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: Feb 22 2018 at 8:18 AM PSTNext Issuance: Feb 22 2018 at 3:00 PM PST
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
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
2012
1,984
35.10
Oct 13, 2011
 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)
Today: Mostly sunny. A chance of rain showers and isolated thunderstorms in the afternoon. Highs 47 to 55. South winds up to 10 mph shifting to the west in the afternoon. Gusts up to 25 mph.

Tonight: Mostly cloudy with a chance of rain showers and isolated thunderstorms in the evening, then mostly clear after midnight. Lows 26 to 36. Northwest winds up to 15 mph. Gusts up to 30 mph decreasing to 20 mph after midnight.

Friday: Sunny. Highs 49 to 57. Northwest winds up to 15 mph.

Friday Night: Clear. Lows 27 to 37. Northwest winds 10 to 20 mph in the evening becoming light.

Saturday: Mostly sunny. Highs 52 to 60. Light winds becoming west around 10 mph in the afternoon.

Saturday Night: Mostly clear. Lows 30 to 40.

Sunday: Mostly sunny. Highs 55 to 61.

Sunday Night: Mostly clear. Lows 35 to 43.

Monday and Monday Night: Mostly cloudy with a chance of rain showers. Highs 50 to 60. Lows 34 to 43.

Tuesday: Partly cloudy with a slight chance of rain showers. Highs 50 to 60.

Tuesday Night and Wednesday: Mostly clear. Lows 31 to 39. Highs 53 to 60.
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.