Report Generated 05/05/2021 at 0943

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

April - 2021
Shasta 

Generation 

Spring 

Creek P.P.

Keswick 

Total BSF RDB

Mar 3089 172 3644 51.3 53.2

04/01 50.2 49.7 49.7 51.1 51.8 52.7 54.6 55.8 56.8 57.0 50.7 50.5 52.7 52.0 3597 77 3456 61.0 59.2 62.3

04/02 50.0 49.4 49.5 51.4 52.0 52.7 54.7 55.9 56.8 57.3 50.6 50.5 53.0 52.3 3644 139 4037 60.5 58.5 61.5

04/03 50.0 49.5 49.4 51.1 51.8 52.6 54.3 55.4 56.2 56.8 50.6 50.7 52.6 52.2 3998 168 4496 58.0 56.9 59.5

04/04 49.9 49.5 49.1 50.7 51.6 52.4 54.2 55.4 56.3 56.7 50.9 51.4 53.1 52.7 4164 497 4495 56.5 56.1 57.6

04/05 49.9 49.3 49.7 50.6 51.5 52.4 54.5 55.9 56.8 57.2 51.5 51.3 55.4 54.1 4252 74 4496 62.0 59.1 58.9

04/06 49.9 ? 49.4 - 50.9 51.8 52.5 54.5 55.8 56.8 57.4 51.3 51.0 55.1 54.2 3791 0 4500 60.5 58.5 60.9

04/07 49.8 49.5 - 50.8 51.8 52.6 54.9 56.2 57.1 57.6 51.4 51.2 55.2 54.1 3723 0 4551 60.0 58.0 58.8

04/08 49.9 ? 49.6 50.2 50.9 51.6 52.3 54.3 55.7 56.7 57.4 50.9 51.4 54.1 53.1 4445 45 4968 58.5 58.1 59.2

04/09 50.1 ? 49.8 49.8 50.8 51.7 52.4 54.2 55.4 56.3 56.9 51.2 51.9 54.3 53.1 4761 76 4956 58.5 57.2 59.1

04/10 49.9 50.2 49.8 50.8 51.6 52.3 54.4 55.7 56.7 57.2 51.2 51.2 54.4 52.9 2505 754 4951 61.5 60.1 62.5

04/11 50.7 51.7 49.6 51.1 51.8 52.5 54.3 55.5 56.6 57.1 51.4 50.4 54.5 53.5 4697 398 4944 66.5 63.7 65.3

04/12 51.1 50.5 49.9 51.9 52.3 53.0 ? 54.5 55.7 56.7 57.1 51.4 50.3 54.4 53.9 4253 52 4950 67.0 67.7 67.2

04/13 50.9 50.3 50.2 51.8 52.4 53.1 54.9 55.9 56.7 57.0 51.2 50.0 54.1 53.8 4739 50 5485 61.5 59.5 61.4

04/14 51.3 50.7 50.1 51.4 52.2 52.8 ? 54.2 55.2 56.1 56.7 51.1 50.0 53.7 53.2 5031 39 6007 63.5 63.1 63.2

04/15 50.6 ? 50.2 49.3 51.7 52.2 52.7 54.3 55.3 56.3 56.8 51.1 49.5 57.0 53.7 5308 217 6014 58.5 57.3 59.2

04/16 50.7 ? 50.3 50.1 51.8 52.5 53.2 54.9 55.9 56.8 57.1 51.6 49.3 57.9 54.8 5603 40 6011 63.5 61.5 64.8

04/17 50.7 ? 50.1 50.4 51.4 52.2 52.9 54.9 56.2 57.2 57.9 51.7 49.8 55.9 53.0 5526 40 6015 65.0 63.5 67.7

04/18 50.6 ? 52.2 50.4 51.3 52.1 52.8 54.7 56.0 57.0 57.7 51.9 49.4 56.9 53.6 4752 40 6562 67.0 64.6 67.5

04/19 ? 50.6 52.3 ? 50.2 52.2 52.6 53.2 54.9 56.2 57.2 57.9 52.4 49.4 57.8 54.5 4232 40 6481 68.0 66.5 67.6

04/20 51.3 55.1 50.5 53.1 53.4 54.0 55.7 56.9 57.8 58.3 52.1 49.5 55.4 53.7 2736 62 6460 64.0 61.3 64.7

04/21 50.8 55.9 49.6 54.2 54.2 54.7 55.9 56.9 57.7 58.2 52.0 50.5 53.6 54.0 2014 323 7013 69.0 66.5 69.1

04/22 50.3 55.3 50.5 55.0 55.2 55.9 57.2 57.9 58.5 58.8 51.9 50.4 53.4 54.6 1297 76 7064 63.5 60.7 62.8

