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: Mar 26 2026 at 7:20 AM PDTNext Issuance: Mar 26 2026 at 3:00 PM 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:  03/26/2026 at 07:20 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/21/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       11.47 Feet
# Maximum Observed Flow:                        3618 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/26/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       9.80 Feet
# Maximum Forecast Flow:                        2218 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/21/2026 07 AM PDT           11.47           3618                        Normal
  03/21/2026 08 AM PDT           11.47           3618         0              Normal
  03/21/2026 09 AM PDT           11.45           3600         -              Normal
  03/21/2026 10 AM PDT           11.45           3600         0              Normal
  03/21/2026 11 AM PDT           11.44           3592         -              Normal
  03/21/2026 12 PM PDT           11.43           3583         -              Normal
  03/21/2026 01 PM PDT           11.42           3574         -              Normal
  03/21/2026 02 PM PDT           11.42           3574         0              Normal
  03/21/2026 03 PM PDT           11.39           3547         -              Normal
  03/21/2026 04 PM PDT           11.37           3530         -              Normal
  03/21/2026 05 PM PDT           11.35           3512         -              Normal
  03/21/2026 06 PM PDT           11.34           3504         -              Normal
  03/21/2026 07 PM PDT           11.34           3504         0              Normal
  03/21/2026 08 PM PDT           11.32           3486         -              Normal
  03/21/2026 09 PM PDT           11.29           3460         -              Normal
  03/21/2026 10 PM PDT           11.28           3451         -              Normal
  03/21/2026 11 PM PDT           11.28           3451         0              Normal
  03/22/2026 12 AM PDT           11.26           3434         -              Normal
  03/22/2026 01 AM PDT           11.23           3408         -              Normal
  03/22/2026 02 AM PDT           11.24           3417         +              Normal
  03/22/2026 03 AM PDT           11.23           3408         -              Normal
  03/22/2026 04 AM PDT           11.22           3399         -              Normal
  03/22/2026 05 AM PDT           11.21           3391         -              Normal
  03/22/2026 06 AM PDT           11.20           3382         -              Normal
  03/22/2026 07 AM PDT           11.20           3382         0              Normal
  03/22/2026 08 AM PDT           11.18           3365         -              Normal
  03/22/2026 09 AM PDT           11.16           3348         -              Normal
  03/22/2026 10 AM PDT           11.15           3339         -              Normal
  03/22/2026 11 AM PDT           11.15           3339         0              Normal
  03/22/2026 12 PM PDT           11.12           3313         -              Normal
  03/22/2026 01 PM PDT           11.12           3313         0              Normal
  03/22/2026 02 PM PDT           11.11           3305         -              Normal
  03/22/2026 03 PM PDT           11.12           3313         +              Normal
  03/22/2026 04 PM PDT           11.11           3305         -              Normal
  03/22/2026 05 PM PDT           11.09           3288         -              Normal
  03/22/2026 06 PM PDT           11.08           3279         -              Normal
  03/22/2026 07 PM PDT           11.09           3288         +              Normal
  03/22/2026 08 PM PDT           11.07           3270         -              Normal
  03/22/2026 09 PM PDT           11.05           3253         -              Normal
  03/22/2026 10 PM PDT           11.04           3245         -              Normal
  03/22/2026 11 PM PDT           11.03           3236         -              Normal
  03/23/2026 12 AM PDT           11.01           3219         -              Normal
  03/23/2026 01 AM PDT           11.00           3210         -              Normal
  03/23/2026 02 AM PDT           11.00           3210         0              Normal
  03/23/2026 03 AM PDT           10.99           3201         -              Normal
  03/23/2026 04 AM PDT           10.97           3184         -              Normal
  03/23/2026 05 AM PDT           10.97           3184         0              Normal
  03/23/2026 06 AM PDT           10.96           3175         -              Normal
  03/23/2026 07 AM PDT           10.95           3166         -              Normal
  03/23/2026 08 AM PDT           10.92           3139         -              Normal
  03/23/2026 09 AM PDT           10.92           3139         0              Normal
  03/23/2026 10 AM PDT           10.89           3113         -              Normal
  03/23/2026 11 AM PDT           10.88           3104         -              Normal
  03/23/2026 12 PM PDT           10.87           3095         -              Normal
  03/23/2026 01 PM PDT           10.83           3060         -              Normal
