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: May 17 2026 at 7:36 AM PDTNext Issuance: May 18 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:  05/17/2026 at 07:36 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/17/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       9.98 Feet
# Maximum Observed Flow:                        2357 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/20/2026 at 04:00 PM PDT
# Maximum Forecast Stage:                       10.20 Feet
# Maximum Forecast Flow:                        2531 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/12/2026 07 AM PDT            8.28           1194                        Normal
  05/12/2026 08 AM PDT            8.26           1182         -              Normal
  05/12/2026 09 AM PDT            8.26           1182         0              Normal
  05/12/2026 10 AM PDT            8.27           1188         +              Normal
  05/12/2026 11 AM PDT            8.24           1170         -              Normal
  05/12/2026 12 PM PDT            8.22           1159         -              Normal
  05/12/2026 01 PM PDT            8.18           1136         -              Normal
  05/12/2026 02 PM PDT            8.16           1124         -              Normal
  05/12/2026 03 PM PDT            8.13           1107         -              Normal
  05/12/2026 04 PM PDT            8.13           1107         0              Normal
  05/12/2026 05 PM PDT            8.12           1102         -              Normal
  05/12/2026 06 PM PDT            8.13           1107         +              Normal
  05/12/2026 07 PM PDT            8.14           1113         +              Normal
  05/12/2026 08 PM PDT            8.17           1130         +              Normal
  05/12/2026 09 PM PDT            8.19           1142         +              Normal
  05/12/2026 10 PM PDT            8.23           1165         +              Normal
  05/12/2026 11 PM PDT            8.23           1165         0              Normal
  05/13/2026 12 AM PDT            8.26           1182         +              Normal
  05/13/2026 01 AM PDT            8.30           1205         +              Normal
  05/13/2026 02 AM PDT            8.35           1235         +              Normal
  05/13/2026 03 AM PDT            8.40           1265         +              Normal
  05/13/2026 04 AM PDT            8.45           1295         +              Normal
  05/13/2026 05 AM PDT            8.48           1313         +              Normal
  05/13/2026 06 AM PDT            8.52           1338         +              Normal
  05/13/2026 07 AM PDT            8.55           1356         +              Normal
  05/13/2026 08 AM PDT            8.58           1375         +              Normal
  05/13/2026 09 AM PDT            8.61           1393         +              Normal
  05/13/2026 10 AM PDT            8.65           1418         +              Normal
  05/13/2026 11 AM PDT            8.65           1418         0              Normal
  05/13/2026 12 PM PDT            8.66           1425         +              Normal
  05/13/2026 01 PM PDT            8.68           1437         +              Normal
  05/13/2026 02 PM PDT            8.68           1437         0              Normal
  05/13/2026 03 PM PDT            8.69           1444         +              Normal
  05/13/2026 04 PM PDT            8.71           1456         +              Normal
  05/13/2026 05 PM PDT            8.70           1450         -              Normal
  05/13/2026 06 PM PDT            8.72           1463         +              Normal
  05/13/2026 07 PM PDT            8.72           1463         0              Normal
  05/13/2026 08 PM PDT            8.76           1488         +              Normal
  05/13/2026 09 PM PDT            8.78           1501         +              Normal
  05/13/2026 10 PM PDT            8.78           1501         0              Normal
  05/13/2026 11 PM PDT            8.78           1501         0              Normal
  05/14/2026 12 AM PDT            8.79           1508         +              Normal
  05/14/2026 01 AM PDT            8.79           1508         0              Normal
  05/14/2026 02 AM PDT            8.79           1508         0              Normal
  05/14/2026 03 AM PDT            8.79           1508         0              Normal
  05/14/2026 04 AM PDT            8.80           1514         +              Normal
  05/14/2026 05 AM PDT            8.81           1520         +              Normal
  05/14/2026 06 AM PDT            8.82           1527         +              Normal
  05/14/2026 07 AM PDT            8.83           1533         +              Normal
  05/14/2026 08 AM PDT            8.85           1546         +              Normal
  05/14/2026 09 AM PDT            8.85           1546         0              Normal
  05/14/2026 10 AM PDT            8.84           1540         -              Normal
  05/14/2026 11 AM PDT            8.85           1546         +              Normal
  05/14/2026 12 PM PDT            8.86           1553         +              Normal
  05/14/2026 01 PM PDT            8.89           1573         +              Normal
