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 - MOSSDALE (MOSC1)
Latitude: 37.79º NLongitude: 121.31º WElevation: 32 Feet
Location: San Joaquin County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Mar 04 2024 at 8:39 AM PSTNext Issuance: Mar 04 2024 at 3:00 PM PST
Monitor Stage: 19.5 FeetFlood Stage: 28.5 FeetDanger Stage: 29.5 Feet

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
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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Year:  
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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
2022
-- 7.51 Oct 24, 2021
2021
--
6.74
Jun 27, 2021
2020
--
7.93
Dec 13, 2019
2019
--
14.31
Jun 6, 2019
2018
--
10.43
Apr 8, 2018
 Historical High Stage/Flow Events (Period of Record - Jan 1920 to Present)* - Ranked by Stage
1951
--
24.40**
Dec 10, 1950
1997
--
23.24**
Jan 9, 1997
2017
-- 21.70 Feb 23, 2017
1969
--
20.31**

Jan 27, 1969

1967 -- 18.10** Jan 24, 1967
2006 -- 17.19** Apr 13, 2006
 * No data was available Sep 2006 to Apr 2007
 ** Datum changed from NGVD29 to NAVD88 on 10/01/2006. The difference is +2.38 ft and must be applied to all data before date to convert to NAVD88
Location Photographs
ESRI™ Locator Map
Impacts - E19 Information
33.1 FeetStages above 30.7 feet result in flooding outside the levees. Top of levee.
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Mostly cloudy. Lows 40 to 46. Light winds becoming southeast up to 10 mph after midnight.

Tuesday: Partly cloudy in the morning then becoming mostly cloudy. Highs 56 to 65. Southeast winds up to 10 mph.

Tuesday Night: Mostly cloudy. A slight chance of rain showers after midnight. Lows 42 to 48. South winds around 10 mph shifting to the east up to 10 mph after midnight.

Wednesday: Mostly cloudy with a slight chance of rain showers. Highs 57 to 66. East winds up to 10 mph.

Wednesday Night: Partly cloudy. Lows 41 to 47. Northwest winds up to 10 mph.

Thursday: Mostly cloudy. Highs 56 to 64.

Thursday Night: Clear. Lows 38 to 44.

Friday and Friday Night: Clear. Highs 59 to 67. Lows 38 to 45.

Saturday through Sunday: Partly cloudy. Highs 58 to 66. Lows 39 to 46.

Sunday Night and Monday: Mostly cloudy with a slight chance of rain showers. Lows 42 to 48. Highs 58 to 66.
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.