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:

Sep 17 2021 at 7:52 AM PDT

Next Issuance:

Sep 18 2021 at 9:00 AM PDT

Monitor Stage: 48.0 Feet

Flood Stage: 54.7 Feet

Danger Stage: 55.7 Feet

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
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
2016	2,512	37.33	Mar 14, 2016
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: Sunny. Highs 83 to 91. Northwest winds up to 10 mph shifting to the west around 10 mph in the afternoon.

Tonight: Clear. Lows 50 to 58. Northwest winds around 10 mph.

Saturday: Sunny. Highs 76 to 82. Northwest winds around 10 mph.

Saturday Night: Mostly clear. A slight chance of rain showers after midnight. Lows 55 to 61. Northwest winds 10 to 15 mph.

Sunday: Mostly cloudy with a slight chance of rain showers in the morning, then mostly sunny in the afternoon. Highs 74 to 80. Northwest winds up to 15 mph.

Sunday Night: Mostly clear. Lows 51 to 61.

Monday: Sunny, warmer. Highs 81 to 89.

Monday Night and Tuesday: Clear. Lows 54 to 64. Highs 83 to 93.

Tuesday Night through Wednesday Night: Mostly clear. Lows 56 to 66. Highs 87 to 95.

Thursday: Sunny. Highs 84 to 90.

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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