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: Apr 23 2017 at 8:13 AM PDTNext Issuance: Apr 24 2017 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
2014
1,357
32.80
Oct 28, 2013
2013
1,809
34.32
Dec 29, 2012
2012
1,984
35.10
Oct 13, 2011
2011
23,269
49.63
Mar 31, 2011
2010
--
--
--
 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
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)
Tonight: Mostly clear. Lows 46 to 52. West winds 10 to 15 mph.

Monday: Mostly cloudy with a slight chance of rain. Highs 61 to 70. West winds up to 15 mph.

Monday Night: Mostly cloudy with a slight chance of rain showers. Lows 48 to 54. West winds around 10 mph.

Tuesday: Mostly cloudy. Highs 63 to 72. Northwest winds up to 15 mph.

Tuesday Night: Mostly cloudy. Lows 50 to 56. Northwest winds 10 to 15 mph.

Wednesday: Mostly cloudy with a slight chance of rain showers. Highs 67 to 75.

Wednesday Night: Mostly clear. Lows 49 to 55.

Thursday: Partly cloudy. Highs 67 to 75.

Thursday Night and Friday: Mostly clear. Breezy. Lows 48 to 54. Highs 67 to 75.

Friday Night: Clear, breezy. Lows 48 to 54.

Saturday: Mostly sunny. Highs 71 to 80.

Saturday Night: Clear. Lows 49 to 55.

Sunday: Mostly sunny. Highs 76 to 84.
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.