SAN JOAQUIN RIVER - VERNALIS (VNSC1)
Latitude: 37.68º NLongitude: 121.27º WElevation: 35 FeetForecast Type: Official Location
Location: San Joaquin County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Aug 18 2026 at 7:11 AM PDTNext Issuance: Aug 19 2026 at 9:00 AM PDT
Action/Monitor: 24.5 FeetMinor Flood: 29.0 FeetModerate Flood: 32.0 FeetMajor Flood: 37.3 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Vernalis (VNSC1)
#
# File Generation Time:  08/18/2026 at 07:11 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  08/17/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       7.72 Feet
# Maximum Observed Flow:                        886 cfs
#
# Earliest Date & Time of Maximum Forecast:     08/18/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       7.46 Feet
# Maximum Forecast Flow:                        756 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  08/13/2026 07 AM PDT            7.20            636                        Normal
  08/13/2026 08 AM PDT            7.19            631         -              Normal
  08/13/2026 09 AM PDT            7.22            645         +              Normal
  08/13/2026 10 AM PDT            7.21            640         -              Normal
  08/13/2026 11 AM PDT            7.21            640         0              Normal
  08/13/2026 12 PM PDT            7.22            645         +              Normal
  08/13/2026 01 PM PDT            7.19            631         -              Normal
  08/13/2026 02 PM PDT            7.20            636         +              Normal
  08/13/2026 03 PM PDT            7.15            614         -              Normal
  08/13/2026 04 PM PDT            7.14            609         -              Normal
  08/13/2026 05 PM PDT            7.13            605         -              Normal
  08/13/2026 06 PM PDT            7.11            596         -              Normal
  08/13/2026 07 PM PDT            7.11            596         0              Normal
  08/13/2026 08 PM PDT            7.13            605         +              Normal
  08/13/2026 09 PM PDT            7.14            609         +              Normal
  08/13/2026 10 PM PDT            7.11            596         -              Normal
  08/13/2026 11 PM PDT            7.11            596         0              Normal
  08/14/2026 12 AM PDT            7.12            601         +              Normal
  08/14/2026 01 AM PDT            7.15            614         +              Normal
  08/14/2026 02 AM PDT            7.17            623         +              Normal
  08/14/2026 03 AM PDT            7.18            627         +              Normal
  08/14/2026 04 AM PDT            7.19            631         +              Normal
  08/14/2026 05 AM PDT            7.19            631         0              Normal
  08/14/2026 06 AM PDT            7.19            631         0              Normal
  08/14/2026 07 AM PDT            7.19            631         0              Normal
  08/14/2026 08 AM PDT            7.19            631         0              Normal
  08/14/2026 09 AM PDT            7.18            627         -              Normal
  08/14/2026 10 AM PDT            7.18            627         0              Normal
  08/14/2026 11 AM PDT            7.17            623         -              Normal
  08/14/2026 12 PM PDT            7.15            614         -              Normal
  08/14/2026 01 PM PDT            7.13            605         -              Normal
  08/14/2026 02 PM PDT            7.12            601         -              Normal
  08/14/2026 03 PM PDT            7.11            596         -              Normal
  08/14/2026 04 PM PDT            7.10            592         -              Normal
  08/14/2026 05 PM PDT            7.07            579         -              Normal
  08/14/2026 06 PM PDT            7.06            575         -              Normal
  08/14/2026 07 PM PDT            7.05            571         -              Normal
  08/14/2026 08 PM PDT            7.03            562         -              Normal
  08/14/2026 09 PM PDT            7.05            571         +              Normal
  08/14/2026 10 PM PDT            7.04            566         -              Normal
  08/14/2026 11 PM PDT            7.06            575         +              Normal
  08/15/2026 12 AM PDT            7.09            588         +              Normal
  08/15/2026 01 AM PDT            7.09            588         0              Normal
  08/15/2026 02 AM PDT            7.09            588         0              Normal
  08/15/2026 03 AM PDT            7.09            588         0              Normal
  08/15/2026 04 AM PDT            7.09            588         0              Normal
  08/15/2026 05 AM PDT            7.11            596         +              Normal
  08/15/2026 06 AM PDT            7.12            601         +              Normal
  08/15/2026 07 AM PDT            7.14            609         +              Normal
  08/15/2026 08 AM PDT            7.15            614         +              Normal
  08/15/2026 09 AM PDT            7.15            614         0              Normal
  08/15/2026 10 AM PDT            7.18            627         +              Normal
