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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: | Jul 18 2026 at 8:09 AM PDT | Next Issuance: | Jul 19 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: 07/18/2026 at 08:09 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 07/13/2026 at 11:00 AM PDT
# Maximum Observed Stage: 7.37 Feet
# Maximum Observed Flow: 714 cfs
#
# Earliest Date & Time of Maximum Forecast: 07/18/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 6.92 Feet
# Maximum Forecast Flow: 516 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
07/13/2026 08 AM PDT 7.37 714 Normal
07/13/2026 09 AM PDT 7.37 714 0 Normal
07/13/2026 10 AM PDT 7.37 714 0 Normal
07/13/2026 11 AM PDT 7.37 714 0 Normal
07/13/2026 12 PM PDT 7.36 709 - Normal
07/13/2026 01 PM PDT 7.36 709 0 Normal
07/13/2026 02 PM PDT 7.34 700 - Normal
07/13/2026 03 PM PDT 7.31 686 - Normal
07/13/2026 04 PM PDT 7.31 686 0 Normal
07/13/2026 05 PM PDT 7.29 677 - Normal
07/13/2026 06 PM PDT 7.29 677 0 Normal
07/13/2026 07 PM PDT 7.27 667 - Normal
07/13/2026 08 PM PDT 7.22 645 - Normal
07/13/2026 09 PM PDT 7.23 649 + Normal
07/13/2026 10 PM PDT 7.22 645 - Normal
07/13/2026 11 PM PDT 7.21 640 - Normal
07/14/2026 12 AM PDT 7.20 636 - Normal
07/14/2026 01 AM PDT 7.19 631 - Normal
07/14/2026 02 AM PDT 7.18 627 - Normal
07/14/2026 03 AM PDT 7.17 623 - Normal
07/14/2026 04 AM PDT 7.17 623 0 Normal
07/14/2026 05 AM PDT 7.16 618 - Normal
07/14/2026 06 AM PDT 7.16 618 0 Normal
07/14/2026 07 AM PDT 7.16 618 0 Normal
07/14/2026 08 AM PDT 7.16 618 0 Normal
07/14/2026 09 AM PDT 7.16 618 0 Normal
07/14/2026 10 AM PDT 7.16 618 0 Normal
07/14/2026 11 AM PDT 7.15 614 - Normal
07/14/2026 12 PM PDT 7.15 614 0 Normal
07/14/2026 01 PM PDT 7.10 592 - Normal
07/14/2026 02 PM PDT 7.10 592 0 Normal
07/14/2026 03 PM PDT 7.09 588 - Normal
07/14/2026 04 PM PDT 7.08 583 - Normal
07/14/2026 05 PM PDT 7.08 583 0 Normal
07/14/2026 06 PM PDT 7.07 579 - Normal
07/14/2026 07 PM PDT 7.08 583 + Normal
07/14/2026 08 PM PDT 7.11 596 + Normal
07/14/2026 09 PM PDT 7.11 596 0 Normal
07/14/2026 10 PM PDT 7.10 592 - Normal
07/14/2026 11 PM PDT 7.10 592 0 Normal
07/15/2026 12 AM PDT 7.09 588 - Normal
07/15/2026 01 AM PDT 7.09 588 0 Normal
07/15/2026 02 AM PDT 7.10 592 + Normal
07/15/2026 03 AM PDT 7.10 592 0 Normal
07/15/2026 04 AM PDT 7.10 592 0 Normal
07/15/2026 05 AM PDT 7.11 596 + Normal
07/15/2026 06 AM PDT 7.12 601 + Normal
07/15/2026 07 AM PDT 7.12 601 0 Normal
07/15/2026 08 AM PDT 7.13 605 + Normal
