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 02 2026 at 8:36 AM PDTNext Issuance: May 03 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:  05/02/2026 at 08:36 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/27/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       10.96 Feet
# Maximum Observed Flow:                        3175 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/02/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       10.10 Feet
# Maximum Forecast Flow:                        2451 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/27/2026 08 AM PDT           10.96           3175                        Normal
  04/27/2026 09 AM PDT           10.95           3166         -              Normal
  04/27/2026 10 AM PDT           10.93           3148         -              Normal
  04/27/2026 11 AM PDT           10.91           3131         -              Normal
  04/27/2026 12 PM PDT           10.88           3104         -              Normal
  04/27/2026 01 PM PDT           10.85           3078         -              Normal
  04/27/2026 02 PM PDT           10.85           3078         0              Normal
  04/27/2026 03 PM PDT           10.80           3034         -              Normal
  04/27/2026 04 PM PDT           10.82           3052         +              Normal
  04/27/2026 05 PM PDT           10.79           3025         -              Normal
  04/27/2026 06 PM PDT           10.77           3008         -              Normal
  04/27/2026 07 PM PDT           10.77           3008         0              Normal
  04/27/2026 08 PM PDT           10.75           2991         -              Normal
  04/27/2026 09 PM PDT           10.74           2982         -              Normal
  04/27/2026 10 PM PDT           10.74           2982         0              Normal
  04/27/2026 11 PM PDT           10.73           2973         -              Normal
  04/28/2026 12 AM PDT           10.72           2965         -              Normal
  04/28/2026 01 AM PDT           10.71           2956         -              Normal
  04/28/2026 02 AM PDT           10.70           2948         -              Normal
  04/28/2026 03 AM PDT           10.69           2939         -              Normal
  04/28/2026 04 AM PDT           10.68           2930         -              Normal
  04/28/2026 05 AM PDT           10.67           2922         -              Normal
  04/28/2026 06 AM PDT           10.67           2922         0              Normal
  04/28/2026 07 AM PDT           10.66           2913         -              Normal
  04/28/2026 08 AM PDT           10.64           2896         -              Normal
  04/28/2026 09 AM PDT           10.65           2905         +              Normal
  04/28/2026 10 AM PDT           10.63           2888         -              Normal
  04/28/2026 11 AM PDT           10.62           2879         -              Normal
  04/28/2026 12 PM PDT           10.61           2871         -              Normal
  04/28/2026 01 PM PDT           10.60           2862         -              Normal
  04/28/2026 02 PM PDT           10.59           2854         -              Normal
  04/28/2026 03 PM PDT           10.58           2845         -              Normal
  04/28/2026 04 PM PDT           10.55           2820         -              Normal
  04/28/2026 05 PM PDT           10.55           2820         0              Normal
  04/28/2026 06 PM PDT           10.53           2803         -              Normal
  04/28/2026 07 PM PDT           10.54           2811         +              Normal
  04/28/2026 08 PM PDT           10.56           2828         +              Normal
  04/28/2026 09 PM PDT           10.56           2828         0              Normal
  04/28/2026 10 PM PDT           10.56           2828         0              Normal
  04/28/2026 11 PM PDT           10.56           2828         0              Normal
  04/29/2026 12 AM PDT           10.56           2828         0              Normal
  04/29/2026 01 AM PDT           10.56           2828         0              Normal
  04/29/2026 02 AM PDT           10.56           2828         0              Normal
  04/29/2026 03 AM PDT           10.57           2837         +              Normal
  04/29/2026 04 AM PDT           10.58           2845         +              Normal
  04/29/2026 05 AM PDT           10.58           2845         0              Normal
  04/29/2026 06 AM PDT           10.59           2854         +              Normal
  04/29/2026 07 AM PDT           10.61           2871         +              Normal
  04/29/2026 08 AM PDT           10.62           2879         +              Normal
  04/29/2026 09 AM PDT           10.63           2888         +              Normal
  04/29/2026 10 AM PDT           10.64           2896         +              Normal
  04/29/2026 11 AM PDT           10.68           2930         +              Normal
  04/29/2026 12 PM PDT           10.68           2930         0              Normal
  04/29/2026 01 PM PDT           10.70           2948         +              Normal
