National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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SAN JOAQUIN RIVER - PATTERSON (PATC1)
Latitude: 37.49º NLongitude: 121.08º WElevation: 97 Feet
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Jun 13 2024 at 8:04 AM PDTNext Issuance: Jun 14 2024 at 9:00 AM PDT
Monitor Stage: 48.0 FeetFlood Stage: 54.7 FeetDanger Stage: 55.7 Feet

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

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
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
ESRI™ Locator Map
Impacts - E19 Information
58.3 FeetStages above 58.3 feet result in flooding outside the levee. Top of levee.
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Clear. Lows 54 to 62. Northwest winds up to 10 mph with gusts to around 20 mph.

Friday: Sunny. Highs 89 to 95. Northwest winds up to 10 mph. Gusts up to 25 mph in the afternoon.

Friday Night: Clear. Lows 52 to 60. West winds up to 15 mph with gusts to around 25 mph.

Saturday: Sunny. Highs 84 to 91. Northwest winds up to 15 mph with gusts to around 25 mph.

Saturday Night: Clear. Lows 54 to 62. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Sunday: Sunny. Highs 83 to 90.

Sunday Night: Clear. Lows 53 to 61.

Monday through Tuesday Night: Clear. Highs 79 to 89. Lows 52 to 61.

Juneteenth through Thursday: Clear. Highs 88 to 98. Lows 54 to 64.
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.