07/15/2026 09 AM PDT 7.14 609 + Normal
07/15/2026 10 AM PDT 7.11 596 - Normal
07/15/2026 11 AM PDT 7.11 596 0 Normal
07/15/2026 12 PM PDT 7.11 596 0 Normal
07/15/2026 01 PM PDT 7.11 596 0 Normal
07/15/2026 02 PM PDT 7.12 601 + Normal
07/15/2026 03 PM PDT 7.11 596 - Normal
07/15/2026 04 PM PDT 7.12 601 + Normal
07/15/2026 05 PM PDT 7.11 596 - Normal
07/15/2026 06 PM PDT 7.11 596 0 Normal
07/15/2026 07 PM PDT 7.09 588 - Normal
07/15/2026 08 PM PDT 7.09 588 0 Normal
07/15/2026 09 PM PDT 7.07 579 - Normal
07/15/2026 10 PM PDT 7.06 575 - Normal
07/15/2026 11 PM PDT 7.06 575 0 Normal
07/16/2026 12 AM PDT 7.06 575 0 Normal
07/16/2026 01 AM PDT 7.06 575 0 Normal
07/16/2026 02 AM PDT 7.07 579 + Normal
07/16/2026 03 AM PDT 7.08 583 + Normal
07/16/2026 04 AM PDT 7.09 588 + Normal
07/16/2026 05 AM PDT 7.10 592 + Normal
07/16/2026 06 AM PDT 7.10 592 0 Normal
07/16/2026 07 AM PDT 7.11 596 + Normal
07/16/2026 08 AM PDT 7.11 596 0 Normal
07/16/2026 09 AM PDT 7.11 596 0 Normal
07/16/2026 10 AM PDT 7.07 579 - Normal
07/16/2026 11 AM PDT 7.03 562 - Normal
07/16/2026 12 PM PDT 7.01 554 - Normal
07/16/2026 01 PM PDT 6.99 545 - Normal
07/16/2026 02 PM PDT 6.96 533 - Normal
07/16/2026 03 PM PDT 6.95 529 - Normal
07/16/2026 04 PM PDT 6.95 529 0 Normal
07/16/2026 05 PM PDT 6.94 525 - Normal
07/16/2026 06 PM PDT 6.93 520 - Normal
07/16/2026 07 PM PDT 6.93 520 0 Normal
07/16/2026 08 PM PDT 6.93 520 0 Normal
07/16/2026 09 PM PDT 6.92 516 - Normal
07/16/2026 10 PM PDT 6.94 525 + Normal
07/16/2026 11 PM PDT 6.96 533 + Normal
07/17/2026 12 AM PDT 6.96 533 0 Normal
07/17/2026 01 AM PDT 6.96 533 0 Normal
07/17/2026 02 AM PDT 6.96 533 0 Normal
07/17/2026 03 AM PDT 6.97 537 + Normal
07/17/2026 04 AM PDT 6.98 541 + Normal
07/17/2026 05 AM PDT 6.99 545 + Normal
07/17/2026 06 AM PDT 7.01 554 + Normal
07/17/2026 07 AM PDT 7.03 562 + Normal
07/17/2026 08 AM PDT 7.03 562 0 Normal
07/17/2026 09 AM PDT 7.02 558 - Normal
07/17/2026 10 AM PDT 7.01 554 - Normal
07/17/2026 11 AM PDT 7.00 549 - Normal
07/17/2026 12 PM PDT 6.99 545 - Normal
07/17/2026 01 PM PDT 6.97 537 - Normal
07/17/2026 02 PM PDT 6.96 533 - Normal
07/17/2026 03 PM PDT 6.95 529 - Normal
07/17/2026 04 PM PDT 6.92 516 - Normal
07/17/2026 05 PM PDT 6.91 512 - Normal
07/17/2026 06 PM PDT 6.88 500 - Normal
07/17/2026 07 PM PDT 6.88 500 0 Normal
07/17/2026 08 PM PDT 6.88 500 0 Normal
07/17/2026 09 PM PDT 6.87 496 - Normal
07/17/2026 10 PM PDT 6.87 496 0 Normal
07/17/2026 11 PM PDT 6.88 500 + Normal
07/18/2026 12 AM PDT 6.89 504 + Normal
