National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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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 25 2026 at 8:34 AM PDTNext Issuance: Apr 26 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:  04/25/2026 at 08:34 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/24/2026 at 06:00 AM PDT
# Maximum Observed Stage:                       11.14 Feet
# Maximum Observed Flow:                        3330 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/27/2026 at 11:00 PM PDT
# Maximum Forecast Stage:                       11.19 Feet
# Maximum Forecast Flow:                        3373 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/20/2026 08 AM PDT           10.36           2662                        Normal
  04/20/2026 09 AM PDT           10.36           2662         0              Normal
  04/20/2026 10 AM PDT           10.36           2662         0              Normal
  04/20/2026 11 AM PDT           10.35           2653         -              Normal
  04/20/2026 12 PM PDT           10.33           2637         -              Normal
  04/20/2026 01 PM PDT           10.33           2637         0              Normal
  04/20/2026 02 PM PDT           10.30           2612         -              Normal
  04/20/2026 03 PM PDT           10.28           2596         -              Normal
  04/20/2026 04 PM PDT           10.27           2588         -              Normal
  04/20/2026 05 PM PDT           10.28           2596         +              Normal
  04/20/2026 06 PM PDT           10.26           2580         -              Normal
  04/20/2026 07 PM PDT           10.25           2572         -              Normal
  04/20/2026 08 PM PDT           10.27           2588         +              Normal
  04/20/2026 09 PM PDT           10.29           2604         +              Normal
  04/20/2026 10 PM PDT           10.29           2604         0              Normal
  04/20/2026 11 PM PDT           10.29           2604         0              Normal
  04/21/2026 12 AM PDT           10.30           2612         +              Normal
  04/21/2026 01 AM PDT           10.30           2612         0              Normal
  04/21/2026 02 AM PDT           10.31           2621         +              Normal
  04/21/2026 03 AM PDT           10.34           2645         +              Normal
  04/21/2026 04 AM PDT           10.36           2662         +              Normal
  04/21/2026 05 AM PDT           10.38           2678         +              Normal
  04/21/2026 06 AM PDT           10.41           2703         +              Normal
  04/21/2026 07 AM PDT           10.45           2736         +              Normal
  04/21/2026 08 AM PDT           10.47           2753         +              Normal
  04/21/2026 09 AM PDT           10.49           2769         +              Normal
  04/21/2026 10 AM PDT           10.52           2795         +              Normal
  04/21/2026 11 AM PDT           10.55           2820         +              Normal
  04/21/2026 12 PM PDT           10.57           2837         +              Normal
  04/21/2026 01 PM PDT           10.59           2854         +              Normal
  04/21/2026 02 PM PDT           10.64           2896         +              Normal
  04/21/2026 03 PM PDT           10.66           2913         +              Normal
  04/21/2026 04 PM PDT           10.68           2930         +              Normal
  04/21/2026 05 PM PDT           10.72           2965         +              Normal
  04/21/2026 06 PM PDT           10.74           2982         +              Normal
  04/21/2026 07 PM PDT           10.76           2999         +              Normal
  04/21/2026 08 PM PDT           10.79           3025         +              Normal
  04/21/2026 09 PM PDT           10.83           3060         +              Normal
  04/21/2026 10 PM PDT           10.84           3069         +              Normal
  04/21/2026 11 PM PDT           10.85           3078         +              Normal
  04/22/2026 12 AM PDT           10.87           3095         +              Normal
  04/22/2026 01 AM PDT           10.87           3095         0              Normal
  04/22/2026 02 AM PDT           10.88           3104         +              Normal
  04/22/2026 03 AM PDT           10.88           3104         0              Normal
  04/22/2026 04 AM PDT           10.90           3122         +              Normal
  04/22/2026 05 AM PDT           10.91           3131         +              Normal
  04/22/2026 06 AM PDT           10.93           3148         +              Normal
