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 20 2023 at 2:58 PM PDT

Next Issuance:

Mar 21 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: Rain showers until late afternoon, then rain showers and a slight chance of thunderstorms late in the afternoon. Windy. Highs 50 to 59. Southeast winds 10 to 15 mph with gusts to around 35 mph increasing to 15 to 30 mph with gusts to around 45 mph in the afternoon.

Tonight: Rain showers likely and a slight chance of thunderstorms in the evening, then rain showers likely after midnight. Breezy. Lows 42 to 47. Southeast winds 10 to 25 mph. Gusts up to 40 mph in the evening.

Wednesday: Mostly cloudy with a chance of rain showers. Highs 51 to 59. Southeast winds 10 to 20 mph. Gusts up to 35 mph decreasing to 25 mph in the afternoon.

Wednesday Night: Mostly cloudy. A chance of rain showers in the evening. Lows 41 to 47. Southwest winds up to 10 mph.

Thursday: Mostly cloudy. A slight chance of rain showers in the afternoon. Highs 53 to 61. West winds up to 15 mph. Gusts up to 25 mph in the afternoon.

Thursday Night: Partly cloudy with a slight chance of rain showers. Lows 36 to 42.

Friday: Mostly sunny. Highs 52 to 60.

Friday Night and Saturday: Mostly clear. Lows 34 to 40. Highs 51 to 60.

Saturday Night and Sunday: Clear. Lows 32 to 38. Highs 51 to 60.

Sunday Night: Partly cloudy. Lows 35 to 41.

Monday: Mostly cloudy with a chance of rain showers. Highs 51 to 59.

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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