07/18/2026 01 AM PDT 6.89 504 0 Normal
07/18/2026 02 AM PDT 6.89 504 0 Normal
07/18/2026 03 AM PDT 6.90 508 + Normal
07/18/2026 04 AM PDT 6.90 508 0 Normal
07/18/2026 05 AM PDT 6.91 512 + Normal
07/18/2026 06 AM PDT 6.91 512 0 Normal
07/18/2026 07 AM PDT 6.91 512 0 Normal
07/18/2026 08 AM PDT 6.91 512 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
07/18/2026 09 AM PDT 6.92 516 Normal
07/18/2026 10 AM PDT 6.92 516 0 Normal
07/18/2026 11 AM PDT 6.92 516 0 Normal
07/18/2026 12 PM PDT 6.92 516 0 Normal
07/18/2026 01 PM PDT 6.92 516 0 Normal
07/18/2026 02 PM PDT 6.92 516 0 Normal
07/18/2026 03 PM PDT 6.92 516 0 Normal
07/18/2026 04 PM PDT 6.92 516 0 Normal
07/18/2026 05 PM PDT 6.92 516 0 Normal
07/18/2026 06 PM PDT 6.92 516 0 Normal
07/18/2026 07 PM PDT 6.92 516 0 Normal
07/18/2026 08 PM PDT 6.92 516 0 Normal
07/18/2026 09 PM PDT 6.92 516 0 Normal
07/18/2026 10 PM PDT 6.92 516 0 Normal
07/18/2026 11 PM PDT 6.92 516 0 Normal
07/19/2026 12 AM PDT 6.92 516 0 Normal
07/19/2026 01 AM PDT 6.92 516 0 Normal
07/19/2026 02 AM PDT 6.92 516 0 Normal
07/19/2026 03 AM PDT 6.91 512 - Normal
07/19/2026 04 AM PDT 6.91 512 0 Normal
07/19/2026 05 AM PDT 6.91 512 0 Normal
07/19/2026 06 AM PDT 6.91 512 0 Normal
07/19/2026 07 AM PDT 6.91 512 0 Normal
07/19/2026 08 AM PDT 6.91 512 0 Normal
07/19/2026 09 AM PDT 6.91 512 0 Normal
07/19/2026 10 AM PDT 6.90 508 - Normal
07/19/2026 11 AM PDT 6.90 508 0 Normal
07/19/2026 12 PM PDT 6.90 508 0 Normal
07/19/2026 01 PM PDT 6.90 508 0 Normal
07/19/2026 02 PM PDT 6.90 508 0 Normal
07/19/2026 03 PM PDT 6.90 508 0 Normal
07/19/2026 04 PM PDT 6.89 504 - Normal
07/19/2026 05 PM PDT 6.89 504 0 Normal
07/19/2026 06 PM PDT 6.89 504 0 Normal
07/19/2026 07 PM PDT 6.89 504 0 Normal
07/19/2026 08 PM PDT 6.89 504 0 Normal
07/19/2026 09 PM PDT 6.89 504 0 Normal
07/19/2026 10 PM PDT 6.89 504 0 Normal
07/19/2026 11 PM PDT 6.89 504 0 Normal
07/20/2026 12 AM PDT 6.89 504 0 Normal
07/20/2026 01 AM PDT 6.89 504 0 Normal
07/20/2026 02 AM PDT 6.88 500 - Normal
07/20/2026 03 AM PDT 6.88 500 0 Normal
07/20/2026 04 AM PDT 6.88 500 0 Normal
07/20/2026 05 AM PDT 6.88 500 0 Normal
07/20/2026 06 AM PDT 6.88 500 0 Normal
07/20/2026 07 AM PDT 6.88 500 0 Normal
07/20/2026 08 AM PDT 6.88 500 0 Normal
07/20/2026 09 AM PDT 6.88 500 0 Normal
07/20/2026 10 AM PDT 6.88 500 0 Normal
07/20/2026 11 AM PDT 6.88 500 0 Normal
07/20/2026 12 PM PDT 6.88 500 0 Normal
07/20/2026 01 PM PDT 6.88 500 0 Normal
07/20/2026 02 PM PDT 6.88 500 0 Normal
07/20/2026 03 PM PDT 6.88 500 0 Normal
