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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: | Sep 26 2026 at 8:10 AM PDT | Next Issuance: | Sep 27 2026 at 9:00 AM PDT
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| Action: 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: 09/26/2026 at 08:10 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 09/21/2026 at 10:00 AM PDT
# Maximum Observed Stage: 7.47 Feet
# Maximum Observed Flow: 761 cfs
#
# Earliest Date & Time of Maximum Forecast: 10/01/2026 at 03:00 AM PDT
# Maximum Forecast Stage: 7.91 Feet
# Maximum Forecast Flow: 986 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
09/21/2026 08 AM PDT 7.47 761 Normal
09/21/2026 09 AM PDT 7.47 761 0 Normal
09/21/2026 10 AM PDT 7.47 761 0 Normal
09/21/2026 11 AM PDT 7.46 756 - Normal
09/21/2026 12 PM PDT 7.45 752 - Normal
09/21/2026 01 PM PDT 7.45 752 0 Normal
09/21/2026 02 PM PDT 7.44 747 - Normal
09/21/2026 03 PM PDT 7.43 742 - Normal
09/21/2026 04 PM PDT 7.39 723 - Normal
09/21/2026 05 PM PDT 7.38 718 - Normal
09/21/2026 06 PM PDT 7.36 709 - Normal
09/21/2026 07 PM PDT 7.35 704 - Normal
09/21/2026 08 PM PDT 7.33 695 - Normal
09/21/2026 09 PM PDT 7.32 690 - Normal
09/21/2026 10 PM PDT 7.32 690 0 Normal
09/21/2026 11 PM PDT 7.28 672 - Normal
09/22/2026 12 AM PDT 7.28 672 0 Normal
09/22/2026 01 AM PDT 7.30 681 + Normal
09/22/2026 02 AM PDT 7.31 686 + Normal
09/22/2026 03 AM PDT 7.30 681 - Normal
09/22/2026 04 AM PDT 7.30 681 0 Normal
09/22/2026 05 AM PDT 7.30 681 0 Normal
09/22/2026 06 AM PDT 7.31 686 + Normal
09/22/2026 07 AM PDT 7.31 686 0 Normal
09/22/2026 08 AM PDT 7.32 690 + Normal
09/22/2026 09 AM PDT 7.32 690 0 Normal
09/22/2026 10 AM PDT 7.31 686 - Normal
09/22/2026 11 AM PDT 7.28 672 - Normal
09/22/2026 12 PM PDT 7.28 672 0 Normal
09/22/2026 01 PM PDT 7.28 672 0 Normal
09/22/2026 02 PM PDT 7.27 667 - Normal
09/22/2026 03 PM PDT 7.24 654 - Normal
09/22/2026 04 PM PDT 7.25 658 + Normal
09/22/2026 05 PM PDT 7.22 645 - Normal
09/22/2026 06 PM PDT 7.21 640 - Normal
09/22/2026 07 PM PDT 7.20 636 - Normal
09/22/2026 08 PM PDT 7.21 640 + Normal
09/22/2026 09 PM PDT 7.20 636 - Normal
09/22/2026 10 PM PDT 7.20 636 0 Normal
09/22/2026 11 PM PDT 7.19 631 - Normal
09/23/2026 12 AM PDT 7.20 636 + Normal
09/23/2026 01 AM PDT 7.20 636 0 Normal
09/23/2026 02 AM PDT 7.21 640 + Normal
09/23/2026 03 AM PDT 7.21 640 0 Normal
09/23/2026 04 AM PDT 7.22 645 + Normal
09/23/2026 05 AM PDT 7.22 645 0 Normal
09/23/2026 06 AM PDT 7.22 645 0 Normal
09/23/2026 07 AM PDT 7.23 649 + Normal
