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 FeetForecast Type: Official Location
Location: San Joaquin County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: May 22 2026 at 8:14 AM PDTNext Issuance: May 23 2026 at 9:00 AM PDT
Action/Monitor: 19.5 FeetMinor Flood: 28.5 FeetModerate Flood: 32.1 FeetMajor Flood: 33.1 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Mossdale (MOSC1)
#
# File Generation Time:  05/22/2026 at 08:14 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/18/2026 at 09:00 AM PDT
# Maximum Observed Stage:                       6.76 Feet
#
# Earliest Date & Time of Maximum Forecast:     05/22/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       5.49 Feet
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Trend     Observed Status
# ------------------------------------------------------------------
  05/17/2026 08 AM PDT            6.75                        Normal
  05/17/2026 09 AM PDT            6.66         -              Normal
  05/17/2026 10 AM PDT            6.48         -              Normal
  05/17/2026 11 AM PDT            6.24         -              Normal
  05/17/2026 12 PM PDT            5.99         -              Normal
  05/17/2026 01 PM PDT            5.77         -              Normal
  05/17/2026 02 PM PDT            5.53         -              Normal
  05/17/2026 03 PM PDT            5.30         -              Normal
  05/17/2026 04 PM PDT            5.06         -              Normal
  05/17/2026 05 PM PDT            4.89         -              Normal
  05/17/2026 06 PM PDT            4.86         -              Normal
  05/17/2026 07 PM PDT            5.14         +              Normal
  05/17/2026 08 PM PDT            5.37         +              Normal
  05/17/2026 09 PM PDT            5.61         +              Normal
  05/17/2026 10 PM PDT            5.75         +              Normal
  05/17/2026 11 PM PDT            5.71         -              Normal
  05/18/2026 12 AM PDT            5.58         -              Normal
  05/18/2026 01 AM PDT            5.40         -              Normal
  05/18/2026 02 AM PDT            5.23         -              Normal
  05/18/2026 03 AM PDT            5.07         -              Normal
  05/18/2026 04 AM PDT            5.24         +              Normal
  05/18/2026 05 AM PDT            5.60         +              Normal
  05/18/2026 06 AM PDT            5.94         +              Normal
  05/18/2026 07 AM PDT            6.29         +              Normal
  05/18/2026 08 AM PDT            6.62         +              Normal
  05/18/2026 09 AM PDT            6.76         +              Normal
  05/18/2026 10 AM PDT            6.61         -              Normal
  05/18/2026 11 AM PDT            6.36         -              Normal
  05/18/2026 12 PM PDT            6.16         -              Normal
  05/18/2026 01 PM PDT            5.92         -              Normal
  05/18/2026 02 PM PDT            5.63         -              Normal
  05/18/2026 03 PM PDT            5.38         -              Normal
  05/18/2026 04 PM PDT            5.11         -              Normal
  05/18/2026 05 PM PDT            4.86         -              Normal
  05/18/2026 06 PM PDT            4.62         -              Normal
  05/18/2026 07 PM PDT            4.55         -              Normal
  05/18/2026 08 PM PDT            4.75         +              Normal
  05/18/2026 09 PM PDT            4.93         +              Normal
  05/18/2026 10 PM PDT            5.15         +              Normal
  05/18/2026 11 PM PDT            5.35         +              Normal
  05/19/2026 12 AM PDT            5.38         +              Normal
  05/19/2026 01 AM PDT            5.28         -              Normal
  05/19/2026 02 AM PDT            5.14         -              Normal
  05/19/2026 03 AM PDT            4.97         -              Normal
  05/19/2026 04 AM PDT            4.92         -              Normal
  05/19/2026 05 AM PDT            5.26         +              Normal
  05/19/2026 06 AM PDT            5.59         +              Normal
  05/19/2026 07 AM PDT            5.92         +              Normal
  05/19/2026 08 AM PDT            6.27         +              Normal
  05/19/2026 09 AM PDT            6.58         +              Normal
  05/19/2026 10 AM PDT            6.62         +              Normal
