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 09 2026 at 7:47 AM PDTNext Issuance: May 10 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:  05/09/2026 at 07:47 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/04/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       9.77 Feet
# Maximum Observed Flow:                        2195 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/14/2026 at 05:00 AM PDT
# Maximum Forecast Stage:                       9.62 Feet
# Maximum Forecast Flow:                        2083 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/04/2026 07 AM PDT            9.77           2195                        Normal
  05/04/2026 08 AM PDT            9.77           2195         0              Normal
  05/04/2026 09 AM PDT            9.75           2180         -              Normal
  05/04/2026 10 AM PDT            9.72           2158         -              Normal
  05/04/2026 11 AM PDT            9.69           2135         -              Normal
  05/04/2026 12 PM PDT            9.66           2113         -              Normal
  05/04/2026 01 PM PDT            9.63           2090         -              Normal
  05/04/2026 02 PM PDT            9.61           2076         -              Normal
  05/04/2026 03 PM PDT            9.58           2053         -              Normal
  05/04/2026 04 PM PDT            9.55           2031         -              Normal
  05/04/2026 05 PM PDT            9.53           2017         -              Normal
  05/04/2026 06 PM PDT            9.52           2009         -              Normal
  05/04/2026 07 PM PDT            9.50           1995         -              Normal
  05/04/2026 08 PM PDT            9.49           1988         -              Normal
  05/04/2026 09 PM PDT            9.46           1966         -              Normal
  05/04/2026 10 PM PDT            9.44           1951         -              Normal
  05/04/2026 11 PM PDT            9.45           1959         +              Normal
  05/05/2026 12 AM PDT            9.43           1944         -              Normal
  05/05/2026 01 AM PDT            9.42           1937         -              Normal
  05/05/2026 02 AM PDT            9.43           1944         +              Normal
  05/05/2026 03 AM PDT            9.42           1937         -              Normal
  05/05/2026 04 AM PDT            9.41           1930         -              Normal
  05/05/2026 05 AM PDT            9.40           1923         -              Normal
  05/05/2026 06 AM PDT            9.40           1923         0              Normal
  05/05/2026 07 AM PDT            9.39           1916         -              Normal
  05/05/2026 08 AM PDT            9.37           1901         -              Normal
  05/05/2026 09 AM PDT            9.35           1887         -              Normal
  05/05/2026 10 AM PDT            9.32           1866         -              Normal
  05/05/2026 11 AM PDT            9.30           1852         -              Normal
  05/05/2026 12 PM PDT            9.29           1845         -              Normal
  05/05/2026 01 PM PDT            9.27           1831         -              Normal
  05/05/2026 02 PM PDT            9.25           1817         -              Normal
  05/05/2026 03 PM PDT            9.24           1810         -              Normal
  05/05/2026 04 PM PDT            9.22           1796         -              Normal
  05/05/2026 05 PM PDT            9.22           1796         0              Normal
  05/05/2026 06 PM PDT            9.20           1782         -              Normal
  05/05/2026 07 PM PDT            9.20           1782         0              Normal
  05/05/2026 08 PM PDT            9.19           1775         -              Normal
  05/05/2026 09 PM PDT            9.19           1775         0              Normal
  05/05/2026 10 PM PDT            9.17           1761         -              Normal
  05/05/2026 11 PM PDT            9.15           1747         -              Normal
  05/06/2026 12 AM PDT            9.14           1740         -              Normal
  05/06/2026 01 AM PDT            9.13           1734         -              Normal
  05/06/2026 02 AM PDT            9.14           1740         +              Normal
  05/06/2026 03 AM PDT            9.14           1740         0              Normal
  05/06/2026 04 AM PDT            9.13           1734         -              Normal
  05/06/2026 05 AM PDT            9.13           1734         0              Normal
  05/06/2026 06 AM PDT            9.12           1727         -              Normal
  05/06/2026 07 AM PDT            9.11           1720         -              Normal
  05/06/2026 08 AM PDT            9.10           1713         -              Normal
  05/06/2026 09 AM PDT            9.08           1700         -              Normal
  05/06/2026 10 AM PDT            9.07           1693         -              Normal
  05/06/2026 11 AM PDT            9.05           1679         -              Normal
  05/06/2026 12 PM PDT            9.04           1672         -              Normal
  05/06/2026 01 PM PDT            9.03           1666         -              Normal
