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SAN JOAQUIN RIVER - VERNALIS (VNSC1)
| Latitude: 37.68º N | Longitude: 121.27º W | Elevation: 35 Feet | | Forecast Type: Official Location |
| Location: San Joaquin County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Apr 28 2026 at 7:54 AM PDT | Next Issuance: | Apr 29 2026 at 9:00 AM PDT
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| Action/Monitor: 24.5 Feet | Minor Flood: 29.0 Feet | Moderate Flood: 32.0 Feet | Major Flood: 37.3 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Vernalis (VNSC1)
#
# File Generation Time: 04/28/2026 at 07:54 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: 04/28/2026 at 11:00 PM PDT
# Maximum Forecast Stage: 10.71 Feet
# Maximum Forecast Flow: 2956 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/23/2026 07 AM PDT 10.97 3184 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
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 10.67 2922 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/28/2026 08 AM PDT 10.66 2913 Normal
04/28/2026 09 AM PDT 10.67 2922 + Normal
04/28/2026 10 AM PDT 10.67 2922 0 Normal
04/28/2026 11 AM PDT 10.67 2922 0 Normal
04/28/2026 12 PM PDT 10.67 2922 0 Normal
04/28/2026 01 PM PDT 10.67 2922 0 Normal
04/28/2026 02 PM PDT 10.68 2930 + Normal
04/28/2026 03 PM PDT 10.68 2930 0 Normal
04/28/2026 04 PM PDT 10.68 2930 0 Normal
04/28/2026 05 PM PDT 10.69 2939 + Normal
04/28/2026 06 PM PDT 10.69 2939 0 Normal
04/28/2026 07 PM PDT 10.69 2939 0 Normal
04/28/2026 08 PM PDT 10.70 2948 + Normal
04/28/2026 09 PM PDT 10.70 2948 0 Normal
04/28/2026 10 PM PDT 10.70 2948 0 Normal
04/28/2026 11 PM PDT 10.71 2956 + Normal
04/29/2026 12 AM PDT 10.71 2956 0 Normal
04/29/2026 01 AM PDT 10.71 2956 0 Normal
04/29/2026 02 AM PDT 10.71 2956 0 Normal
04/29/2026 03 AM PDT 10.70 2948 - Normal
04/29/2026 04 AM PDT 10.70 2948 0 Normal
04/29/2026 05 AM PDT 10.69 2939 - Normal
04/29/2026 06 AM PDT 10.68 2930 - Normal
04/29/2026 07 AM PDT 10.66 2913 - Normal
04/29/2026 08 AM PDT 10.65 2905 - Normal
04/29/2026 09 AM PDT 10.63 2888 - Normal
04/29/2026 10 AM PDT 10.61 2871 - Normal
04/29/2026 11 AM PDT 10.59 2854 - Normal
04/29/2026 12 PM PDT 10.57 2837 - Normal
04/29/2026 01 PM PDT 10.55 2820 - Normal
04/29/2026 02 PM PDT 10.53 2803 - Normal
04/29/2026 03 PM PDT 10.51 2786 - Normal
04/29/2026 04 PM PDT 10.48 2761 - Normal
04/29/2026 05 PM PDT 10.46 2744 - Normal
04/29/2026 06 PM PDT 10.44 2728 - Normal
04/29/2026 07 PM PDT 10.42 2711 - Normal
04/29/2026 08 PM PDT 10.40 2695 - Normal
04/29/2026 09 PM PDT 10.38 2678 - Normal
04/29/2026 10 PM PDT 10.35 2653 - Normal
04/29/2026 11 PM PDT 10.33 2637 - Normal
04/30/2026 12 AM PDT 10.31 2621 - Normal
04/30/2026 01 AM PDT 10.29 2604 - Normal
04/30/2026 02 AM PDT 10.28 2596 - Normal
04/30/2026 03 AM PDT 10.26 2580 - Normal
04/30/2026 04 AM PDT 10.24 2564 - Normal
04/30/2026 05 AM PDT 10.22 2547 - Normal
04/30/2026 06 AM PDT 10.21 2539 - Normal
04/30/2026 07 AM PDT 10.19 2523 - Normal
