 73.0 57 94 75.5 58 92 75.0 59 90 74.5

05/06 54 94 74.0 57 85 71.0 50 81 65.5 50 85 67.5 53 85 69.0 55 89 72.0 55 93 74.0 56 95 75.5 58 91 74.5 58 93 75.5 58 91 74.5 59 90 74.5

05/07 55 87 71.0 59 81 70.0 51 86 68.5 53 84 68.5 53 89 71.0 56 94 75.0 57 94 75.5 58 93 75.5 59 92 75.5 58 93 75.5 59 91 75.0 58 88 73.0

05/08 58 81 69.5 58 85 71.5 55 84 69.5 54 89 71.5 55 95 75.0 58 95 76.5 58 94 76.0 57 88 72.5 57 78 67.5 53 83 68.0 55 86 70.5 55 85 70.0

05/09 58 86 72.0 64 86 75.0 57 90 73.5 57 95 76.0 56 96 76.0 58 94 76.0 57 92 74.5 57 89 73.0 57 89 73.0 57 91 74.0 58 89 73.5 59 89 74.0

05/10 64 85 74.5 65 89 77.0 57 94 75.5 57 96 76.5 58 96 77.0 58 93 75.5 55 86 70.5 52 90 71.0 60 93 76.5 60 95 77.5 58 87 72.5 58 87 72.5

05/11 64 88 76.0 67 93 80.0 56 96 76.0 59 96 77.5 58 92 75.0 58 92 75.0 57 96 76.5 58 92 75.0 60 91 75.5 58 90 74.0 55 81 68.0 53 79 66.0

05/12 62 93 77.5 57 96 76.5 58 96 77.0 59 92 75.5 59 92 75.5 59 94 76.5 58 88 73.0 54 82 68.0 56 84 70.0 55 81 68.0 53 80 66.5 58 84 71.0

05/13 55 94 74.5 58 95 76.5 58 92 75.0 60 87 73.5 57 93 75.0 58 88 73.0 56 85 70.5 55 83 69.0 53 82 67.5 53 84 68.5 58 86 72.0 57 81 69.0

05/14 57 95 76.0 57 90 73.5 60 83 71.5 56 88 72.0 59 91 75.0 57 84 70.5 54 76 65.0 47 79 63.0 49 83 66.0 57 84 70.5 58 85 71.5 55 84 69.5

05/15 57 90 73.5 58 84 71.0 54 89 71.5 57 87 72.0 54 86 70.0 53 73 63.0 46 70 58.0 45 74 59.5 51 77 64.0 54 80 67.0 56 85 70.5 58 85 71.5

05/16 58 86 72.0 56 91 73.5 55 87 71.0 52 86 69.0 50 78 64.0 47 70 58.5 46 76 61.0 48 81 64.5 50 86 68.0 57 83 70.0 56 82 69.0 57 86 71.5

05/17 54 90 72.0 57 86 71.5 51 83 67.0 48 77 62.5 47 72 59.5 46 75 60.5 49 80 64.5 55 82 68.5 58 89 73.5 59 92 75.5 60 91 75.5 59 89 74.0

05/18 57 85 71.0 57 84 70.5 48 76 62.0 46 71 58.5 45 77 61.0 50 80 65.0 52 84 68.0 54 90 72.0 58 91 74.5 59 93 76.0 61 90 75.5 60 92 76.0

05/19 56 85 70.5 56 76 66.0 44 71 57.5 44 75 59.5 48 78 63.0 50 84 67.0 53 87 70.0 55 89 72.0 63 91 77.0 62 97 79.5 64 95 79.5 62 93 77.5

05/20 54 78 66.0 50 71 60.5 44 75 59.5 47 80 63.5 50 84 67.0 53 88 70.5 54 88 71.0 56 91 73.5 60 95 77.5 61 96 78.5 62 93 77.5 63 94 78.5

05/21 50 69 59.5 46 75 60.5 47 79 63.0 50 83 66.5 53 87 70.0 54 84 69.0 55 86 70.5 54 86 70.0 59 86 72.5 58 94 76.0 60 91 75.5 62 91 76.5

05/22 46 75 60.5 52 80 66.0 51 83 67.0 53 87 70.0 52 84 68.0 53 90 71.5 55 88 71.5 56 89 72.5 64 93 78.5 62 94 78.0 64 94 79.0 64 94 79.0

05/23 52 78 65.0 56 81 68.5 51 85 68.0 50 83 66.5 52 91 71.5 55 91 73.0 57 89 73.0 57 92 74.5 60 96 78.0 61 98 79.5 63 96 79.5 64 93 78.5

05/24 56 81 68.5 52 85 68.5 50 83 66.5 52 90 71.0 54 89 71.5 55 89 72.0 59 92 75.5 59 93 76.0 66 98 82.0 61 93 77.0 62 92 77.0 62 92 77.0

05/25 51 88 69.5 58 83 70.5 53 89 71.0 54 87 70.5 54 91 72.5 57 93 75.0 59 98 78.5 63 102 82.5 65 103 84.0 65 102 83.5 65 96 80.5 64 94 79.0

05/26 55 84 69.5 60 90 75.0 54 87 70.5 54 92 73.0 57 95 76.0 59 100 79.5 64 105 84.5 67 108 87.5 68 103 85.5 64 96 80.0 64 93 78.5 63 92 77.5