  05/19/2026 11 AM PDT            6.44         -              Normal
  05/19/2026 12 PM PDT            6.20         -              Normal
  05/19/2026 01 PM PDT            5.91         -              Normal
  05/19/2026 02 PM PDT            5.64         -              Normal
  05/19/2026 03 PM PDT            5.37         -              Normal
  05/19/2026 04 PM PDT            5.11         -              Normal
  05/19/2026 05 PM PDT            4.84         -              Normal
  05/19/2026 06 PM PDT            4.60         -              Normal
  05/19/2026 07 PM PDT            4.38         -              Normal
  05/19/2026 08 PM PDT            4.45         +              Normal
  05/19/2026 09 PM PDT            4.71         +              Normal
  05/19/2026 10 PM PDT            4.96         +              Normal
  05/19/2026 11 PM PDT            5.22         +              Normal
  05/20/2026 12 AM PDT            5.43         +              Normal
  05/20/2026 01 AM PDT            5.46         +              Normal
  05/20/2026 02 AM PDT            5.36         -              Normal
  05/20/2026 03 AM PDT            5.21         -              Normal
  05/20/2026 04 AM PDT            5.05         -              Normal
  05/20/2026 05 AM PDT            5.19         +              Normal
  05/20/2026 06 AM PDT            5.32         +              Normal
  05/20/2026 07 AM PDT            5.65         +              Normal
  05/20/2026 08 AM PDT            5.97         +              Normal
  05/20/2026 09 AM PDT            6.33         +              Normal
  05/20/2026 10 AM PDT            6.61         +              Normal
  05/20/2026 11 AM PDT            6.61         0              Normal
  05/20/2026 12 PM PDT            6.42         -              Normal
  05/20/2026 01 PM PDT            6.18         -              Normal
  05/20/2026 02 PM PDT            5.90         -              Normal
  05/20/2026 03 PM PDT            5.63         -              Normal
  05/20/2026 04 PM PDT            5.36         -              Normal
  05/20/2026 05 PM PDT            5.10         -              Normal
  05/20/2026 06 PM PDT            4.82         -              Normal
  05/20/2026 07 PM PDT            4.58         -              Normal
  05/20/2026 08 PM PDT            4.40         -              Normal
  05/20/2026 09 PM PDT            4.58         +              Normal
  05/20/2026 10 PM PDT            4.82         +              Normal
  05/20/2026 11 PM PDT            5.07         +              Normal
  05/21/2026 12 AM PDT            5.34         +              Normal
  05/21/2026 01 AM PDT            5.57         +              Normal
  05/21/2026 02 AM PDT            5.63         +              Normal
  05/21/2026 03 AM PDT            5.52         -              Normal
  05/21/2026 04 AM PDT            5.37         -              Normal
  05/21/2026 05 AM PDT            5.21         -              Normal
  05/21/2026 06 AM PDT            5.12         -              Normal
  05/21/2026 07 AM PDT            5.39         +              Normal
  05/21/2026 08 AM PDT            5.75         +              Normal
  05/21/2026 09 AM PDT            6.09         +              Normal
  05/21/2026 10 AM PDT            6.44         +              Normal
  05/21/2026 11 AM PDT            6.73         +              Normal
  05/21/2026 12 PM PDT            6.71         -              Normal
  05/21/2026 01 PM PDT            6.52         -              Normal
  05/21/2026 02 PM PDT            6.28         -              Normal
  05/21/2026 03 PM PDT            6.01         -              Normal
  05/21/2026 04 PM PDT            5.75         -              Normal
  05/21/2026 05 PM PDT            5.48         -              Normal
  05/21/2026 06 PM PDT            5.21         -              Normal
  05/21/2026 07 PM PDT            4.94         -              Normal
  05/21/2026 08 PM PDT            4.69         -              Normal
  05/21/2026 09 PM PDT            4.53         -              Normal
  05/21/2026 10 PM PDT            4.77         +              Normal
  05/21/2026 11 PM PDT            5.01         +              Normal
  05/22/2026 12 AM PDT            5.28         +              Normal
  05/22/2026 01 AM PDT            5.57         +              Normal
  05/22/2026 02 AM PDT            5.80         +              Normal