09/23/2026 08 AM PDT 7.22 645 - Normal
09/23/2026 09 AM PDT 7.22 645 0 Normal
09/23/2026 10 AM PDT 7.20 636 - Normal
09/23/2026 11 AM PDT 7.21 640 + Normal
09/23/2026 12 PM PDT 7.21 640 0 Normal
09/23/2026 01 PM PDT 7.19 631 - Normal
09/23/2026 02 PM PDT 7.21 640 + Normal
09/23/2026 03 PM PDT 7.21 640 0 Normal
09/23/2026 04 PM PDT 7.19 631 - Normal
09/23/2026 05 PM PDT 7.17 623 - Normal
09/23/2026 06 PM PDT 7.15 614 - Normal
09/23/2026 07 PM PDT 7.14 609 - Normal
09/23/2026 08 PM PDT 7.12 601 - Normal
09/23/2026 09 PM PDT 7.12 601 0 Normal
09/23/2026 10 PM PDT 7.11 596 - Normal
09/23/2026 11 PM PDT 7.10 592 - Normal
09/24/2026 12 AM PDT 7.10 592 0 Normal
09/24/2026 01 AM PDT 7.10 592 0 Normal
09/24/2026 02 AM PDT 7.09 588 - Normal
09/24/2026 03 AM PDT 7.09 588 0 Normal
09/24/2026 04 AM PDT 7.09 588 0 Normal
09/24/2026 05 AM PDT 7.10 592 + Normal
09/24/2026 06 AM PDT 7.09 588 - Normal
09/24/2026 07 AM PDT 7.09 588 0 Normal
09/24/2026 08 AM PDT 7.09 588 0 Normal
09/24/2026 09 AM PDT 7.09 588 0 Normal
09/24/2026 10 AM PDT 7.09 588 0 Normal
09/24/2026 11 AM PDT 7.10 592 + Normal
09/24/2026 12 PM PDT 7.09 588 - Normal
09/24/2026 01 PM PDT 7.05 571 - Normal
09/24/2026 02 PM PDT 7.09 588 + Normal
09/24/2026 03 PM PDT 7.08 583 - Normal
09/24/2026 04 PM PDT 7.04 566 - Normal
09/24/2026 05 PM PDT 7.04 566 0 Normal
09/24/2026 06 PM PDT 7.03 562 - Normal
09/24/2026 07 PM PDT 6.99 545 - Normal
09/24/2026 08 PM PDT 7.01 554 + Normal
09/24/2026 09 PM PDT 7.01 554 0 Normal
09/24/2026 10 PM PDT 7.01 554 0 Normal
09/24/2026 11 PM PDT 6.99 545 - Normal
09/25/2026 12 AM PDT 7.03 562 + Normal
09/25/2026 01 AM PDT 7.04 566 + Normal
09/25/2026 02 AM PDT 7.01 554 - Normal
09/25/2026 03 AM PDT 7.02 558 + Normal
09/25/2026 04 AM PDT 7.05 571 + Normal
09/25/2026 05 AM PDT 7.03 562 - Normal
09/25/2026 06 AM PDT 7.06 575 + Normal
09/25/2026 07 AM PDT 7.06 575 0 Normal
09/25/2026 08 AM PDT 7.05 571 - Normal
09/25/2026 09 AM PDT 7.05 571 0 Normal
09/25/2026 10 AM PDT 7.05 571 0 Normal
09/25/2026 11 AM PDT 7.06 575 + Normal
09/25/2026 12 PM PDT 7.09 588 + Normal
09/25/2026 01 PM PDT 7.08 583 - Normal
09/25/2026 02 PM PDT 7.09 588 + Normal
09/25/2026 03 PM PDT 7.09 588 0 Normal
09/25/2026 04 PM PDT 7.09 588 0 Normal
09/25/2026 05 PM PDT 7.07 579 - Normal
09/25/2026 06 PM PDT 7.06 575 - Normal
09/25/2026 07 PM PDT 7.10 592 + Normal
09/25/2026 08 PM PDT 7.11 596 + Normal
09/25/2026 09 PM PDT 7.07 579 - Normal
09/25/2026 10 PM PDT 7.10 592 + Normal
09/25/2026 11 PM PDT 7.10 592 0 Normal
