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: Mar 18 2026 at 7:32 AM PDTNext Issuance: Mar 18 2026 at 3:00 PM 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:  03/18/2026 at 07:32 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/16/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       12.89 Feet
# Maximum Observed Flow:                        4969 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/18/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       12.56 Feet
# Maximum Forecast Flow:                        4639 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/13/2026 07 AM PDT           12.64           4718                        Normal
  03/13/2026 08 AM PDT           12.65           4728         +              Normal
  03/13/2026 09 AM PDT           12.65           4728         0              Normal
  03/13/2026 10 AM PDT           12.64           4718         -              Normal
  03/13/2026 11 AM PDT           12.65           4728         +              Normal
  03/13/2026 12 PM PDT           12.63           4708         -              Normal
  03/13/2026 01 PM PDT           12.63           4708         0              Normal
  03/13/2026 02 PM PDT           12.64           4718         +              Normal
  03/13/2026 03 PM PDT           12.63           4708         -              Normal
  03/13/2026 04 PM PDT           12.64           4718         +              Normal
  03/13/2026 05 PM PDT           12.64           4718         0              Normal
  03/13/2026 06 PM PDT           12.67           4748         +              Normal
  03/13/2026 07 PM PDT           12.67           4748         0              Normal
  03/13/2026 08 PM PDT           12.67           4748         0              Normal
  03/13/2026 09 PM PDT           12.66           4738         -              Normal
  03/13/2026 10 PM PDT           12.66           4738         0              Normal
  03/13/2026 11 PM PDT           12.65           4728         -              Normal
  03/14/2026 12 AM PDT           12.66           4738         +              Normal
  03/14/2026 01 AM PDT           12.66           4738         0              Normal
  03/14/2026 02 AM PDT           12.67           4748         +              Normal
  03/14/2026 03 AM PDT           12.68           4758         +              Normal
  03/14/2026 04 AM PDT           12.69           4768         +              Normal
  03/14/2026 05 AM PDT           12.70           4778         +              Normal
  03/14/2026 06 AM PDT           12.71           4788         +              Normal
  03/14/2026 07 AM PDT           12.72           4797         +              Normal
  03/14/2026 08 AM PDT           12.72           4797         0              Normal
  03/14/2026 09 AM PDT           12.73           4807         +              Normal
  03/14/2026 10 AM PDT           12.73           4807         0              Normal
  03/14/2026 11 AM PDT           12.75           4828         +              Normal
  03/14/2026 12 PM PDT           12.72           4797         -              Normal
  03/14/2026 01 PM PDT           12.74           4817         +              Normal
  03/14/2026 02 PM PDT           12.75           4828         +              Normal
  03/14/2026 03 PM PDT           12.75           4828         0              Normal
  03/14/2026 04 PM PDT           12.75           4828         0              Normal
  03/14/2026 05 PM PDT           12.75           4828         0              Normal
  03/14/2026 06 PM PDT           12.76           4838         +              Normal
  03/14/2026 07 PM PDT           12.78           4858         +              Normal
  03/14/2026 08 PM PDT           12.78           4858         0              Normal
  03/14/2026 09 PM PDT           12.78           4858         0              Normal
  03/14/2026 10 PM PDT           12.78           4858         0              Normal
  03/14/2026 11 PM PDT           12.77           4848         -              Normal
  03/15/2026 12 AM PDT           12.78           4858         +              Normal
  03/15/2026 01 AM PDT           12.78           4858         0              Normal
  03/15/2026 02 AM PDT           12.78           4858         0              Normal
  03/15/2026 03 AM PDT           12.78           4858         0              Normal
  03/15/2026 04 AM PDT           12.79           4868         +              Normal
  03/15/2026 05 AM PDT           12.80           4878         +              Normal
  03/15/2026 06 AM PDT           12.79           4868         -              Normal
  03/15/2026 07 AM PDT           12.80           4878         +              Normal
  03/15/2026 08 AM PDT           12.80           4878         0              Normal
  03/15/2026 09 AM PDT           12.80           4878         0              Normal
  03/15/2026 10 AM PDT           12.79           4868         -              Normal
  03/15/2026 11 AM PDT           12.80           4878         +              Normal
  03/15/2026 12 PM PDT           12.78           4858         -              Normal
  03/15/2026 01 PM PDT           12.80           4878         +              Normal
