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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 20 2026 at 7:52 AM PDT | Next Issuance: | Apr 21 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: 04/20/2026 at 07:52 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/20/2026 at 07:00 AM PDT
# Maximum Observed Stage: 10.37 Feet
# Maximum Observed Flow: 2670 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/23/2026 at 06:00 AM PDT
# Maximum Forecast Stage: 10.96 Feet
# Maximum Forecast Flow: 3175 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/15/2026 07 AM PDT 9.85 2256 Normal
04/15/2026 08 AM PDT 9.85 2256 0 Normal
04/15/2026 09 AM PDT 9.84 2249 - Normal
04/15/2026 10 AM PDT 9.85 2256 + Normal
04/15/2026 11 AM PDT 9.84 2249 - Normal
04/15/2026 12 PM PDT 9.87 2272 + Normal
04/15/2026 01 PM PDT 9.89 2287 + Normal
04/15/2026 02 PM PDT 9.89 2287 0 Normal
04/15/2026 03 PM PDT 9.91 2302 + Normal
04/15/2026 04 PM PDT 9.89 2287 - Normal
04/15/2026 05 PM PDT 9.91 2302 + Normal
04/15/2026 06 PM PDT 9.91 2302 0 Normal
04/15/2026 07 PM PDT 9.94 2326 + Normal
04/15/2026 08 PM PDT 9.96 2341 + Normal
04/15/2026 09 PM PDT 9.98 2357 + Normal
04/15/2026 10 PM PDT 10.00 2373 + Normal
04/15/2026 11 PM PDT 10.00 2373 0 Normal
04/16/2026 12 AM PDT 10.00 2373 0 Normal
04/16/2026 01 AM PDT 10.00 2373 0 Normal
04/16/2026 02 AM PDT 10.01 2380 + Normal
04/16/2026 03 AM PDT 10.01 2380 0 Normal
04/16/2026 04 AM PDT 10.01 2380 0 Normal
04/16/2026 05 AM PDT 9.99 2365 - Normal
04/16/2026 06 AM PDT 9.98 2357 - Normal
04/16/2026 07 AM PDT 9.97 2349 - Normal
04/16/2026 08 AM PDT 9.95 2333 - Normal
04/16/2026 09 AM PDT 9.93 2318 - Normal
04/16/2026 10 AM PDT 9.93 2318 0 Normal
04/16/2026 11 AM PDT 9.92 2310 - Normal
04/16/2026 12 PM PDT 9.89 2287 - Normal
04/16/2026 01 PM PDT 9.87 2272 - Normal
04/16/2026 02 PM PDT 9.85 2256 - Normal
04/16/2026 03 PM PDT 9.84 2249 - Normal
04/16/2026 04 PM PDT 9.82 2233 - Normal
04/16/2026 05 PM PDT 9.79 2210 - Normal
04/16/2026 06 PM PDT 9.77 2195 - Normal
04/16/2026 07 PM PDT 9.75 2180 - Normal
04/16/2026 08 PM PDT 9.75 2180 0 Normal
04/16/2026 09 PM PDT 9.72 2158 - Normal
04/16/2026 10 PM PDT 9.72 2158 0 Normal
04/16/2026 11 PM PDT 9.71 2150 - Normal
04/17/2026 12 AM PDT 9.70 2143 - Normal
04/17/2026 01 AM PDT 9.68 2128 - Normal
04/17/2026 02 AM PDT 9.68 2128 0 Normal
04/17/2026 03 AM PDT 9.66 2113 - Normal
04/17/2026 04 AM PDT 9.67 2120 + Normal
04/17/2026 05 AM PDT 9.66 2113 - Normal
04/17/2026 06 AM PDT 9.67 2120 + Normal
04/17/2026 07 AM PDT 9.66 2113 - Normal
04/17/2026 08 AM PDT 9.65 2105 - Normal
04/17/2026 09 AM PDT 9.63 2090 - Normal