  04/29/2026 02 PM PDT           10.71           2956         +              Normal
  04/29/2026 03 PM PDT           10.72           2965         +              Normal
  04/29/2026 04 PM PDT           10.74           2982         +              Normal
  04/29/2026 05 PM PDT           10.73           2973         -              Normal
  04/29/2026 06 PM PDT           10.74           2982         +              Normal
  04/29/2026 07 PM PDT           10.73           2973         -              Normal
  04/29/2026 08 PM PDT           10.75           2991         +              Normal
  04/29/2026 09 PM PDT           10.76           2999         +              Normal
  04/29/2026 10 PM PDT           10.76           2999         0              Normal
  04/29/2026 11 PM PDT           10.77           3008         +              Normal
  04/30/2026 12 AM PDT           10.77           3008         0              Normal
  04/30/2026 01 AM PDT           10.78           3017         +              Normal
  04/30/2026 02 AM PDT           10.79           3025         +              Normal
  04/30/2026 03 AM PDT           10.79           3025         0              Normal
  04/30/2026 04 AM PDT           10.79           3025         0              Normal
  04/30/2026 05 AM PDT           10.78           3017         -              Normal
  04/30/2026 06 AM PDT           10.78           3017         0              Normal
  04/30/2026 07 AM PDT           10.78           3017         0              Normal
  04/30/2026 08 AM PDT           10.77           3008         -              Normal
  04/30/2026 09 AM PDT           10.76           2999         -              Normal
  04/30/2026 10 AM PDT           10.75           2991         -              Normal
  04/30/2026 11 AM PDT           10.75           2991         0              Normal
  04/30/2026 12 PM PDT           10.74           2982         -              Normal
  04/30/2026 01 PM PDT           10.72           2965         -              Normal
  04/30/2026 02 PM PDT           10.71           2956         -              Normal
  04/30/2026 03 PM PDT           10.68           2930         -              Normal
  04/30/2026 04 PM PDT           10.64           2896         -              Normal
  04/30/2026 05 PM PDT           10.62           2879         -              Normal
  04/30/2026 06 PM PDT           10.60           2862         -              Normal
  04/30/2026 07 PM PDT           10.60           2862         0              Normal
  04/30/2026 08 PM PDT           10.61           2871         +              Normal
  04/30/2026 09 PM PDT           10.59           2854         -              Normal
  04/30/2026 10 PM PDT           10.58           2845         -              Normal
  04/30/2026 11 PM PDT           10.56           2828         -              Normal
  05/01/2026 12 AM PDT           10.56           2828         0              Normal
  05/01/2026 01 AM PDT           10.55           2820         -              Normal
  05/01/2026 02 AM PDT           10.54           2811         -              Normal
  05/01/2026 03 AM PDT           10.53           2803         -              Normal
  05/01/2026 04 AM PDT           10.52           2795         -              Normal
  05/01/2026 05 AM PDT           10.51           2786         -              Normal
  05/01/2026 06 AM PDT           10.50           2778         -              Normal
  05/01/2026 07 AM PDT           10.49           2769         -              Normal
  05/01/2026 08 AM PDT           10.48           2761         -              Normal
  05/01/2026 09 AM PDT           10.47           2753         -              Normal
  05/01/2026 10 AM PDT           10.45           2736         -              Normal
  05/01/2026 11 AM PDT           10.43           2719         -              Normal
  05/01/2026 12 PM PDT           10.41           2703         -              Normal
  05/01/2026 01 PM PDT           10.40           2695         -              Normal
  05/01/2026 02 PM PDT           10.37           2670         -              Normal
  05/01/2026 03 PM PDT           10.34           2645         -              Normal
  05/01/2026 04 PM PDT           10.32           2629         -              Normal
  05/01/2026 05 PM PDT           10.29           2604         -              Normal
  05/01/2026 06 PM PDT           10.27           2588         -              Normal
  05/01/2026 07 PM PDT           10.25           2572         -              Normal
  05/01/2026 08 PM PDT           10.26           2580         +              Normal
  05/01/2026 09 PM PDT           10.22           2547         -              Normal
  05/01/2026 10 PM PDT           10.22           2547         0              Normal
  05/01/2026 11 PM PDT           10.21           2539         -              Normal
  05/02/2026 12 AM PDT           10.21           2539         0              Normal
  05/02/2026 01 AM PDT           10.20           2531         -              Normal
  05/02/2026 02 AM PDT           10.19           2523         -              Normal
  05/02/2026 03 AM PDT           10.18           2515         -              Normal