  03/15/2026 02 PM PDT           12.79           4868         -              Normal
  03/15/2026 03 PM PDT           12.80           4878         +              Normal
  03/15/2026 04 PM PDT           12.79           4868         -              Normal
  03/15/2026 05 PM PDT           12.81           4888         +              Normal
  03/15/2026 06 PM PDT           12.83           4908         +              Normal
  03/15/2026 07 PM PDT           12.84           4918         +              Normal
  03/15/2026 08 PM PDT           12.84           4918         0              Normal
  03/15/2026 09 PM PDT           12.84           4918         0              Normal
  03/15/2026 10 PM PDT           12.85           4928         +              Normal
  03/15/2026 11 PM PDT           12.85           4928         0              Normal
  03/16/2026 12 AM PDT           12.85           4928         0              Normal
  03/16/2026 01 AM PDT           12.86           4938         +              Normal
  03/16/2026 02 AM PDT           12.87           4948         +              Normal
  03/16/2026 03 AM PDT           12.87           4948         0              Normal
  03/16/2026 04 AM PDT           12.87           4948         0              Normal
  03/16/2026 05 AM PDT           12.89           4969         +              Normal
  03/16/2026 06 AM PDT           12.89           4969         0              Normal
  03/16/2026 07 AM PDT           12.89           4969         0              Normal
  03/16/2026 08 AM PDT           12.89           4969         0              Normal
  03/16/2026 09 AM PDT           12.88           4958         -              Normal
  03/16/2026 10 AM PDT           12.85           4928         -              Normal
  03/16/2026 11 AM PDT           12.84           4918         -              Normal
  03/16/2026 12 PM PDT           12.81           4888         -              Normal
  03/16/2026 01 PM PDT           12.78           4858         -              Normal
  03/16/2026 02 PM PDT           12.78           4858         0              Normal
  03/16/2026 03 PM PDT           12.76           4838         -              Normal
  03/16/2026 04 PM PDT           12.76           4838         0              Normal
  03/16/2026 05 PM PDT           12.75           4828         -              Normal
  03/16/2026 06 PM PDT           12.75           4828         0              Normal
  03/16/2026 07 PM PDT           12.75           4828         0              Normal
  03/16/2026 08 PM PDT           12.74           4817         -              Normal
  03/16/2026 09 PM PDT           12.73           4807         -              Normal
  03/16/2026 10 PM PDT           12.72           4797         -              Normal
  03/16/2026 11 PM PDT           12.70           4778         -              Normal
  03/17/2026 12 AM PDT           12.69           4768         -              Normal
  03/17/2026 01 AM PDT           12.70           4778         +              Normal
  03/17/2026 02 AM PDT           12.70           4778         0              Normal
  03/17/2026 03 AM PDT           12.70           4778         0              Normal
  03/17/2026 04 AM PDT           12.71           4788         +              Normal
  03/17/2026 05 AM PDT           12.70           4778         -              Normal
  03/17/2026 06 AM PDT           12.70           4778         0              Normal
  03/17/2026 07 AM PDT           12.70           4778         0              Normal
  03/17/2026 08 AM PDT           12.69           4768         -              Normal
  03/17/2026 09 AM PDT           12.68           4758         -              Normal
  03/17/2026 10 AM PDT           12.68           4758         0              Normal
  03/17/2026 11 AM PDT           12.67           4748         -              Normal
  03/17/2026 12 PM PDT           12.68           4758         +              Normal
  03/17/2026 01 PM PDT           12.67           4748         -              Normal
  03/17/2026 02 PM PDT           12.67           4748         0              Normal
  03/17/2026 03 PM PDT           12.67           4748         0              Normal
  03/17/2026 04 PM PDT           12.66           4738         -              Normal
  03/17/2026 05 PM PDT           12.66           4738         0              Normal
  03/17/2026 06 PM PDT           12.65           4728         -              Normal
  03/17/2026 07 PM PDT           12.63           4708         -              Normal
  03/17/2026 08 PM PDT           12.62           4698         -              Normal
  03/17/2026 09 PM PDT           12.61           4688         -              Normal
  03/17/2026 10 PM PDT           12.59           4668         -              Normal
  03/17/2026 11 PM PDT           12.59           4668         0              Normal
  03/18/2026 12 AM PDT           12.58           4658         -              Normal
  03/18/2026 01 AM PDT           12.57           4649         -              Normal
  03/18/2026 02 AM PDT           12.56           4639         -              Normal
