1/25/2021

10 Day Northern California Precipitation Forecast: 5% chance of precipitation today, 40% tomorrow, 70% on 1/27, 65% on 1/28, 30% on 1/29, 40% on 1/30, 60% on 1/31, 60% on 2/1, 40% on 2/2 and 10% on 2/3

 

From CDEC: Precipitation to date for water year 2020-2021 - As of 1/25/2021:

Northern Sierra Precipitation Index: 9.7" = 37% of average for this date

San Joaquin Precipitation Index: 5.6" = 30% of average for this date

Tulare Basin Precipitation Index: 3.4" = 25% of average for this date


From CDEC: Average statewide snow water equivalents as of 1/25/2021:

North: 7.6" = 47% of normal for this date

Central: 7.3" = 42% of normal for this date

South: 3.0" = 23% of normal for this date

Statewide: 6.3" = 40% of normal for this date

 

River Flows (Current and estimated future flow rates from NOAA's California Nevada River Forecast Center and CDEC)

Sacramento River (I Street Bridge)

The 1/24 daily average reported 7,160 cfs which may increase to 7,955 cfs by 1/29.

Feather River (at Boyd's Landing)

The Feather is reporting 1,919 cfs and may increase to 3,334 cfs by 1/29.

San Joaquin River (near Vernalis)

The San Joaquin is currently reporting 855 cfs and may increase to 1.119 cfs by 1/29.

 

Delta Cross Channel Gate Operation (From the USBR website)

Posted: 11/25/2020

Delta Cross Channel Gates will OPEN on Wednesday November 25, 2020 at approximately 1000 hrs.

Delta Cross Channel Gates will CLOSE on Tuesday December 1, 2020 at approximately 1000 hrs.

Gates will remain closed until further notice.

Comment: Dec 1 seasonal closure.

PLEASE NOTE: GATES MAY NEED TO BE CLOSED WITH SHORT NOTICE IF A FISHERY CONCERN IS IDENTIFIED.

 

EC and Bromide - Banks Pumping Plant, Jones Pumping Plant, Clifton Court Forebay (EC only), San Joaquin River at Vernalis, Gianelli Pumping Plant, Sacramento River at Hood (EC only)

While levels remained relatively stable over the time period, recent and expected upcoming precipitation could possibly decrease EC and bromide values in the coming week.

Banks: EC - 692 uS/cm, (Est.) Br - 0.47 mg/L, 10 Days ago: 670 uS/cm and 0.47 mg/L ( The anion analyzer is experiencing an issue, troubleshooting will occur on 1/26.)

Jones Daily Average: EC - 837 uS/cm, 10 days ago: 800 uS/cm, (The anion analyzer remains non-operational.)

Clifton Court Forebay Daily Average: EC - 757 uS/cm, 10 days ago: 751 uS/cm

Vernalis: EC - 828 uS/cm, Br - 0.36 mg/L, 10 days ago: 817 uS/cm and Br 0.34 mg/L

Gianelli: EC - 727 uS/cm, , 10 days ago: 727 uS/cm (The anion analyzer is down, a manufacturer service engineer will be on site today (1/25) to replace a critical component.)

Hood: EC - 198 uS/cm, 10 days ago: 225 uS/cm


Organic Carbon, TOC and DOC - Banks Pumping Plant, Jones Pumping Plant, San Joaquin River at Vernalis, Gianelli Pumping Plant, Sacramento River at Hood

No major changes over the time period, however we may see an increase coming due to recent and expected upcoming precipitation. If enough rain moves through the area, it should increase the level of land based material that will enter area waterways through runoff and increase carbon levels.

Banks: TOC = 4.2 mg/L, DOC - 3.7 mg/L 10 days ago: 4.3 3.8

Jones: TOC = 4.1 mg/L, DOC - 3.6 mg/L 5 days ago: 3.8, 3.4

Vernalis: TOC = 2.8 mg/L, DOC = 2.8 mg/L 10 days ago: 2.9, 2.9

Gianelli: TOC = 3.8 mg/L, DOC = 3.4 mg/L 10 days ago: 3.8, 3.5

Hood: TOC = 2.7 mg/L, DOC = 2.5 mg/L 10 days ago: 2.7, 2.5

 

Daily Average Pumping: 1/15 through 1/24

Banks Pumping Plant ... ranged between 1,266 cfs and 1,903 cfs over the time period. The 1/24 average was 1,481 cfs.

Jones Pumping Plant ... ranged between 829 cfs and 1,660 cfs over the time period. The 1/24 average was 1,660 cfs.

Gianelli Pumping Plant ... discharge generation (San Luis Reservoir water moving out of the reservoir into O'Neill Forebay) ranged between zero cfs and zero cfs over the time period. The 1/24 average was zero cfs. Discharge pumping (O'Neill Forebay water moving into San Luis Reservoir) ranged between 786 cfs and 2,262 cfs over the time period. The 1/24 average was 1,573 cfs.

O'Neill Pumping Plant (Federal CVP) ... discharge generation (O'Neill Forebay water moving into the DMC) varied between zero cfs and zero cfs over the time period. The 1/24 average was zero cfs. Discharge pumping (DMC water moving into O'Neill Forebay) ranged between 547 cfs and 1,387 cfs over the time period. The 1/24 average was 1,336 cfs.

Dos Amigos Pumping Plant ... ranged between 426 cfs and 1,492 cfs over the time period. The 1/24 average was 1,375 cfs.

South Bay Pumping Plant ... ranged between 15 cfs and 64 cfs over the time period. The 1/24 average was 44 cfs.

Barker Slough Pumping Plant ... ranged between 44 cfs and 70 cfs over the time period. The 1/24 average was 44 cfs.