  05/06/2026 02 PM PDT            8.99           1639         -              Normal
  05/06/2026 03 PM PDT            8.99           1639         0              Normal
  05/06/2026 04 PM PDT            8.97           1626         -              Normal
  05/06/2026 05 PM PDT            8.96           1619         -              Normal
  05/06/2026 06 PM PDT            8.94           1606         -              Normal
  05/06/2026 07 PM PDT            8.93           1599         -              Normal
  05/06/2026 08 PM PDT            8.95           1612         +              Normal
  05/06/2026 09 PM PDT            8.93           1599         -              Normal
  05/06/2026 10 PM PDT            8.92           1592         -              Normal
  05/06/2026 11 PM PDT            8.90           1579         -              Normal
  05/07/2026 12 AM PDT            8.88           1566         -              Normal
  05/07/2026 01 AM PDT            8.87           1560         -              Normal
  05/07/2026 02 AM PDT            8.85           1546         -              Normal
  05/07/2026 03 AM PDT            8.84           1540         -              Normal
  05/07/2026 04 AM PDT            8.82           1527         -              Normal
  05/07/2026 05 AM PDT            8.81           1520         -              Normal
  05/07/2026 06 AM PDT            8.80           1514         -              Normal
  05/07/2026 07 AM PDT            8.79           1508         -              Normal
  05/07/2026 08 AM PDT            8.76           1488         -              Normal
  05/07/2026 09 AM PDT            8.75           1482         -              Normal
  05/07/2026 10 AM PDT            8.74           1475         -              Normal
  05/07/2026 11 AM PDT            8.71           1456         -              Normal
  05/07/2026 12 PM PDT            8.74           1475         +              Normal
  05/07/2026 01 PM PDT            8.70           1450         -              Normal
  05/07/2026 02 PM PDT            8.69           1444         -              Normal
  05/07/2026 03 PM PDT            8.67           1431         -              Normal
  05/07/2026 04 PM PDT            8.66           1425         -              Normal
  05/07/2026 05 PM PDT            8.64           1412         -              Normal
  05/07/2026 06 PM PDT            8.64           1412         0              Normal
  05/07/2026 07 PM PDT            8.61           1393         -              Normal
  05/07/2026 08 PM PDT            8.61           1393         0              Normal
  05/07/2026 09 PM PDT            8.59           1381         -              Normal
  05/07/2026 10 PM PDT            8.57           1368         -              Normal
  05/07/2026 11 PM PDT            8.60           1387         +              Normal
  05/08/2026 12 AM PDT            8.59           1381         -              Normal
  05/08/2026 01 AM PDT            8.57           1368         -              Normal
  05/08/2026 02 AM PDT            8.57           1368         0              Normal
  05/08/2026 03 AM PDT            8.57           1368         0              Normal
  05/08/2026 04 AM PDT            8.58           1375         +              Normal
  05/08/2026 05 AM PDT            8.58           1375         0              Normal
  05/08/2026 06 AM PDT            8.58           1375         0              Normal
  05/08/2026 07 AM PDT            8.58           1375         0              Normal
  05/08/2026 08 AM PDT            8.58           1375         0              Normal
  05/08/2026 09 AM PDT            8.56           1362         -              Normal
  05/08/2026 10 AM PDT            8.56           1362         0              Normal
  05/08/2026 11 AM PDT            8.54           1350         -              Normal
  05/08/2026 12 PM PDT            8.54           1350         0              Normal
  05/08/2026 01 PM PDT            8.55           1356         +              Normal
  05/08/2026 02 PM PDT            8.54           1350         -              Normal
  05/08/2026 03 PM PDT            8.53           1344         -              Normal
  05/08/2026 04 PM PDT            8.51           1331         -              Normal
  05/08/2026 05 PM PDT            8.52           1338         +              Normal
  05/08/2026 06 PM PDT            8.49           1319         -              Normal
  05/08/2026 07 PM PDT            8.50           1325         +              Normal
  05/08/2026 08 PM PDT            8.52           1338         +              Normal
  05/08/2026 09 PM PDT            8.53           1344         +              Normal
  05/08/2026 10 PM PDT            8.52           1338         -              Normal
  05/08/2026 11 PM PDT            8.52           1338         0              Normal
  05/09/2026 12 AM PDT            8.52           1338         0              Normal
  05/09/2026 01 AM PDT            8.52           1338         0              Normal
  05/09/2026 02 AM PDT            8.52           1338         0              Normal
