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
Monitor Stage: 19.5 FeetFlood Stage: 28.5 FeetDanger Stage: 29.5 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.

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)
Today: Sunny in the morning then becoming partly cloudy. Highs 74 to 82. Northwest winds up to 10 mph.

Tonight: Mostly clear in the evening then becoming mostly cloudy. Lows 52 to 58. Northwest winds up to 10 mph.

Friday: Partly cloudy in the morning then clearing. Highs 74 to 82. Northwest winds up to 10 mph.

Friday Night: Mostly clear. Lows 49 to 55. Northwest winds up to 15 mph.

Saturday: Sunny. Highs 73 to 81. Northwest winds up to 15 mph.

Saturday Night: Clear. Lows 48 to 54.

Sunday: Sunny. Highs 74 to 82.

Sunday Night and Monday: Mostly clear. Lows 50 to 56. Highs 74 to 82.

Monday Night: Clear. Lows 47 to 53.

Tuesday: Mostly sunny. Highs 65 to 74.

Tuesday Night: Partly cloudy. Lows 45 to 51.

Wednesday: Mostly cloudy. Highs 62 to 71.
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.