  08/15/2026 11 AM PDT            7.18            627         0              Normal
  08/15/2026 12 PM PDT            7.20            636         +              Normal
  08/15/2026 01 PM PDT            7.20            636         0              Normal
  08/15/2026 02 PM PDT            7.21            640         +              Normal
  08/15/2026 03 PM PDT            7.21            640         0              Normal
  08/15/2026 04 PM PDT            7.22            645         +              Normal
  08/15/2026 05 PM PDT            7.20            636         -              Normal
  08/15/2026 06 PM PDT            7.20            636         0              Normal
  08/15/2026 07 PM PDT            7.20            636         0              Normal
  08/15/2026 08 PM PDT            7.22            645         +              Normal
  08/15/2026 09 PM PDT            7.25            658         +              Normal
  08/15/2026 10 PM PDT            7.25            658         0              Normal
  08/15/2026 11 PM PDT            7.25            658         0              Normal
  08/16/2026 12 AM PDT            7.27            667         +              Normal
  08/16/2026 01 AM PDT            7.26            663         -              Normal
  08/16/2026 02 AM PDT            7.29            677         +              Normal
  08/16/2026 03 AM PDT            7.30            681         +              Normal
  08/16/2026 04 AM PDT            7.32            690         +              Normal
  08/16/2026 05 AM PDT            7.34            700         +              Normal
  08/16/2026 06 AM PDT            7.36            709         +              Normal
  08/16/2026 07 AM PDT            7.38            718         +              Normal
  08/16/2026 08 AM PDT            7.36            709         -              Normal
  08/16/2026 09 AM PDT            7.36            709         0              Normal
  08/16/2026 10 AM PDT            7.37            714         +              Normal
  08/16/2026 11 AM PDT            7.37            714         0              Normal
  08/16/2026 12 PM PDT            7.39            723         +              Normal
  08/16/2026 01 PM PDT            7.42            737         +              Normal
  08/16/2026 02 PM PDT            7.44            747         +              Normal
  08/16/2026 03 PM PDT            7.46            756         +              Normal
  08/16/2026 04 PM PDT            7.48            766         +              Normal
  08/16/2026 05 PM PDT            7.51            781         +              Normal
  08/16/2026 06 PM PDT            7.52            786         +              Normal
  08/16/2026 07 PM PDT            7.55            800         +              Normal
  08/16/2026 08 PM PDT            7.58            815         +              Normal
  08/16/2026 09 PM PDT            7.61            830         +              Normal
  08/16/2026 10 PM PDT            7.63            840         +              Normal
  08/16/2026 11 PM PDT            7.65            850         +              Normal
  08/17/2026 12 AM PDT            7.67            860         +              Normal
  08/17/2026 01 AM PDT            7.69            870         +              Normal
  08/17/2026 02 AM PDT            7.70            876         +              Normal
  08/17/2026 03 AM PDT            7.71            881         +              Normal
  08/17/2026 04 AM PDT            7.72            886         +              Normal
  08/17/2026 05 AM PDT            7.72            886         0              Normal
  08/17/2026 06 AM PDT            7.72            886         0              Normal
  08/17/2026 07 AM PDT            7.72            886         0              Normal
  08/17/2026 08 AM PDT            7.71            881         -              Normal
  08/17/2026 09 AM PDT            7.71            881         0              Normal
  08/17/2026 10 AM PDT            7.69            870         -              Normal
  08/17/2026 11 AM PDT            7.65            850         -              Normal
  08/17/2026 12 PM PDT            7.62            835         -              Normal
  08/17/2026 01 PM PDT            7.60            825         -              Normal
  08/17/2026 02 PM PDT            7.58            815         -              Normal
  08/17/2026 03 PM PDT            7.56            805         -              Normal
  08/17/2026 04 PM PDT            7.50            776         -              Normal
  08/17/2026 05 PM PDT            7.47            761         -              Normal
  08/17/2026 06 PM PDT            7.46            756         -              Normal
  08/17/2026 07 PM PDT            7.45            752         -              Normal
  08/17/2026 08 PM PDT            7.44            747         -              Normal
  08/17/2026 09 PM PDT            7.40            728         -              Normal
  08/17/2026 10 PM PDT            7.37            714         -              Normal
  08/17/2026 11 PM PDT            7.37            714         0              Normal
  08/18/2026 12 AM PDT            7.37            714         0              Normal
  08/18/2026 01 AM PDT            7.40            728         +              Normal
