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WY2025 Current Conditions for the Stanislaus Watershed Team

Stanislaus Temperature and Flow

Water Year 2025 Stanislaus River flow and water temperatures (daily) since October 1, 2024. Data from GDW, KOT, OBB, RIP stations retrieved from CDEC. Data from USGS gage 11302000 (Canyon) retrieved from NWIS. Figure generated by SacPAS including temperature threshold reference lines.

Current River Conditions

Stanislaus Watershed Select River Conditions for 2025-03-28

  Stanislaus Tuolumne Merced San Joaquin
Location GDW OBB RIP KOT LGN TRW MOD TRT MBH CRS MST NEW MRB VNS MSD OH1
Flow (CFS) 203 a    219    200    267    360    376    393    461    999    902    1228    2682    2641    3337    3670    2491   
Note: a. Data is not available for 2025-03-28. Most recent data up to 5 days prior is reported.
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus Tuolumne Merced San Joaquin
Location OBB RIP RPN MOD CRS VNS MSD OH1
Water Temperature (°F) NA   63.1    63.2    63.4    56.8    65.1    66.0    65.9   
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus Tuolumne Merced San Joaquin
Location SNS TLG MRC SJF
Full Natural Flow (CFS) 3890 a    5984 a    2660 a     
Note: a. Data is not available for 2025-03-28. Most recent data up to 5 days prior is reported.
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus Tuolumne Merced San Joaquin
Location NML DNP EXC MIL
Reservoir Storage (TAF) 1980    1665    745    347   
Res Above Top of Conserv Stor (TAF) -39    -27 a    63 a    -37 a   
Reservoir Inflow (CFS) 1755    4623 a    2632 a    2706 a   
Reservoir Outflow (CFS) 434    1264 a    1729 a    1514 a   
Note: a. Data is not available for 2025-03-28. Most recent data up to 5 days prior is reported.
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus San Joaquin
Location RPN MSD OH1
Dissolved Oxygen (mg/L) 9.4    8.3    8.2   
Click on the icon to view current 60 days plot for location and river conditions.
Data retrieved from CDEC; Current River Conditions tables generated by SacPAS.

Juvenile Sampling

Stacked chart for Caswell Memorial State Park Rotary Screw Traps Daily Catch juvenile lifestages Unmarked Chinook. Top chart: Individual fish fork length (mm) plotted by color and symbol for each Unmarked Chinook lifestage: alevin, fry, parr, silvery parr and smolt. Middle chart: Dates of sampling at Caswell RSTs. Bottom chart: Daily catch juvenile lifestages Unmarked Chinook at Caswell RSTs with Flow at Ripon (in CFS). Caswell RSTs Data from PSMFC retrieved from CalFish and data from RIP station retrieved from CDEC; figure generated by SacPAS.
Stacked chart for Mossdale Trawls Daily Catch juvenile lifestages Marked and Unmarked Chinook. Top chart: Individual fish fork length (mm) plotted by color and symbol for each Chinook lifestage: alevin, fry, parr, silvery parr and smolt. Middle chart: Dates of sampling at Mossdale Trawls. Bottom chart: Daily catch juvenile lifestages Marked and Unmarked Chinook at Mossdale Trawls with Flow at Vernalis (in CFS). Preliminary data from USFWS Lodi and CDEC; subject to revision. Figure generated by SacPAS.

Juvenile Sampling Summary

Juvenile Sampling Summary for 03/15/2025-03/28/2025 (last 14 days) and 03/01/2025-03/14/2025 (previous 14 days)

