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In Development -- WY2023 Current Conditions for the Stanislaus Watershed Team -- ARCHIVE

Go To: Stanislaus Temperature and Flow || Juvenile Sampling || Current River Conditions || Water Temperature Min, Max, Average || Water Temperature Historical || Goodwin Dam Spillway Discharge

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:

Stanislaus Temperature and Flow

graph Water Temperature and Flow at multiple locations in Stanislaus Watershed
Water Year 2023 Stanislaus River flow and water temperatures (daily) since October 1, 2022. 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.

Juvenile Sampling

chart Caswell Memorial State Park Rotary Screw Traps Daily Catch juvenile lifestages Chinook
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.
chart Mossdale Trawls Daily Catch juvenile lifestages Chinook
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.

2023 Mossdale Trawls Juvenile Chinook Sampling

DateSpeciesCatchFork Length (mm) Markcode Lifestage
DateSpeciesCatchFork Length (mm) Markcode Lifestage
2023-01-03Chinook133Nonealevin
2023-01-03Chinook135Nonealevin
2023-01-03Chinook1190AdClippedsmolt
2023-01-04Chinook136Nonefry
2023-01-06Chinook135Nonealevin
2023-01-11Chinook132Nonefry
2023-01-11Chinook135Nonefry
2023-01-17Chinook136Nonefry
2023-01-18Chinook136Nonealevin
2023-01-18Chinook135Nonefry
2023-01-18Chinook136Nonefry
2023-01-20Chinook135Nonealevin
2023-02-03Chinook136Nonefry
2023-02-10Chinook140Noneparr
2023-03-13Chinook139Noneparr
2023-04-24Chinook1107AdClippedsmolt
2023-04-25Chinook1120AdClippedsmolt
2023-04-27Chinook1110AdClippedsmolt
2023-05-02Chinook1109N/Psmolt
2023-05-04Chinook1107N/Psmolt
2023-05-04Chinook1111AdClippedsmolt
2023-05-05Chinook192N/Psmolt
2023-05-05Chinook192N/Psmolt
2023-05-05Chinook199N/Psmolt
2023-05-05Chinook1107N/Psmolt
2023-05-06Chinook1103N/Psmolt
2023-05-06Chinook1105N/Psmolt
2023-05-06Chinook1110N/Psmolt
2023-05-06Chinook1114N/Psmolt
2023-05-06Chinook1116N/Psmolt
2023-05-06Chinook1117N/Psmolt
2023-05-08Chinook180N/P
2023-05-08Chinook182N/P
2023-05-08Chinook183N/P
2023-05-08Chinook196N/P
2023-05-09Chinook197N/Psmolt
2023-05-11Chinook1105N/Psmolt
2023-05-12Chinook186N/P
2023-05-12Chinook1112N/Psmolt
2023-05-13Chinook1110N/Psmolt
2023-05-13Chinook1114N/Psmolt
2023-05-13Chinook1122N/Psmolt
2023-05-15Chinook170N/P
2023-05-15Chinook1101N/Psmolt
2023-05-15Chinook1105N/Psmolt
2023-05-15Chinook1112N/Psmolt
2023-05-16Chinook168N/P
2023-05-16Chinook183N/P
2023-05-18Chinook167N/P
2023-05-18Chinook173N/P
2023-05-18Chinook177n/p
2023-05-18Chinook191N/P
2023-05-18Chinook191N/Psmolt
2023-05-18Chinook198N/Psmolt
2023-05-18Chinook1112N/Psmolt
2023-05-19Chinook180N/Psmolt
2023-05-19Chinook180N/Psmolt
2023-05-20Chinook177N/Psmolt
2023-05-20Chinook182N/Psmolt
2023-05-20Chinook1100N/Psmolt
2023-05-20Chinook1107N/Psmolt
2023-05-20Chinook1110N/Psmolt
2023-05-20Chinook1110N/Psmolt
2023-05-20Chinook1111N/Psmolt
2023-05-20Chinook1111N/Psmolt
2023-05-20Chinook1120N/Psmolt
2023-05-20Chinook1121N/Psmolt
2023-05-20Chinook1128N/Psmolt

