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: Oct 31 2026 at 8:37 AM PDTNext Issuance: Nov 01 2026 at 9:00 AM PST
Action: 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:  10/31/2026 at 08:37 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  10/26/2026 at 09:00 AM PDT
# Maximum Observed Stage:                       10.21 Feet
# Maximum Observed Flow:                        2539 cfs
#
# Earliest Date & Time of Maximum Forecast:     10/31/2026 at 01:00 PM PDT
# Maximum Forecast Stage:                       9.64 Feet
# Maximum Forecast Flow:                        2098 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  10/26/2026 08 AM PDT           10.21           2539                        Normal
  10/26/2026 09 AM PDT           10.21           2539         0              Normal
  10/26/2026 10 AM PDT           10.20           2531         -              Normal
  10/26/2026 11 AM PDT           10.20           2531         0              Normal
  10/26/2026 12 PM PDT           10.20           2531         0              Normal
  10/26/2026 01 PM PDT           10.18           2515         -              Normal
  10/26/2026 02 PM PDT           10.16           2499         -              Normal
  10/26/2026 03 PM PDT           10.17           2507         +              Normal
  10/26/2026 04 PM PDT           10.16           2499         -              Normal
  10/26/2026 05 PM PDT           10.15           2491         -              Normal
  10/26/2026 06 PM PDT           10.15           2491         0              Normal
  10/26/2026 07 PM PDT           10.14           2483         -              Normal
  10/26/2026 08 PM PDT           10.11           2459         -              Normal
  10/26/2026 09 PM PDT           10.11           2459         0              Normal
  10/26/2026 10 PM PDT           10.11           2459         0              Normal
  10/26/2026 11 PM PDT           10.11           2459         0              Normal
  10/27/2026 12 AM PDT           10.10           2451         -              Normal
  10/27/2026 01 AM PDT           10.09           2443         -              Normal
  10/27/2026 02 AM PDT           10.09           2443         0              Normal
  10/27/2026 03 AM PDT           10.08           2436         -              Normal
  10/27/2026 04 AM PDT           10.07           2428         -              Normal
  10/27/2026 05 AM PDT           10.06           2420         -              Normal
  10/27/2026 06 AM PDT           10.05           2412         -              Normal
  10/27/2026 07 AM PDT           10.04           2404         -              Normal
  10/27/2026 08 AM PDT           10.02           2388         -              Normal
  10/27/2026 09 AM PDT           10.01           2380         -              Normal
  10/27/2026 10 AM PDT            9.99           2365         -              Normal
  10/27/2026 11 AM PDT            9.97           2349         -              Normal
  10/27/2026 12 PM PDT            9.94           2326         -              Normal
  10/27/2026 01 PM PDT            9.91           2302         -              Normal
  10/27/2026 02 PM PDT            9.89           2287         -              Normal
  10/27/2026 03 PM PDT            9.86           2264         -              Normal
  10/27/2026 04 PM PDT            9.82           2233         -              Normal
  10/27/2026 05 PM PDT            9.78           2203         -              Normal
  10/27/2026 06 PM PDT            9.76           2188         -              Normal
  10/27/2026 07 PM PDT            9.73           2165         -              Normal
  10/27/2026 08 PM PDT            9.70           2143         -              Normal
  10/27/2026 09 PM PDT            9.66           2113         -              Normal
  10/27/2026 10 PM PDT            9.63           2090         -              Normal
  10/27/2026 11 PM PDT            9.61           2076         -              Normal
  10/28/2026 12 AM PDT            9.58           2053         -              Normal
  10/28/2026 01 AM PDT            9.55           2031         -              Normal
  10/28/2026 02 AM PDT            9.53           2017         -              Normal
  10/28/2026 03 AM PDT            9.50           1995         -              Normal
  10/28/2026 04 AM PDT            9.47           1973         -              Normal
  10/28/2026 05 AM PDT            9.44           1951         -              Normal
  10/28/2026 06 AM PDT            9.41           1930         -              Normal
  10/28/2026 07 AM PDT            9.39           1916         -              Normal
  10/28/2026 08 AM PDT            9.36           1894         -              Normal
  10/28/2026 09 AM PDT            9.32           1866         -              Normal
  10/28/2026 10 AM PDT            9.28           1838         -              Normal
  10/28/2026 11 AM PDT            9.28           1838         0              Normal
  10/28/2026 12 PM PDT            9.24           1810         -              Normal
  10/28/2026 01 PM PDT            9.23           1803         -              Normal
