WY2025 Current Conditions for the Stanislaus Watershed Team SWT: SacPAS Sacramento Prediction and Assessment of Salmon and other fishes

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 2025-04-06

	Stanislaus				Tuolumne				Merced			San Joaquin
Location	GDW	OBB	RIP	KOT	LGN	TRW	MOD	TRT	MBH	CRS	MST	NEW	MRB	VNS	MSD	OH1
Flow (CFS)	401 ^a	419	313	438	360	380	412	416	260	212	305	1432	1981	2428	2712	1848

Note: a. Data is not available for 2025-04-06. 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)	55.8	60.4	61.3	62.1	61.9	63.3	64.0	63.9

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)	2222 ^a	3655 ^a	2121 ^a

Note: a. Data is not available for 2025-04-06. 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)	1996	1720	765	365
Res Above Top of Conserv Stor (TAF)	-79	18 ^a	59 ^a	-34 ^a
Reservoir Inflow (CFS)	1569	4066 ^a	1584 ^a	2127 ^a
Reservoir Outflow (CFS)	729	1209 ^a	892 ^a	1169 ^a

Note: a. Data is not available for 2025-04-06. 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)	9.8	8.9	8.9

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 03/24/2025-04/06/2025 (last 14 days) and 03/10/2025-03/23/2025 (previous 14 days)

Date Range	Data Item	Caswell Memorial State Park RSTs	Mossdale Trawls	Antioch Dunes SJ001S	Eddo's SJ005N	Medford Island SJ026S	Lost Isle SJ032S	Dad's Point SJ041N	Dos Reis SJ051E	Mossdale SJ056E	Weatherbee SJ058W	Big Beach SJ063W	Durham Site SJ068W	Sturgeon Bend SJ074W	Two Rivers RV Park SJ075E	Route 132 SJ077E	N. of Tuol. R. SJ083W
Date Range	Data Item	Caswell Memorial State Park RSTs	Mossdale Trawls	Antioch Dunes SJ001S	Eddo's SJ005N	Medford Island SJ026S	Lost Isle SJ032S	Dad's Point SJ041N	Dos Reis SJ051E	Mossdale SJ056E	Weatherbee SJ058W	Big Beach SJ063W	Durham Site SJ068W	Sturgeon Bend SJ074W	Two Rivers RV Park SJ075E	Route 132 SJ077E	N. of Tuol. R. SJ083W
03/24/2025-04/06/2025	Min Sample Date		2025-03-24		2025-03-28	2025-03-25	2025-03-25	2025-03-25	2025-03-28			2025-04-03
03/24/2025-04/06/2025	Max Sample Date		2025-04-03		2025-03-28	2025-03-25	2025-03-25	2025-03-25	2025-04-03			2025-04-03
03/24/2025-04/06/2025	Days with Sampling	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
03/24/2025-04/06/2025	Fall Chinook		0		2	6	0	13	4			0
03/24/2025-04/06/2025	Spring Chinook		18		0	0	0	2	0			0
03/24/2025-04/06/2025	Winter Chinook		1		0	0	0	0	0			0
03/24/2025-04/06/2025	LateFall Chinook		0		0	0	0	0	0			0
03/24/2025-04/06/2025	Chinook (ad-clip)		0		0	0	0	0	0			0
03/24/2025-04/06/2025	Steelhead (natural)		0		0	0	0	0	0			0
03/24/2025-04/06/2025	Steelhead (ad-clip)		0		0	0	0	0	0			0
03/24/2025-04/06/2025	Avg Flow (cfs)	230.1	3103.5
03/24/2025-04/06/2025	Avg Water Temp (F)	32.0	62.7		58.3	59.7	61.5	60.8	63.4			60.1
03/24/2025-04/06/2025	Avg Turbidity (NTU)		33.7
03/10/2025-03/23/2025	Min Sample Date		2025-03-10	2025-03-19	2025-03-19
03/10/2025-03/23/2025	Max Sample Date		2025-03-21	2025-03-19	2025-03-19
03/10/2025-03/23/2025	Days with Sampling	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
03/10/2025-03/23/2025	Fall Chinook		1	0	8
03/10/2025-03/23/2025	Spring Chinook		1	0	0
03/10/2025-03/23/2025	Winter Chinook		0	0	0
03/10/2025-03/23/2025	LateFall Chinook		0	0	0
03/10/2025-03/23/2025	Chinook (ad-clip)		0	0	0
03/10/2025-03/23/2025	Steelhead (natural)		0	0	0
03/10/2025-03/23/2025	Steelhead (ad-clip)		0	0	0
03/10/2025-03/23/2025	Avg Flow (cfs)	383.9	3439.8
03/10/2025-03/23/2025	Avg Water Temp (F)	32.0	57.3	55.2	54.3
03/10/2025-03/23/2025	Avg Turbidity (NTU)		43.4
	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 RST	Vernalis (VNS)	Antioch Dunes	Eddo's	Medford Island	Lost Isle	Dad's Point	Dos Reis	Mossdale	Weatherbee	Big Beach	Durham Site	Sturgeon Bend	Two Rivers RV Park	Route 132	N. of Tuol. R.
	source of Avg Turbidity (NTU)	Caswell RSTs	Mossdale Trawls	Antioch Dunes	Eddo's	Medford Island	Lost Isle	Dad's Point	Dos Reis	Mossdale	Weatherbee	Big Beach	Durham Site	Sturgeon Bend	Two Rivers RV Park	Route 132	N. 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