  08/18/2026 02 AM PDT            7.43            742         +              Normal
  08/18/2026 03 AM PDT            7.45            752         +              Normal
  08/18/2026 04 AM PDT            7.46            756         +              Normal
  08/18/2026 05 AM PDT            7.47            761         +              Normal
  08/18/2026 06 AM PDT            7.47            761         0              Normal
  08/18/2026 07 AM PDT            7.47            761         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  08/18/2026 08 AM PDT            7.46            756                        Normal
  08/18/2026 09 AM PDT            7.46            756         0              Normal
  08/18/2026 10 AM PDT            7.46            756         0              Normal
  08/18/2026 11 AM PDT            7.46            756         0              Normal
  08/18/2026 12 PM PDT            7.46            756         0              Normal
  08/18/2026 01 PM PDT            7.45            752         -              Normal
  08/18/2026 02 PM PDT            7.45            752         0              Normal
  08/18/2026 03 PM PDT            7.45            752         0              Normal
  08/18/2026 04 PM PDT            7.45            752         0              Normal
  08/18/2026 05 PM PDT            7.45            752         0              Normal
  08/18/2026 06 PM PDT            7.45            752         0              Normal
  08/18/2026 07 PM PDT            7.44            747         -              Normal
  08/18/2026 08 PM PDT            7.44            747         0              Normal
  08/18/2026 09 PM PDT            7.44            747         0              Normal
  08/18/2026 10 PM PDT            7.44            747         0              Normal
  08/18/2026 11 PM PDT            7.44            747         0              Normal
  08/19/2026 12 AM PDT            7.43            742         -              Normal
  08/19/2026 01 AM PDT            7.43            742         0              Normal
  08/19/2026 02 AM PDT            7.43            742         0              Normal
  08/19/2026 03 AM PDT            7.43            742         0              Normal
  08/19/2026 04 AM PDT            7.43            742         0              Normal
  08/19/2026 05 AM PDT            7.43            742         0              Normal
  08/19/2026 06 AM PDT            7.42            737         -              Normal
  08/19/2026 07 AM PDT            7.42            737         0              Normal
  08/19/2026 08 AM PDT            7.42            737         0              Normal
  08/19/2026 09 AM PDT            7.42            737         0              Normal
  08/19/2026 10 AM PDT            7.42            737         0              Normal
  08/19/2026 11 AM PDT            7.42            737         0              Normal
  08/19/2026 12 PM PDT            7.41            733         -              Normal
  08/19/2026 01 PM PDT            7.41            733         0              Normal
  08/19/2026 02 PM PDT            7.41            733         0              Normal
  08/19/2026 03 PM PDT            7.41            733         0              Normal
  08/19/2026 04 PM PDT            7.41            733         0              Normal
  08/19/2026 05 PM PDT            7.41            733         0              Normal
  08/19/2026 06 PM PDT            7.41            733         0              Normal
  08/19/2026 07 PM PDT            7.40            728         -              Normal
  08/19/2026 08 PM PDT            7.40            728         0              Normal
  08/19/2026 09 PM PDT            7.40            728         0              Normal
  08/19/2026 10 PM PDT            7.40            728         0              Normal
  08/19/2026 11 PM PDT            7.40            728         0              Normal
  08/20/2026 12 AM PDT            7.39            723         -              Normal
  08/20/2026 01 AM PDT            7.39            723         0              Normal
  08/20/2026 02 AM PDT            7.39            723         0              Normal
  08/20/2026 03 AM PDT            7.39            723         0              Normal
  08/20/2026 04 AM PDT            7.39            723         0              Normal
  08/20/2026 05 AM PDT            7.39            723         0              Normal
  08/20/2026 06 AM PDT            7.38            718         -              Normal
  08/20/2026 07 AM PDT            7.38            718         0              Normal
  08/20/2026 08 AM PDT            7.38            718         0              Normal
  08/20/2026 09 AM PDT            7.38            718         0              Normal
  08/20/2026 10 AM PDT            7.38            718         0              Normal
  08/20/2026 11 AM PDT            7.38            718         0              Normal
  08/20/2026 12 PM PDT            7.38            718         0              Normal
  08/20/2026 01 PM PDT            7.38            718         0              Normal
  08/20/2026 02 PM PDT            7.37            714         -              Normal
  08/20/2026 03 PM PDT            7.37            714         0              Normal