  03/23/2026 02 PM PDT           10.79           3025         -              Normal
  03/23/2026 03 PM PDT           10.78           3017         -              Normal
  03/23/2026 04 PM PDT           10.76           2999         -              Normal
  03/23/2026 05 PM PDT           10.73           2973         -              Normal
  03/23/2026 06 PM PDT           10.70           2948         -              Normal
  03/23/2026 07 PM PDT           10.70           2948         0              Normal
  03/23/2026 08 PM PDT           10.68           2930         -              Normal
  03/23/2026 09 PM PDT           10.66           2913         -              Normal
  03/23/2026 10 PM PDT           10.63           2888         -              Normal
  03/23/2026 11 PM PDT           10.62           2879         -              Normal
  03/24/2026 12 AM PDT           10.60           2862         -              Normal
  03/24/2026 01 AM PDT           10.57           2837         -              Normal
  03/24/2026 02 AM PDT           10.57           2837         0              Normal
  03/24/2026 03 AM PDT           10.54           2811         -              Normal
  03/24/2026 04 AM PDT           10.53           2803         -              Normal
  03/24/2026 05 AM PDT           10.51           2786         -              Normal
  03/24/2026 06 AM PDT           10.50           2778         -              Normal
  03/24/2026 07 AM PDT           10.49           2769         -              Normal
  03/24/2026 08 AM PDT           10.46           2744         -              Normal
  03/24/2026 09 AM PDT           10.44           2728         -              Normal
  03/24/2026 10 AM PDT           10.41           2703         -              Normal
  03/24/2026 11 AM PDT           10.38           2678         -              Normal
  03/24/2026 12 PM PDT           10.37           2670         -              Normal
  03/24/2026 01 PM PDT           10.36           2662         -              Normal
  03/24/2026 02 PM PDT           10.34           2645         -              Normal
  03/24/2026 03 PM PDT           10.32           2629         -              Normal
  03/24/2026 04 PM PDT           10.30           2612         -              Normal
  03/24/2026 05 PM PDT           10.31           2621         +              Normal
  03/24/2026 06 PM PDT           10.29           2604         -              Normal
  03/24/2026 07 PM PDT           10.30           2612         +              Normal
  03/24/2026 08 PM PDT           10.30           2612         0              Normal
  03/24/2026 09 PM PDT           10.28           2596         -              Normal
  03/24/2026 10 PM PDT           10.26           2580         -              Normal
  03/24/2026 11 PM PDT           10.23           2556         -              Normal
  03/25/2026 12 AM PDT           10.19           2523         -              Normal
  03/25/2026 01 AM PDT           10.20           2531         +              Normal
  03/25/2026 02 AM PDT           10.18           2515         -              Normal
  03/25/2026 03 AM PDT           10.16           2499         -              Normal
  03/25/2026 04 AM PDT           10.15           2491         -              Normal
  03/25/2026 05 AM PDT           10.14           2483         -              Normal
  03/25/2026 06 AM PDT           10.13           2475         -              Normal
  03/25/2026 07 AM PDT           10.12           2467         -              Normal
  03/25/2026 08 AM PDT           10.11           2459         -              Normal
  03/25/2026 09 AM PDT           10.10           2451         -              Normal
  03/25/2026 10 AM PDT           10.08           2436         -              Normal
  03/25/2026 11 AM PDT           10.07           2428         -              Normal
  03/25/2026 12 PM PDT           10.02           2388         -              Normal
  03/25/2026 01 PM PDT           10.01           2380         -              Normal
  03/25/2026 02 PM PDT            9.99           2365         -              Normal
  03/25/2026 03 PM PDT            9.98           2357         -              Normal
  03/25/2026 04 PM PDT            9.97           2349         -              Normal
  03/25/2026 05 PM PDT            9.95           2333         -              Normal
  03/25/2026 06 PM PDT            9.96           2341         +              Normal
  03/25/2026 07 PM PDT            9.95           2333         -              Normal
  03/25/2026 08 PM PDT            9.92           2310         -              Normal
  03/25/2026 09 PM PDT            9.91           2302         -              Normal
  03/25/2026 10 PM PDT            9.90           2295         -              Normal
  03/25/2026 11 PM PDT            9.90           2295         0              Normal
  03/26/2026 12 AM PDT            9.87           2272         -              Normal
  03/26/2026 01 AM PDT            9.87           2272         0              Normal
  03/26/2026 02 AM PDT            9.86           2264         -              Normal
