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 Feet
Location: San Joaquin County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Jan 21 2026 at 2:31 PM PSTNext Issuance: Jan 22 2026 at 9:00 AM PST
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:  01/21/2026 at 02:31 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  01/16/2026 at 02:00 PM PST
# Maximum Observed Stage:                       10.32 Feet
# Maximum Observed Flow:                        2612 cfs
#
# Earliest Date & Time of Maximum Forecast:     01/23/2026 at 05:00 AM PST
# Maximum Forecast Stage:                       10.31 Feet
# Maximum Forecast Flow:                        2604 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  01/16/2026 02 PM PST           10.32           2612                        Normal
  01/16/2026 03 PM PST           10.31           2604         -              Normal
  01/16/2026 04 PM PST           10.31           2604         0              Normal
  01/16/2026 05 PM PST           10.31           2604         0              Normal
  01/16/2026 06 PM PST           10.30           2596         -              Normal
  01/16/2026 07 PM PST           10.30           2596         0              Normal
  01/16/2026 08 PM PST           10.30           2596         0              Normal
  01/16/2026 09 PM PST           10.30           2596         0              Normal
  01/16/2026 10 PM PST           10.29           2588         -              Normal
  01/16/2026 11 PM PST           10.29           2588         0              Normal
  01/17/2026 12 AM PST           10.29           2588         0              Normal
  01/17/2026 01 AM PST           10.28           2580         -              Normal
  01/17/2026 02 AM PST           10.28           2580         0              Normal
  01/17/2026 03 AM PST           10.27           2572         -              Normal
  01/17/2026 04 AM PST           10.27           2572         0              Normal
  01/17/2026 05 AM PST           10.26           2564         -              Normal
  01/17/2026 06 AM PST           10.26           2564         0              Normal
  01/17/2026 07 AM PST           10.26           2564         0              Normal
  01/17/2026 08 AM PST           10.26           2564         0              Normal
  01/17/2026 09 AM PST           10.26           2564         0              Normal
  01/17/2026 10 AM PST           10.26           2564         0              Normal
  01/17/2026 11 AM PST           10.25           2556         -              Normal
  01/17/2026 12 PM PST           10.25           2556         0              Normal
  01/17/2026 01 PM PST           10.25           2556         0              Normal
  01/17/2026 02 PM PST           10.25           2556         0              Normal
  01/17/2026 03 PM PST           10.25           2556         0              Normal
  01/17/2026 04 PM PST           10.25           2556         0              Normal
  01/17/2026 05 PM PST           10.24           2547         -              Normal
  01/17/2026 06 PM PST           10.24           2547         0              Normal
  01/17/2026 07 PM PST           10.23           2539         -              Normal
  01/17/2026 08 PM PST           10.23           2539         0              Normal
  01/17/2026 09 PM PST           10.23           2539         0              Normal
  01/17/2026 10 PM PST           10.23           2539         0              Normal
  01/17/2026 11 PM PST           10.22           2531         -              Normal
  01/18/2026 12 AM PST           10.22           2531         0              Normal
  01/18/2026 01 AM PST           10.21           2523         -              Normal
  01/18/2026 02 AM PST           10.21           2523         0              Normal
  01/18/2026 03 AM PST           10.21           2523         0              Normal
  01/18/2026 04 AM PST           10.20           2515         -              Normal
  01/18/2026 05 AM PST           10.21           2523         +              Normal
  01/18/2026 06 AM PST           10.20           2515         -              Normal
  01/18/2026 07 AM PST           10.20           2515         0              Normal
  01/18/2026 08 AM PST           10.20           2515         0              Normal
  01/18/2026 09 AM PST           10.20           2515         0              Normal
  01/18/2026 10 AM PST           10.20           2515         0              Normal
  01/18/2026 11 AM PST           10.20           2515         0              Normal
  01/18/2026 12 PM PST           10.20           2515         0              Normal
  01/18/2026 01 PM PST           10.20           2515         0              Normal
  01/18/2026 02 PM PST           10.20           2515         0              Normal
  01/18/2026 03 PM PST           10.20           2515         0              Normal
  01/18/2026 04 PM PST           10.19           2507         -              Normal