  10/28/2026 02 PM PDT            9.20           1782         -              Normal
  10/28/2026 03 PM PDT            9.17           1761         -              Normal
  10/28/2026 04 PM PDT            9.16           1754         -              Normal
  10/28/2026 05 PM PDT            9.15           1747         -              Normal
  10/28/2026 06 PM PDT            9.12           1727         -              Normal
  10/28/2026 07 PM PDT            9.09           1706         -              Normal
  10/28/2026 08 PM PDT            9.07           1693         -              Normal
  10/28/2026 09 PM PDT            9.04           1672         -              Normal
  10/28/2026 10 PM PDT            9.02           1659         -              Normal
  10/28/2026 11 PM PDT            9.00           1646         -              Normal
  10/29/2026 12 AM PDT            8.98           1632         -              Normal
  10/29/2026 01 AM PDT            8.96           1619         -              Normal
  10/29/2026 02 AM PDT            8.94           1606         -              Normal
  10/29/2026 03 AM PDT            8.93           1599         -              Normal
  10/29/2026 04 AM PDT            8.91           1586         -              Normal
  10/29/2026 05 AM PDT            8.89           1573         -              Normal
  10/29/2026 06 AM PDT            8.88           1566         -              Normal
  10/29/2026 07 AM PDT            8.87           1560         -              Normal
  10/29/2026 08 AM PDT            8.86           1553         -              Normal
  10/29/2026 09 AM PDT            8.85           1546         -              Normal
  10/29/2026 10 AM PDT            8.84           1540         -              Normal
  10/29/2026 11 AM PDT            8.83           1533         -              Normal
  10/29/2026 12 PM PDT            8.83           1533         0              Normal
  10/29/2026 01 PM PDT            8.82           1527         -              Normal
  10/29/2026 02 PM PDT            8.82           1527         0              Normal
  10/29/2026 03 PM PDT            8.83           1533         +              Normal
  10/29/2026 04 PM PDT            8.83           1533         0              Normal
  10/29/2026 05 PM PDT            8.84           1540         +              Normal
  10/29/2026 06 PM PDT            8.84           1540         0              Normal
  10/29/2026 07 PM PDT            8.85           1546         +              Normal
  10/29/2026 08 PM PDT            8.85           1546         0              Normal
  10/29/2026 09 PM PDT            8.86           1553         +              Normal
  10/29/2026 10 PM PDT            8.87           1560         +              Normal
  10/29/2026 11 PM PDT            8.88           1566         +              Normal
  10/30/2026 12 AM PDT            8.90           1579         +              Normal
  10/30/2026 01 AM PDT            8.91           1586         +              Normal
  10/30/2026 02 AM PDT            8.93           1599         +              Normal
  10/30/2026 03 AM PDT            8.95           1612         +              Normal
  10/30/2026 04 AM PDT            8.95           1612         0              Normal
  10/30/2026 05 AM PDT            8.96           1619         +              Normal
  10/30/2026 06 AM PDT            8.99           1639         +              Normal
  10/30/2026 07 AM PDT            9.01           1652         +              Normal
  10/30/2026 08 AM PDT            9.02           1659         +              Normal
  10/30/2026 09 AM PDT            9.05           1679         +              Normal
  10/30/2026 10 AM PDT            9.06           1686         +              Normal
  10/30/2026 11 AM PDT            9.09           1706         +              Normal
  10/30/2026 12 PM PDT            9.12           1727         +              Normal
  10/30/2026 01 PM PDT            9.15           1747         +              Normal
  10/30/2026 02 PM PDT            9.19           1775         +              Normal
  10/30/2026 03 PM PDT            9.23           1803         +              Normal
  10/30/2026 04 PM PDT            9.25           1817         +              Normal
  10/30/2026 05 PM PDT            9.28           1838         +              Normal
  10/30/2026 06 PM PDT            9.31           1859         +              Normal
  10/30/2026 07 PM PDT            9.33           1873         +              Normal
  10/30/2026 08 PM PDT            9.35           1887         +              Normal
  10/30/2026 09 PM PDT            9.38           1908         +              Normal
  10/30/2026 10 PM PDT            9.41           1930         +              Normal
  10/30/2026 11 PM PDT            9.44           1951         +              Normal
  10/31/2026 12 AM PDT            9.47           1973         +              Normal
  10/31/2026 01 AM PDT            9.49           1988         +              Normal
  10/31/2026 02 AM PDT            9.53           2017         +              Normal
  10/31/2026 03 AM PDT            9.55           2031         +              Normal
