1/21/2019

10 Day Northern California Precipitation Forecast: 70% chance on 1/21, 20% chance on 1/22, 10% chance on 1/23, 10% chance on 1/24, 70% chance on 1/25, 80% chance on 1/26, 30% chance on 1/27, 20% chance on 1/28, 10% chance on 1/29 and a 20% chance on 1/30. Ski area summit snow levels ranged between 24 and 111 inches.

 

From CDEC: Precipitation to date for water year 2019-2020 - As of 1/21/2020:

Northern Sierra Precipitation Index: 15.4" - 62% of average for this date

San Joaquin Precipitation Index: 10.6" - 59% of average for this date

Tulare Basin Precipitation Index: 8.1" - 64% of average for this date

From CDEC: Average statewide snow water equivalents as of 1/21/2020:

North: 12.6" - 80% of normal for this date

Central: 12.2" - 75% of normal for this date

South: 9.7" - 78% of normal for this date

Statewide: 11.6" - 79% of normal for this date


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

Sacramento River (Freeport)

The daily average reported 16,319 cfs on 1/20 and is expected to remain about the same through 1/26.

Feather River (at Boyd's Landing)

The Feather is currently reporting 3,128 cfs and may decrease to 2,846 cfs on 1/25 then possibly increase to 3,023 cfs by 1/26.

San Joaquin River (near Vernalis)

The San Joaquin is reporting 2,263 cfs and may decrease to 2,050 cfs by 1/26.


Delta Cross Channel Gate Operation

Posted: 11/27/2019

Delta Cross Channel Gates will CLOSE on Sunday December 1, 2019 at approximately 0900 hrs.

Comment: NMFS BO Action IV.1.2 Dec 1 seasonal closure.

Action: During the period between November 1 and June 15, DCC gate operations will be
modified from the proposed action to reduce loss of emigrating salmonids and green
sturgeon. The operating criteria provide for longer periods of gate closures during the
emigration season to reduce direct and indirect mortality of yearling spring-run, winter-run,
and CV steelhead. From December 1 to January 31, the gates will remain closed, except as
operations are allowed.

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)

Conditions over the past 10 days kept EC and bromide values very stable. There was a brief decrease at Vernalis on 1/19 and 1/20 due to an increase in SJR flow but both are back to pre 1/19 levels. Based on forecasted precipitation and January fishery related flow changes in the SJR, things will most likely stay about the same or possibly decrease a bit.

Banks Daily Average: EC - 467 uS/cm, Br - 0.15 mg/L, 10 Days ago: 455 uS/cm and 0.20 mg/L

Jones Daily Average: EC - 528 uS/cm, Br - 0.18 mg/L, 10 days ago: 566 uS/cm, 0.21 mg/L

Clifton Court Forebay Daily Average: EC - 462 uS/cm, 10 days ago: 530 uS/cm

Vernalis: EC - 652 uS/cm, Br - 0.20 mg/L, 10 days ago: 689 uS/cm and 0.23 mg/L

Gianelli: EC - 480 uS/cm, Br - 0.22 mg/L, 10 days ago: 472 uS/cm and 0.23 mg/L

Hood: EC - 177 uS/cm, 10 days ago: 189 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

Same as last week, carbon levels remained stable over the time period. Expect them to increase a bit if the coming precipitation is enough to increase flows into the Delta.

Banks: Estimated TOC = 4.0 mg/L, Estimated DOC - 3.8 mg/L - 10 days ago: 4.1, 3.9 (The carbon analyzer is down and will be until new parts arrive.)

Jones: TOC = 4.0 mg/L, DOC - 3.6 mg/L, 10 days ago: 4.0, 3.8

Vernalis: TOC = 3.2 mg/L, DOC = 3.1 mg/L, 10 days ago: 3.1, 2.8

Gianelli: TOC = 4.1 mg/L, DOC = 3.9 mg/L, 10 days ago: 4.1, 3.8

Hood: TOC = 2.1 mg/L, DOC = 1.8 mg/L, 10 days ago 2.1, 1.9

 

Daily Average Pumping: 1/10 through 1/19

Banks Pumping Plant ... ranged between 1,922 cfs and 2,618 cfs over the time period. The 1/19 average was 2,618 cfs.

Jones Pumping Plant ... ranged between 2,112 cfs and 4,266 cfs over the time period. The 1/19 average was 4,184 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 1/19 average was zero cfs. Discharge pumping (O'Neill Forebay water moving into San Luis Reservoir) ranged between 3,263 cfs and 5,326 cfs over the time period. The 1/19 average was 3,873 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 1/19 average was zero cfs. Discharge pumping (DMC water moving into O'Neill Forebay) ranged between 3,113 cfs and 3,556 cfs over the time period. The 1/19 average was 3,216 cfs.

Dos Amigos Pumping Plant ... ranged between 420 cfs and 2,245 cfs over the time period. The 1/19 average was 2,245 cfs.

South Bay Pumping Plant ... ranged between 48 cfs and 210 cfs over the time period. The 1/19 average was 48 cfs.

Barker Slough Pumping Plant ... ranged between 22 cfs and 31 cfs over the time period. The 1/19 average was 25 cfs.