Date RangeData ItemCaswell Memorial State Park RSTsMossdale TrawlsAntioch Dunes SJ001SEddo's SJ005NMedford Island SJ026SLost Isle SJ032SDad's Point SJ041NDos Reis SJ051EMossdale SJ056EWeatherbee SJ058WBig Beach SJ063WDurham Site SJ068WSturgeon Bend SJ074WTwo Rivers RV Park SJ075ERoute 132 SJ077EN. of Tuol. R. SJ083W
Date RangeData ItemCaswell Memorial State Park RSTsMossdale TrawlsAntioch Dunes SJ001SEddo's SJ005NMedford Island SJ026SLost Isle SJ032SDad's Point SJ041NDos Reis SJ051EMossdale SJ056EWeatherbee SJ058WBig Beach SJ063WDurham Site SJ068WSturgeon Bend SJ074WTwo Rivers RV Park SJ075ERoute 132 SJ077EN. of Tuol. R. SJ083W
03/15/2025-03/28/2025Min Sample Date2025-03-172025-03-192025-03-192025-03-252025-03-252025-03-252025-03-28
03/15/2025-03/28/2025Max Sample Date2025-03-262025-03-192025-03-282025-03-252025-03-252025-03-252025-03-28
03/15/2025-03/28/2025Days with Sampling0000000000000000
03/15/2025-03/28/2025Fall Chinook101060131
03/15/2025-03/28/2025Spring Chinook2000020
03/15/2025-03/28/2025Winter Chinook0000000
03/15/2025-03/28/2025LateFall Chinook0000000
03/15/2025-03/28/2025Chinook (ad-clip)0000000
03/15/2025-03/28/2025Steelhead (natural)0000000
03/15/2025-03/28/2025Steelhead (ad-clip)0000000
03/15/2025-03/28/2025Avg Flow (cfs)380.14040.5
03/15/2025-03/28/2025Avg Water Temp (F)32.059.555.255.559.761.560.865.8
03/15/2025-03/28/2025Avg Turbidity (NTU)46.6
03/01/2025-03/14/2025Min Sample Date2025-03-03
03/01/2025-03/14/2025Max Sample Date2025-03-14
03/01/2025-03/14/2025Days with Sampling0000000000000000
03/01/2025-03/14/2025Fall Chinook0
03/01/2025-03/14/2025Spring Chinook0
03/01/2025-03/14/2025Winter Chinook0
03/01/2025-03/14/2025LateFall Chinook0
03/01/2025-03/14/2025Chinook (ad-clip)0
03/01/2025-03/14/2025Steelhead (natural)0
03/01/2025-03/14/2025Steelhead (ad-clip)0
03/01/2025-03/14/2025Avg Flow (cfs)206.11812.5
03/01/2025-03/14/2025Avg Water Temp (F)32.057.9
03/01/2025-03/14/2025Avg Turbidity (NTU)19.7
source of Avg Flow (cfs)Ripon USGS (RIP)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)Vernalis (VNS)
source of Avg Water Temp (F)Caswell RSTVernalis (VNS)Antioch DunesEddo'sMedford IslandLost IsleDad's PointDos ReisMossdaleWeatherbeeBig BeachDurham SiteSturgeon BendTwo Rivers RV ParkRoute 132N. of Tuol. R.
source of Avg Turbidity (NTU)Caswell RSTsMossdale TrawlsAntioch DunesEddo'sMedford IslandLost IsleDad's PointDos ReisMossdaleWeatherbeeBig BeachDurham SiteSturgeon BendTwo Rivers RV ParkRoute 132N. of Tuol. R.
  • Caswell Memorial State Park RSTs: Preliminary data from PSMFC via CalFish and CDEC; subject to revision.
  • Mossdale Trawls: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Antioch Dunes Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Eddo's Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Medford Island Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Lost Isle Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Dad's Point Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Dos Reis Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Mossdale Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Weatherbee Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Big Beach Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Durham Site Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Sturgeon Bend Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Two Rivers RV Park Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Route 132 Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • N. of Tuol. R. Beach Seine: Preliminary data from USFWS Lodi and CDEC; subject to revision.
  • Averages: calculated for all non-null data points within the 7 day reporting period.
Data retrieved from PSMFC via CalFish, CDEC, DatCall email distribution. Figure and Table generated by SacPAS.

60-Day Water Temperature Daily Min, Max, Average Figures

Stacked chart for daily water temperatures Stanislaus River upstream of Knights Ferry for current 60 days period. Top chart: Daily Min, Max and average water temperatures (in degrees Fahrenheit). Bottom chart: Daily difference between Max and Min measured water temperature in degrees Fahrenheit. Data from USGS gage 11302000 retrieved from NWIS; figure generated by SacPAS (including date-based water temperature threshold reference lines).
Stacked chart for daily water temperatures Stanislaus River at Orange Blossom Bridge for current 60 days period. Top chart: Daily Min, Max and average water temperatures (in degrees Fahrenheit). Bottom chart: Daily difference between Max and Min measured water temperature in degrees Fahrenheit. Data from OBB station retrieved from CDEC; figure generated by SacPAS (including date-based water temperature threshold reference lines).
Stacked chart for daily water temperatures Stanislaus River at Ripon for current 60 days period. Top chart: Daily Min, Max and average water temperatures (in degrees Fahrenheit). Bottom chart: Daily difference between Max and Min measured water temperature in degrees Fahrenheit. Data from USGS RIP station retrieved from CDEC; figure generated by SacPAS (including date-based water temperature threshold reference lines).
Stacked chart for daily water temperatures San Joaquin River near Vernalis for current 60 days period. Top chart: Daily Min, Max and average water temperatures (in degrees Fahrenheit). Bottom chart: Daily difference between Max and Min measured water temperature in degrees Fahrenheit. Data from VNS station retrieved from CDEC; figure generated by SacPAS (including date-based water temperature threshold reference lines).