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

Updated: Thursday, 08-Jun-2023 17:28:02 PDT

Juvenile Sampling Summary for 09/15/2023-09/28/2023 (last 14 days) and 09/01/2023-09/14/2023 (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
09/15/2023-09/28/2023Min Sample Date2023-09-152023-09-182023-09-212023-09-152023-09-21
09/15/2023-09/28/2023Max Sample Date2023-09-222023-09-182023-09-212023-09-212023-09-21
09/15/2023-09/28/2023Days with Sampling0000000000000000
09/15/2023-09/28/2023Fall Chinook00000
09/15/2023-09/28/2023Spring Chinook00000
09/15/2023-09/28/2023Winter Chinook00000
09/15/2023-09/28/2023LateFall Chinook00000
09/15/2023-09/28/2023Chinook (ad-clip)00000
09/15/2023-09/28/2023Steelhead (natural)00000
09/15/2023-09/28/2023Steelhead (ad-clip)00000
09/15/2023-09/28/2023Avg Flow (cfs)
09/15/2023-09/28/2023Avg Water Temp (F)32.070.070.072.372.470.3
09/15/2023-09/28/2023Avg Turbidity (NTU)16.621.235.013.116.0
09/01/2023-09/14/2023Min Sample Date2023-09-012023-09-072023-09-072023-09-07
09/01/2023-09/14/2023Max Sample Date2023-09-132023-09-132023-09-072023-09-07
09/01/2023-09/14/2023Days with Sampling0000000000000000
09/01/2023-09/14/2023Fall Chinook0000
09/01/2023-09/14/2023Spring Chinook0000
09/01/2023-09/14/2023Winter Chinook0000
09/01/2023-09/14/2023LateFall Chinook0000
09/01/2023-09/14/2023Chinook (ad-clip)0000
09/01/2023-09/14/2023Steelhead (natural)0000
09/01/2023-09/14/2023Steelhead (ad-clip)0000
09/01/2023-09/14/2023Avg Flow (cfs)673.62545.8
09/01/2023-09/14/2023Avg Water Temp (F)32.069.872.172.771.1
09/01/2023-09/14/2023Avg Turbidity (NTU)20.915.417.428.1
source of Avg Flow (cfs)Ripon USGS (RIP)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.

Data retrieved from PSMFC via CalFish, CDEC, DatCall email distribution. Figure and Table generated by SacPAS.

Updated: Friday, 29-Sep-2023 16:19:00 PDT

Current River Conditions

Stanislaus Watershed Select River Conditions for 2023-09-28

  Stanislaus Tuolumne Merced San Joaquin
Location GDW OBB RIP KOT LGN TRW MOD TRT MBH CRS MST NEW MRB VNS MSD OH1
Flow (CFS) 318 a                              
Note: a. Data is not available for 2023-09-28. Most recent data up to 5 days prior is reported.

  Stanislaus Tuolumne Merced San Joaquin
Location OBB RIP RPN MOD CRS VNS MSD OH1
Water Temperature (°F) 56.6 62.9 64.0 64.1 65.5 67.9 68.9 68.7

  Stanislaus Tuolumne San Joaquin
Location GDW TLG SJF
Full Natural Flow (CFS)      

  Stanislaus Tuolumne Merced San Joaquin
Location NML DNP EXC MIL
Reservoir Storage (TAF) 1897 1722 753 220
Res Above Top of Conserv Stor (TAF) -404 a -80 a -116 a -298 a
Reservoir Inflow (CFS)        
Reservoir Outflow (CFS)        
Note: a. Data is not available for 2023-09-28. Most recent data up to 5 days prior is reported.

  Stanislaus San Joaquin
Location RPN MSD OH1
Dissolved Oxygen (mg/L) 9.3 8.5 8.5

Data retrieved from CDEC; Current River Conditions tables generated by SacPAS.

Updated: Friday, 29-Sep-2023 06:59:00 PDT

Water Temperature Min, Max, Average

chart Daily Min Max Average Water Temperature below Goodwin Dam for 60 days
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).

Extended Date Range Charts

chart Daily Min Max Average Water Temperature Orange Blossom Bridge for 60 days
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).

Extended Date Range Charts

chart Daily Min Max Average Water Temperature Ripon for 60 days
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).

Extended Date Range Charts

chart Daily Min Max Average Water Temperature Vernalis for 60 days
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).

Extended Date Range Charts

Water Temperature Historical

graph historical Water Temperature Goodwin Dam with temperature thresholds
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.
graph historical Water Temperature Goodwin Dam years overlayed
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.
graph historical Water Temperature Orange Blossom Bridge with temperature thresholds
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.
graph historical Water Temperature Orange Blossom Bridge years stacked
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.
graph historical Water Temperature Ripon with temperature thresholds
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.
graph historical Water Temperature Ripon years stacked
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.
graph historical Water Temperature Vernalis with temperature thresholds
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.
graph historical Water Temperature Vernalis years stacked
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.

Goodwin Dam Spillway Discharge

graph 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.

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Wednesday, 04-Oct-2023 09:52:43 PDT