04/17/2026 10 AM PDT 9.62 2083 - Normal
04/17/2026 11 AM PDT 9.61 2076 - Normal
04/17/2026 12 PM PDT 9.61 2076 0 Normal
04/17/2026 01 PM PDT 9.60 2068 - Normal
04/17/2026 02 PM PDT 9.58 2053 - Normal
04/17/2026 03 PM PDT 9.57 2046 - Normal
04/17/2026 04 PM PDT 9.56 2039 - Normal
04/17/2026 05 PM PDT 9.56 2039 0 Normal
04/17/2026 06 PM PDT 9.54 2024 - Normal
04/17/2026 07 PM PDT 9.56 2039 + Normal
04/17/2026 08 PM PDT 9.56 2039 0 Normal
04/17/2026 09 PM PDT 9.56 2039 0 Normal
04/17/2026 10 PM PDT 9.55 2031 - Normal
04/17/2026 11 PM PDT 9.55 2031 0 Normal
04/18/2026 12 AM PDT 9.56 2039 + Normal
04/18/2026 01 AM PDT 9.56 2039 0 Normal
04/18/2026 02 AM PDT 9.56 2039 0 Normal
04/18/2026 03 AM PDT 9.57 2046 + Normal
04/18/2026 04 AM PDT 9.57 2046 0 Normal
04/18/2026 05 AM PDT 9.58 2053 + Normal
04/18/2026 06 AM PDT 9.59 2061 + Normal
04/18/2026 07 AM PDT 9.60 2068 + Normal
04/18/2026 08 AM PDT 9.60 2068 0 Normal
04/18/2026 09 AM PDT 9.61 2076 + Normal
04/18/2026 10 AM PDT 9.63 2090 + Normal
04/18/2026 11 AM PDT 9.66 2113 + Normal
04/18/2026 12 PM PDT 9.68 2128 + Normal
04/18/2026 01 PM PDT 9.69 2135 + Normal
04/18/2026 02 PM PDT 9.72 2158 + Normal
04/18/2026 03 PM PDT 9.74 2173 + Normal
04/18/2026 04 PM PDT 9.73 2165 - Normal
04/18/2026 05 PM PDT 9.78 2203 + Normal
04/18/2026 06 PM PDT 9.80 2218 + Normal
04/18/2026 07 PM PDT 9.83 2241 + Normal
04/18/2026 08 PM PDT 9.85 2256 + Normal
04/18/2026 09 PM PDT 9.87 2272 + Normal
04/18/2026 10 PM PDT 9.90 2295 + Normal
04/18/2026 11 PM PDT 9.92 2310 + Normal
04/19/2026 12 AM PDT 9.94 2326 + Normal
04/19/2026 01 AM PDT 9.96 2341 + Normal
04/19/2026 02 AM PDT 9.98 2357 + Normal
04/19/2026 03 AM PDT 10.00 2373 + Normal
04/19/2026 04 AM PDT 10.01 2380 + Normal
04/19/2026 05 AM PDT 10.03 2396 + Normal
04/19/2026 06 AM PDT 10.04 2404 + Normal
04/19/2026 07 AM PDT 10.05 2412 + Normal
04/19/2026 08 AM PDT 10.07 2428 + Normal
04/19/2026 09 AM PDT 10.09 2443 + Normal
04/19/2026 10 AM PDT 10.10 2451 + Normal
04/19/2026 11 AM PDT 10.12 2467 + Normal
04/19/2026 12 PM PDT 10.15 2491 + Normal
04/19/2026 01 PM PDT 10.16 2499 + Normal
04/19/2026 02 PM PDT 10.19 2523 + Normal
04/19/2026 03 PM PDT 10.18 2515 - Normal
04/19/2026 04 PM PDT 10.21 2539 + Normal
04/19/2026 05 PM PDT 10.23 2556 + Normal
04/19/2026 06 PM PDT 10.23 2556 0 Normal
04/19/2026 07 PM PDT 10.22 2547 - Normal
04/19/2026 08 PM PDT 10.26 2580 + Normal
04/19/2026 09 PM PDT 10.27 2588 + Normal
04/19/2026 10 PM PDT 10.29 2604 + Normal
04/19/2026 11 PM PDT 10.31 2621 + Normal
04/20/2026 12 AM PDT 10.33 2637 + Normal
04/20/2026 01 AM PDT 10.34 2645 + Normal