Stanislaus River Flows

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 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

Date	Species	Catch	Fork Length (mm)	Markcode	Lifestage
Date	Species	Catch	Fork Length (mm)	Markcode	Lifestage
2025-02-18	Chinook	1	36	None	fry
2025-02-18	Chinook	1	36	None	fry
2025-02-21	Chinook	1	39	None	fry
2025-03-10	Chinook	1	82	AdClipped	silvery parr
2025-03-10	Chinook	1	99	AdClipped	smolt
2025-03-12	Chinook	1	86	AdClipped	smolt
2025-03-12	Chinook	1	90	AdClipped	smolt
2025-03-17	Chinook	1	99	AdClipped	silvery parr
2025-03-17	Chinook	1	101	AdClipped	smolt
2025-03-19	Chinook	1	89	AdClipped	smolt
2025-03-19	Chinook	1	94	AdClipped	smolt
2025-03-19	Chinook	1	102	AdClipped	smolt
2025-03-21	Chinook	1	48	None	fry
2025-03-21	Chinook	1	78	None	smolt
2025-03-21	Chinook	1	90	AdClipped	smolt
2025-03-21	Chinook	1	91	AdClipped	smolt
2025-03-21	Chinook	1	93	AdClipped	smolt
2025-03-24	Chinook	1	84	AdClipped	silvery parr
2025-03-24	Chinook	1	89	AdClipped	silvery parr
2025-03-24	Chinook	1	89	AdClipped	silvery parr
2025-03-24	Chinook	1	98	AdClipped	silvery parr
2025-03-24	Chinook	1	89	AdClipped	smolt
2025-03-24	Chinook	1	90	None	smolt
2025-03-24	Chinook	1	91	AdClipped	smolt
2025-03-24	Chinook	1	95	AdClipped	smolt
2025-03-24	Chinook	1	101	AdClipped	smolt
2025-03-24	Chinook	1	101	AdClipped	smolt
2025-03-26	Chinook	1	59	AdClipped	parr
2025-03-26	Chinook	2	85	AdClipped	silvery parr
2025-03-26	Chinook	1	86	AdClipped	silvery parr
2025-03-26	Chinook	1	86	AdClipped	silvery parr
2025-03-26	Chinook	1	86	AdClipped	silvery parr
2025-03-26	Chinook	1	88	AdClipped	silvery parr
2025-03-26	Chinook	1	91	AdClipped	silvery parr
2025-03-26	Chinook	1	96	AdClipped	silvery parr
2025-03-26	Chinook	1	97	AdClipped	silvery parr
2025-03-26	Chinook	1	98	AdClipped	silvery parr
2025-03-26	Chinook	1	89	AdClipped	smolt
2025-03-26	Chinook	1	90	AdClipped	smolt
2025-03-28	Chinook	2	84	None	smolt
2025-03-28	Chinook	1	86	None	smolt
2025-03-28	Chinook	1	91	None	smolt
2025-03-28	Chinook	1	100	None	smolt
2025-04-01	Chinook	1	62	PkUC	silvery parr
2025-04-01	Chinook	1	81	AdClipped	smolt
2025-04-01	Chinook	1	85	AdClipped	smolt
2025-04-01	Chinook	1	89	AdClipped	smolt
2025-04-03	Chinook	1	83	None	smolt
2025-04-03	Chinook	2	86	None	smolt
2025-04-03	Chinook	1	87	None	smolt
2025-04-03	Chinook	1	88	None	smolt
2025-04-03	Chinook	1	88	None	smolt
2025-04-03	Chinook	1	89	None	smolt
2025-04-03	Chinook	1	92	None	smolt
2025-04-03	Chinook	1	92	None	smolt
2025-04-03	Chinook	1	93	None	smolt
2025-04-03	Chinook	1	97	None	smolt
2025-04-03	Chinook	1	99	None	smolt
2025-04-03	Chinook	1	100	None	smolt

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:

Juvenile Monitoring & Sampling data queries
River Conditions data queries