Historical & Current Water Temperature Figures

Historical daily water temperatures from 2007 to present date, Stanislaus River upstream of Knights Ferry for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. Water temperatures in degrees Fahrenheit are color-coded by threshold reference categories (1) steelhead alevins below 54 degrees Fahrenheit, (2) steelhead juveniles (suboptimal) above 68 degrees Fahrenheit, and (3) degrees Fahrenheit between the two. Temperature based coding is for reference only; fish are not present for all dates or all locations. Data from USGS gage 11302000 retrieved from NWIS; figure generated by SacPAS.
Historical daily water temperatures (in degrees Fahrenheit) from 2007 to present date, Stanislaus River upstream of Knights Ferry for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. For all data presented, the minimum Date Period Mean is plotted as Black dotted line. For all data presented, the maximum Date Period Mean is plotted as Black dashed line. Current year is indicated by Black bold solid line. Data from USGS gage 11302000 retrieved from NWIS; figure generated by SacPAS.
Historical daily water temperatures from 2000 to present date, Stanislaus River at Orange Blossom Bridge for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. Water temperatures in degrees Fahrenheit are color-coded by threshold reference categories (1) steelhead alevins below 54 degrees Fahrenheit, (2) steelhead juveniles (suboptimal) above 68 degrees Fahrenheit, and (3) degrees Fahrenheit between the two. Temperature based coding is for reference only; fish are not present for all dates or all locations. Data from OBB station retrieved from CDEC; figure generated by SacPAS.
Historical daily water temperatures (in degrees Fahrenheit) from 2000 to present date, Stanislaus River at Orange Blossom Bridge for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. For all data presented, the minimum Date Period Mean is plotted as Black dotted line. For all data presented, the maximum Date Period Mean is plotted as Black dashed line. Current year is indicated by Black bold solid line. Data from OBB station retrieved from CDEC; figure generated by SacPAS.
Historical daily water temperatures from 2011 to present date, Stanislaus River at Ripon for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. Water temperatures in degrees Fahrenheit are color-coded by threshold reference categories (1) steelhead alevins below 54 degrees Fahrenheit, (2) steelhead juveniles (suboptimal) above 68 degrees Fahrenheit, and (3) degrees Fahrenheit between the two. Temperature based coding is for reference only; fish are not present for all dates or all locations. Data from USGS RIP gage retrieved from CDEC; figure generated by SacPAS.
Historical daily water temperatures (in degrees Fahrenheit) from 2011 to present date, Stanislaus River at Ripon for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. For all data presented, the minimum Date Period Mean is plotted as Black dotted line. For all data presented, the maximum Date Period Mean is plotted as Black dashed line. Current year is indicated by Black bold solid line. Data from USGS RIP gage retrieved from CDEC; figure generated by SacPAS.
Historical daily water temperatures from 2014 to present date, San Joaquin River near Vernalis for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. Water temperatures in degrees Fahrenheit are color-coded by threshold reference categories (1) steelhead alevins below 54 degrees Fahrenheit, (2) steelhead juveniles (suboptimal) above 68 degrees Fahrenheit, and (3) degrees Fahrenheit between the two. Temperature based coding is for reference only; fish are not present for all dates or all locations. Data from VNS station retrieved from CDEC; figure generated by SacPAS.
Historical daily water temperatures (in degrees Fahrenheit) from 2014 to present date, San Joaquin River near Vernalis for 60 day window before and after "current calendar date". Each "year" is the calendar year for the first date in the 121 day period. For all data presented, the minimum Date Period Mean is plotted as Black dotted line. For all data presented, the maximum Date Period Mean is plotted as Black dashed line. Current year is indicated by Black bold solid line. Data from VNS station retrieved from CDEC; figure generated by SacPAS.

Hourly Dissolved Oxygen

Chart for hourly dissolved oxygen (mg/L) Stanislaus River at Ripon and San Joaquin River near Vernalis for current 30 days period. Data from stations RPN and SJR on CDEC; figure generated by SacPAS.