04/20/2026 02 AM PDT 10.35 2653 + Normal
04/20/2026 03 AM PDT 10.35 2653 0 Normal
04/20/2026 04 AM PDT 10.37 2670 + Normal
04/20/2026 05 AM PDT 10.37 2670 0 Normal
04/20/2026 06 AM PDT 10.37 2670 0 Normal
04/20/2026 07 AM PDT 10.37 2670 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/20/2026 08 AM PDT 10.37 2670 Normal
04/20/2026 09 AM PDT 10.37 2670 0 Normal
04/20/2026 10 AM PDT 10.37 2670 0 Normal
04/20/2026 11 AM PDT 10.37 2670 0 Normal
04/20/2026 12 PM PDT 10.36 2662 - Normal
04/20/2026 01 PM PDT 10.36 2662 0 Normal
04/20/2026 02 PM PDT 10.36 2662 0 Normal
04/20/2026 03 PM PDT 10.36 2662 0 Normal
04/20/2026 04 PM PDT 10.36 2662 0 Normal
04/20/2026 05 PM PDT 10.36 2662 0 Normal
04/20/2026 06 PM PDT 10.36 2662 0 Normal
04/20/2026 07 PM PDT 10.37 2670 + Normal
04/20/2026 08 PM PDT 10.37 2670 0 Normal
04/20/2026 09 PM PDT 10.38 2678 + Normal
04/20/2026 10 PM PDT 10.39 2686 + Normal
04/20/2026 11 PM PDT 10.40 2695 + Normal
04/21/2026 12 AM PDT 10.41 2703 + Normal
04/21/2026 01 AM PDT 10.42 2711 + Normal
04/21/2026 02 AM PDT 10.44 2728 + Normal
04/21/2026 03 AM PDT 10.45 2736 + Normal
04/21/2026 04 AM PDT 10.47 2753 + Normal
04/21/2026 05 AM PDT 10.48 2761 + Normal
04/21/2026 06 AM PDT 10.50 2778 + Normal
04/21/2026 07 AM PDT 10.52 2795 + Normal
04/21/2026 08 AM PDT 10.53 2803 + Normal
04/21/2026 09 AM PDT 10.55 2820 + Normal
04/21/2026 10 AM PDT 10.57 2837 + Normal
04/21/2026 11 AM PDT 10.58 2845 + Normal
04/21/2026 12 PM PDT 10.60 2862 + Normal
04/21/2026 01 PM PDT 10.62 2879 + Normal
04/21/2026 02 PM PDT 10.63 2888 + Normal
04/21/2026 03 PM PDT 10.65 2905 + Normal
04/21/2026 04 PM PDT 10.66 2913 + Normal
04/21/2026 05 PM PDT 10.68 2930 + Normal
04/21/2026 06 PM PDT 10.69 2939 + Normal
04/21/2026 07 PM PDT 10.71 2956 + Normal
04/21/2026 08 PM PDT 10.72 2965 + Normal
04/21/2026 09 PM PDT 10.73 2973 + Normal
04/21/2026 10 PM PDT 10.74 2982 + Normal
04/21/2026 11 PM PDT 10.75 2991 + Normal
04/22/2026 12 AM PDT 10.76 2999 + Normal
04/22/2026 01 AM PDT 10.77 3008 + Normal
04/22/2026 02 AM PDT 10.78 3017 + Normal
04/22/2026 03 AM PDT 10.79 3025 + Normal
04/22/2026 04 AM PDT 10.79 3025 0 Normal
04/22/2026 05 AM PDT 10.80 3034 + Normal
04/22/2026 06 AM PDT 10.80 3034 0 Normal
04/22/2026 07 AM PDT 10.81 3043 + Normal
04/22/2026 08 AM PDT 10.81 3043 0 Normal
04/22/2026 09 AM PDT 10.82 3052 + Normal
04/22/2026 10 AM PDT 10.82 3052 0 Normal
04/22/2026 11 AM PDT 10.83 3060 + Normal
04/22/2026 12 PM PDT 10.84 3069 + Normal
04/22/2026 01 PM PDT 10.84 3069 0 Normal
04/22/2026 02 PM PDT 10.85 3078 + Normal
04/22/2026 03 PM PDT 10.85 3078 0 Normal
04/22/2026 04 PM PDT 10.86 3087 + Normal
