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: May 25 2019 at 8:47 AM PDTNext Issuance: May 26 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
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
2013
1,809
34.32
Dec 29, 2012
 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: Mostly sunny. Highs 69 to 77. Northwest winds up to 10 mph.

Tonight: Mostly clear in the evening, then mostly cloudy with a chance of rain showers after midnight. Lows 48 to 55. West winds 10 to 15 mph shifting to the southwest with gusts to around 30 mph after midnight.

Sunday: Mostly cloudy. A chance of rain showers in the morning, then a chance of rain showers and a slight chance of thunderstorms in the afternoon. Highs 56 to 64. Southwest winds 10 to 15 mph. Gusts up to 30 mph decreasing to 20 mph in the afternoon.

Sunday Night: Mostly cloudy. A slight chance of rain showers in the evening. Lows 45 to 51. Southwest winds up to 10 mph in the evening becoming light.

Memorial Day: Mostly cloudy in the morning then becoming partly cloudy. Warmer. Highs 64 to 72. Light winds becoming west up to 10 mph in the afternoon.

Monday Night: Partly cloudy. Lows 48 to 54.

Tuesday: Mostly sunny. Warmer. Highs 73 to 80.

Tuesday Night: Mostly clear. Lows 52 to 58.

Wednesday: Partly cloudy. Highs 76 to 83.

Wednesday Night through Friday: Mostly clear. Lows 53 to 60. Highs 77 to 87.
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.