09/26/2026 12 AM PDT 7.13 605 + Normal
09/26/2026 01 AM PDT 7.13 605 0 Normal
09/26/2026 02 AM PDT 7.12 601 - Normal
09/26/2026 03 AM PDT 7.12 601 0 Normal
09/26/2026 04 AM PDT 7.12 601 0 Normal
09/26/2026 05 AM PDT 7.12 601 0 Normal
09/26/2026 06 AM PDT 7.12 601 0 Normal
09/26/2026 07 AM PDT 7.12 601 0 Normal
09/26/2026 08 AM PDT 7.12 601 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
09/26/2026 09 AM PDT 7.11 596 Normal
09/26/2026 10 AM PDT 7.11 596 0 Normal
09/26/2026 11 AM PDT 7.11 596 0 Normal
09/26/2026 12 PM PDT 7.11 596 0 Normal
09/26/2026 01 PM PDT 7.11 596 0 Normal
09/26/2026 02 PM PDT 7.12 601 + Normal
09/26/2026 03 PM PDT 7.12 601 0 Normal
09/26/2026 04 PM PDT 7.12 601 0 Normal
09/26/2026 05 PM PDT 7.12 601 0 Normal
09/26/2026 06 PM PDT 7.12 601 0 Normal
09/26/2026 07 PM PDT 7.12 601 0 Normal
09/26/2026 08 PM PDT 7.12 601 0 Normal
09/26/2026 09 PM PDT 7.12 601 0 Normal
09/26/2026 10 PM PDT 7.12 601 0 Normal
09/26/2026 11 PM PDT 7.13 605 + Normal
09/27/2026 12 AM PDT 7.13 605 0 Normal
09/27/2026 01 AM PDT 7.13 605 0 Normal
09/27/2026 02 AM PDT 7.13 605 0 Normal
09/27/2026 03 AM PDT 7.13 605 0 Normal
09/27/2026 04 AM PDT 7.13 605 0 Normal
09/27/2026 05 AM PDT 7.13 605 0 Normal
09/27/2026 06 AM PDT 7.14 609 + Normal
09/27/2026 07 AM PDT 7.14 609 0 Normal
09/27/2026 08 AM PDT 7.14 609 0 Normal
09/27/2026 09 AM PDT 7.14 609 0 Normal
09/27/2026 10 AM PDT 7.14 609 0 Normal
09/27/2026 11 AM PDT 7.14 609 0 Normal
09/27/2026 12 PM PDT 7.14 609 0 Normal
09/27/2026 01 PM PDT 7.14 609 0 Normal
09/27/2026 02 PM PDT 7.14 609 0 Normal
09/27/2026 03 PM PDT 7.14 609 0 Normal
09/27/2026 04 PM PDT 7.14 609 0 Normal
09/27/2026 05 PM PDT 7.14 609 0 Normal
09/27/2026 06 PM PDT 7.15 614 + Normal
09/27/2026 07 PM PDT 7.15 614 0 Normal
09/27/2026 08 PM PDT 7.15 614 0 Normal
09/27/2026 09 PM PDT 7.15 614 0 Normal
09/27/2026 10 PM PDT 7.15 614 0 Normal
09/27/2026 11 PM PDT 7.15 614 0 Normal
09/28/2026 12 AM PDT 7.15 614 0 Normal
09/28/2026 01 AM PDT 7.15 614 0 Normal
09/28/2026 02 AM PDT 7.15 614 0 Normal
09/28/2026 03 AM PDT 7.15 614 0 Normal
09/28/2026 04 AM PDT 7.15 614 0 Normal
09/28/2026 05 AM PDT 7.15 614 0 Normal
09/28/2026 06 AM PDT 7.15 614 0 Normal
09/28/2026 07 AM PDT 7.15 614 0 Normal
09/28/2026 08 AM PDT 7.15 614 0 Normal
09/28/2026 09 AM PDT 7.15 614 0 Normal
09/28/2026 10 AM PDT 7.15 614 0 Normal
09/28/2026 11 AM PDT 7.15 614 0 Normal
09/28/2026 12 PM PDT 7.15 614 0 Normal
09/28/2026 01 PM PDT 7.15 614 0 Normal
09/28/2026 02 PM PDT 7.15 614 0 Normal
09/28/2026 03 PM PDT 7.15 614 0 Normal
09/28/2026 04 PM PDT 7.15 614 0 Normal
09/28/2026 05 PM PDT 7.16 618 + Normal
09/28/2026 06 PM PDT 7.16 618 0 Normal
09/28/2026 07 PM PDT 7.16 618 0 Normal
09/28/2026 08 PM PDT 7.16 618 0 Normal
09/28/2026 09 PM PDT 7.16 618 0 Normal
09/28/2026 10 PM PDT 7.16 618 0 Normal
09/28/2026 11 PM PDT 7.16 618 0 Normal
09/29/2026 12 AM PDT 7.17 623 + Normal
09/29/2026 01 AM PDT 7.18 627 + Normal
09/29/2026 02 AM PDT 7.18 627 0 Normal
09/29/2026 03 AM PDT 7.20 636 + Normal
09/29/2026 04 AM PDT 7.21 640 + Normal
09/29/2026 05 AM PDT 7.22 645 + Normal
09/29/2026 06 AM PDT 7.24 654 + Normal
09/29/2026 07 AM PDT 7.26 663 + Normal
09/29/2026 08 AM PDT 7.28 672 + Normal
09/29/2026 09 AM PDT 7.30 681 + Normal
09/29/2026 10 AM PDT 7.32 690 + Normal
09/29/2026 11 AM PDT 7.34 700 + Normal
09/29/2026 12 PM PDT 7.37 714 + Normal
09/29/2026 01 PM PDT 7.39 723 + Normal
09/29/2026 02 PM PDT 7.41 733 + Normal
09/29/2026 03 PM PDT 7.44 747 + Normal
09/29/2026 04 PM PDT 7.46 756 + Normal
09/29/2026 05 PM PDT 7.48 766 + Normal
09/29/2026 06 PM PDT 7.50 776 + Normal
09/29/2026 07 PM PDT 7.53 790 + Normal
09/29/2026 08 PM PDT 7.55 800 + Normal
09/29/2026 09 PM PDT 7.57 810 + Normal
09/29/2026 10 PM PDT 7.59 820 + Normal
09/29/2026 11 PM PDT 7.61 830 + Normal
09/30/2026 12 AM PDT 7.62 835 + Normal
09/30/2026 01 AM PDT 7.64 845 + Normal
09/30/2026 02 AM PDT 7.66 855 + Normal
09/30/2026 03 AM PDT 7.68 865 + Normal
09/30/2026 04 AM PDT 7.69 870 + Normal
09/30/2026 05 AM PDT 7.71 881 + Normal
09/30/2026 06 AM PDT 7.72 886 + Normal
09/30/2026 07 AM PDT 7.74 896 + Normal
09/30/2026 08 AM PDT 7.75 901 + Normal
09/30/2026 09 AM PDT 7.76 906 + Normal
09/30/2026 10 AM PDT 7.77 912 + Normal
09/30/2026 11 AM PDT 7.78 917 + Normal
09/30/2026 12 PM PDT 7.79 922 + Normal
09/30/2026 01 PM PDT 7.80 927 + Normal
09/30/2026 02 PM PDT 7.81 933 + Normal
09/30/2026 03 PM PDT 7.82 938 + Normal
09/30/2026 04 PM PDT 7.83 943 + Normal
09/30/2026 05 PM PDT 7.84 948 + Normal
09/30/2026 06 PM PDT 7.85 954 + Normal
09/30/2026 07 PM PDT 7.86 959 + Normal
09/30/2026 08 PM PDT 7.86 959 0 Normal
09/30/2026 09 PM PDT 7.87 964 + Normal
09/30/2026 10 PM PDT 7.88 970 + Normal
09/30/2026 11 PM PDT 7.88 970 0 Normal
10/01/2026 12 AM PDT 7.89 975 + Normal
10/01/2026 01 AM PDT 7.89 975 0 Normal
10/01/2026 02 AM PDT 7.90 980 + Normal
10/01/2026 03 AM PDT 7.91 986 + Normal
10/01/2026 04 AM PDT 7.91 986 0 Normal
10/01/2026 05 AM PDT 7.91 986 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.
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