05/27 60 90 75.0 54 88 71.0 57 94 75.5 58 98 78.0 61 102 81.5 68 107 87.5 70 108 89.0 72 103 87.5 67 101 84.0 65 99 82.0 65 94 79.5 64 94 79.0

05/28 53 88 70.5 67 94 80.5 64 99 81.5 66 103 84.5 70 107 88.5 72 109 90.5 70 106 88.0 68 103 85.5 67 101 84.0 65 102 83.5 65 96 80.5 62 93 77.5

05/29 67 94 80.5 62 99 80.5 63 104 83.5 69 108 88.5 70 109 89.5 71 105 88.0 68 101 84.5 65 99 82.0 61 89 75.0 58 88 73.0 58 88 73.0 59 88 73.5

05/30 61 100 80.5 63 103 83.0 70 107 88.5 69 107 88.0 69 103 86.0 66 98 82.0 65 97 81.0 65 101 83.0 64 98 81.0 60 90 75.0 60 89 74.5 58 91 74.5

05/31 62 104 83.0 81 108 94.5 68 108 88.0 69 104 86.5 67 101 84.0 65 98 81.5 64 101 82.5 61 96 78.5 65 88 76.5 61 94 77.5 62 94 78.0 64 94 79.0

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

10 Days

Redding (RDD) Daily Air Temperatures (°F)

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

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 TBD

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here Trinity DGC 56 09/15/2021 10/01/2021

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here Trinity NFH 56 10/01/2021 12/31/2021

CCR Sacramento River 9.7 miles downstream of Keswick Dam Click Here

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

58

61

64

67

70

73

76

79

82

85

88

91

94

97

100

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

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 05/26/2021 at 1257

Latest Profile Date: 05/26/2021

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
May-26

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

1998 1854 1482 923 1420 150 138 128 138

1999 1332 1196 1067 1198 107 111 148 122

2000 1236 691 270 732 100 64 37 67

2001 948 865 762 858 76 80 106 87

2002 1278 1093 827 1066 103 102 114 106

2003 1404 804 155 788 113 75 22 70

2004 900 713 558 724 73 66 77 72

2005 1092 634 155 627 88 59 21 56

2006 1362 1215 750 1109 110 113 104 109

2007 963 874 703 847 78 81 97 85

2008 360 313 418 364 29 29 58 39

2009 480 307 384 390 39 29 53 40

2010 1759 1513 842 1371 142 140 117 133

2011 1762 1513 1184 1486 142 141 164 149

2012 1613 1480 885 1326 130 137 123 130

2013 827 776 658 754 67 72 91 77

2014 3 -60 -59 41 0 -6 -8 5

2015 -13 -143 -522 226 -1 -13 -72 29

2016 1367 1153 196 905 110 107 27 82

2017 1491 831 597 973 120 77 83 93

2018 1348 933 203 828 109 87 28 74

2019 1642 1204 753 1200 132 112 104 116

2020 1007 602 14 541 81 56 2 46

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 05/14/2021 at 0835

Latest Profile Date: 05/13/2021

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
May-13

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

2000 934 861 762 852 113 112 120 115

2001 615 567 495 559 74 74 78 75

2002 618 559 576 584 75 73 90 79

2003 1243 856 792 964 150 111 124 129

2004 888 750 647 762 108 97 101 102

2005 757 502 276 512 92 65 43 67

2006 1238 1217 1183 1213 150 158 186 165

2007 583 445 458 495 71 58 72 67

2008 379 288 191 286 46 37 30 38

2009 144 51 -95 97 17 7 -15 13

2010 500 420 237 386 61 55 37 51

2011 1004 896 879 927 122 116 138 125

2012 1043 1070 997 1036 126 139 156 141

2013 509 473 408 463 62 61 64 62

2014 -18 -19 7 15 -2 -2 1 2

2015 -120 -179 -146 149 -15 -23 -23 20

2016 165 137 162 155 20 18 25 21

2017 991 893 818 901 120 116 128 121

2018 629 581 545 585 76 75 86 79

2019 1080 1043 911 1011 131 135 143 136

2020 596 530 497 541 72 69 78 73

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 05/18/2021 at 1348

Latest Profile Date: 05/18/2021

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
May-18

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

2000 69 1 -11 27 49 1 -10 20

2001 18 12 -1 10 12 9 -1 8

2002 36 14 12 21 25 11 10 15

2003 74 82 90 82 52 63 77 64

2004 4 13 22 13 3 10 19 11

2005 9 18 25 17 7 14 21 14

2006 52 47 41 47 36 36 36 36

2007 27 24 19 23 19 18 16 18

2008 48 58 58 55 34 45 50 43

2009 2 -2 -3 2 2 -2 -2 2

2010 90 102 40 77 63 78 35 59

2011 89 73 41 68 63 56 35 51

2012 5 11 14 10 3 9 12 8

2013 -16 -7 4 9 -11 -5 4 7

2014 48 -15 -10 24 34 -11 -9 18

2015 -12 -9 -13 11 -9 -7 -11 9

2016 18 5 0 8 12 4 0 6

2017 61 37 18 39 43 28 15 29

2018 17 25 33 25 12 19 28 20

2019 -1 -4 -4 3 -1 -3 -3 2

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