5/19/2025

10-Day General Northern California Precipitation Forecast:

The weather forecast for the next ten days are sunny with highs in the low 90's to the low 80's.

From CDEC: Precipitation to date for water year 2024-2025 - as of 5/19/2025:

Northern Sierra Precipitation: 8-Station Index: 54.8" = 109% of average for this date

San Joaquin Precipitation: 5-Station Index: 26.3" = 69% of average for this date

Tulare Basin Precipitation: 6-Station Index: 22.8" = 85% of average for this date

From CDEC: Average Statewide Snow Water Content Equivalents as of 5/19/2025:

North: 5.5" = 50% of normal for this date

Central: 5.7" = 43% of normal for this date

South: 1.7" = 18% of normal for this date

Statewide: 4.8" = 41% 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/ Freeport Bridge)

The 5/19/2025 daily average flow was 16,708 cfs and the average flow is expected to increase to 20,408 cfs through 5/24/2025.

Feather River (at Boyd's Landing)

As of 5/19/2025, the Feather River flow is 4,557 cfs and is expected to remain relatively unchanged at 4,617 cfs by 5/24/2025.

San Joaquin River (near Vernalis)

As of 5/19/2025, the San Joaquin River flow is 2,515 cfs and is expected to decrease to 1,796 cfs by 5/24/2025.

Latest Delta Cross Channel Gate Operation (From the USBR website)

Posted: 11/21/2024

Delta Cross Channel gates are closed and will remain closed until further notice.

Comment: Anticipation of high flows.

Note 1: Gates may be operated/closed on short notice for fishery protection in the November to January timeframe.

Note 2: Gate operations may take approx 30 minutes to complete, so boats may not be permitted to pass through the gates until approx 30 minutes after the scheduled opening time. Boat passage may be cut off approximately 30 minutes prior to the scheduled closing time.

EC and Bromide:

Banks: EC = 345.5432 uS/cm, Br = 0.1102 mg/L. 10 days ago: EC = 332.3819 uS/cm, Br = 0.0922 mg/L.

Jones: EC = 473 uS/cm, Br = N/A mg/L. 10 days ago: EC = 344 uS/cm, Br = N/A mg/L.

Clifton Court Forebay: EC = 342.6 uS/cm, Br = N/A mg/L. 10 days ago: EC = 345.8 uS/cm, Br = N/A mg/L.

Vernalis: EC = 267 uS/cm, Br = 0.1092 mg/L. 10 days ago: EC = 361 uS/cm, Br = 0.1308 mg/L.

Gianelli: EC = N/A uS/cm, Br = 0.1487 mg/L. 10 days ago: EC = N/A uS/cm, Br = 0.1519 mg/L.

Organic Carbon, TOC and DOC:

Banks: TOC = 3.71 mg/L, DOC = 3.06 mg/L. 10 days ago: TOC = 3.88 mg/L, DOC = 3.37 mg/L.

Jones: TOC = 3.33 mg/L, DOC = 2.95 mg/L. 10 days ago: TOC = 3.14 mg/L, DOC = 2.94 mg/L.

Vernalis: TOC = 2.88 mg/L, DOC = 2.25 mg/L. 10 days ago: TOC = 3.3 mg/L, DOC = 2.95 mg/L.

Gianelli: TOC = 3.33 mg/L, DOC = 3.42 mg/L. 10 days ago: TOC = 3.26 mg/L, DOC = 3.39 mg/L.

Daily Average Pumping: 5/9 through 5/18

Banks Pumping Plant ... ranged between zero cfs and 1,159 cfs over the time period. The 5/18 average was 620 cfs.

Jones Pumping Plant ... ranged between 899 cfs and 1,267 cfs over the time period. The 5/18 average was 906 cfs.

Gianelli Pumping Plant ... discharge generation (San Luis Reservoir water moving out of the reservoir into O'Neill Forebay) ranged between 5,209 cfs and 7,533 cfs over the time period. The 5/18 average was 5,209 cfs.
Discharge pumping (O'Neill Forebay water moving into San Luis Reservoir) ranged between zero cfs and zero cfs over the time period. The 5/18 average was zero cfs.

O'Neill Pumping Plant (Federal CVP) ... discharge generation (O'Neill Forebay water moving into the DMC) varied between 618 cfs and 2,222 cfs over the time period. The 5/18 average was 1,124 cfs.
Discharge pumping (DMC water moving into O'Neill Forebay) ranged between zero cfs and 125 cfs over the time period. The 5/18 average was zero cfs.

Dos Amigos Pumping Plant ... ranged between 4,015 cfs and 7,022 cfs over the time period. The 5/18 average was 4,489 cfs.

South Bay Pumping Plant ... ranged between zero cfs and 308 cfs over the time period. The 5/18 average was 225 cfs.

Barker Slough Pumping Plant ... ranged between zero cfs and 80 cfs over the time period. The 5/18 average was 66 cfs.

Status of the Temporary Barriers as of 5/19/2025

Middle River Barrier

Mobilization to the site occurred on April 30. In-water work to construct the weir started on May 5 at 10:30 a.m. and was completed on May 9 at 9:30 a.m. Flap gates will remain tied open until further notice.

Old River near Tracy Barrier

Mobilization to the site occurred on April 30. In-water work started on May 1 at 10 a.m. Currently, the contractor is building the boat ramp. The barrier is scheduled to be closed on May 21. Flap gates will remain tied open until further notice. Boat portage will be available upon closure and provided daily including holidays from 8 a.m. to 6 p.m. Monday to Friday and from 7 a.m. to 7 p.m. on weekends.