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 CaliforniaRiver Group: San Joaquin
Issuance Time: Jul 19 2019 at 8:11 AM PDTNext Issuance: Jul 20 2019 at 9:00 AM PDT
Monitor Stage: 48.0 FeetFlood Stage: 54.7 FeetDanger Stage: 55.7 Feet
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
2018
4,600
39.68
Apr 12, 2018
2017
25,600
51.71
Feb 22, 2017
2016
2,512
37.33
Mar 14, 2016
2015
1,477
34.52
Dec 16, 2014
2014
1,357
32.80
Oct 28, 2013
 Historical High Stage/Flow Events (Period of Record - Oct 1969 to Present)
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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ019)
Today: Sunny. Highs 87 to 95. Northwest winds up to 10 mph.

Tonight: Clear. Lows 58 to 66. Northwest winds up to 15 mph.

Sunday: Sunny. Highs 89 to 97. Northwest winds up to 10 mph.

Sunday Night: Mostly clear. Lows 60 to 68. Northwest winds around 10 mph.

Monday: Sunny. Highs 92 to 100. West winds up to 10 mph.

Monday Night: Mostly clear. Lows 61 to 69.

Tuesday: Mostly sunny. Highs 92 to 100.

Tuesday Night and Wednesday: Mostly clear. Lows 60 to 70. Highs 92 to 102.

Wednesday Night: Clear. Lows 61 to 71.

Thursday: Mostly sunny. Highs 96 to 104.

Thursday Night: Partly cloudy. Lows 62 to 70.

Friday: Mostly sunny. Highs 95 to 103.
Impacts - E19 Information
58.3 FeetStages 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.