  05/09/2026 03 AM PDT            8.52           1338         0              Normal
  05/09/2026 04 AM PDT            8.53           1344         +              Normal
  05/09/2026 05 AM PDT            8.53           1344         0              Normal
  05/09/2026 06 AM PDT            8.53           1344         0              Normal
  05/09/2026 07 AM PDT            8.52           1338         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/09/2026 08 AM PDT            8.52           1338                        Normal
  05/09/2026 09 AM PDT            8.51           1331         -              Normal
  05/09/2026 10 AM PDT            8.51           1331         0              Normal
  05/09/2026 11 AM PDT            8.50           1325         -              Normal
  05/09/2026 12 PM PDT            8.50           1325         0              Normal
  05/09/2026 01 PM PDT            8.49           1319         -              Normal
  05/09/2026 02 PM PDT            8.49           1319         0              Normal
  05/09/2026 03 PM PDT            8.48           1313         -              Normal
  05/09/2026 04 PM PDT            8.48           1313         0              Normal
  05/09/2026 05 PM PDT            8.47           1307         -              Normal
  05/09/2026 06 PM PDT            8.47           1307         0              Normal
  05/09/2026 07 PM PDT            8.46           1301         -              Normal
  05/09/2026 08 PM PDT            8.46           1301         0              Normal
  05/09/2026 09 PM PDT            8.45           1295         -              Normal
  05/09/2026 10 PM PDT            8.45           1295         0              Normal
  05/09/2026 11 PM PDT            8.44           1289         -              Normal
  05/10/2026 12 AM PDT            8.44           1289         0              Normal
  05/10/2026 01 AM PDT            8.44           1289         0              Normal
  05/10/2026 02 AM PDT            8.43           1283         -              Normal
  05/10/2026 03 AM PDT            8.43           1283         0              Normal
  05/10/2026 04 AM PDT            8.42           1277         -              Normal
  05/10/2026 05 AM PDT            8.42           1277         0              Normal
  05/10/2026 06 AM PDT            8.41           1271         -              Normal
  05/10/2026 07 AM PDT            8.41           1271         0              Normal
  05/10/2026 08 AM PDT            8.40           1265         -              Normal
  05/10/2026 09 AM PDT            8.40           1265         0              Normal
  05/10/2026 10 AM PDT            8.40           1265         0              Normal
  05/10/2026 11 AM PDT            8.39           1259         -              Normal
  05/10/2026 12 PM PDT            8.39           1259         0              Normal
  05/10/2026 01 PM PDT            8.39           1259         0              Normal
  05/10/2026 02 PM PDT            8.38           1253         -              Normal
  05/10/2026 03 PM PDT            8.38           1253         0              Normal
  05/10/2026 04 PM PDT            8.38           1253         0              Normal
  05/10/2026 05 PM PDT            8.37           1247         -              Normal
  05/10/2026 06 PM PDT            8.37           1247         0              Normal
  05/10/2026 07 PM PDT            8.37           1247         0              Normal
  05/10/2026 08 PM PDT            8.36           1241         -              Normal
  05/10/2026 09 PM PDT            8.36           1241         0              Normal
  05/10/2026 10 PM PDT            8.36           1241         0              Normal
  05/10/2026 11 PM PDT            8.36           1241         0              Normal
  05/11/2026 12 AM PDT            8.35           1235         -              Normal
  05/11/2026 01 AM PDT            8.35           1235         0              Normal
  05/11/2026 02 AM PDT            8.35           1235         0              Normal
  05/11/2026 03 AM PDT            8.35           1235         0              Normal
  05/11/2026 04 AM PDT            8.34           1229         -              Normal
  05/11/2026 05 AM PDT            8.34           1229         0              Normal
  05/11/2026 06 AM PDT            8.34           1229         0              Normal
  05/11/2026 07 AM PDT            8.34           1229         0              Normal
  05/11/2026 08 AM PDT            8.34           1229         0              Normal
  05/11/2026 09 AM PDT            8.33           1223         -              Normal
  05/11/2026 10 AM PDT            8.33           1223         0              Normal
  05/11/2026 11 AM PDT            8.33           1223         0              Normal
  05/11/2026 12 PM PDT            8.33           1223         0              Normal
  05/11/2026 01 PM PDT            8.33           1223         0              Normal
  05/11/2026 02 PM PDT            8.32           1217         -              Normal
  05/11/2026 03 PM PDT            8.32           1217         0              Normal
  05/11/2026 04 PM PDT            8.32           1217         0              Normal