  05/02/2026 04 AM PDT           10.18           2515         0              Normal
  05/02/2026 05 AM PDT           10.17           2507         -              Normal
  05/02/2026 06 AM PDT           10.15           2491         -              Normal
  05/02/2026 07 AM PDT           10.13           2475         -              Normal
  05/02/2026 08 AM PDT           10.12           2467         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/02/2026 09 AM PDT           10.10           2451                        Normal
  05/02/2026 10 AM PDT           10.08           2436         -              Normal
  05/02/2026 11 AM PDT           10.06           2420         -              Normal
  05/02/2026 12 PM PDT           10.04           2404         -              Normal
  05/02/2026 01 PM PDT           10.02           2388         -              Normal
  05/02/2026 02 PM PDT           10.00           2373         -              Normal
  05/02/2026 03 PM PDT            9.98           2357         -              Normal
  05/02/2026 04 PM PDT            9.97           2349         -              Normal
  05/02/2026 05 PM PDT            9.95           2333         -              Normal
  05/02/2026 06 PM PDT            9.93           2318         -              Normal
  05/02/2026 07 PM PDT            9.91           2302         -              Normal
  05/02/2026 08 PM PDT            9.90           2295         -              Normal
  05/02/2026 09 PM PDT            9.88           2279         -              Normal
  05/02/2026 10 PM PDT            9.87           2272         -              Normal
  05/02/2026 11 PM PDT            9.86           2264         -              Normal
  05/03/2026 12 AM PDT            9.84           2249         -              Normal
  05/03/2026 01 AM PDT            9.82           2233         -              Normal
  05/03/2026 02 AM PDT            9.81           2226         -              Normal
  05/03/2026 03 AM PDT            9.79           2210         -              Normal
  05/03/2026 04 AM PDT            9.78           2203         -              Normal
  05/03/2026 05 AM PDT            9.76           2188         -              Normal
  05/03/2026 06 AM PDT            9.75           2180         -              Normal
  05/03/2026 07 AM PDT            9.73           2165         -              Normal
  05/03/2026 08 AM PDT            9.71           2150         -              Normal
  05/03/2026 09 AM PDT            9.70           2143         -              Normal
  05/03/2026 10 AM PDT            9.68           2128         -              Normal
  05/03/2026 11 AM PDT            9.66           2113         -              Normal
  05/03/2026 12 PM PDT            9.65           2105         -              Normal
  05/03/2026 01 PM PDT            9.63           2090         -              Normal
  05/03/2026 02 PM PDT            9.62           2083         -              Normal
  05/03/2026 03 PM PDT            9.60           2068         -              Normal
  05/03/2026 04 PM PDT            9.59           2061         -              Normal
  05/03/2026 05 PM PDT            9.57           2046         -              Normal
  05/03/2026 06 PM PDT            9.56           2039         -              Normal
  05/03/2026 07 PM PDT            9.54           2024         -              Normal
  05/03/2026 08 PM PDT            9.53           2017         -              Normal
  05/03/2026 09 PM PDT            9.52           2009         -              Normal
  05/03/2026 10 PM PDT            9.50           1995         -              Normal
  05/03/2026 11 PM PDT            9.49           1988         -              Normal
  05/04/2026 12 AM PDT            9.47           1973         -              Normal
  05/04/2026 01 AM PDT            9.46           1966         -              Normal
  05/04/2026 02 AM PDT            9.45           1959         -              Normal
  05/04/2026 03 AM PDT            9.44           1951         -              Normal
  05/04/2026 04 AM PDT            9.42           1937         -              Normal
  05/04/2026 05 AM PDT            9.41           1930         -              Normal
  05/04/2026 06 AM PDT            9.40           1923         -              Normal
  05/04/2026 07 AM PDT            9.38           1908         -              Normal
  05/04/2026 08 AM PDT            9.37           1901         -              Normal
  05/04/2026 09 AM PDT            9.36           1894         -              Normal
  05/04/2026 10 AM PDT            9.35           1887         -              Normal
  05/04/2026 11 AM PDT            9.34           1880         -              Normal
  05/04/2026 12 PM PDT            9.33           1873         -              Normal
  05/04/2026 01 PM PDT            9.32           1866         -              Normal
  05/04/2026 02 PM PDT            9.31           1859         -              Normal
  05/04/2026 03 PM PDT            9.30           1852         -              Normal
  05/04/2026 04 PM PDT            9.29           1845         -              Normal