  01/18/2026 05 PM PST           10.19           2507         0              Normal
  01/18/2026 06 PM PST           10.19           2507         0              Normal
  01/18/2026 07 PM PST           10.19           2507         0              Normal
  01/18/2026 08 PM PST           10.19           2507         0              Normal
  01/18/2026 09 PM PST           10.19           2507         0              Normal
  01/18/2026 10 PM PST           10.19           2507         0              Normal
  01/18/2026 11 PM PST           10.19           2507         0              Normal
  01/19/2026 12 AM PST           10.19           2507         0              Normal
  01/19/2026 01 AM PST           10.18           2499         -              Normal
  01/19/2026 02 AM PST           10.18           2499         0              Normal
  01/19/2026 03 AM PST           10.18           2499         0              Normal
  01/19/2026 04 AM PST           10.18           2499         0              Normal
  01/19/2026 05 AM PST           10.17           2491         -              Normal
  01/19/2026 06 AM PST           10.17           2491         0              Normal
  01/19/2026 07 AM PST           10.17           2491         0              Normal
  01/19/2026 08 AM PST           10.17           2491         0              Normal
  01/19/2026 09 AM PST           10.16           2483         -              Normal
  01/19/2026 10 AM PST           10.16           2483         0              Normal
  01/19/2026 11 AM PST           10.16           2483         0              Normal
  01/19/2026 12 PM PST           10.16           2483         0              Normal
  01/19/2026 01 PM PST           10.16           2483         0              Normal
  01/19/2026 02 PM PST           10.17           2491         +              Normal
  01/19/2026 03 PM PST           10.17           2491         0              Normal
  01/19/2026 04 PM PST           10.16           2483         -              Normal
  01/19/2026 05 PM PST           10.17           2491         +              Normal
  01/19/2026 06 PM PST           10.16           2483         -              Normal
  01/19/2026 07 PM PST           10.16           2483         0              Normal
  01/19/2026 08 PM PST           10.16           2483         0              Normal
  01/19/2026 09 PM PST           10.15           2475         -              Normal
  01/19/2026 10 PM PST           10.15           2475         0              Normal
  01/19/2026 11 PM PST           10.15           2475         0              Normal
  01/20/2026 12 AM PST           10.16           2483         +              Normal
  01/20/2026 01 AM PST           10.16           2483         0              Normal
  01/20/2026 02 AM PST           10.15           2475         -              Normal
  01/20/2026 03 AM PST           10.15           2475         0              Normal
  01/20/2026 04 AM PST           10.15           2475         0              Normal
  01/20/2026 05 AM PST           10.15           2475         0              Normal
  01/20/2026 06 AM PST           10.15           2475         0              Normal
  01/20/2026 07 AM PST           10.15           2475         0              Normal
  01/20/2026 08 AM PST           10.15           2475         0              Normal
  01/20/2026 09 AM PST           10.15           2475         0              Normal
  01/20/2026 10 AM PST           10.15           2475         0              Normal
  01/20/2026 11 AM PST           10.15           2475         0              Normal
  01/20/2026 12 PM PST           10.15           2475         0              Normal
  01/20/2026 01 PM PST           10.14           2467         -              Normal
  01/20/2026 02 PM PST           10.14           2467         0              Normal
  01/20/2026 03 PM PST           10.14           2467         0              Normal
  01/20/2026 04 PM PST           10.14           2467         0              Normal
  01/20/2026 05 PM PST           10.14           2467         0              Normal
  01/20/2026 06 PM PST           10.14           2467         0              Normal
  01/20/2026 07 PM PST           10.14           2467         0              Normal
  01/20/2026 08 PM PST           10.13           2459         -              Normal
  01/20/2026 09 PM PST           10.13           2459         0              Normal
  01/20/2026 10 PM PST           10.14           2467         +              Normal
  01/20/2026 11 PM PST           10.13           2459         -              Normal
  01/21/2026 12 AM PST           10.13           2459         0              Normal
  01/21/2026 01 AM PST           10.14           2467         +              Normal
  01/21/2026 02 AM PST           10.13           2459         -              Normal
  01/21/2026 03 AM PST           10.13           2459         0              Normal
  01/21/2026 04 AM PST           10.13           2459         0              Normal
  01/21/2026 05 AM PST           10.13           2459         0              Normal