  03/26/2026 03 AM PDT            9.85           2256         -              Normal
  03/26/2026 04 AM PDT            9.84           2249         -              Normal
  03/26/2026 05 AM PDT            9.83           2241         -              Normal
  03/26/2026 06 AM PDT            9.82           2233         -              Normal
  03/26/2026 07 AM PDT            9.81           2226         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/26/2026 08 AM PDT            9.80           2218                        Normal
  03/26/2026 09 AM PDT            9.79           2210         -              Normal
  03/26/2026 10 AM PDT            9.78           2203         -              Normal
  03/26/2026 11 AM PDT            9.77           2195         -              Normal
  03/26/2026 12 PM PDT            9.76           2188         -              Normal
  03/26/2026 01 PM PDT            9.75           2180         -              Normal
  03/26/2026 02 PM PDT            9.73           2165         -              Normal
  03/26/2026 03 PM PDT            9.72           2158         -              Normal
  03/26/2026 04 PM PDT            9.71           2150         -              Normal
  03/26/2026 05 PM PDT            9.71           2150         0              Normal
  03/26/2026 06 PM PDT            9.70           2143         -              Normal
  03/26/2026 07 PM PDT            9.69           2135         -              Normal
  03/26/2026 08 PM PDT            9.68           2128         -              Normal
  03/26/2026 09 PM PDT            9.67           2120         -              Normal
  03/26/2026 10 PM PDT            9.66           2113         -              Normal
  03/26/2026 11 PM PDT            9.65           2105         -              Normal
  03/27/2026 12 AM PDT            9.64           2098         -              Normal
  03/27/2026 01 AM PDT            9.63           2090         -              Normal
  03/27/2026 02 AM PDT            9.62           2083         -              Normal
  03/27/2026 03 AM PDT            9.62           2083         0              Normal
  03/27/2026 04 AM PDT            9.61           2076         -              Normal
  03/27/2026 05 AM PDT            9.60           2068         -              Normal
  03/27/2026 06 AM PDT            9.59           2061         -              Normal
  03/27/2026 07 AM PDT            9.59           2061         0              Normal
  03/27/2026 08 AM PDT            9.58           2053         -              Normal
  03/27/2026 09 AM PDT            9.57           2046         -              Normal
  03/27/2026 10 AM PDT            9.57           2046         0              Normal
  03/27/2026 11 AM PDT            9.56           2039         -              Normal
  03/27/2026 12 PM PDT            9.55           2031         -              Normal
  03/27/2026 01 PM PDT            9.55           2031         0              Normal
  03/27/2026 02 PM PDT            9.54           2024         -              Normal
  03/27/2026 03 PM PDT            9.53           2017         -              Normal
  03/27/2026 04 PM PDT            9.53           2017         0              Normal
  03/27/2026 05 PM PDT            9.52           2009         -              Normal
  03/27/2026 06 PM PDT            9.51           2002         -              Normal
  03/27/2026 07 PM PDT            9.50           1995         -              Normal
  03/27/2026 08 PM PDT            9.50           1995         0              Normal
  03/27/2026 09 PM PDT            9.49           1988         -              Normal
  03/27/2026 10 PM PDT            9.48           1980         -              Normal
  03/27/2026 11 PM PDT            9.47           1973         -              Normal
  03/28/2026 12 AM PDT            9.47           1973         0              Normal
  03/28/2026 01 AM PDT            9.46           1966         -              Normal
  03/28/2026 02 AM PDT            9.46           1966         0              Normal
  03/28/2026 03 AM PDT            9.45           1959         -              Normal
  03/28/2026 04 AM PDT            9.44           1951         -              Normal
  03/28/2026 05 AM PDT            9.44           1951         0              Normal
  03/28/2026 06 AM PDT            9.43           1944         -              Normal
  03/28/2026 07 AM PDT            9.43           1944         0              Normal
  03/28/2026 08 AM PDT            9.42           1937         -              Normal
  03/28/2026 09 AM PDT            9.42           1937         0              Normal
  03/28/2026 10 AM PDT            9.41           1930         -              Normal
  03/28/2026 11 AM PDT            9.41           1930         0              Normal
  03/28/2026 12 PM PDT            9.40           1923         -              Normal
  03/28/2026 01 PM PDT            9.40           1923         0              Normal
  03/28/2026 02 PM PDT            9.39           1916         -              Normal
  03/28/2026 03 PM PDT            9.39           1916         0              Normal
  03/28/2026 04 PM PDT            9.38           1908         -              Normal