  10/31/2026 04 AM PDT            9.56           2039         +              Normal
  10/31/2026 05 AM PDT            9.57           2046         +              Normal
  10/31/2026 06 AM PDT            9.59           2061         +              Normal
  10/31/2026 07 AM PDT            9.60           2068         +              Normal
  10/31/2026 08 AM PDT            9.61           2076         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  10/31/2026 09 AM PDT            9.62           2083                        Normal
  10/31/2026 10 AM PDT            9.62           2083         0              Normal
  10/31/2026 11 AM PDT            9.63           2090         +              Normal
  10/31/2026 12 PM PDT            9.63           2090         0              Normal
  10/31/2026 01 PM PDT            9.64           2098         +              Normal
  10/31/2026 02 PM PDT            9.64           2098         0              Normal
  10/31/2026 03 PM PDT            9.64           2098         0              Normal
  10/31/2026 04 PM PDT            9.64           2098         0              Normal
  10/31/2026 05 PM PDT            9.64           2098         0              Normal
  10/31/2026 06 PM PDT            9.63           2090         -              Normal
  10/31/2026 07 PM PDT            9.63           2090         0              Normal
  10/31/2026 08 PM PDT            9.63           2090         0              Normal
  10/31/2026 09 PM PDT            9.63           2090         0              Normal
  10/31/2026 10 PM PDT            9.62           2083         -              Normal
  10/31/2026 11 PM PDT            9.62           2083         0              Normal
  11/01/2026 12 AM PDT            9.61           2076         -              Normal
  11/01/2026 01 AM PDT            9.61           2076         0              Normal
  11/01/2026 01 AM PST            9.60           2068         -              Normal
  11/01/2026 02 AM PST            9.59           2061         -              Normal
  11/01/2026 03 AM PST            9.58           2053         -              Normal
  11/01/2026 04 AM PST            9.57           2046         -              Normal
  11/01/2026 05 AM PST            9.57           2046         0              Normal
  11/01/2026 06 AM PST            9.56           2039         -              Normal
  11/01/2026 07 AM PST            9.55           2031         -              Normal
  11/01/2026 08 AM PST            9.54           2024         -              Normal
  11/01/2026 09 AM PST            9.53           2017         -              Normal
  11/01/2026 10 AM PST            9.52           2009         -              Normal
  11/01/2026 11 AM PST            9.51           2002         -              Normal
  11/01/2026 12 PM PST            9.50           1995         -              Normal
  11/01/2026 01 PM PST            9.49           1988         -              Normal
  11/01/2026 02 PM PST            9.48           1980         -              Normal
  11/01/2026 03 PM PST            9.47           1973         -              Normal
  11/01/2026 04 PM PST            9.46           1966         -              Normal
  11/01/2026 05 PM PST            9.45           1959         -              Normal
  11/01/2026 06 PM PST            9.44           1951         -              Normal
  11/01/2026 07 PM PST            9.43           1944         -              Normal
  11/01/2026 08 PM PST            9.42           1937         -              Normal
  11/01/2026 09 PM PST            9.41           1930         -              Normal
  11/01/2026 10 PM PST            9.41           1930         0              Normal
  11/01/2026 11 PM PST            9.40           1923         -              Normal
  11/02/2026 12 AM PST            9.39           1916         -              Normal
  11/02/2026 01 AM PST            9.38           1908         -              Normal
  11/02/2026 02 AM PST            9.36           1894         -              Normal
  11/02/2026 03 AM PST            9.35           1887         -              Normal
  11/02/2026 04 AM PST            9.34           1880         -              Normal
  11/02/2026 05 AM PST            9.33           1873         -              Normal
  11/02/2026 06 AM PST            9.32           1866         -              Normal
  11/02/2026 07 AM PST            9.30           1852         -              Normal
  11/02/2026 08 AM PST            9.29           1845         -              Normal
  11/02/2026 09 AM PST            9.28           1838         -              Normal
  11/02/2026 10 AM PST            9.27           1831         -              Normal
  11/02/2026 11 AM PST            9.26           1824         -              Normal
  11/02/2026 12 PM PST            9.24           1810         -              Normal
  11/02/2026 01 PM PST            9.23           1803         -              Normal
  11/02/2026 02 PM PST            9.22           1796         -              Normal
  11/02/2026 03 PM PST            9.21           1789         -              Normal