  01/21/2026 06 AM PST           10.13           2459         0              Normal
  01/21/2026 07 AM PST           10.13           2459         0              Normal
  01/21/2026 08 AM PST           10.13           2459         0              Normal
  01/21/2026 09 AM PST           10.13           2459         0              Normal
  01/21/2026 10 AM PST           10.13           2459         0              Normal
  01/21/2026 11 AM PST           10.13           2459         0              Normal
  01/21/2026 12 PM PST           10.13           2459         0              Normal
  01/21/2026 01 PM PST           10.13           2459         0              Normal
  01/21/2026 02 PM PST           10.13           2459         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  01/21/2026 03 PM PST           10.13           2459                        Normal
  01/21/2026 04 PM PST           10.13           2459         0              Normal
  01/21/2026 05 PM PST           10.13           2459         0              Normal
  01/21/2026 06 PM PST           10.13           2459         0              Normal
  01/21/2026 07 PM PST           10.13           2459         0              Normal
  01/21/2026 08 PM PST           10.12           2451         -              Normal
  01/21/2026 09 PM PST           10.12           2451         0              Normal
  01/21/2026 10 PM PST           10.12           2451         0              Normal
  01/21/2026 11 PM PST           10.12           2451         0              Normal
  01/22/2026 12 AM PST           10.12           2451         0              Normal
  01/22/2026 01 AM PST           10.12           2451         0              Normal
  01/22/2026 02 AM PST           10.12           2451         0              Normal
  01/22/2026 03 AM PST           10.12           2451         0              Normal
  01/22/2026 04 AM PST           10.12           2451         0              Normal
  01/22/2026 05 AM PST           10.12           2451         0              Normal
  01/22/2026 06 AM PST           10.13           2459         +              Normal
  01/22/2026 07 AM PST           10.13           2459         0              Normal
  01/22/2026 08 AM PST           10.14           2467         +              Normal
  01/22/2026 09 AM PST           10.14           2467         0              Normal
  01/22/2026 10 AM PST           10.15           2475         +              Normal
  01/22/2026 11 AM PST           10.15           2475         0              Normal
  01/22/2026 12 PM PST           10.16           2483         +              Normal
  01/22/2026 01 PM PST           10.17           2491         +              Normal
  01/22/2026 02 PM PST           10.18           2499         +              Normal
  01/22/2026 03 PM PST           10.19           2507         +              Normal
  01/22/2026 04 PM PST           10.20           2515         +              Normal
  01/22/2026 05 PM PST           10.21           2523         +              Normal
  01/22/2026 06 PM PST           10.22           2531         +              Normal
  01/22/2026 07 PM PST           10.23           2539         +              Normal
  01/22/2026 08 PM PST           10.24           2547         +              Normal
  01/22/2026 09 PM PST           10.25           2556         +              Normal
  01/22/2026 10 PM PST           10.26           2564         +              Normal
  01/22/2026 11 PM PST           10.27           2572         +              Normal
  01/23/2026 12 AM PST           10.27           2572         0              Normal
  01/23/2026 01 AM PST           10.28           2580         +              Normal
  01/23/2026 02 AM PST           10.29           2588         +              Normal
  01/23/2026 03 AM PST           10.29           2588         0              Normal
  01/23/2026 04 AM PST           10.30           2596         +              Normal
  01/23/2026 05 AM PST           10.31           2604         +              Normal
  01/23/2026 06 AM PST           10.31           2604         0              Normal
  01/23/2026 07 AM PST           10.31           2604         0              Normal
  01/23/2026 08 AM PST           10.31           2604         0              Normal
  01/23/2026 09 AM PST           10.31           2604         0              Normal
  01/23/2026 10 AM PST           10.31           2604         0              Normal
  01/23/2026 11 AM PST           10.31           2604         0              Normal
  01/23/2026 12 PM PST           10.31           2604         0              Normal
  01/23/2026 01 PM PST           10.30           2596         -              Normal
  01/23/2026 02 PM PST           10.30           2596         0              Normal
  01/23/2026 03 PM PST           10.29           2588         -              Normal
  01/23/2026 04 PM PST           10.29           2588         0              Normal