Stanislaus River Flows

Stanislaus River flows for current 60 day period. Data from GDW, OBB, RIP, and KOT stations on CDEC; figure generated by SacPAS.

Goodwin Dam Spillway Discharge

Goodwin (daily) releases to the Stanislaus River since October 1 (water year). Data from GDW station on CDEC; figure generated by SacPAS.

Unimpaired Flow

Unimpaired flow is monitored February through June at specific locations in the Stanislaus, Tuolumne, and Merced rivers.

Plot of unimpaired flows Stanislaus River, February through June. Period accumulated Acre Feet values are an estimate based on converting daily average CFS to daily acre feet (cfs*1.9835) and summing for the period February 1 - June 30. Data from Stanislaus R Goodwin (SNS) and Stanislaus R at Koetitz Ranch (KOT) stations retrieved from CDEC; figure generated by SacPAS (including estimated accumulated flow volume and percent).
Plot of unimpaired flows Tuolumne River, February through June. Period accumulated Acre Feet values are an estimate based on converting daily average CFS to daily acre feet (cfs*1.9835) and summing for the period February 1 - June 30. Data from Tuolumne R La Grange Dam (TLG) and Tuolumne R at Modesto (MOD) stations retrieved from CDEC; figure generated by SacPAS (including estimated accumulated flow volume and percent).
Plot of unimpaired flows Merced River, February through June. Period accumulated Acre Feet values are an estimate based on converting daily average CFS to daily acre feet (cfs*1.9835) and summing for the period February 1 - June 30. Data from New Exchequer Lake McClure (EXC) and Merced R near Stevinson (MST) stations retrieved from CDEC; figure generated by SacPAS (including estimated accumulated flow volume and percent).

Data Locations Map

Google Custom Map for SWT related river conditions and juvenile sampling locations (not linked to data queries). On the map, click on to open the side navigation panel and to open the full-size map in a new window/tab.

WY2025 Mossdale Trawls Juvenile Chinook Sampling

DateSpeciesCatchFork Length (mm) Markcode Lifestage
DateSpeciesCatchFork Length (mm) Markcode Lifestage
2025-02-18Chinook136Nonefry
2025-02-18Chinook136Nonefry
2025-02-21Chinook139Nonefry
2025-03-10Chinook182AdClippedsilvery parr
2025-03-10Chinook199AdClippedsmolt
2025-03-12Chinook186AdClippedsmolt
2025-03-12Chinook190AdClippedsmolt
2025-03-17Chinook199AdClippedsilvery parr
2025-03-17Chinook1101AdClippedsmolt
2025-03-19Chinook189AdClippedsmolt
2025-03-19Chinook194AdClippedsmolt
2025-03-19Chinook1102AdClippedsmolt
2025-03-21Chinook148Nonefry
2025-03-21Chinook178Nonesmolt
2025-03-21Chinook190AdClippedsmolt
2025-03-21Chinook191AdClippedsmolt
2025-03-21Chinook193AdClippedsmolt
2025-03-24Chinook184AdClippedsilvery parr
2025-03-24Chinook189AdClippedsilvery parr
2025-03-24Chinook189AdClippedsilvery parr
2025-03-24Chinook198AdClippedsilvery parr
2025-03-24Chinook189AdClippedsmolt
2025-03-24Chinook190Nonesmolt
2025-03-24Chinook191AdClippedsmolt
2025-03-24Chinook195AdClippedsmolt
2025-03-24Chinook1101AdClippedsmolt
2025-03-24Chinook1101AdClippedsmolt
2025-03-26Chinook159AdClippedparr
2025-03-26Chinook285AdClippedsilvery parr
2025-03-26Chinook186AdClippedsilvery parr
2025-03-26Chinook186AdClippedsilvery parr
2025-03-26Chinook186AdClippedsilvery parr
2025-03-26Chinook188AdClippedsilvery parr
2025-03-26Chinook191AdClippedsilvery parr
2025-03-26Chinook196AdClippedsilvery parr
2025-03-26Chinook197AdClippedsilvery parr
2025-03-26Chinook198AdClippedsilvery parr
2025-03-26Chinook189AdClippedsmolt
2025-03-26Chinook190AdClippedsmolt

Preliminary data from USFWS Lodi; subject to revision. Table generated by SacPAS.
Data Notes

Content on this page is updated daily and includes the most up-to-date datasets contained in the SacPAS database.

SacPAS Related Queries and Tools: