CNRFC - Hydrology - River Guidance - Graphical RVF

SAN JOAQUIN RIVER - PATTERSON (PATC1)

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

Issuance Time:

Mar 22 2023 at 2:20 PM PDT

Next Issuance:

Mar 23 2023 at 9:00 AM PDT

Monitor Stage: 48.0 Feet

Flood Stage: 54.7 Feet

Danger Stage: 55.7 Feet

Plot Type:

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

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2021	1,770	34.50	Feb 1, 2021
2020	3,120	37.40	Oct 2, 2019
2019	11,800	45.31	Jun 5, 2019
2018	4,600	39.68	Apr 12, 2018
2017	25,600	51.71	Feb 22, 2017
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
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

Official 7 Day National Weather Service Forecast (CAZ019)

Today: Mostly cloudy with a chance of rain showers. Breezy. Highs 49 to 58. Southeast winds 10 to 25 mph with gusts to around 35 mph.

Tonight: Mostly cloudy with a slight chance of rain showers. Lows 42 to 47. South winds up to 10 mph with gusts to around 20 mph.

Thursday: Mostly cloudy. A slight chance of rain showers in the morning. Highs 52 to 61. West winds up to 15 mph with gusts to around 25 mph.

Thursday Night: Mostly cloudy. A slight chance of rain showers in the evening. Lows 35 to 41. West winds 10 to 15 mph with gusts to around 30 mph.

Friday: Mostly sunny in the morning then becoming partly cloudy. Highs 51 to 59. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Friday Night: Partly cloudy. Lows 35 to 41.

Saturday: Mostly sunny. Highs 52 to 60.

Saturday Night: Mostly clear. Lows 32 to 38.

Sunday: Mostly sunny. Areas of frost. Highs 52 to 60.

Sunday Night: Partly cloudy. Lows 36 to 41.

Monday: Mostly cloudy with a chance of rain showers. Highs 53 to 60.

Monday Night and Tuesday: Rain showers likely. Lows 40 to 46. Highs 51 to 60.

Impacts - E19 Information
58.3 Feet	Stages above 58.3 feet result in flooding outside the levee. Top of levee.

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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