  05/04/2026 05 PM PDT            9.28           1838         -              Normal
  05/04/2026 06 PM PDT            9.27           1831         -              Normal
  05/04/2026 07 PM PDT            9.26           1824         -              Normal
  05/04/2026 08 PM PDT            9.25           1817         -              Normal
  05/04/2026 09 PM PDT            9.24           1810         -              Normal
  05/04/2026 10 PM PDT            9.24           1810         0              Normal
  05/04/2026 11 PM PDT            9.23           1803         -              Normal
  05/05/2026 12 AM PDT            9.22           1796         -              Normal
  05/05/2026 01 AM PDT            9.21           1789         -              Normal
  05/05/2026 02 AM PDT            9.21           1789         0              Normal
  05/05/2026 03 AM PDT            9.20           1782         -              Normal
  05/05/2026 04 AM PDT            9.19           1775         -              Normal
  05/05/2026 05 AM PDT            9.18           1768         -              Normal
  05/05/2026 06 AM PDT            9.18           1768         0              Normal
  05/05/2026 07 AM PDT            9.17           1761         -              Normal
  05/05/2026 08 AM PDT            9.16           1754         -              Normal
  05/05/2026 09 AM PDT            9.15           1747         -              Normal
  05/05/2026 10 AM PDT            9.14           1740         -              Normal
  05/05/2026 11 AM PDT            9.14           1740         0              Normal
  05/05/2026 12 PM PDT            9.13           1734         -              Normal
  05/05/2026 01 PM PDT            9.12           1727         -              Normal
  05/05/2026 02 PM PDT            9.12           1727         0              Normal
  05/05/2026 03 PM PDT            9.11           1720         -              Normal
  05/05/2026 04 PM PDT            9.10           1713         -              Normal
  05/05/2026 05 PM PDT            9.10           1713         0              Normal
  05/05/2026 06 PM PDT            9.09           1706         -              Normal
  05/05/2026 07 PM PDT            9.09           1706         0              Normal
  05/05/2026 08 PM PDT            9.08           1700         -              Normal
  05/05/2026 09 PM PDT            9.08           1700         0              Normal
  05/05/2026 10 PM PDT            9.07           1693         -              Normal
  05/05/2026 11 PM PDT            9.07           1693         0              Normal
  05/06/2026 12 AM PDT            9.06           1686         -              Normal
  05/06/2026 01 AM PDT            9.06           1686         0              Normal
  05/06/2026 02 AM PDT            9.05           1679         -              Normal
  05/06/2026 03 AM PDT            9.05           1679         0              Normal
  05/06/2026 04 AM PDT            9.04           1672         -              Normal
  05/06/2026 05 AM PDT            9.04           1672         0              Normal
  05/06/2026 06 AM PDT            9.03           1666         -              Normal
  05/06/2026 07 AM PDT            9.03           1666         0              Normal
  05/06/2026 08 AM PDT            9.02           1659         -              Normal
  05/06/2026 09 AM PDT            9.02           1659         0              Normal
  05/06/2026 10 AM PDT            9.02           1659         0              Normal
  05/06/2026 11 AM PDT            9.01           1652         -              Normal
  05/06/2026 12 PM PDT            9.01           1652         0              Normal
  05/06/2026 01 PM PDT            9.00           1646         -              Normal
  05/06/2026 02 PM PDT            9.00           1646         0              Normal
  05/06/2026 03 PM PDT            9.00           1646         0              Normal
  05/06/2026 04 PM PDT            8.99           1639         -              Normal
  05/06/2026 05 PM PDT            8.99           1639         0              Normal
  05/06/2026 06 PM PDT            8.99           1639         0              Normal
  05/06/2026 07 PM PDT            8.99           1639         0              Normal
  05/06/2026 08 PM PDT            8.98           1632         -              Normal
  05/06/2026 09 PM PDT            8.98           1632         0              Normal
  05/06/2026 10 PM PDT            8.98           1632         0              Normal
  05/06/2026 11 PM PDT            8.98           1632         0              Normal
  05/07/2026 12 AM PDT            8.97           1626         -              Normal
  05/07/2026 01 AM PDT            8.97           1626         0              Normal
  05/07/2026 02 AM PDT            8.97           1626         0              Normal
  05/07/2026 03 AM PDT            8.97           1626         0              Normal
  05/07/2026 04 AM PDT            8.96           1619         -              Normal
  05/07/2026 05 AM PDT            8.96           1619         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.