CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SAN JOAQUIN RIVER - PATTERSON (PATC1)

Latitude: 37.49º N	Longitude: 121.08º W	Elevation: 97 Feet
Location: Stanislaus County in California		Bulletin Group: San Joaquin		River Group: San Joaquin

Issuance Time:

Jan 18 2025 at 7:43 AM PST

Next Issuance:

Jan 19 2025 at 9:00 AM PST

Action/Monitor: 48.0 Feet

Minor Flood: 54.7 Feet

Moderate Flood: 57.3 Feet

Major Flood: 58.3 Feet

Plot Type:

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

Observed Data Credit
	Raw streamflow data is provided by the California Department of Water Resources. View California Department of Water Resources Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2023	24,500	52.24	Mar 27, 2023
2022	1,190	33.41	Dec 31, 2021
2021	1,770	34.50	Feb 1, 2021
2020	3,120	37.40	Oct 2, 2019
2019	11,800	45.31	Jun 5, 2019
Historical High Stage/Flow Events (Period of Record - Oct 1969 to Present) - Ranked by Flow
1983*	28,700	51.26	Mar 4, 1983
2006*	27,612	50.97	Apr 10, 2006
2017	25,600	51.71	Feb 22, 2017
1980*	24,900	50.57	Feb 25, 1980
2023	24,500	52.24	Mar 27, 2023
1938*	--	50.50	Jun 13, 1938
1986*	23,000	49.65	Mar 18, 1986

* Discharge affected by regulation or diversion
** Most recent continuous record back to Oct 1969 with segmented periods back to Apr 1938

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
58.3 Feet	Stages above 58.3 feet result in flooding outside the levee. Top of levee.

Official 7 Day National Weather Service Forecast (CAZ019)

Today: Areas of frost and patchy dense fog in the morning. Sunny. Highs around 57. North winds up to 10 mph.

Tonight: Mostly clear. Patchy fog after midnight. Lows 32 to 40. Northwest winds up to 10 mph.

Martin Luther King Jr Day: Areas of frost and patchy fog in the morning. Mostly sunny. Highs 54 to 62. Northwest winds up to 10 mph.

Monday Night: Clear. Areas of frost after midnight. Lows 31 to 39. North winds up to 10 mph in the evening becoming light.

Tuesday: Areas of frost in the morning. Mostly sunny. Highs around 58. Light winds.

Tuesday Night: Mostly clear. Lows 31 to 39.

Wednesday: Sunny. Areas of frost. Highs around 58.

Wednesday Night: Clear. Lows 33 to 41.

Thursday: Mostly sunny. Areas of frost. Highs around 62.

Thursday Night through Friday Night: Mostly clear. Lows 34 to 44. Highs around 62.

Saturday: Partly cloudy with a slight chance of rain showers. Highs 52 to 59.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Sacramento Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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Verification - Historical Graphical RVF
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