  03/18/2026 03 AM PDT           12.57           4649         +              Normal
  03/18/2026 04 AM PDT           12.57           4649         0              Normal
  03/18/2026 05 AM PDT           12.56           4639         -              Normal
  03/18/2026 06 AM PDT           12.56           4639         0              Normal
  03/18/2026 07 AM PDT           12.56           4639         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/18/2026 08 AM PDT           12.56           4639                        Normal
  03/18/2026 09 AM PDT           12.56           4639         0              Normal
  03/18/2026 10 AM PDT           12.55           4629         -              Normal
  03/18/2026 11 AM PDT           12.55           4629         0              Normal
  03/18/2026 12 PM PDT           12.55           4629         0              Normal
  03/18/2026 01 PM PDT           12.54           4619         -              Normal
  03/18/2026 02 PM PDT           12.54           4619         0              Normal
  03/18/2026 03 PM PDT           12.53           4609         -              Normal
  03/18/2026 04 PM PDT           12.52           4599         -              Normal
  03/18/2026 05 PM PDT           12.51           4590         -              Normal
  03/18/2026 06 PM PDT           12.50           4580         -              Normal
  03/18/2026 07 PM PDT           12.49           4570         -              Normal
  03/18/2026 08 PM PDT           12.47           4550         -              Normal
  03/18/2026 09 PM PDT           12.46           4541         -              Normal
  03/18/2026 10 PM PDT           12.44           4521         -              Normal
  03/18/2026 11 PM PDT           12.43           4511         -              Normal
  03/19/2026 12 AM PDT           12.41           4492         -              Normal
  03/19/2026 01 AM PDT           12.40           4482         -              Normal
  03/19/2026 02 AM PDT           12.38           4463         -              Normal
  03/19/2026 03 AM PDT           12.37           4453         -              Normal
  03/19/2026 04 AM PDT           12.35           4434         -              Normal
  03/19/2026 05 AM PDT           12.34           4424         -              Normal
  03/19/2026 06 AM PDT           12.32           4405         -              Normal
  03/19/2026 07 AM PDT           12.30           4386         -              Normal
  03/19/2026 08 AM PDT           12.28           4366         -              Normal
  03/19/2026 09 AM PDT           12.26           4347         -              Normal
  03/19/2026 10 AM PDT           12.24           4328         -              Normal
  03/19/2026 11 AM PDT           12.22           4309         -              Normal
  03/19/2026 12 PM PDT           12.20           4290         -              Normal
  03/19/2026 01 PM PDT           12.18           4271         -              Normal
  03/19/2026 02 PM PDT           12.16           4252         -              Normal
  03/19/2026 03 PM PDT           12.14           4233         -              Normal
  03/19/2026 04 PM PDT           12.12           4214         -              Normal
  03/19/2026 05 PM PDT           12.10           4195         -              Normal
  03/19/2026 06 PM PDT           12.07           4167         -              Normal
  03/19/2026 07 PM PDT           12.05           4148         -              Normal
  03/19/2026 08 PM PDT           12.03           4129         -              Normal
  03/19/2026 09 PM PDT           12.01           4110         -              Normal
  03/19/2026 10 PM PDT           11.99           4092         -              Normal
  03/19/2026 11 PM PDT           11.97           4073         -              Normal
  03/20/2026 12 AM PDT           11.95           4054         -              Normal
  03/20/2026 01 AM PDT           11.93           4036         -              Normal
  03/20/2026 02 AM PDT           11.91           4017         -              Normal
  03/20/2026 03 AM PDT           11.89           3999         -              Normal
  03/20/2026 04 AM PDT           11.88           3989         -              Normal
  03/20/2026 05 AM PDT           11.86           3971         -              Normal
  03/20/2026 06 AM PDT           11.84           3953         -              Normal
  03/20/2026 07 AM PDT           11.82           3934         -              Normal
  03/20/2026 08 AM PDT           11.81           3925         -              Normal
  03/20/2026 09 AM PDT           11.79           3907         -              Normal
  03/20/2026 10 AM PDT           11.77           3888         -              Normal
  03/20/2026 11 AM PDT           11.75           3870         -              Normal
  03/20/2026 12 PM PDT           11.73           3852         -              Normal
  03/20/2026 01 PM PDT           11.71           3834         -              Normal
  03/20/2026 02 PM PDT           11.69           3815         -              Normal
  03/20/2026 03 PM PDT           11.67           3797         -              Normal
  03/20/2026 04 PM PDT           11.65           3779         -              Normal