04/23 49.2 55.8 50.5 55.7 55.7 56.4 57.6 58.5 59.1 59.8 51.8 51.2 52.7 53.5 36 77 7520 62.0 61.3 61.9

04/24 49.4 55.2 50.2 56.1 55.9 56.4 57.5 58.4 59.1 59.6 51.6 50.3 52.7 53.9 29 145 7510 61.5 60.3 59.7

04/25 50.0 54.6 49.8 55.6 55.6 55.8 56.1 56.3 56.7 57.4 50.2 50.2 51.1 51.8 564 452 7521 49.5 51.9 52.5

04/26 50.1 55.7 50.8 54.7 55.0 55.4 56.1 56.3 56.5 56.5 50.6 50.1 51.4 51.5 628 78 7472 51.0 49.7 51.8

04/27 49.7 56.4 50.7 55.5 55.6 56.0 56.7 57.2 57.7 58.2 51.6 49.9 51.8 52.9 310 77 7468 62.0 59.2 61.3

04/28 49.5 56.8 50.9 56.7 56.7 57.3 58.4 58.9 59.3 59.6 52.2 49.8 50.4 52.9 26 77 7471 65.5 63.6 66.4

04/29 49.4 56.9 50.8 57.3 57.6 58.1 59.4 60.2 60.7 61.3 52.6 49.1 51.0 52.7 27 81 7468 69.5 65.8 66.7

04/30 49.5 57.1 50.9 57.8 58.1 58.7 60.1 61.0 61.6 62.4 52.8 48.9 51.4 53.3 28 77 7465 71.5 67.8 70.5

-

Apr 3024 142 5927 60.6 62.4

90716 4271 177807

Legend Notes 179931 8471 352673

? = 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

54.0

51.4

55.6

D

A

T

E

49.7 49.1

CCR2 TCD SAC 1 SHD SPP1 KWK BSF

50.2 52.3 50.1 52.8 53.4

48.5 49.7 50.1 50.5 51.9 52.6

Mean Daily 

Release (CFS)

NFH

47.8

Mean Daily Water Temperatures (°F)

48.0

Mean Daily Air 

Temperatures (°F)

RDD

53.0

Total CFS

56.6 53.3 62.2

IGO3

57.4

Total AF

52.5 48.4

RDB

57.9 51.4

LWS

50.3 53.9

DGC

48.0

JLF BND

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

04/01 50 82 66.0 44 84 64.0 47 79 63.0 48 76 62.0 48 72 60.0 47 64 55.5 45 65 55.0 44 66 55.0 49 78 63.5 49 80 64.5 51 79 65.0 52 77 64.5

04/02 42 80 61.0 45 79 62.0 49 76 62.5 47 73 60.0 45 65 55.0 43 72 57.5 44 72 58.0 45 73 59.0 51 78 64.5 48 77 62.5 50 79 64.5 52 76 64.0

04/03 43 78 60.5 43 76 59.5 46 73 59.5 46 68 57.0 42 73 57.5 46 75 60.5 45 73 59.0 45 71 58.0 47 69 58.0 47 77 62.0 47 73 60.0 44 70 57.0

04/04 40 76 58.0 43 73 58.0 45 71 58.0 43 75 59.0 46 75 60.5 46 74 60.0 44 72 58.0 43 73 58.0 48 76 62.0 46 78 62.0 49 74 61.5 49 76 62.5

04/05 42 71 56.5 52 72 62.0 43 77 60.0 47 75 61.0 44 75 59.5 44 77 60.5 45 79 62.0 47 79 63.0 49 80 64.5 48 84 66.0 49 83 66.0 51 76 63.5

04/06 51 73 62.0 45 77 61.0 47 74 60.5 43 75 59.0 44 77 60.5 44 78 61.0 46 82 64.0 49 82 65.5 52 77 64.5 49 81 65.0 49 79 64.0 50 75 62.5

04/07 44 77 60.5 48 73 60.5 42 73 57.5 44 76 60.0 45 78 61.5 47 84 65.5 47 84 65.5 46 83 64.5 55 78 66.5 49 72 60.5 50 74 62.0 49 73 61.0

04/08 47 73 60.0 43 73 58.0 44 77 60.5 45 79 62.0 47 82 64.5 48 84 66.0 47 83 65.0 48 83 65.5 49 76 62.5 48 78 63.0 49 75 62.0 50 75 62.5

04/09 42 75 58.5 42 77 59.5 44 77 60.5 45 82 63.5 47 84 65.5 47 77 62.0 47 77 62.0 47 79 63.0 48 78 63.0 49 83 66.0 52 84 68.0 53 82 67.5

04/10 41 76 58.5 43 79 61.0 47 81 64.0 49 82 65.5 48 76 62.0 46 75 60.5 45 76 60.5 45 78 61.5 49 71 60.0 49 80 64.5 50 77 63.5 51 69 60.0

