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: Apr 29 2026 at 8:51 AM PDTNext Issuance: Apr 30 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:  04/29/2026 at 08:51 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/24/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       11.11 Feet
# Maximum Observed Flow:                        3305 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/30/2026 at 03:00 AM PDT
# Maximum Forecast Stage:                       10.77 Feet
# Maximum Forecast Flow:                        3008 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/24/2026 08 AM PDT           11.11           3305                        Normal
  04/24/2026 09 AM PDT           11.10           3296         -              Normal
  04/24/2026 10 AM PDT           11.09           3288         -              Normal
  04/24/2026 11 AM PDT           11.09           3288         0              Normal
  04/24/2026 12 PM PDT           11.07           3270         -              Normal
  04/24/2026 01 PM PDT           11.05           3253         -              Normal
  04/24/2026 02 PM PDT           11.05           3253         0              Normal
  04/24/2026 03 PM PDT           11.03           3236         -              Normal
  04/24/2026 04 PM PDT           11.02           3227         -              Normal
  04/24/2026 05 PM PDT           10.98           3193         -              Normal
  04/24/2026 06 PM PDT           10.96           3175         -              Normal
  04/24/2026 07 PM PDT           10.94           3157         -              Normal
  04/24/2026 08 PM PDT           10.91           3131         -              Normal
  04/24/2026 09 PM PDT           10.90           3122         -              Normal
  04/24/2026 10 PM PDT           10.90           3122         0              Normal
  04/24/2026 11 PM PDT           10.89           3113         -              Normal
  04/25/2026 12 AM PDT           10.87           3095         -              Normal
  04/25/2026 01 AM PDT           10.86           3087         -              Normal
  04/25/2026 02 AM PDT           10.85           3078         -              Normal
  04/25/2026 03 AM PDT           10.83           3060         -              Normal
  04/25/2026 04 AM PDT           10.82           3052         -              Normal
  04/25/2026 05 AM PDT           10.81           3043         -              Normal
  04/25/2026 06 AM PDT           10.80           3034         -              Normal
  04/25/2026 07 AM PDT           10.79           3025         -              Normal
  04/25/2026 08 AM PDT           10.78           3017         -              Normal
  04/25/2026 09 AM PDT           10.78           3017         0              Normal
  04/25/2026 10 AM PDT           10.77           3008         -              Normal
  04/25/2026 11 AM PDT           10.77           3008         0              Normal
  04/25/2026 12 PM PDT           10.75           2991         -              Normal
  04/25/2026 01 PM PDT           10.74           2982         -              Normal
  04/25/2026 02 PM PDT           10.71           2956         -              Normal
  04/25/2026 03 PM PDT           10.70           2948         -              Normal
  04/25/2026 04 PM PDT           10.69           2939         -              Normal
  04/25/2026 05 PM PDT           10.68           2930         -              Normal
  04/25/2026 06 PM PDT           10.66           2913         -              Normal
  04/25/2026 07 PM PDT           10.66           2913         0              Normal
  04/25/2026 08 PM PDT           10.66           2913         0              Normal
  04/25/2026 09 PM PDT           10.66           2913         0              Normal
  04/25/2026 10 PM PDT           10.67           2922         +              Normal
  04/25/2026 11 PM PDT           10.67           2922         0              Normal
  04/26/2026 12 AM PDT           10.67           2922         0              Normal
  04/26/2026 01 AM PDT           10.67           2922         0              Normal
  04/26/2026 02 AM PDT           10.68           2930         +              Normal
  04/26/2026 03 AM PDT           10.68           2930         0              Normal
  04/26/2026 04 AM PDT           10.69           2939         +              Normal
  04/26/2026 05 AM PDT           10.69           2939         0              Normal
  04/26/2026 06 AM PDT           10.71           2956         +              Normal
  04/26/2026 07 AM PDT           10.73           2973         +              Normal
  04/26/2026 08 AM PDT           10.75           2991         +              Normal
  04/26/2026 09 AM PDT           10.76           2999         +              Normal
  04/26/2026 10 AM PDT           10.78           3017         +              Normal
  04/26/2026 11 AM PDT           10.79           3025         +              Normal
  04/26/2026 12 PM PDT           10.80           3034         +              Normal
  04/26/2026 01 PM PDT           10.82           3052         +              Normal
  04/26/2026 02 PM PDT           10.84           3069         +              Normal
  04/26/2026 03 PM PDT           10.85           3078         +              Normal
  04/26/2026 04 PM PDT           10.87           3095         +              Normal
  04/26/2026 05 PM PDT           10.88           3104         +              Normal
  04/26/2026 06 PM PDT           10.88           3104         0              Normal