  04/22/2026 07 AM PDT           10.93           3148         0              Normal
  04/22/2026 08 AM PDT           10.94           3157         +              Normal
  04/22/2026 09 AM PDT           10.96           3175         +              Normal
  04/22/2026 10 AM PDT           10.96           3175         0              Normal
  04/22/2026 11 AM PDT           10.97           3184         +              Normal
  04/22/2026 12 PM PDT           10.97           3184         0              Normal
  04/22/2026 01 PM PDT           10.98           3193         +              Normal
  04/22/2026 02 PM PDT           10.98           3193         0              Normal
  04/22/2026 03 PM PDT           10.98           3193         0              Normal
  04/22/2026 04 PM PDT           10.98           3193         0              Normal
  04/22/2026 05 PM PDT           10.97           3184         -              Normal
  04/22/2026 06 PM PDT           10.97           3184         0              Normal
  04/22/2026 07 PM PDT           10.98           3193         +              Normal
  04/22/2026 08 PM PDT           10.98           3193         0              Normal
  04/22/2026 09 PM PDT           10.98           3193         0              Normal
  04/22/2026 10 PM PDT           10.98           3193         0              Normal
  04/22/2026 11 PM PDT           10.98           3193         0              Normal
  04/23/2026 12 AM PDT           10.97           3184         -              Normal
  04/23/2026 01 AM PDT           10.97           3184         0              Normal
  04/23/2026 02 AM PDT           10.97           3184         0              Normal
  04/23/2026 03 AM PDT           10.97           3184         0              Normal
  04/23/2026 04 AM PDT           10.98           3193         +              Normal
  04/23/2026 05 AM PDT           10.98           3193         0              Normal
  04/23/2026 06 AM PDT           10.97           3184         -              Normal
  04/23/2026 07 AM PDT           10.97           3184         0              Normal
  04/23/2026 08 AM PDT           10.97           3184         0              Normal
  04/23/2026 09 AM PDT           10.96           3175         -              Normal
  04/23/2026 10 AM PDT           10.97           3184         +              Normal
  04/23/2026 11 AM PDT           10.99           3201         +              Normal
  04/23/2026 12 PM PDT           11.01           3219         +              Normal
  04/23/2026 01 PM PDT           11.01           3219         0              Normal
  04/23/2026 02 PM PDT           11.01           3219         0              Normal
  04/23/2026 03 PM PDT           11.03           3236         +              Normal
  04/23/2026 04 PM PDT           11.05           3253         +              Normal
  04/23/2026 05 PM PDT           11.05           3253         0              Normal
  04/23/2026 06 PM PDT           11.06           3262         +              Normal
  04/23/2026 07 PM PDT           11.08           3279         +              Normal
  04/23/2026 08 PM PDT           11.09           3288         +              Normal
  04/23/2026 09 PM PDT           11.10           3296         +              Normal
  04/23/2026 10 PM PDT           11.11           3305         +              Normal
  04/23/2026 11 PM PDT           11.12           3313         +              Normal
  04/24/2026 12 AM PDT           11.13           3322         +              Normal
  04/24/2026 01 AM PDT           11.13           3322         0              Normal
  04/24/2026 02 AM PDT           11.14           3330         +              Normal
  04/24/2026 03 AM PDT           11.14           3330         0              Normal
  04/24/2026 04 AM PDT           11.14           3330         0              Normal
  04/24/2026 05 AM PDT           11.14           3330         0              Normal
  04/24/2026 06 AM PDT           11.14           3330         0              Normal
  04/24/2026 07 AM PDT           11.13           3322         -              Normal
  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
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/25/2026 09 AM PDT           10.76           2999                        Normal
  04/25/2026 10 AM PDT           10.75           2991         -              Normal
  04/25/2026 11 AM PDT           10.74           2982         -              Normal
  04/25/2026 12 PM PDT           10.73           2973         -              Normal
  04/25/2026 01 PM PDT           10.72           2965         -              Normal
  04/25/2026 02 PM PDT           10.72           2965         0              Normal
  04/25/2026 03 PM PDT           10.71           2956         -              Normal
  04/25/2026 04 PM PDT           10.71           2956         0              Normal
  04/25/2026 05 PM PDT           10.71           2956         0              Normal
  04/25/2026 06 PM PDT           10.70           2948         -              Normal
  04/25/2026 07 PM PDT           10.70           2948         0              Normal
  04/25/2026 08 PM PDT           10.71           2956         +              Normal
  04/25/2026 09 PM PDT           10.71           2956         0              Normal
  04/25/2026 10 PM PDT           10.71           2956         0              Normal
  04/25/2026 11 PM PDT           10.72           2965         +              Normal
  04/26/2026 12 AM PDT           10.72           2965         0              Normal
  04/26/2026 01 AM PDT           10.73           2973         +              Normal
  04/26/2026 02 AM PDT           10.74           2982         +              Normal
  04/26/2026 03 AM PDT           10.75           2991         +              Normal
  04/26/2026 04 AM PDT           10.76           2999         +              Normal
  04/26/2026 05 AM PDT           10.78           3017         +              Normal
  04/26/2026 06 AM PDT           10.79           3025         +              Normal
  04/26/2026 07 AM PDT           10.81           3043         +              Normal
  04/26/2026 08 AM PDT           10.82           3052         +              Normal
  04/26/2026 09 AM PDT           10.84           3069         +              Normal
  04/26/2026 10 AM PDT           10.86           3087         +              Normal
  04/26/2026 11 AM PDT           10.87           3095         +              Normal
  04/26/2026 12 PM PDT           10.89           3113         +              Normal
  04/26/2026 01 PM PDT           10.91           3131         +              Normal
  04/26/2026 02 PM PDT           10.92           3139         +              Normal
  04/26/2026 03 PM PDT           10.94           3157         +              Normal
  04/26/2026 04 PM PDT           10.96           3175         +              Normal
  04/26/2026 05 PM PDT           10.97           3184         +              Normal
  04/26/2026 06 PM PDT           10.99           3201         +              Normal
  04/26/2026 07 PM PDT           11.01           3219         +              Normal
  04/26/2026 08 PM PDT           11.02           3227         +              Normal
  04/26/2026 09 PM PDT           11.04           3245         +              Normal
  04/26/2026 10 PM PDT           11.05           3253         +              Normal
  04/26/2026 11 PM PDT           11.06           3262         +              Normal
  04/27/2026 12 AM PDT           11.07           3270         +              Normal
  04/27/2026 01 AM PDT           11.08           3279         +              Normal
  04/27/2026 02 AM PDT           11.09           3288         +              Normal
  04/27/2026 03 AM PDT           11.10           3296         +              Normal
  04/27/2026 04 AM PDT           11.10           3296         0              Normal
  04/27/2026 05 AM PDT           11.11           3305         +              Normal
  04/27/2026 06 AM PDT           11.11           3305         0              Normal
  04/27/2026 07 AM PDT           11.12           3313         +              Normal
  04/27/2026 08 AM PDT           11.12           3313         0              Normal
  04/27/2026 09 AM PDT           11.12           3313         0              Normal
  04/27/2026 10 AM PDT           11.13           3322         +              Normal
  04/27/2026 11 AM PDT           11.13           3322         0              Normal
  04/27/2026 12 PM PDT           11.14           3330         +              Normal
  04/27/2026 01 PM PDT           11.14           3330         0              Normal
  04/27/2026 02 PM PDT           11.15           3339         +              Normal
  04/27/2026 03 PM PDT           11.15           3339         0              Normal
  04/27/2026 04 PM PDT           11.16           3348         +              Normal
  04/27/2026 05 PM PDT           11.16           3348         0              Normal
  04/27/2026 06 PM PDT           11.17           3356         +              Normal
  04/27/2026 07 PM PDT           11.17           3356         0              Normal
  04/27/2026 08 PM PDT           11.18           3365         +              Normal
  04/27/2026 09 PM PDT           11.18           3365         0              Normal
  04/27/2026 10 PM PDT           11.18           3365         0              Normal
