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 - STEVINSON (SSTC1)
Latitude: 37.29º NLongitude: 120.85º WElevation: 82 FeetForecast Type: Unofficial Location
Location: Merced 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: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A


# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Stevinson (SSTC1)
#
# File Generation Time:  05/22/2026 at 08:16 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/21/2026 at 01:00 PM PDT
# Maximum Observed Stage:                       63.41 Feet
# Maximum Observed Flow:                        189 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/22/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       63.35 Feet
# Maximum Forecast Flow:                        184 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/17/2026 08 AM PDT           63.31            181                Not Applicable
  05/17/2026 09 AM PDT           63.30            180         -      Not Applicable
  05/17/2026 10 AM PDT           63.31            181         +      Not Applicable
  05/17/2026 11 AM PDT           63.30            180         -      Not Applicable
  05/17/2026 12 PM PDT           63.30            180         0      Not Applicable
  05/17/2026 01 PM PDT           63.29            179         -      Not Applicable
  05/17/2026 02 PM PDT           63.29            179         0      Not Applicable
  05/17/2026 03 PM PDT           63.27            177         -      Not Applicable
  05/17/2026 04 PM PDT           63.28            178         +      Not Applicable
  05/17/2026 05 PM PDT           63.29            179         +      Not Applicable
  05/17/2026 06 PM PDT           63.29            179         0      Not Applicable
  05/17/2026 07 PM PDT           63.29            179         0      Not Applicable
  05/17/2026 08 PM PDT           63.28            178         -      Not Applicable
  05/17/2026 09 PM PDT           63.28            178         0      Not Applicable
  05/17/2026 10 PM PDT           63.28            178         0      Not Applicable
  05/17/2026 11 PM PDT           63.28            178         0      Not Applicable
  05/18/2026 12 AM PDT           63.28            178         0      Not Applicable
  05/18/2026 01 AM PDT           63.27            177         -      Not Applicable
  05/18/2026 02 AM PDT           63.27            177         0      Not Applicable
  05/18/2026 03 AM PDT           63.27            177         0      Not Applicable
  05/18/2026 04 AM PDT           63.26            176         -      Not Applicable
  05/18/2026 05 AM PDT           63.25            175         -      Not Applicable
  05/18/2026 06 AM PDT           63.26            176         +      Not Applicable
  05/18/2026 07 AM PDT           63.25            175         -      Not Applicable
  05/18/2026 08 AM PDT           63.25            175         0      Not Applicable
  05/18/2026 09 AM PDT           63.25            175         0      Not Applicable
  05/18/2026 10 AM PDT           63.25            175         0      Not Applicable
  05/18/2026 11 AM PDT           63.26            176         +      Not Applicable
  05/18/2026 12 PM PDT           63.26            176         0      Not Applicable
  05/18/2026 01 PM PDT           63.26            176         0      Not Applicable
  05/18/2026 02 PM PDT           63.27            177         +      Not Applicable
  05/18/2026 03 PM PDT           63.27            177         0      Not Applicable
  05/18/2026 04 PM PDT           63.28            178         +      Not Applicable
  05/18/2026 05 PM PDT           63.29            179         +      Not Applicable
  05/18/2026 06 PM PDT           63.30            180         +      Not Applicable
  05/18/2026 07 PM PDT           63.31            181         +      Not Applicable
  05/18/2026 08 PM PDT           63.31            181         0      Not Applicable
  05/18/2026 09 PM PDT           63.31            181         0      Not Applicable
  05/18/2026 10 PM PDT           63.33            182         +      Not Applicable
  05/18/2026 11 PM PDT           63.34            183         +      Not Applicable
  05/19/2026 12 AM PDT           63.35            184         +      Not Applicable
  05/19/2026 01 AM PDT           63.35            184         0      Not Applicable
  05/19/2026 02 AM PDT           63.35            184         0      Not Applicable
  05/19/2026 03 AM PDT           63.36            185         +      Not Applicable
  05/19/2026 04 AM PDT           63.36            185         0      Not Applicable
  05/19/2026 05 AM PDT           63.36            185         0      Not Applicable
  05/19/2026 06 AM PDT           63.37            186         +      Not Applicable
  05/19/2026 07 AM PDT           63.36            185         -      Not Applicable
  05/19/2026 08 AM PDT           63.36            185         0      Not Applicable