  11/02/2026 04 PM PST            9.20           1782         -              Normal
  11/02/2026 05 PM PST            9.19           1775         -              Normal
  11/02/2026 06 PM PST            9.18           1768         -              Normal
  11/02/2026 07 PM PST            9.17           1761         -              Normal
  11/02/2026 08 PM PST            9.16           1754         -              Normal
  11/02/2026 09 PM PST            9.15           1747         -              Normal
  11/02/2026 10 PM PST            9.13           1734         -              Normal
  11/02/2026 11 PM PST            9.12           1727         -              Normal
  11/03/2026 12 AM PST            9.11           1720         -              Normal
  11/03/2026 01 AM PST            9.10           1713         -              Normal
  11/03/2026 02 AM PST            9.08           1700         -              Normal
  11/03/2026 03 AM PST            9.06           1686         -              Normal
  11/03/2026 04 AM PST            9.05           1679         -              Normal
  11/03/2026 05 AM PST            9.03           1666         -              Normal
  11/03/2026 06 AM PST            9.01           1652         -              Normal
  11/03/2026 07 AM PST            8.99           1639         -              Normal
  11/03/2026 08 AM PST            8.97           1626         -              Normal
  11/03/2026 09 AM PST            8.95           1612         -              Normal
  11/03/2026 10 AM PST            8.92           1592         -              Normal
  11/03/2026 11 AM PST            8.90           1579         -              Normal
  11/03/2026 12 PM PST            8.88           1566         -              Normal
  11/03/2026 01 PM PST            8.86           1553         -              Normal
  11/03/2026 02 PM PST            8.83           1533         -              Normal
  11/03/2026 03 PM PST            8.81           1520         -              Normal
  11/03/2026 04 PM PST            8.79           1508         -              Normal
  11/03/2026 05 PM PST            8.77           1495         -              Normal
  11/03/2026 06 PM PST            8.75           1482         -              Normal
  11/03/2026 07 PM PST            8.73           1469         -              Normal
  11/03/2026 08 PM PST            8.71           1456         -              Normal
  11/03/2026 09 PM PST            8.69           1444         -              Normal
  11/03/2026 10 PM PST            8.66           1425         -              Normal
  11/03/2026 11 PM PST            8.64           1412         -              Normal
  11/04/2026 12 AM PST            8.62           1400         -              Normal
  11/04/2026 01 AM PST            8.60           1387         -              Normal
  11/04/2026 02 AM PST            8.58           1375         -              Normal
  11/04/2026 03 AM PST            8.56           1362         -              Normal
  11/04/2026 04 AM PST            8.54           1350         -              Normal
  11/04/2026 05 AM PST            8.52           1338         -              Normal
  11/04/2026 06 AM PST            8.50           1325         -              Normal
  11/04/2026 07 AM PST            8.48           1313         -              Normal
  11/04/2026 08 AM PST            8.46           1301         -              Normal
  11/04/2026 09 AM PST            8.44           1289         -              Normal
  11/04/2026 10 AM PST            8.42           1277         -              Normal
  11/04/2026 11 AM PST            8.40           1265         -              Normal
  11/04/2026 12 PM PST            8.38           1253         -              Normal
  11/04/2026 01 PM PST            8.37           1247         -              Normal
  11/04/2026 02 PM PST            8.35           1235         -              Normal
  11/04/2026 03 PM PST            8.33           1223         -              Normal
  11/04/2026 04 PM PST            8.32           1217         -              Normal
  11/04/2026 05 PM PST            8.30           1205         -              Normal
  11/04/2026 06 PM PST            8.28           1194         -              Normal
  11/04/2026 07 PM PST            8.27           1188         -              Normal
  11/04/2026 08 PM PST            8.25           1176         -              Normal
  11/04/2026 09 PM PST            8.24           1170         -              Normal
  11/04/2026 10 PM PST            8.22           1159         -              Normal
  11/04/2026 11 PM PST            8.21           1153         -              Normal
  11/05/2026 12 AM PST            8.20           1147         -              Normal
  11/05/2026 01 AM PST            8.18           1136         -              Normal
  11/05/2026 02 AM PST            8.17           1130         -              Normal
  11/05/2026 03 AM PST            8.16           1124         -              Normal
  11/05/2026 04 AM PST            8.14           1113         -              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.