  04/26/2026 07 PM PDT           10.89           3113         +              Normal
  04/26/2026 08 PM PDT           10.89           3113         0              Normal
  04/26/2026 09 PM PDT           10.91           3131         +              Normal
  04/26/2026 10 PM PDT           10.92           3139         +              Normal
  04/26/2026 11 PM PDT           10.92           3139         0              Normal
  04/27/2026 12 AM PDT           10.94           3157         +              Normal
  04/27/2026 01 AM PDT           10.94           3157         0              Normal
  04/27/2026 02 AM PDT           10.96           3175         +              Normal
  04/27/2026 03 AM PDT           10.96           3175         0              Normal
  04/27/2026 04 AM PDT           10.97           3184         +              Normal
  04/27/2026 05 AM PDT           10.98           3193         +              Normal
  04/27/2026 06 AM PDT           10.97           3184         -              Normal
  04/27/2026 07 AM PDT           10.97           3184         0              Normal
  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           10.59           2854         0              Normal
  04/29/2026 08 AM PDT           10.60           2862         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/29/2026 09 AM PDT           10.61           2871                        Normal
  04/29/2026 10 AM PDT           10.62           2879         +              Normal
  04/29/2026 11 AM PDT           10.63           2888         +              Normal
  04/29/2026 12 PM PDT           10.64           2896         +              Normal
  04/29/2026 01 PM PDT           10.65           2905         +              Normal
  04/29/2026 02 PM PDT           10.66           2913         +              Normal
  04/29/2026 03 PM PDT           10.68           2930         +              Normal
  04/29/2026 04 PM PDT           10.69           2939         +              Normal
  04/29/2026 05 PM PDT           10.70           2948         +              Normal
  04/29/2026 06 PM PDT           10.71           2956         +              Normal
  04/29/2026 07 PM PDT           10.72           2965         +              Normal
  04/29/2026 08 PM PDT           10.73           2973         +              Normal
  04/29/2026 09 PM PDT           10.74           2982         +              Normal
  04/29/2026 10 PM PDT           10.74           2982         0              Normal
  04/29/2026 11 PM PDT           10.75           2991         +              Normal
  04/30/2026 12 AM PDT           10.76           2999         +              Normal
  04/30/2026 01 AM PDT           10.76           2999         0              Normal
  04/30/2026 02 AM PDT           10.76           2999         0              Normal
  04/30/2026 03 AM PDT           10.77           3008         +              Normal
  04/30/2026 04 AM PDT           10.76           2999         -              Normal
  04/30/2026 05 AM PDT           10.76           2999         0              Normal
  04/30/2026 06 AM PDT           10.76           2999         0              Normal
  04/30/2026 07 AM PDT           10.75           2991         -              Normal
  04/30/2026 08 AM PDT           10.75           2991         0              Normal
  04/30/2026 09 AM PDT           10.74           2982         -              Normal
  04/30/2026 10 AM PDT           10.73           2973         -              Normal
  04/30/2026 11 AM PDT           10.73           2973         0              Normal
  04/30/2026 12 PM PDT           10.72           2965         -              Normal
  04/30/2026 01 PM PDT           10.71           2956         -              Normal
  04/30/2026 02 PM PDT           10.70           2948         -              Normal
  04/30/2026 03 PM PDT           10.69           2939         -              Normal
  04/30/2026 04 PM PDT           10.68           2930         -              Normal
  04/30/2026 05 PM PDT           10.67           2922         -              Normal
  04/30/2026 06 PM PDT           10.66           2913         -              Normal
  04/30/2026 07 PM PDT           10.65           2905         -              Normal
  04/30/2026 08 PM PDT           10.64           2896         -              Normal
  04/30/2026 09 PM PDT           10.63           2888         -              Normal
  04/30/2026 10 PM PDT           10.62           2879         -              Normal
  04/30/2026 11 PM PDT           10.60           2862         -              Normal
  05/01/2026 12 AM PDT           10.59           2854         -              Normal
  05/01/2026 01 AM PDT           10.58           2845         -              Normal
  05/01/2026 02 AM PDT           10.57           2837         -              Normal
  05/01/2026 03 AM PDT           10.55           2820         -              Normal
  05/01/2026 04 AM PDT           10.54           2811         -              Normal
  05/01/2026 05 AM PDT           10.52           2795         -              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           10.47           2753         -              Normal
  05/01/2026 09 AM PDT           10.45           2736         -              Normal
  05/01/2026 10 AM PDT           10.43           2719         -              Normal
  05/01/2026 11 AM PDT           10.41           2703         -              Normal
  05/01/2026 12 PM PDT           10.40           2695         -              Normal