  05/22/2026 03 AM PDT            5.83         +              Normal
  05/22/2026 04 AM PDT            5.69         -              Normal
  05/22/2026 05 AM PDT            5.50         -              Normal
  05/22/2026 06 AM PDT            5.49         -              Normal
  05/22/2026 07 AM PDT            5.49         0              Normal
  05/22/2026 08 AM PDT            5.49         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Trend     Forecast Status
# ------------------------------------------------------------------
  05/22/2026 09 AM PDT            5.49                        Normal
  05/22/2026 10 AM PDT            5.49         0              Normal
  05/22/2026 11 AM PDT            5.49         0              Normal
  05/22/2026 12 PM PDT            5.49         0              Normal
  05/22/2026 01 PM PDT            5.49         0              Normal
  05/22/2026 02 PM PDT            5.49         0              Normal
  05/22/2026 03 PM PDT            5.48         -              Normal
  05/22/2026 04 PM PDT            5.48         0              Normal
  05/22/2026 05 PM PDT            5.48         0              Normal
  05/22/2026 06 PM PDT            5.48         0              Normal
  05/22/2026 07 PM PDT            5.48         0              Normal
  05/22/2026 08 PM PDT            5.48         0              Normal
  05/22/2026 09 PM PDT            5.48         0              Normal
  05/22/2026 10 PM PDT            5.48         0              Normal
  05/22/2026 11 PM PDT            5.48         0              Normal
  05/23/2026 12 AM PDT            5.48         0              Normal
  05/23/2026 01 AM PDT            5.48         0              Normal
  05/23/2026 02 AM PDT            5.48         0              Normal
  05/23/2026 03 AM PDT            5.48         0              Normal
  05/23/2026 04 AM PDT            5.48         0              Normal
  05/23/2026 05 AM PDT            5.48         0              Normal
  05/23/2026 06 AM PDT            5.48         0              Normal
  05/23/2026 07 AM PDT            5.48         0              Normal
  05/23/2026 08 AM PDT            5.48         0              Normal
  05/23/2026 09 AM PDT            5.48         0              Normal
  05/23/2026 10 AM PDT            5.48         0              Normal
  05/23/2026 11 AM PDT            5.48         0              Normal
  05/23/2026 12 PM PDT            5.48         0              Normal
  05/23/2026 01 PM PDT            5.48         0              Normal
  05/23/2026 02 PM PDT            5.48         0              Normal
  05/23/2026 03 PM PDT            5.48         0              Normal
  05/23/2026 04 PM PDT            5.48         0              Normal
  05/23/2026 05 PM PDT            5.48         0              Normal
  05/23/2026 06 PM PDT            5.48         0              Normal
  05/23/2026 07 PM PDT            5.48         0              Normal
  05/23/2026 08 PM PDT            5.48         0              Normal
  05/23/2026 09 PM PDT            5.48         0              Normal
  05/23/2026 10 PM PDT            5.48         0              Normal
  05/23/2026 11 PM PDT            5.48         0              Normal
  05/24/2026 12 AM PDT            5.48         0              Normal
  05/24/2026 01 AM PDT            5.48         0              Normal
  05/24/2026 02 AM PDT            5.48         0              Normal
  05/24/2026 03 AM PDT            5.48         0              Normal
  05/24/2026 04 AM PDT            5.48         0              Normal
  05/24/2026 05 AM PDT            5.48         0              Normal
  05/24/2026 06 AM PDT            5.48         0              Normal
  05/24/2026 07 AM PDT            5.48         0              Normal
  05/24/2026 08 AM PDT            5.48         0              Normal
  05/24/2026 09 AM PDT            5.48         0              Normal
  05/24/2026 10 AM PDT            5.48         0              Normal
  05/24/2026 11 AM PDT            5.48         0              Normal
  05/24/2026 12 PM PDT            5.48         0              Normal
  05/24/2026 01 PM PDT            5.48         0              Normal
  05/24/2026 02 PM PDT            5.48         0              Normal
  05/24/2026 03 PM PDT            5.48         0              Normal
  05/24/2026 04 PM PDT            5.48         0              Normal