  05/11/2026 05 PM PDT            8.32           1217         0              Normal
  05/11/2026 06 PM PDT            8.32           1217         0              Normal
  05/11/2026 07 PM PDT            8.32           1217         0              Normal
  05/11/2026 08 PM PDT            8.32           1217         0              Normal
  05/11/2026 09 PM PDT            8.32           1217         0              Normal
  05/11/2026 10 PM PDT            8.32           1217         0              Normal
  05/11/2026 11 PM PDT            8.32           1217         0              Normal
  05/12/2026 12 AM PDT            8.32           1217         0              Normal
  05/12/2026 01 AM PDT            8.32           1217         0              Normal
  05/12/2026 02 AM PDT            8.33           1223         +              Normal
  05/12/2026 03 AM PDT            8.34           1229         +              Normal
  05/12/2026 04 AM PDT            8.35           1235         +              Normal
  05/12/2026 05 AM PDT            8.36           1241         +              Normal
  05/12/2026 06 AM PDT            8.37           1247         +              Normal
  05/12/2026 07 AM PDT            8.39           1259         +              Normal
  05/12/2026 08 AM PDT            8.41           1271         +              Normal
  05/12/2026 09 AM PDT            8.43           1283         +              Normal
  05/12/2026 10 AM PDT            8.46           1301         +              Normal
  05/12/2026 11 AM PDT            8.49           1319         +              Normal
  05/12/2026 12 PM PDT            8.52           1338         +              Normal
  05/12/2026 01 PM PDT            8.55           1356         +              Normal
  05/12/2026 02 PM PDT            8.59           1381         +              Normal
  05/12/2026 03 PM PDT            8.63           1406         +              Normal
  05/12/2026 04 PM PDT            8.67           1431         +              Normal
  05/12/2026 05 PM PDT            8.71           1456         +              Normal
  05/12/2026 06 PM PDT            8.75           1482         +              Normal
  05/12/2026 07 PM PDT            8.79           1508         +              Normal
  05/12/2026 08 PM PDT            8.83           1533         +              Normal
  05/12/2026 09 PM PDT            8.88           1566         +              Normal
  05/12/2026 10 PM PDT            8.91           1586         +              Normal
  05/12/2026 11 PM PDT            8.95           1612         +              Normal
  05/13/2026 12 AM PDT            8.99           1639         +              Normal
  05/13/2026 01 AM PDT            9.03           1666         +              Normal
  05/13/2026 02 AM PDT            9.06           1686         +              Normal
  05/13/2026 03 AM PDT            9.10           1713         +              Normal
  05/13/2026 04 AM PDT            9.13           1734         +              Normal
  05/13/2026 05 AM PDT            9.17           1761         +              Normal
  05/13/2026 06 AM PDT            9.20           1782         +              Normal
  05/13/2026 07 AM PDT            9.23           1803         +              Normal
  05/13/2026 08 AM PDT            9.26           1824         +              Normal
  05/13/2026 09 AM PDT            9.28           1838         +              Normal
  05/13/2026 10 AM PDT            9.31           1859         +              Normal
  05/13/2026 11 AM PDT            9.33           1873         +              Normal
  05/13/2026 12 PM PDT            9.36           1894         +              Normal
  05/13/2026 01 PM PDT            9.38           1908         +              Normal
  05/13/2026 02 PM PDT            9.40           1923         +              Normal
  05/13/2026 03 PM PDT            9.42           1937         +              Normal
  05/13/2026 04 PM PDT            9.44           1951         +              Normal
  05/13/2026 05 PM PDT            9.46           1966         +              Normal
  05/13/2026 06 PM PDT            9.48           1980         +              Normal
  05/13/2026 07 PM PDT            9.49           1988         +              Normal
  05/13/2026 08 PM PDT            9.51           2002         +              Normal
  05/13/2026 09 PM PDT            9.53           2017         +              Normal
  05/13/2026 10 PM PDT            9.54           2024         +              Normal
  05/13/2026 11 PM PDT            9.55           2031         +              Normal
  05/14/2026 12 AM PDT            9.56           2039         +              Normal
  05/14/2026 01 AM PDT            9.58           2053         +              Normal
  05/14/2026 02 AM PDT            9.59           2061         +              Normal
  05/14/2026 03 AM PDT            9.60           2068         +              Normal
  05/14/2026 04 AM PDT            9.61           2076         +              Normal
  05/14/2026 05 AM PDT            9.62           2083         +              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.