04/22/2026 05 PM PDT 10.87 3095 + Normal
04/22/2026 06 PM PDT 10.87 3095 0 Normal
04/22/2026 07 PM PDT 10.88 3104 + Normal
04/22/2026 08 PM PDT 10.88 3104 0 Normal
04/22/2026 09 PM PDT 10.89 3113 + Normal
04/22/2026 10 PM PDT 10.90 3122 + Normal
04/22/2026 11 PM PDT 10.91 3131 + Normal
04/23/2026 12 AM PDT 10.92 3139 + Normal
04/23/2026 01 AM PDT 10.93 3148 + Normal
04/23/2026 02 AM PDT 10.94 3157 + Normal
04/23/2026 03 AM PDT 10.94 3157 0 Normal
04/23/2026 04 AM PDT 10.95 3166 + Normal
04/23/2026 05 AM PDT 10.95 3166 0 Normal
04/23/2026 06 AM PDT 10.96 3175 + Normal
04/23/2026 07 AM PDT 10.96 3175 0 Normal
04/23/2026 08 AM PDT 10.96 3175 0 Normal
04/23/2026 09 AM PDT 10.96 3175 0 Normal
04/23/2026 10 AM PDT 10.96 3175 0 Normal
04/23/2026 11 AM PDT 10.95 3166 - Normal
04/23/2026 12 PM PDT 10.95 3166 0 Normal
04/23/2026 01 PM PDT 10.95 3166 0 Normal
04/23/2026 02 PM PDT 10.94 3157 - Normal
04/23/2026 03 PM PDT 10.94 3157 0 Normal
04/23/2026 04 PM PDT 10.93 3148 - Normal
04/23/2026 05 PM PDT 10.92 3139 - Normal
04/23/2026 06 PM PDT 10.92 3139 0 Normal
04/23/2026 07 PM PDT 10.91 3131 - Normal
04/23/2026 08 PM PDT 10.90 3122 - Normal
04/23/2026 09 PM PDT 10.90 3122 0 Normal
04/23/2026 10 PM PDT 10.89 3113 - Normal
04/23/2026 11 PM PDT 10.89 3113 0 Normal
04/24/2026 12 AM PDT 10.89 3113 0 Normal
04/24/2026 01 AM PDT 10.89 3113 0 Normal
04/24/2026 02 AM PDT 10.89 3113 0 Normal
04/24/2026 03 AM PDT 10.89 3113 0 Normal
04/24/2026 04 AM PDT 10.90 3122 + Normal
04/24/2026 05 AM PDT 10.90 3122 0 Normal
04/24/2026 06 AM PDT 10.90 3122 0 Normal
04/24/2026 07 AM PDT 10.90 3122 0 Normal
04/24/2026 08 AM PDT 10.89 3113 - Normal
04/24/2026 09 AM PDT 10.89 3113 0 Normal
04/24/2026 10 AM PDT 10.89 3113 0 Normal
04/24/2026 11 AM PDT 10.88 3104 - Normal
04/24/2026 12 PM PDT 10.88 3104 0 Normal
04/24/2026 01 PM PDT 10.87 3095 - Normal
04/24/2026 02 PM PDT 10.86 3087 - Normal
04/24/2026 03 PM PDT 10.85 3078 - Normal
04/24/2026 04 PM PDT 10.84 3069 - Normal
04/24/2026 05 PM PDT 10.84 3069 0 Normal
04/24/2026 06 PM PDT 10.83 3060 - Normal
04/24/2026 07 PM PDT 10.82 3052 - Normal
04/24/2026 08 PM PDT 10.81 3043 - Normal
04/24/2026 09 PM PDT 10.80 3034 - Normal
04/24/2026 10 PM PDT 10.79 3025 - Normal
04/24/2026 11 PM PDT 10.79 3025 0 Normal
04/25/2026 12 AM PDT 10.79 3025 0 Normal
04/25/2026 01 AM PDT 10.78 3017 - Normal
04/25/2026 02 AM PDT 10.78 3017 0 Normal
04/25/2026 03 AM PDT 10.79 3025 + Normal
04/25/2026 04 AM PDT 10.79 3025 0 Normal
04/25/2026 05 AM PDT 10.79 3025 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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