  01/23/2026 05 PM PST           10.28           2580         -              Normal
  01/23/2026 06 PM PST           10.27           2572         -              Normal
  01/23/2026 07 PM PST           10.27           2572         0              Normal
  01/23/2026 08 PM PST           10.26           2564         -              Normal
  01/23/2026 09 PM PST           10.25           2556         -              Normal
  01/23/2026 10 PM PST           10.24           2547         -              Normal
  01/23/2026 11 PM PST           10.23           2539         -              Normal
  01/24/2026 12 AM PST           10.22           2531         -              Normal
  01/24/2026 01 AM PST           10.22           2531         0              Normal
  01/24/2026 02 AM PST           10.21           2523         -              Normal
  01/24/2026 03 AM PST           10.20           2515         -              Normal
  01/24/2026 04 AM PST           10.19           2507         -              Normal
  01/24/2026 05 AM PST           10.18           2499         -              Normal
  01/24/2026 06 AM PST           10.17           2491         -              Normal
  01/24/2026 07 AM PST           10.16           2483         -              Normal
  01/24/2026 08 AM PST           10.15           2475         -              Normal
  01/24/2026 09 AM PST           10.14           2467         -              Normal
  01/24/2026 10 AM PST           10.13           2459         -              Normal
  01/24/2026 11 AM PST           10.13           2459         0              Normal
  01/24/2026 12 PM PST           10.12           2451         -              Normal
  01/24/2026 01 PM PST           10.11           2443         -              Normal
  01/24/2026 02 PM PST           10.10           2436         -              Normal
  01/24/2026 03 PM PST           10.09           2428         -              Normal
  01/24/2026 04 PM PST           10.08           2420         -              Normal
  01/24/2026 05 PM PST           10.08           2420         0              Normal
  01/24/2026 06 PM PST           10.07           2412         -              Normal
  01/24/2026 07 PM PST           10.06           2404         -              Normal
  01/24/2026 08 PM PST           10.05           2396         -              Normal
  01/24/2026 09 PM PST           10.04           2388         -              Normal
  01/24/2026 10 PM PST           10.04           2388         0              Normal
  01/24/2026 11 PM PST           10.03           2380         -              Normal
  01/25/2026 12 AM PST           10.02           2373         -              Normal
  01/25/2026 01 AM PST           10.02           2373         0              Normal
  01/25/2026 02 AM PST           10.01           2365         -              Normal
  01/25/2026 03 AM PST           10.00           2357         -              Normal
  01/25/2026 04 AM PST           10.00           2357         0              Normal
  01/25/2026 05 AM PST            9.99           2349         -              Normal
  01/25/2026 06 AM PST            9.98           2341         -              Normal
  01/25/2026 07 AM PST            9.98           2341         0              Normal
  01/25/2026 08 AM PST            9.97           2333         -              Normal
  01/25/2026 09 AM PST            9.97           2333         0              Normal
  01/25/2026 10 AM PST            9.96           2326         -              Normal
  01/25/2026 11 AM PST            9.96           2326         0              Normal
  01/25/2026 12 PM PST            9.95           2318         -              Normal
  01/25/2026 01 PM PST            9.95           2318         0              Normal
  01/25/2026 02 PM PST            9.94           2310         -              Normal
  01/25/2026 03 PM PST            9.94           2310         0              Normal
  01/25/2026 04 PM PST            9.93           2302         -              Normal
  01/25/2026 05 PM PST            9.93           2302         0              Normal
  01/25/2026 06 PM PST            9.92           2295         -              Normal
  01/25/2026 07 PM PST            9.92           2295         0              Normal
  01/25/2026 08 PM PST            9.91           2287         -              Normal
  01/25/2026 09 PM PST            9.91           2287         0              Normal
  01/25/2026 10 PM PST            9.91           2287         0              Normal
  01/25/2026 11 PM PST            9.90           2279         -              Normal
  01/26/2026 12 AM PST            9.90           2279         0              Normal
  01/26/2026 01 AM PST            9.90           2279         0              Normal
  01/26/2026 02 AM PST            9.89           2272         -              Normal
  01/26/2026 03 AM PST            9.89           2272         0              Normal
  01/26/2026 04 AM PST            9.89           2272         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.