  08/20/2026 04 PM PDT            7.37            714         0              Normal
  08/20/2026 05 PM PDT            7.37            714         0              Normal
  08/20/2026 06 PM PDT            7.37            714         0              Normal
  08/20/2026 07 PM PDT            7.37            714         0              Normal
  08/20/2026 08 PM PDT            7.37            714         0              Normal
  08/20/2026 09 PM PDT            7.36            709         -              Normal
  08/20/2026 10 PM PDT            7.36            709         0              Normal
  08/20/2026 11 PM PDT            7.36            709         0              Normal
  08/21/2026 12 AM PDT            7.36            709         0              Normal
  08/21/2026 01 AM PDT            7.36            709         0              Normal
  08/21/2026 02 AM PDT            7.36            709         0              Normal
  08/21/2026 03 AM PDT            7.36            709         0              Normal
  08/21/2026 04 AM PDT            7.36            709         0              Normal
  08/21/2026 05 AM PDT            7.35            704         -              Normal
  08/21/2026 06 AM PDT            7.35            704         0              Normal
  08/21/2026 07 AM PDT            7.35            704         0              Normal
  08/21/2026 08 AM PDT            7.35            704         0              Normal
  08/21/2026 09 AM PDT            7.35            704         0              Normal
  08/21/2026 10 AM PDT            7.35            704         0              Normal
  08/21/2026 11 AM PDT            7.35            704         0              Normal
  08/21/2026 12 PM PDT            7.35            704         0              Normal
  08/21/2026 01 PM PDT            7.34            700         -              Normal
  08/21/2026 02 PM PDT            7.34            700         0              Normal
  08/21/2026 03 PM PDT            7.34            700         0              Normal
  08/21/2026 04 PM PDT            7.34            700         0              Normal
  08/21/2026 05 PM PDT            7.34            700         0              Normal
  08/21/2026 06 PM PDT            7.34            700         0              Normal
  08/21/2026 07 PM PDT            7.34            700         0              Normal
  08/21/2026 08 PM PDT            7.34            700         0              Normal
  08/21/2026 09 PM PDT            7.34            700         0              Normal
  08/21/2026 10 PM PDT            7.34            700         0              Normal
  08/21/2026 11 PM PDT            7.34            700         0              Normal
  08/22/2026 12 AM PDT            7.33            695         -              Normal
  08/22/2026 01 AM PDT            7.33            695         0              Normal
  08/22/2026 02 AM PDT            7.33            695         0              Normal
  08/22/2026 03 AM PDT            7.33            695         0              Normal
  08/22/2026 04 AM PDT            7.33            695         0              Normal
  08/22/2026 05 AM PDT            7.33            695         0              Normal
  08/22/2026 06 AM PDT            7.33            695         0              Normal
  08/22/2026 07 AM PDT            7.33            695         0              Normal
  08/22/2026 08 AM PDT            7.33            695         0              Normal
  08/22/2026 09 AM PDT            7.33            695         0              Normal
  08/22/2026 10 AM PDT            7.33            695         0              Normal
  08/22/2026 11 AM PDT            7.33            695         0              Normal
  08/22/2026 12 PM PDT            7.33            695         0              Normal
  08/22/2026 01 PM PDT            7.33            695         0              Normal
  08/22/2026 02 PM PDT            7.33            695         0              Normal
  08/22/2026 03 PM PDT            7.32            690         -              Normal
  08/22/2026 04 PM PDT            7.32            690         0              Normal
  08/22/2026 05 PM PDT            7.32            690         0              Normal
  08/22/2026 06 PM PDT            7.32            690         0              Normal
  08/22/2026 07 PM PDT            7.32            690         0              Normal
  08/22/2026 08 PM PDT            7.32            690         0              Normal
  08/22/2026 09 PM PDT            7.32            690         0              Normal
  08/22/2026 10 PM PDT            7.32            690         0              Normal
  08/22/2026 11 PM PDT            7.32            690         0              Normal
  08/23/2026 12 AM PDT            7.32            690         0              Normal
  08/23/2026 01 AM PDT            7.32            690         0              Normal
  08/23/2026 02 AM PDT            7.32            690         0              Normal
  08/23/2026 03 AM PDT            7.32            690         0              Normal
  08/23/2026 04 AM PDT            7.32            690         0              Normal
  08/23/2026 05 AM PDT            7.32            690         0              Normal
#
# 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.