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 CaliforniaRiver 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
Official 7 Day National Weather Service Forecast   (CAZ019)
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Patchy fog and frost late in the night. Lows 32 to 42. Northwest winds up to 10 mph.

Monday: Areas of frost and patchy fog in the morning. Mostly sunny. Highs 56 to 62. Northwest winds up to 10 mph.

Monday Night: Mostly clear. Patchy fog after midnight. Lows 34 to 44. Light winds.

Tuesday: Patchy fog and frost in the morning. Mostly sunny. Highs 55 to 61. Northwest winds up to 10 mph.

Tuesday Night: Clear. Patchy fog after midnight. Lows 32 to 42. Northwest winds up to 10 mph in the evening becoming light.

Wednesday: Mostly sunny. Patchy frost. Highs 57 to 63.

Wednesday Night: Partly cloudy. Lows 35 to 45.

Thursday and Thursday Night: Mostly cloudy. Highs 58 to 64. Lows 35 to 45.

Friday: Partly cloudy. Highs 59 to 65.

Friday Night: Mostly cloudy. Lows 35 to 45.

Saturday: Mostly sunny. Highs 60 to 66.

Saturday Night: Partly cloudy with a slight chance of rain showers. Lows 37 to 47.

Sunday: Partly cloudy with a slight chance of rain showers. Highs 58 to 64.
Impacts - E19 Information
33.1 FeetStages above 30.7 feet result in flooding outside the levees. 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.