  03/28/2026 05 PM PDT            9.38           1908         0              Normal
  03/28/2026 06 PM PDT            9.37           1901         -              Normal
  03/28/2026 07 PM PDT            9.37           1901         0              Normal
  03/28/2026 08 PM PDT            9.36           1894         -              Normal
  03/28/2026 09 PM PDT            9.36           1894         0              Normal
  03/28/2026 10 PM PDT            9.35           1887         -              Normal
  03/28/2026 11 PM PDT            9.35           1887         0              Normal
  03/29/2026 12 AM PDT            9.34           1880         -              Normal
  03/29/2026 01 AM PDT            9.34           1880         0              Normal
  03/29/2026 02 AM PDT            9.33           1873         -              Normal
  03/29/2026 03 AM PDT            9.33           1873         0              Normal
  03/29/2026 04 AM PDT            9.33           1873         0              Normal
  03/29/2026 05 AM PDT            9.32           1866         -              Normal
  03/29/2026 06 AM PDT            9.32           1866         0              Normal
  03/29/2026 07 AM PDT            9.32           1866         0              Normal
  03/29/2026 08 AM PDT            9.31           1859         -              Normal
  03/29/2026 09 AM PDT            9.31           1859         0              Normal
  03/29/2026 10 AM PDT            9.31           1859         0              Normal
  03/29/2026 11 AM PDT            9.30           1852         -              Normal
  03/29/2026 12 PM PDT            9.30           1852         0              Normal
  03/29/2026 01 PM PDT            9.30           1852         0              Normal
  03/29/2026 02 PM PDT            9.30           1852         0              Normal
  03/29/2026 03 PM PDT            9.30           1852         0              Normal
  03/29/2026 04 PM PDT            9.29           1845         -              Normal
  03/29/2026 05 PM PDT            9.29           1845         0              Normal
  03/29/2026 06 PM PDT            9.29           1845         0              Normal
  03/29/2026 07 PM PDT            9.29           1845         0              Normal
  03/29/2026 08 PM PDT            9.29           1845         0              Normal
  03/29/2026 09 PM PDT            9.29           1845         0              Normal
  03/29/2026 10 PM PDT            9.29           1845         0              Normal
  03/29/2026 11 PM PDT            9.28           1838         -              Normal
  03/30/2026 12 AM PDT            9.28           1838         0              Normal
  03/30/2026 01 AM PDT            9.28           1838         0              Normal
  03/30/2026 02 AM PDT            9.28           1838         0              Normal
  03/30/2026 03 AM PDT            9.28           1838         0              Normal
  03/30/2026 04 AM PDT            9.28           1838         0              Normal
  03/30/2026 05 AM PDT            9.28           1838         0              Normal
  03/30/2026 06 AM PDT            9.28           1838         0              Normal
  03/30/2026 07 AM PDT            9.28           1838         0              Normal
  03/30/2026 08 AM PDT            9.28           1838         0              Normal
  03/30/2026 09 AM PDT            9.28           1838         0              Normal
  03/30/2026 10 AM PDT            9.28           1838         0              Normal
  03/30/2026 11 AM PDT            9.28           1838         0              Normal
  03/30/2026 12 PM PDT            9.28           1838         0              Normal
  03/30/2026 01 PM PDT            9.28           1838         0              Normal
  03/30/2026 02 PM PDT            9.28           1838         0              Normal
  03/30/2026 03 PM PDT            9.28           1838         0              Normal
  03/30/2026 04 PM PDT            9.28           1838         0              Normal
  03/30/2026 05 PM PDT            9.28           1838         0              Normal
  03/30/2026 06 PM PDT            9.28           1838         0              Normal
  03/30/2026 07 PM PDT            9.28           1838         0              Normal
  03/30/2026 08 PM PDT            9.28           1838         0              Normal
  03/30/2026 09 PM PDT            9.28           1838         0              Normal
  03/30/2026 10 PM PDT            9.28           1838         0              Normal
  03/30/2026 11 PM PDT            9.28           1838         0              Normal
  03/31/2026 12 AM PDT            9.28           1838         0              Normal
  03/31/2026 01 AM PDT            9.28           1838         0              Normal
  03/31/2026 02 AM PDT            9.28           1838         0              Normal
  03/31/2026 03 AM PDT            9.28           1838         0              Normal
  03/31/2026 04 AM PDT            9.28           1838         0              Normal
  03/31/2026 05 AM PDT            9.28           1838         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.