04/11 42 81 61.5 56 82 69.0 50 83 66.5 49 75 62.0 46 73 59.5 44 76 60.0 45 78 61.5 47 79 63.0 51 80 65.5 52 85 68.5 53 82 67.5 52 80 66.0

04/12 51 82 66.5 62 82 72.0 48 75 61.5 47 73 60.0 43 76 59.5 45 82 63.5 48 87 67.5 49 90 69.5 55 87 71.0 53 85 69.0 53 80 66.5 52 79 65.5

04/13 52 82 67.0 50 75 62.5 47 74 60.5 44 75 59.5 45 83 64.0 49 87 68.0 51 91 71.0 51 90 70.5 57 88 72.5 52 82 67.0 50 81 65.5 53 81 67.0

04/14 47 76 61.5 56 74 65.0 42 75 58.5 46 84 65.0 50 87 68.5 51 90 70.5 52 89 70.5 54 83 68.5 54 84 69.0 52 84 68.0 54 83 68.5 53 79 66.0

04/15 51 76 63.5 43 75 59.0 45 82 63.5 50 85 67.5 51 90 70.5 53 87 70.0 54 84 69.0 51 82 66.5 56 84 70.0 52 88 70.0 53 85 69.0 52 77 64.5

04/16 42 75 58.5 46 82 64.0 50 84 67.0 51 89 70.0 53 89 71.0 54 85 69.5 51 83 67.0 50 83 66.5 55 87 71.0 53 91 72.0 50 84 67.0 52 75 63.5

04/17 44 83 63.5 46 84 65.0 50 89 69.5 54 90 72.0 54 85 69.5 51 83 67.0 50 84 67.0 51 82 66.5 51 79 65.0 49 69 59.0 49 75 62.0 49 76 62.5

04/18 45 85 65.0 43 89 66.0 55 89 72.0 53 83 68.0 52 83 67.5 52 86 69.0 49 83 66.0 48 76 62.0 52 71 61.5 46 74 60.0 48 72 60.0 54 73 63.5

04/19 43 91 67.0 50 89 69.5 49 80 64.5 49 84 66.5 47 86 66.5 46 84 65.0 51 74 62.5 48 66 57.0 43 68 55.5 46 74 60.0 50 74 62.0 53 78 65.5

04/20 48 88 68.0 50 79 64.5 51 84 67.5 47 86 66.5 48 84 66.0 49 72 60.5 49 62 55.5 43 65 54.0 46 72 59.0 48 71 59.5 50 81 65.5 54 82 68.0

04/21 49 79 64.0 53 83 68.0 47 84 65.5 46 82 64.0 49 67 58.0 46 57 51.5 41 65 53.0 44 67 55.5 48 71 59.5 51 86 68.5 51 82 66.5 53 81 67.0

04/22 54 84 69.0 48 82 65.0 47 78 62.5 50 64 57.0 45 56 50.5 40 64 52.0 42 71 56.5 45 78 61.5 54 83 68.5 52 83 67.5 49 81 65.0 56 81 68.5

04/23 46 81 63.5 48 78 63.0 49 66 57.5 44 55 49.5 40 63 51.5 41 74 57.5 45 80 62.5 50 84 67.0 57 88 72.5 55 82 68.5 55 83 69.0 54 85 69.5

04/24 47 77 62.0 54 69 61.5 50 58 54.0 44 66 55.0 44 76 60.0 48 84 66.0 51 89 70.0 52 89 70.5 52 78 65.0 52 80 66.0 51 82 66.5 50 81 65.5

04/25 54 69 61.5 53 59 56.0 44 66 55.0 44 78 61.0 48 85 66.5 52 88 70.0 50 88 69.0 52 85 68.5 50 78 64.0 52 89 70.5 55 85 70.0 53 80 66.5

04/26 42 57 49.5 36 64 50.0 41 78 59.5 47 86 66.5 49 88 68.5 52 88 70.0 53 85 69.0 52 83 67.5 55 83 69.0 53 87 70.0 56 89 72.5 58 88 73.0

04/27 36 66 51.0 47 78 62.5 46 87 66.5 51 88 69.5 55 87 71.0 53 85 69.0 51 83 67.0 51 87 69.0 57 87 72.0 55 91 73.0 57 92 74.5 57 84 70.5

04/28 45 79 62.0 38 86 62.0 50 90 70.0 55 87 71.0 56 87 71.5 50 83 66.5 49 87 68.0 52 88 70.0 55 90 72.5 56 94 75.0 56 89 72.5 56 81 68.5

04/29 43 88 65.5 51 89 70.0 54 88 71.0 54 86 70.0 52 82 67.0 51 86 68.5 51 88 69.5 52 90 71.0 57 90 73.5 54 89 71.5 54 87 70.5 54 85 69.5