  05/14/2026 02 PM PDT            8.90           1579         +              Normal
  05/14/2026 03 PM PDT            8.93           1599         +              Normal
  05/14/2026 04 PM PDT            8.95           1612         +              Normal
  05/14/2026 05 PM PDT            8.96           1619         +              Normal
  05/14/2026 06 PM PDT            8.99           1639         +              Normal
  05/14/2026 07 PM PDT            9.02           1659         +              Normal
  05/14/2026 08 PM PDT            9.05           1679         +              Normal
  05/14/2026 09 PM PDT            9.07           1693         +              Normal
  05/14/2026 10 PM PDT            9.09           1706         +              Normal
  05/14/2026 11 PM PDT            9.10           1713         +              Normal
  05/15/2026 12 AM PDT            9.11           1720         +              Normal
  05/15/2026 01 AM PDT            9.13           1734         +              Normal
  05/15/2026 02 AM PDT            9.14           1740         +              Normal
  05/15/2026 03 AM PDT            9.17           1761         +              Normal
  05/15/2026 04 AM PDT            9.19           1775         +              Normal
  05/15/2026 05 AM PDT            9.20           1782         +              Normal
  05/15/2026 06 AM PDT            9.22           1796         +              Normal
  05/15/2026 07 AM PDT            9.24           1810         +              Normal
  05/15/2026 08 AM PDT            9.25           1817         +              Normal
  05/15/2026 09 AM PDT            9.24           1810         -              Normal
  05/15/2026 10 AM PDT            9.25           1817         +              Normal
  05/15/2026 11 AM PDT            9.27           1831         +              Normal
  05/15/2026 12 PM PDT            9.28           1838         +              Normal
  05/15/2026 01 PM PDT            9.30           1852         +              Normal
  05/15/2026 02 PM PDT            9.30           1852         0              Normal
  05/15/2026 03 PM PDT            9.31           1859         +              Normal
  05/15/2026 04 PM PDT            9.32           1866         +              Normal
  05/15/2026 05 PM PDT            9.34           1880         +              Normal
  05/15/2026 06 PM PDT            9.38           1908         +              Normal
  05/15/2026 07 PM PDT            9.43           1944         +              Normal
  05/15/2026 08 PM PDT            9.45           1959         +              Normal
  05/15/2026 09 PM PDT            9.46           1966         +              Normal
  05/15/2026 10 PM PDT            9.48           1980         +              Normal
  05/15/2026 11 PM PDT            9.48           1980         0              Normal
  05/16/2026 12 AM PDT            9.49           1988         +              Normal
  05/16/2026 01 AM PDT            9.50           1995         +              Normal
  05/16/2026 02 AM PDT            9.52           2009         +              Normal
  05/16/2026 03 AM PDT            9.51           2002         -              Normal
  05/16/2026 04 AM PDT            9.56           2039         +              Normal
  05/16/2026 05 AM PDT            9.59           2061         +              Normal
  05/16/2026 06 AM PDT            9.60           2068         +              Normal
  05/16/2026 07 AM PDT            9.62           2083         +              Normal
  05/16/2026 08 AM PDT            9.62           2083         0              Normal
  05/16/2026 09 AM PDT            9.64           2098         +              Normal
  05/16/2026 10 AM PDT            9.67           2120         +              Normal
  05/16/2026 11 AM PDT            9.68           2128         +              Normal
  05/16/2026 12 PM PDT            9.72           2158         +              Normal
  05/16/2026 01 PM PDT            9.72           2158         0              Normal
  05/16/2026 02 PM PDT            9.75           2180         +              Normal
  05/16/2026 03 PM PDT            9.75           2180         0              Normal
  05/16/2026 04 PM PDT            9.77           2195         +              Normal
  05/16/2026 05 PM PDT            9.78           2203         +              Normal
  05/16/2026 06 PM PDT            9.79           2210         +              Normal
  05/16/2026 07 PM PDT            9.81           2226         +              Normal
  05/16/2026 08 PM PDT            9.85           2256         +              Normal
  05/16/2026 09 PM PDT            9.87           2272         +              Normal
  05/16/2026 10 PM PDT            9.89           2287         +              Normal
  05/16/2026 11 PM PDT            9.90           2295         +              Normal
  05/17/2026 12 AM PDT            9.91           2302         +              Normal
  05/17/2026 01 AM PDT            9.92           2310         +              Normal
  05/17/2026 02 AM PDT            9.93           2318         +              Normal