  04/27/2026 11 PM PDT           11.19           3373         +              Normal
  04/28/2026 12 AM PDT           11.19           3373         0              Normal
  04/28/2026 01 AM PDT           11.19           3373         0              Normal
  04/28/2026 02 AM PDT           11.19           3373         0              Normal
  04/28/2026 03 AM PDT           11.19           3373         0              Normal
  04/28/2026 04 AM PDT           11.19           3373         0              Normal
  04/28/2026 05 AM PDT           11.18           3365         -              Normal
  04/28/2026 06 AM PDT           11.18           3365         0              Normal
  04/28/2026 07 AM PDT           11.17           3356         -              Normal
  04/28/2026 08 AM PDT           11.16           3348         -              Normal
  04/28/2026 09 AM PDT           11.15           3339         -              Normal
  04/28/2026 10 AM PDT           11.14           3330         -              Normal
  04/28/2026 11 AM PDT           11.13           3322         -              Normal
  04/28/2026 12 PM PDT           11.12           3313         -              Normal
  04/28/2026 01 PM PDT           11.12           3313         0              Normal
  04/28/2026 02 PM PDT           11.10           3296         -              Normal
  04/28/2026 03 PM PDT           11.09           3288         -              Normal
  04/28/2026 04 PM PDT           11.08           3279         -              Normal
  04/28/2026 05 PM PDT           11.07           3270         -              Normal
  04/28/2026 06 PM PDT           11.06           3262         -              Normal
  04/28/2026 07 PM PDT           11.05           3253         -              Normal
  04/28/2026 08 PM PDT           11.04           3245         -              Normal
  04/28/2026 09 PM PDT           11.03           3236         -              Normal
  04/28/2026 10 PM PDT           11.02           3227         -              Normal
  04/28/2026 11 PM PDT           11.01           3219         -              Normal
  04/29/2026 12 AM PDT           11.00           3210         -              Normal
  04/29/2026 01 AM PDT           10.99           3201         -              Normal
  04/29/2026 02 AM PDT           10.99           3201         0              Normal
  04/29/2026 03 AM PDT           10.98           3193         -              Normal
  04/29/2026 04 AM PDT           10.97           3184         -              Normal
  04/29/2026 05 AM PDT           10.96           3175         -              Normal
  04/29/2026 06 AM PDT           10.96           3175         0              Normal
  04/29/2026 07 AM PDT           10.95           3166         -              Normal
  04/29/2026 08 AM PDT           10.95           3166         0              Normal
  04/29/2026 09 AM PDT           10.94           3157         -              Normal
  04/29/2026 10 AM PDT           10.93           3148         -              Normal
  04/29/2026 11 AM PDT           10.93           3148         0              Normal
  04/29/2026 12 PM PDT           10.92           3139         -              Normal
  04/29/2026 01 PM PDT           10.92           3139         0              Normal
  04/29/2026 02 PM PDT           10.91           3131         -              Normal
  04/29/2026 03 PM PDT           10.91           3131         0              Normal
  04/29/2026 04 PM PDT           10.90           3122         -              Normal
  04/29/2026 05 PM PDT           10.90           3122         0              Normal
  04/29/2026 06 PM PDT           10.90           3122         0              Normal
  04/29/2026 07 PM PDT           10.89           3113         -              Normal
  04/29/2026 08 PM PDT           10.89           3113         0              Normal
  04/29/2026 09 PM PDT           10.89           3113         0              Normal
  04/29/2026 10 PM PDT           10.89           3113         0              Normal
  04/29/2026 11 PM PDT           10.88           3104         -              Normal
  04/30/2026 12 AM PDT           10.88           3104         0              Normal
  04/30/2026 01 AM PDT           10.88           3104         0              Normal
  04/30/2026 02 AM PDT           10.88           3104         0              Normal
  04/30/2026 03 AM PDT           10.88           3104         0              Normal
  04/30/2026 04 AM PDT           10.87           3095         -              Normal
  04/30/2026 05 AM PDT           10.87           3095         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.