  05/19/2026 09 AM PDT           63.37            186         +      Not Applicable
  05/19/2026 10 AM PDT           63.37            186         0      Not Applicable
  05/19/2026 11 AM PDT           63.37            186         0      Not Applicable
  05/19/2026 12 PM PDT           63.37            186         0      Not Applicable
  05/19/2026 01 PM PDT           63.37            186         0      Not Applicable
  05/19/2026 02 PM PDT           63.37            186         0      Not Applicable
  05/19/2026 03 PM PDT           63.37            186         0      Not Applicable
  05/19/2026 04 PM PDT           63.36            185         -      Not Applicable
  05/19/2026 05 PM PDT           63.36            185         0      Not Applicable
  05/19/2026 06 PM PDT           63.36            185         0      Not Applicable
  05/19/2026 07 PM PDT           63.36            185         0      Not Applicable
  05/19/2026 08 PM PDT           63.35            184         -      Not Applicable
  05/19/2026 09 PM PDT           63.36            185         +      Not Applicable
  05/19/2026 10 PM PDT           63.35            184         -      Not Applicable
  05/19/2026 11 PM PDT           63.36            185         +      Not Applicable
  05/20/2026 12 AM PDT           63.35            184         -      Not Applicable
  05/20/2026 01 AM PDT           63.35            184         0      Not Applicable
  05/20/2026 02 AM PDT           63.35            184         0      Not Applicable
  05/20/2026 03 AM PDT           63.35            184         0      Not Applicable
  05/20/2026 04 AM PDT           63.34            183         -      Not Applicable
  05/20/2026 05 AM PDT           63.35            184         +      Not Applicable
  05/20/2026 06 AM PDT           63.35            184         0      Not Applicable
  05/20/2026 07 AM PDT           63.35            184         0      Not Applicable
  05/20/2026 08 AM PDT           63.35            184         0      Not Applicable
  05/20/2026 09 AM PDT           63.36            185         +      Not Applicable
  05/20/2026 10 AM PDT           63.36            185         0      Not Applicable
  05/20/2026 11 AM PDT           63.36            185         0      Not Applicable
  05/20/2026 12 PM PDT           63.37            186         +      Not Applicable
  05/20/2026 01 PM PDT           63.38            187         +      Not Applicable
  05/20/2026 02 PM PDT           63.38            187         0      Not Applicable
  05/20/2026 03 PM PDT           63.38            187         0      Not Applicable
  05/20/2026 04 PM PDT           63.39            188         +      Not Applicable
  05/20/2026 05 PM PDT           63.39            188         0      Not Applicable
  05/20/2026 06 PM PDT           63.39            188         0      Not Applicable
  05/20/2026 07 PM PDT           63.39            188         0      Not Applicable
  05/20/2026 08 PM PDT           63.39            188         0      Not Applicable
  05/20/2026 09 PM PDT           63.39            188         0      Not Applicable
  05/20/2026 10 PM PDT           63.39            188         0      Not Applicable
  05/20/2026 11 PM PDT           63.39            188         0      Not Applicable
  05/21/2026 12 AM PDT           63.39            188         0      Not Applicable
  05/21/2026 01 AM PDT           63.39            188         0      Not Applicable
  05/21/2026 02 AM PDT           63.39            188         0      Not Applicable
  05/21/2026 03 AM PDT           63.39            188         0      Not Applicable
  05/21/2026 04 AM PDT           63.41            189         +      Not Applicable
  05/21/2026 05 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 06 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 07 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 08 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 09 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 10 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 11 AM PDT           63.41            189         0      Not Applicable
  05/21/2026 12 PM PDT           63.41            189         0      Not Applicable
  05/21/2026 01 PM PDT           63.41            189         0      Not Applicable
  05/21/2026 02 PM PDT           63.39            188         -      Not Applicable
  05/21/2026 03 PM PDT           63.39            188         0      Not Applicable
  05/21/2026 04 PM PDT           63.39            188         0      Not Applicable
  05/21/2026 05 PM PDT           63.39            188         0      Not Applicable
  05/21/2026 06 PM PDT           63.39            188         0      Not Applicable
  05/21/2026 07 PM PDT           63.38            187         -      Not Applicable
  05/21/2026 08 PM PDT           63.38            187         0      Not Applicable
  05/21/2026 09 PM PDT           63.38            187         0      Not Applicable
