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 20 2019 at 2:19 PM PSTNext Issuance: Feb 21 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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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)
Tonight: Mostly cloudy. A chance of rain showers in the evening, then a slight chance of rain showers after midnight. Lows 29 to 39. Northwest winds up to 10 mph.

Thursday: Partly cloudy in the morning then clearing. Highs 49 to 56. Northwest winds up to 20 mph. Gusts up to 30 mph in the afternoon.

Thursday Night: Clear. Lows 29 to 35. Northwest winds 10 to 20 mph.

Friday: Areas of frost in the morning. Sunny. Highs 50 to 57. West winds up to 10 mph.

Friday Night: Mostly clear. Lows 32 to 38. Light winds.

Saturday: Mostly sunny. Highs 52 to 59.

Saturday Night: Mostly cloudy with a slight chance of rain. Lows 38 to 44.

Sunday: Mostly cloudy with a slight chance of rain showers. Highs 52 to 59.

Sunday Night through Tuesday: Mostly cloudy with a chance of rain. Lows 39 to 46. Highs 52 to 61.

Tuesday Night and Wednesday: Mostly cloudy with a slight chance of rain. Lows around 45. Highs 56 to 65.
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.