07/20/2026 04 PM PDT 6.88 500 0 Normal
07/20/2026 05 PM PDT 6.88 500 0 Normal
07/20/2026 06 PM PDT 6.88 500 0 Normal
07/20/2026 07 PM PDT 6.88 500 0 Normal
07/20/2026 08 PM PDT 6.89 504 + Normal
07/20/2026 09 PM PDT 6.89 504 0 Normal
07/20/2026 10 PM PDT 6.89 504 0 Normal
07/20/2026 11 PM PDT 6.89 504 0 Normal
07/21/2026 12 AM PDT 6.89 504 0 Normal
07/21/2026 01 AM PDT 6.89 504 0 Normal
07/21/2026 02 AM PDT 6.89 504 0 Normal
07/21/2026 03 AM PDT 6.89 504 0 Normal
07/21/2026 04 AM PDT 6.89 504 0 Normal
07/21/2026 05 AM PDT 6.89 504 0 Normal
07/21/2026 06 AM PDT 6.89 504 0 Normal
07/21/2026 07 AM PDT 6.89 504 0 Normal
07/21/2026 08 AM PDT 6.89 504 0 Normal
07/21/2026 09 AM PDT 6.89 504 0 Normal
07/21/2026 10 AM PDT 6.89 504 0 Normal
07/21/2026 11 AM PDT 6.89 504 0 Normal
07/21/2026 12 PM PDT 6.89 504 0 Normal
07/21/2026 01 PM PDT 6.89 504 0 Normal
07/21/2026 02 PM PDT 6.90 508 + Normal
07/21/2026 03 PM PDT 6.90 508 0 Normal
07/21/2026 04 PM PDT 6.90 508 0 Normal
07/21/2026 05 PM PDT 6.90 508 0 Normal
07/21/2026 06 PM PDT 6.90 508 0 Normal
07/21/2026 07 PM PDT 6.90 508 0 Normal
07/21/2026 08 PM PDT 6.90 508 0 Normal
07/21/2026 09 PM PDT 6.90 508 0 Normal
07/21/2026 10 PM PDT 6.90 508 0 Normal
07/21/2026 11 PM PDT 6.90 508 0 Normal
07/22/2026 12 AM PDT 6.90 508 0 Normal
07/22/2026 01 AM PDT 6.90 508 0 Normal
07/22/2026 02 AM PDT 6.90 508 0 Normal
07/22/2026 03 AM PDT 6.90 508 0 Normal
07/22/2026 04 AM PDT 6.91 512 + Normal
07/22/2026 05 AM PDT 6.91 512 0 Normal
07/22/2026 06 AM PDT 6.91 512 0 Normal
07/22/2026 07 AM PDT 6.91 512 0 Normal
07/22/2026 08 AM PDT 6.91 512 0 Normal
07/22/2026 09 AM PDT 6.91 512 0 Normal
07/22/2026 10 AM PDT 6.91 512 0 Normal
07/22/2026 11 AM PDT 6.91 512 0 Normal
07/22/2026 12 PM PDT 6.91 512 0 Normal
07/22/2026 01 PM PDT 6.91 512 0 Normal
07/22/2026 02 PM PDT 6.91 512 0 Normal
07/22/2026 03 PM PDT 6.91 512 0 Normal
07/22/2026 04 PM PDT 6.91 512 0 Normal
07/22/2026 05 PM PDT 6.91 512 0 Normal
07/22/2026 06 PM PDT 6.91 512 0 Normal
07/22/2026 07 PM PDT 6.91 512 0 Normal
07/22/2026 08 PM PDT 6.91 512 0 Normal
07/22/2026 09 PM PDT 6.91 512 0 Normal
07/22/2026 10 PM PDT 6.91 512 0 Normal
07/22/2026 11 PM PDT 6.91 512 0 Normal
07/23/2026 12 AM PDT 6.91 512 0 Normal
07/23/2026 01 AM PDT 6.92 516 + Normal
07/23/2026 02 AM PDT 6.92 516 0 Normal
07/23/2026 03 AM PDT 6.92 516 0 Normal
07/23/2026 04 AM PDT 6.92 516 0 Normal
07/23/2026 05 AM PDT 6.92 516 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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