  05/21/2026 10 PM PDT           63.38            187         0      Not Applicable
  05/21/2026 11 PM PDT           63.38            187         0      Not Applicable
  05/22/2026 12 AM PDT           63.38            187         0      Not Applicable
  05/22/2026 01 AM PDT           63.38            187         0      Not Applicable
  05/22/2026 02 AM PDT           63.38            187         0      Not Applicable
  05/22/2026 03 AM PDT           63.39            188         +      Not Applicable
  05/22/2026 04 AM PDT           63.39            188         0      Not Applicable
  05/22/2026 05 AM PDT           63.38            187         -      Not Applicable
  05/22/2026 06 AM PDT           63.37            186         -      Not Applicable
  05/22/2026 07 AM PDT           63.36            185         -      Not Applicable
  05/22/2026 08 AM PDT           63.35            184         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/22/2026 09 AM PDT           63.35            184                Not Applicable
  05/22/2026 10 AM PDT           63.34            183         -      Not Applicable
  05/22/2026 11 AM PDT           63.33            182         -      Not Applicable
  05/22/2026 12 PM PDT           63.33            182         0      Not Applicable
  05/22/2026 01 PM PDT           63.33            182         0      Not Applicable
  05/22/2026 02 PM PDT           63.32            181         -      Not Applicable
  05/22/2026 03 PM PDT           63.31            181         -      Not Applicable
  05/22/2026 04 PM PDT           63.30            180         -      Not Applicable
  05/22/2026 05 PM PDT           63.30            180         0      Not Applicable
  05/22/2026 06 PM PDT           63.30            180         0      Not Applicable
  05/22/2026 07 PM PDT           63.30            180         0      Not Applicable
  05/22/2026 08 PM PDT           63.29            179         -      Not Applicable
  05/22/2026 09 PM PDT           63.29            179         0      Not Applicable
  05/22/2026 10 PM PDT           63.29            179         0      Not Applicable
  05/22/2026 11 PM PDT           63.28            178         -      Not Applicable
  05/23/2026 12 AM PDT           63.28            178         0      Not Applicable
  05/23/2026 01 AM PDT           63.27            177         -      Not Applicable
  05/23/2026 02 AM PDT           63.27            177         0      Not Applicable
  05/23/2026 03 AM PDT           63.27            177         0      Not Applicable
  05/23/2026 04 AM PDT           63.27            177         0      Not Applicable
  05/23/2026 05 AM PDT           63.26            176         -      Not Applicable
  05/23/2026 06 AM PDT           63.26            176         0      Not Applicable
  05/23/2026 07 AM PDT           63.26            176         0      Not Applicable
  05/23/2026 08 AM PDT           63.26            176         0      Not Applicable
  05/23/2026 09 AM PDT           63.26            176         0      Not Applicable
  05/23/2026 10 AM PDT           63.26            176         0      Not Applicable
  05/23/2026 11 AM PDT           63.26            176         0      Not Applicable
  05/23/2026 12 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 01 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 02 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 03 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 04 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 05 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 06 PM PDT           63.26            176         0      Not Applicable
  05/23/2026 07 PM PDT           63.25            175         -      Not Applicable
  05/23/2026 08 PM PDT           63.25            175         0      Not Applicable
  05/23/2026 09 PM PDT           63.25            175         0      Not Applicable
  05/23/2026 10 PM PDT           63.25            175         0      Not Applicable
  05/23/2026 11 PM PDT           63.24            175         -      Not Applicable
  05/24/2026 12 AM PDT           63.24            175         0      Not Applicable
  05/24/2026 01 AM PDT           63.24            175         0      Not Applicable
  05/24/2026 02 AM PDT           63.24            175         0      Not Applicable
  05/24/2026 03 AM PDT           63.23            174         -      Not Applicable
  05/24/2026 04 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 05 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 06 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 07 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 08 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 09 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 10 AM PDT           63.23            174         0      Not Applicable
  05/24/2026 11 AM PDT           63.22            173         -      Not Applicable