  05/17/2026 03 AM PDT            9.93           2318         0              Normal
  05/17/2026 04 AM PDT            9.96           2341         +              Normal
  05/17/2026 05 AM PDT            9.97           2349         +              Normal
  05/17/2026 06 AM PDT            9.98           2357         +              Normal
  05/17/2026 07 AM PDT            9.98           2357         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/17/2026 08 AM PDT            9.99           2365                        Normal
  05/17/2026 09 AM PDT           10.00           2373         +              Normal
  05/17/2026 10 AM PDT           10.01           2380         +              Normal
  05/17/2026 11 AM PDT           10.01           2380         0              Normal
  05/17/2026 12 PM PDT           10.02           2388         +              Normal
  05/17/2026 01 PM PDT           10.03           2396         +              Normal
  05/17/2026 02 PM PDT           10.03           2396         0              Normal
  05/17/2026 03 PM PDT           10.04           2404         +              Normal
  05/17/2026 04 PM PDT           10.04           2404         0              Normal
  05/17/2026 05 PM PDT           10.05           2412         +              Normal
  05/17/2026 06 PM PDT           10.06           2420         +              Normal
  05/17/2026 07 PM PDT           10.06           2420         0              Normal
  05/17/2026 08 PM PDT           10.07           2428         +              Normal
  05/17/2026 09 PM PDT           10.07           2428         0              Normal
  05/17/2026 10 PM PDT           10.07           2428         0              Normal
  05/17/2026 11 PM PDT           10.08           2436         +              Normal
  05/18/2026 12 AM PDT           10.08           2436         0              Normal
  05/18/2026 01 AM PDT           10.09           2443         +              Normal
  05/18/2026 02 AM PDT           10.09           2443         0              Normal
  05/18/2026 03 AM PDT           10.10           2451         +              Normal
  05/18/2026 04 AM PDT           10.10           2451         0              Normal
  05/18/2026 05 AM PDT           10.10           2451         0              Normal
  05/18/2026 06 AM PDT           10.11           2459         +              Normal
  05/18/2026 07 AM PDT           10.11           2459         0              Normal
  05/18/2026 08 AM PDT           10.12           2467         +              Normal
  05/18/2026 09 AM PDT           10.12           2467         0              Normal
  05/18/2026 10 AM PDT           10.12           2467         0              Normal
  05/18/2026 11 AM PDT           10.12           2467         0              Normal
  05/18/2026 12 PM PDT           10.13           2475         +              Normal
  05/18/2026 01 PM PDT           10.13           2475         0              Normal
  05/18/2026 02 PM PDT           10.13           2475         0              Normal
  05/18/2026 03 PM PDT           10.13           2475         0              Normal
  05/18/2026 04 PM PDT           10.14           2483         +              Normal
  05/18/2026 05 PM PDT           10.14           2483         0              Normal
  05/18/2026 06 PM PDT           10.14           2483         0              Normal
  05/18/2026 07 PM PDT           10.14           2483         0              Normal
  05/18/2026 08 PM PDT           10.15           2491         +              Normal
  05/18/2026 09 PM PDT           10.15           2491         0              Normal
  05/18/2026 10 PM PDT           10.15           2491         0              Normal
  05/18/2026 11 PM PDT           10.15           2491         0              Normal
  05/19/2026 12 AM PDT           10.15           2491         0              Normal
  05/19/2026 01 AM PDT           10.16           2499         +              Normal
  05/19/2026 02 AM PDT           10.16           2499         0              Normal
  05/19/2026 03 AM PDT           10.16           2499         0              Normal
  05/19/2026 04 AM PDT           10.16           2499         0              Normal
  05/19/2026 05 AM PDT           10.16           2499         0              Normal
  05/19/2026 06 AM PDT           10.16           2499         0              Normal
  05/19/2026 07 AM PDT           10.17           2507         +              Normal
  05/19/2026 08 AM PDT           10.17           2507         0              Normal
  05/19/2026 09 AM PDT           10.17           2507         0              Normal
  05/19/2026 10 AM PDT           10.17           2507         0              Normal
  05/19/2026 11 AM PDT           10.17           2507         0              Normal
  05/19/2026 12 PM PDT           10.17           2507         0              Normal
  05/19/2026 01 PM PDT           10.18           2515         +              Normal
  05/19/2026 02 PM PDT           10.18           2515         0              Normal
  05/19/2026 03 PM PDT           10.18           2515         0              Normal
  05/19/2026 04 PM PDT           10.18           2515         0              Normal