  05/01/2026 01 PM PDT           10.38           2678         -              Normal
  05/01/2026 02 PM PDT           10.36           2662         -              Normal
  05/01/2026 03 PM PDT           10.35           2653         -              Normal
  05/01/2026 04 PM PDT           10.33           2637         -              Normal
  05/01/2026 05 PM PDT           10.31           2621         -              Normal
  05/01/2026 06 PM PDT           10.30           2612         -              Normal
  05/01/2026 07 PM PDT           10.28           2596         -              Normal
  05/01/2026 08 PM PDT           10.27           2588         -              Normal
  05/01/2026 09 PM PDT           10.26           2580         -              Normal
  05/01/2026 10 PM PDT           10.24           2564         -              Normal
  05/01/2026 11 PM PDT           10.22           2547         -              Normal
  05/02/2026 12 AM PDT           10.21           2539         -              Normal
  05/02/2026 01 AM PDT           10.19           2523         -              Normal
  05/02/2026 02 AM PDT           10.18           2515         -              Normal
  05/02/2026 03 AM PDT           10.16           2499         -              Normal
  05/02/2026 04 AM PDT           10.15           2491         -              Normal
  05/02/2026 05 AM PDT           10.13           2475         -              Normal
  05/02/2026 06 AM PDT           10.12           2467         -              Normal
  05/02/2026 07 AM PDT           10.10           2451         -              Normal
  05/02/2026 08 AM PDT           10.08           2436         -              Normal
  05/02/2026 09 AM PDT           10.07           2428         -              Normal
  05/02/2026 10 AM PDT           10.05           2412         -              Normal
  05/02/2026 11 AM PDT           10.04           2404         -              Normal
  05/02/2026 12 PM PDT           10.02           2388         -              Normal
  05/02/2026 01 PM PDT           10.01           2380         -              Normal
  05/02/2026 02 PM PDT            9.99           2365         -              Normal
  05/02/2026 03 PM PDT            9.98           2357         -              Normal
  05/02/2026 04 PM PDT            9.96           2341         -              Normal
  05/02/2026 05 PM PDT            9.95           2333         -              Normal
  05/02/2026 06 PM PDT            9.94           2326         -              Normal
  05/02/2026 07 PM PDT            9.93           2318         -              Normal
  05/02/2026 08 PM PDT            9.91           2302         -              Normal
  05/02/2026 09 PM PDT            9.90           2295         -              Normal
  05/02/2026 10 PM PDT            9.89           2287         -              Normal
  05/02/2026 11 PM PDT            9.88           2279         -              Normal
  05/03/2026 12 AM PDT            9.87           2272         -              Normal
  05/03/2026 01 AM PDT            9.86           2264         -              Normal
  05/03/2026 02 AM PDT            9.84           2249         -              Normal
  05/03/2026 03 AM PDT            9.83           2241         -              Normal
  05/03/2026 04 AM PDT            9.82           2233         -              Normal
  05/03/2026 05 AM PDT            9.81           2226         -              Normal
  05/03/2026 06 AM PDT            9.80           2218         -              Normal
  05/03/2026 07 AM PDT            9.79           2210         -              Normal
  05/03/2026 08 AM PDT            9.78           2203         -              Normal
  05/03/2026 09 AM PDT            9.77           2195         -              Normal
  05/03/2026 10 AM PDT            9.76           2188         -              Normal
  05/03/2026 11 AM PDT            9.75           2180         -              Normal
  05/03/2026 12 PM PDT            9.74           2173         -              Normal
  05/03/2026 01 PM PDT            9.73           2165         -              Normal
  05/03/2026 02 PM PDT            9.72           2158         -              Normal
  05/03/2026 03 PM PDT            9.71           2150         -              Normal
  05/03/2026 04 PM PDT            9.71           2150         0              Normal
  05/03/2026 05 PM PDT            9.70           2143         -              Normal
  05/03/2026 06 PM PDT            9.69           2135         -              Normal
  05/03/2026 07 PM PDT            9.69           2135         0              Normal
  05/03/2026 08 PM PDT            9.68           2128         -              Normal
  05/03/2026 09 PM PDT            9.67           2120         -              Normal
  05/03/2026 10 PM PDT            9.66           2113         -              Normal
  05/03/2026 11 PM PDT            9.66           2113         0              Normal
  05/04/2026 12 AM PDT            9.65           2105         -              Normal
  05/04/2026 01 AM PDT            9.64           2098         -              Normal
  05/04/2026 02 AM PDT            9.64           2098         0              Normal
  05/04/2026 03 AM PDT            9.63           2090         -              Normal
  05/04/2026 04 AM PDT            9.62           2083         -              Normal
  05/04/2026 05 AM PDT            9.61           2076         -              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.