  05/24/2026 12 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 01 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 02 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 03 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 04 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 05 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 06 PM PDT           63.22            173         0      Not Applicable
  05/24/2026 07 PM PDT           63.21            172         -      Not Applicable
  05/24/2026 08 PM PDT           63.21            172         0      Not Applicable
  05/24/2026 09 PM PDT           63.21            172         0      Not Applicable
  05/24/2026 10 PM PDT           63.21            172         0      Not Applicable
  05/24/2026 11 PM PDT           63.21            172         0      Not Applicable
  05/25/2026 12 AM PDT           63.21            172         0      Not Applicable
  05/25/2026 01 AM PDT           63.21            172         0      Not Applicable
  05/25/2026 02 AM PDT           63.21            172         0      Not Applicable
  05/25/2026 03 AM PDT           63.20            171         -      Not Applicable
  05/25/2026 04 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 05 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 06 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 07 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 08 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 09 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 10 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 11 AM PDT           63.20            171         0      Not Applicable
  05/25/2026 12 PM PDT           63.20            171         0      Not Applicable
  05/25/2026 01 PM PDT           63.20            171         0      Not Applicable
  05/25/2026 02 PM PDT           63.19            170         -      Not Applicable
  05/25/2026 03 PM PDT           63.19            170         0      Not Applicable
  05/25/2026 04 PM PDT           63.19            170         0      Not Applicable
  05/25/2026 05 PM PDT           63.19            170         0      Not Applicable
  05/25/2026 06 PM PDT           63.18            170         -      Not Applicable
  05/25/2026 07 PM PDT           63.18            170         0      Not Applicable
  05/25/2026 08 PM PDT           63.18            170         0      Not Applicable
  05/25/2026 09 PM PDT           63.18            170         0      Not Applicable
  05/25/2026 10 PM PDT           63.18            170         0      Not Applicable
  05/25/2026 11 PM PDT           63.18            170         0      Not Applicable
  05/26/2026 12 AM PDT           63.17            169         -      Not Applicable
  05/26/2026 01 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 02 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 03 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 04 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 05 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 06 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 07 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 08 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 09 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 10 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 11 AM PDT           63.17            169         0      Not Applicable
  05/26/2026 12 PM PDT           63.16            168         -      Not Applicable
  05/26/2026 01 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 02 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 03 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 04 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 05 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 06 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 07 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 08 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 09 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 10 PM PDT           63.16            168         0      Not Applicable
  05/26/2026 11 PM PDT           63.16            168         0      Not Applicable
  05/27/2026 12 AM PDT           63.16            168         0      Not Applicable
  05/27/2026 01 AM PDT           63.16            168         0      Not Applicable
  05/27/2026 02 AM PDT           63.16            168         0      Not Applicable
  05/27/2026 03 AM PDT           63.15            167         -      Not Applicable
  05/27/2026 04 AM PDT           63.15            167         0      Not Applicable
  05/27/2026 05 AM PDT           63.15            167         0      Not Applicable
#
# NOTE 1: Stages are rounded to the nearest hundredth (.01) of a foot.
# NOTE 2: Flows are rounded to the nearest (1) cfs.
# NOTE 3: Trends are determined using hourly change in unrounded stage and flow.
# NOTE 4: Maximum Values are determined using unrounded stage and flow.