04/30 50 89 69.5 54 88 71.0 56 85 70.5 52 83 67.5 52 87 69.5 55 88 71.5 52 92 72.0 55 89 72.0 53 82 67.5 51 83 67.0 52 84 68.0 53 84 68.5

-

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

9 Days 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

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 TBD

SPP N/A Spring Creek Power Plant N/A Trinity DGC 56 09/15/2021 10/01/2021

KWK Sacramento River 0.8 miles downstream of Keswick Dam Click Here Trinity NFH 56 10/01/2021 12/31/2021

SAC Sacramento River 4.8 miles downstream of Keswick Dam Click Here

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

48

50

52

54

56

58

60

62

64

66

68

70

72

49

50

51

52

53

54

55

56

57

58

59

60

61

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

Air Temperature (°F)

Water Temperature (°F)

Mean Daily Temperatures

TCD KWK SAC CCR BSF RDD (Air)

4
Updated 04/29/2021 at 0841

Latest Profile Date: 04/28/2021

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
Apr-28

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

1998 1694 1692 1678 1688 118 137 204 153

1999 1836 1740 1335 1637 128 141 163 144

2000 1306 910 427 881 91 74 52 72

2001 1192 1166 1069 1142 83 95 130 103

2002 1437 1339 1025 1267 100 109 125 111

2003 1444 1056 407 969 100 86 50 79

2004 1139 1066 762 989 79 87 93 86

2005 1258 1101 327 896 87 89 40 72

2006 1928 1964 995 1629 134 160 121 138

2007 1232 1232 973 1146 86 100 118 101

2008 442 397 599 479 31 32 73 45

2009 479 466 622 522 33 38 76 49

2010 1709 1346 1095 1383 119 109 133 120

2011 1833 1860 1436 1710 127 151 175 151

2012 1950 1632 1074 1552 136 132 131 133

2013 1140 1076 822 1013 79 87 100 89

2014 97 1 -61 53 7 0 -7 5

2015 106 -88 -575 256 7 -7 -70 28

2016 1620 1431 231 1094 113 116 28 86

2017 1679 1269 1076 1341 117 103 131 117

2018 1541 1293 381 1072 107 105 46 86

2019 1733 1423 816 1324 120 116 99 112

2020 1299 689 88 692 90 56 11 52

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 04/08/2021 at 1435

Latest Profile Date: 04/08/2021

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
Apr-08

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

2000 990 964 717 890 89 95 84 89

2001 483 522 550 518 43 52 65 53

2002 625 676 733 678 56 67 86 70

2003 947 899 585 811 85 89 69 81

2004 717 691 718 709 64 68 85 72

2005 616 330 297 414 55 33 35 41

2006 1106 1210 1102 1139 99 119 130 116

2007 677 610 641 643 61 60 75 65

2008 490 578 486 518 44 57 57 53

2009 84 68 -112 88 8 7 -13 9

2010 247 287 234 256 22 28 28 26

2011 1014 1104 1079 1066 91 109 127 109

2012 842 858 969 890 75 85 114 91

2013 1006 788 620 805 90 78 73 80

2014 50 104 -32 62 4 10 -4 6

2015 -182 -183 -103 156 -16 -18 -12 15

2016 109 157 230 165 10 15 27 17

2017 946 899 905 917 85 89 107 93

2018 702 612 617 644 63 60 73 65

2019 948 1052 899 966 85 104 106 98

2020 744 632 407 594 67 62 48 59

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 04/13/2021 at 1311

Latest Profile Date: 04/13/2021

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
Apr-13

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

2000 2 2 -19 8 1 1 -11 4

2001 -4 -23 -23 17 -2 -10 -13 8

2002 -3 -42 -17 21 -1 -19 -9 10

2003 -4 -4 38 15 -2 -2 21 8

2004 -8 -24 -10 14 -3 -11 -5 7

2005 3 3 45 17 1 1 25 9

2006 -2 -2 40 15 -1 -1 22 8

2007 -19 -23 6 16 -9 -10 3 7

2008 -2 -2 36 13 -1 -1 20 7

2009 -25 -29 10 21 -11 -13 5 10

2010 0 0 42 14 0 0 23 8

2011 9 9 43 21 4 4 24 11

2012 -57 -61 -27 48 -26 -27 -15 23

2013 -34 -34 1 23 -15 -16 0 10

2014 -11 -25 3 13 -5 -11 2 6

2015 -28 -29 11 23 -13 -13 6 11

2016 2 -8 16 9 1 -4 9 4

2017 2 -14 14 10 1 -6 8 5

2018 -25 -26 15 22 -11 -12 8 10

2019 -16 -17 24 19 -7 -8 13 9

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