04/30/2026 08 AM PDT 10.18 2515 - Normal
04/30/2026 09 AM PDT 10.16 2499 - Normal
04/30/2026 10 AM PDT 10.15 2491 - Normal
04/30/2026 11 AM PDT 10.13 2475 - Normal
04/30/2026 12 PM PDT 10.12 2467 - Normal
04/30/2026 01 PM PDT 10.11 2459 - Normal
04/30/2026 02 PM PDT 10.10 2451 - Normal
04/30/2026 03 PM PDT 10.09 2443 - Normal
04/30/2026 04 PM PDT 10.08 2436 - Normal
04/30/2026 05 PM PDT 10.07 2428 - Normal
04/30/2026 06 PM PDT 10.06 2420 - Normal
04/30/2026 07 PM PDT 10.05 2412 - Normal
04/30/2026 08 PM PDT 10.04 2404 - Normal
04/30/2026 09 PM PDT 10.03 2396 - Normal
04/30/2026 10 PM PDT 10.03 2396 0 Normal
04/30/2026 11 PM PDT 10.03 2396 0 Normal
05/01/2026 12 AM PDT 10.03 2396 0 Normal
05/01/2026 01 AM PDT 10.03 2396 0 Normal
05/01/2026 02 AM PDT 10.04 2404 + Normal
05/01/2026 03 AM PDT 10.05 2412 + Normal
05/01/2026 04 AM PDT 10.06 2420 + Normal
05/01/2026 05 AM PDT 10.07 2428 + Normal
05/01/2026 06 AM PDT 10.08 2436 + Normal
05/01/2026 07 AM PDT 10.09 2443 + Normal
05/01/2026 08 AM PDT 10.11 2459 + Normal
05/01/2026 09 AM PDT 10.12 2467 + Normal
05/01/2026 10 AM PDT 10.14 2483 + Normal
05/01/2026 11 AM PDT 10.15 2491 + Normal
05/01/2026 12 PM PDT 10.17 2507 + Normal
05/01/2026 01 PM PDT 10.19 2523 + Normal
05/01/2026 02 PM PDT 10.20 2531 + Normal
05/01/2026 03 PM PDT 10.22 2547 + Normal
05/01/2026 04 PM PDT 10.23 2556 + Normal
05/01/2026 05 PM PDT 10.25 2572 + Normal
05/01/2026 06 PM PDT 10.26 2580 + Normal
05/01/2026 07 PM PDT 10.28 2596 + Normal
05/01/2026 08 PM PDT 10.29 2604 + Normal
05/01/2026 09 PM PDT 10.30 2612 + Normal
05/01/2026 10 PM PDT 10.31 2621 + Normal
05/01/2026 11 PM PDT 10.32 2629 + Normal
05/02/2026 12 AM PDT 10.33 2637 + Normal
05/02/2026 01 AM PDT 10.34 2645 + Normal
05/02/2026 02 AM PDT 10.35 2653 + Normal
05/02/2026 03 AM PDT 10.35 2653 0 Normal
05/02/2026 04 AM PDT 10.36 2662 + Normal
05/02/2026 05 AM PDT 10.36 2662 0 Normal
05/02/2026 06 AM PDT 10.37 2670 + Normal
05/02/2026 07 AM PDT 10.37 2670 0 Normal
05/02/2026 08 AM PDT 10.38 2678 + Normal
05/02/2026 09 AM PDT 10.38 2678 0 Normal
05/02/2026 10 AM PDT 10.39 2686 + Normal
05/02/2026 11 AM PDT 10.39 2686 0 Normal
05/02/2026 12 PM PDT 10.39 2686 0 Normal
05/02/2026 01 PM PDT 10.40 2695 + Normal
05/02/2026 02 PM PDT 10.40 2695 0 Normal
05/02/2026 03 PM PDT 10.40 2695 0 Normal
05/02/2026 04 PM PDT 10.40 2695 0 Normal
05/02/2026 05 PM PDT 10.41 2703 + Normal
05/02/2026 06 PM PDT 10.41 2703 0 Normal
05/02/2026 07 PM PDT 10.41 2703 0 Normal
05/02/2026 08 PM PDT 10.41 2703 0 Normal
05/02/2026 09 PM PDT 10.41 2703 0 Normal
05/02/2026 10 PM PDT 10.41 2703 0 Normal
05/02/2026 11 PM PDT 10.41 2703 0 Normal
05/03/2026 12 AM PDT 10.40 2695 - Normal
05/03/2026 01 AM PDT 10.40 2695 0 Normal
05/03/2026 02 AM PDT 10.40 2695 0 Normal
05/03/2026 03 AM PDT 10.39 2686 - Normal
05/03/2026 04 AM PDT 10.39 2686 0 Normal
05/03/2026 05 AM PDT 10.38 2678 - 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.
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