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: Mar 23 2017 at 2:36 PM PDTNext Issuance: Mar 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 cloudy. A slight chance of rain after midnight. Lows 46 to 52. Northwest winds up to 10 mph shifting to the southeast after midnight.

Friday: A chance of rain in the morning, then rain in the afternoon. Highs 54 to 60. Southeast winds 10 to 15 mph. Gusts up to 25 mph increasing to 35 mph in the afternoon.

Friday Night: Cloudy. Rain in the evening, then a chance of rain showers after midnight. Lows 45 to 51. Southeast winds 10 to 15 mph. Gusts up to 30 mph in the evening.

Saturday: Mostly cloudy with a slight chance of rain showers. Warmer. Highs 58 to 68. Northwest winds up to 10 mph.

Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows 43 to 49. Northwest winds up to 10 mph.

Sunday: Mostly cloudy with a chance of rain. Highs 54 to 62.

Sunday Night: Rain likely. Lows 46 to 52.

Monday: Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms. Highs 56 to 66.

Monday Night: Partly cloudy with a slight chance of rain showers. Lows 43 to 49.

Tuesday through Wednesday Night: Mostly clear. Highs 64 to 74. Lows 42 to 52.

Thursday: Partly cloudy with a slight chance of rain showers. Highs 61 to 71.
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.