  03/20/2026 05 PM PDT           11.63           3761         -              Normal
  03/20/2026 06 PM PDT           11.61           3743         -              Normal
  03/20/2026 07 PM PDT           11.59           3725         -              Normal
  03/20/2026 08 PM PDT           11.57           3707         -              Normal
  03/20/2026 09 PM PDT           11.55           3689         -              Normal
  03/20/2026 10 PM PDT           11.53           3671         -              Normal
  03/20/2026 11 PM PDT           11.51           3654         -              Normal
  03/21/2026 12 AM PDT           11.49           3636         -              Normal
  03/21/2026 01 AM PDT           11.48           3627         -              Normal
  03/21/2026 02 AM PDT           11.46           3609         -              Normal
  03/21/2026 03 AM PDT           11.44           3592         -              Normal
  03/21/2026 04 AM PDT           11.43           3583         -              Normal
  03/21/2026 05 AM PDT           11.41           3565         -              Normal
  03/21/2026 06 AM PDT           11.39           3547         -              Normal
  03/21/2026 07 AM PDT           11.38           3539         -              Normal
  03/21/2026 08 AM PDT           11.36           3521         -              Normal
  03/21/2026 09 AM PDT           11.35           3512         -              Normal
  03/21/2026 10 AM PDT           11.33           3495         -              Normal
  03/21/2026 11 AM PDT           11.31           3477         -              Normal
  03/21/2026 12 PM PDT           11.29           3460         -              Normal
  03/21/2026 01 PM PDT           11.27           3443         -              Normal
  03/21/2026 02 PM PDT           11.25           3425         -              Normal
  03/21/2026 03 PM PDT           11.23           3408         -              Normal
  03/21/2026 04 PM PDT           11.21           3391         -              Normal
  03/21/2026 05 PM PDT           11.20           3382         -              Normal
  03/21/2026 06 PM PDT           11.18           3365         -              Normal
  03/21/2026 07 PM PDT           11.16           3348         -              Normal
  03/21/2026 08 PM PDT           11.14           3330         -              Normal
  03/21/2026 09 PM PDT           11.12           3313         -              Normal
  03/21/2026 10 PM PDT           11.10           3296         -              Normal
  03/21/2026 11 PM PDT           11.08           3279         -              Normal
  03/22/2026 12 AM PDT           11.07           3270         -              Normal
  03/22/2026 01 AM PDT           11.05           3253         -              Normal
  03/22/2026 02 AM PDT           11.04           3245         -              Normal
  03/22/2026 03 AM PDT           11.02           3227         -              Normal
  03/22/2026 04 AM PDT           11.01           3219         -              Normal
  03/22/2026 05 AM PDT           10.99           3201         -              Normal
  03/22/2026 06 AM PDT           10.98           3193         -              Normal
  03/22/2026 07 AM PDT           10.96           3175         -              Normal
  03/22/2026 08 AM PDT           10.95           3166         -              Normal
  03/22/2026 09 AM PDT           10.93           3148         -              Normal
  03/22/2026 10 AM PDT           10.92           3139         -              Normal
  03/22/2026 11 AM PDT           10.90           3122         -              Normal
  03/22/2026 12 PM PDT           10.89           3113         -              Normal
  03/22/2026 01 PM PDT           10.87           3095         -              Normal
  03/22/2026 02 PM PDT           10.85           3078         -              Normal
  03/22/2026 03 PM PDT           10.84           3069         -              Normal
  03/22/2026 04 PM PDT           10.82           3052         -              Normal
  03/22/2026 05 PM PDT           10.80           3034         -              Normal
  03/22/2026 06 PM PDT           10.79           3025         -              Normal
  03/22/2026 07 PM PDT           10.77           3008         -              Normal
  03/22/2026 08 PM PDT           10.75           2991         -              Normal
  03/22/2026 09 PM PDT           10.73           2973         -              Normal
  03/22/2026 10 PM PDT           10.72           2965         -              Normal
  03/22/2026 11 PM PDT           10.70           2948         -              Normal
  03/23/2026 12 AM PDT           10.69           2939         -              Normal
  03/23/2026 01 AM PDT           10.67           2922         -              Normal
  03/23/2026 02 AM PDT           10.66           2913         -              Normal
  03/23/2026 03 AM PDT           10.64           2896         -              Normal
  03/23/2026 04 AM PDT           10.63           2888         -              Normal
  03/23/2026 05 AM PDT           10.62           2879         -              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.