  05/24/2026 05 PM PDT            5.48         0              Normal
  05/24/2026 06 PM PDT            5.48         0              Normal
  05/24/2026 07 PM PDT            5.48         0              Normal
  05/24/2026 08 PM PDT            5.48         0              Normal
  05/24/2026 09 PM PDT            5.48         0              Normal
  05/24/2026 10 PM PDT            5.48         0              Normal
  05/24/2026 11 PM PDT            5.48         0              Normal
  05/25/2026 12 AM PDT            5.48         0              Normal
  05/25/2026 01 AM PDT            5.47         -              Normal
  05/25/2026 02 AM PDT            5.47         0              Normal
  05/25/2026 03 AM PDT            5.47         0              Normal
  05/25/2026 04 AM PDT            5.47         0              Normal
  05/25/2026 05 AM PDT            5.47         0              Normal
  05/25/2026 06 AM PDT            5.47         0              Normal
  05/25/2026 07 AM PDT            5.47         0              Normal
  05/25/2026 08 AM PDT            5.47         0              Normal
  05/25/2026 09 AM PDT            5.47         0              Normal
  05/25/2026 10 AM PDT            5.47         0              Normal
  05/25/2026 11 AM PDT            5.47         0              Normal
  05/25/2026 12 PM PDT            5.47         0              Normal
  05/25/2026 01 PM PDT            5.47         0              Normal
  05/25/2026 02 PM PDT            5.47         0              Normal
  05/25/2026 03 PM PDT            5.47         0              Normal
  05/25/2026 04 PM PDT            5.47         0              Normal
  05/25/2026 05 PM PDT            5.47         0              Normal
  05/25/2026 06 PM PDT            5.47         0              Normal
  05/25/2026 07 PM PDT            5.47         0              Normal
  05/25/2026 08 PM PDT            5.47         0              Normal
  05/25/2026 09 PM PDT            5.47         0              Normal
  05/25/2026 10 PM PDT            5.47         0              Normal
  05/25/2026 11 PM PDT            5.47         0              Normal
  05/26/2026 12 AM PDT            5.47         0              Normal
  05/26/2026 01 AM PDT            5.47         0              Normal
  05/26/2026 02 AM PDT            5.47         0              Normal
  05/26/2026 03 AM PDT            5.47         0              Normal
  05/26/2026 04 AM PDT            5.47         0              Normal
  05/26/2026 05 AM PDT            5.47         0              Normal
  05/26/2026 06 AM PDT            5.47         0              Normal
  05/26/2026 07 AM PDT            5.47         0              Normal
  05/26/2026 08 AM PDT            5.47         0              Normal
  05/26/2026 09 AM PDT            5.47         0              Normal
  05/26/2026 10 AM PDT            5.47         0              Normal
  05/26/2026 11 AM PDT            5.47         0              Normal
  05/26/2026 12 PM PDT            5.47         0              Normal
  05/26/2026 01 PM PDT            5.47         0              Normal
  05/26/2026 02 PM PDT            5.47         0              Normal
  05/26/2026 03 PM PDT            5.47         0              Normal
  05/26/2026 04 PM PDT            5.47         0              Normal
  05/26/2026 05 PM PDT            5.47         0              Normal
  05/26/2026 06 PM PDT            5.47         0              Normal
  05/26/2026 07 PM PDT            5.47         0              Normal
  05/26/2026 08 PM PDT            5.47         0              Normal
  05/26/2026 09 PM PDT            5.47         0              Normal
  05/26/2026 10 PM PDT            5.47         0              Normal
  05/26/2026 11 PM PDT            5.47         0              Normal
  05/27/2026 12 AM PDT            5.47         0              Normal
  05/27/2026 01 AM PDT            5.47         0              Normal
  05/27/2026 02 AM PDT            5.47         0              Normal
  05/27/2026 03 AM PDT            5.46         -              Normal
  05/27/2026 04 AM PDT            5.46         0              Normal
  05/27/2026 05 AM PDT            5.46         0              Normal
#
# NOTE 1: Stages are rounded to the nearest hundredth (.01) of a foot.
# NOTE 2: Trends are determined using hourly change in unrounded stage.
# NOTE 3: Maximum Values are determined using unrounded stage.