  05/19/2026 05 PM PDT           10.18           2515         0              Normal
  05/19/2026 06 PM PDT           10.18           2515         0              Normal
  05/19/2026 07 PM PDT           10.18           2515         0              Normal
  05/19/2026 08 PM PDT           10.18           2515         0              Normal
  05/19/2026 09 PM PDT           10.18           2515         0              Normal
  05/19/2026 10 PM PDT           10.18           2515         0              Normal
  05/19/2026 11 PM PDT           10.18           2515         0              Normal
  05/20/2026 12 AM PDT           10.19           2523         +              Normal
  05/20/2026 01 AM PDT           10.19           2523         0              Normal
  05/20/2026 02 AM PDT           10.19           2523         0              Normal
  05/20/2026 03 AM PDT           10.19           2523         0              Normal
  05/20/2026 04 AM PDT           10.19           2523         0              Normal
  05/20/2026 05 AM PDT           10.19           2523         0              Normal
  05/20/2026 06 AM PDT           10.19           2523         0              Normal
  05/20/2026 07 AM PDT           10.19           2523         0              Normal
  05/20/2026 08 AM PDT           10.19           2523         0              Normal
  05/20/2026 09 AM PDT           10.19           2523         0              Normal
  05/20/2026 10 AM PDT           10.19           2523         0              Normal
  05/20/2026 11 AM PDT           10.19           2523         0              Normal
  05/20/2026 12 PM PDT           10.19           2523         0              Normal
  05/20/2026 01 PM PDT           10.19           2523         0              Normal
  05/20/2026 02 PM PDT           10.19           2523         0              Normal
  05/20/2026 03 PM PDT           10.19           2523         0              Normal
  05/20/2026 04 PM PDT           10.20           2531         +              Normal
  05/20/2026 05 PM PDT           10.20           2531         0              Normal
  05/20/2026 06 PM PDT           10.20           2531         0              Normal
  05/20/2026 07 PM PDT           10.20           2531         0              Normal
  05/20/2026 08 PM PDT           10.20           2531         0              Normal
  05/20/2026 09 PM PDT           10.20           2531         0              Normal
  05/20/2026 10 PM PDT           10.20           2531         0              Normal
  05/20/2026 11 PM PDT           10.20           2531         0              Normal
  05/21/2026 12 AM PDT           10.20           2531         0              Normal
  05/21/2026 01 AM PDT           10.20           2531         0              Normal
  05/21/2026 02 AM PDT           10.20           2531         0              Normal
  05/21/2026 03 AM PDT           10.20           2531         0              Normal
  05/21/2026 04 AM PDT           10.20           2531         0              Normal
  05/21/2026 05 AM PDT           10.20           2531         0              Normal
  05/21/2026 06 AM PDT           10.20           2531         0              Normal
  05/21/2026 07 AM PDT           10.20           2531         0              Normal
  05/21/2026 08 AM PDT           10.20           2531         0              Normal
  05/21/2026 09 AM PDT           10.20           2531         0              Normal
  05/21/2026 10 AM PDT           10.20           2531         0              Normal
  05/21/2026 11 AM PDT           10.20           2531         0              Normal
  05/21/2026 12 PM PDT           10.20           2531         0              Normal
  05/21/2026 01 PM PDT           10.20           2531         0              Normal
  05/21/2026 02 PM PDT           10.20           2531         0              Normal
  05/21/2026 03 PM PDT           10.20           2531         0              Normal
  05/21/2026 04 PM PDT           10.20           2531         0              Normal
  05/21/2026 05 PM PDT           10.20           2531         0              Normal
  05/21/2026 06 PM PDT           10.20           2531         0              Normal
  05/21/2026 07 PM PDT           10.20           2531         0              Normal
  05/21/2026 08 PM PDT           10.20           2531         0              Normal
  05/21/2026 09 PM PDT           10.20           2531         0              Normal
  05/21/2026 10 PM PDT           10.20           2531         0              Normal
  05/21/2026 11 PM PDT           10.20           2531         0              Normal
  05/22/2026 12 AM PDT           10.20           2531         0              Normal
  05/22/2026 01 AM PDT           10.20           2531         0              Normal
  05/22/2026 02 AM PDT           10.20           2531         0              Normal
  05/22/2026 03 AM PDT           10.20           2531         0              Normal
  05/22/2026 04 AM PDT           10.20           2531         0              Normal
  05/22/2026 05 AM PDT           10.20           2531         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.