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*** IMPORTANT ***  Week of June 16 - Website Data Outage [View details]

SAN JOAQUIN RIVER - MOSSDALE (MOSC1)
Latitude:
37.79º N
Longitude:
121.31º W
Elevation:
32 Feet
Location: San Joaquin County in CA
River Group: San Joaquin
Forecast Issued: Jun 05 2025 at 8:39 AM PDT
Next Issuance: Jun 06 2025 at 9:00 AM PDT

Action/
Monitor:
19.5 Ft
Minor
Flood:
28.5 Ft
Moderate
Flood:
32.1 Ft
Major
Flood:
33.1 Ft

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Showing Forecast.  Click image for obs.
Graphical River Forecast - SAN JOAQUIN RIVER - MOSSDALE (MOSC1)Graphical River Forecast - SAN JOAQUIN RIVER - MOSSDALE (MOSC1)

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2024
--
11.32
Mar 6, 2024
2023
--
20.52
Mar 24, 2023
2022
-- 7.51 Oct 24, 2021
2021
--
6.74
Jun 27, 2021
2020
--
7.93
Dec 13, 2019
 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

Flood Impacts
33.1 FeetStages above 33.1 feet result in flooding outside of the levees. Top of levee.
16.39 FeetHistorically Mossdale Trailer Park evacuates.
15.4 FeetMossdale Trailer Park is threatened by the high water. Mossdale Trailer Park is on the south side of the river inside the levee both upstream and downstream of the gage.