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 15 2019 at 3:10 PM PSTNext Issuance: Feb 16 2019 at 9:00 AM 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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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)
Tonight: Partly cloudy with a chance of rain showers in the evening, then rain showers after midnight. Lows 38 to 44. West winds around 10 mph shifting to the south after midnight. Gusts up to 25 mph.

Saturday: Rain showers in the morning, then rain showers and a slight chance of thunderstorms in the afternoon. Highs 47 to 54. South winds 10 to 15 mph with gusts to around 25 mph.

Saturday Night: Mostly cloudy with a chance of rain showers. Lows around 38. West winds 10 to 15 mph with gusts to around 25 mph shifting to the south after midnight.

Sunday: Mostly cloudy with a chance of rain showers. Highs 45 to 53. South winds up to 10 mph shifting to the northwest around 10 mph in the afternoon.

Sunday Night: Mostly clear. A slight chance of rain showers in the evening. Lows 30 to 36. Northwest winds 10 to 15 mph.

Washingtons Birthday: Sunny. Highs 48 to 56.

Monday Night: Clear. Lows 29 to 35.

Tuesday and Tuesday Night: Mostly clear. Highs 48 to 56. Lows 29 to 36.

Wednesday: Partly cloudy with a slight chance of rain showers. Highs 49 to 56.

Wednesday Night: Mostly cloudy with a chance of rain showers. Lows 34 to 40.

Thursday: Partly cloudy with a slight chance of rain showers. Highs 47 to 55.

Thursday Night: Partly cloudy with a slight chance of rain showers. Lows 32 to 38.

Friday: Mostly sunny. Highs 50 to 56.
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.