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SAN JOAQUIN RIVER - PATTERSON (PATC1)
| Latitude: 37.49º N | Longitude: 121.08º W | Elevation: 97 Feet | | Forecast Type: Official Location |
| Location: Stanislaus County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Aug 03 2026 at 7:48 AM PDT | Next Issuance: | Aug 04 2026 at 9:00 AM PDT
| |
| Action/Monitor: 48.0 Feet | Minor Flood: 54.7 Feet | Moderate Flood: 57.3 Feet | Major Flood: 58.3 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Patterson (PATC1)
#
# File Generation Time: 08/03/2026 at 07:48 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 08/03/2026 at 07:00 AM PDT
# Maximum Observed Stage: 32.08 Feet
# Maximum Observed Flow: 912 cfs
#
# Earliest Date & Time of Maximum Forecast: 08/03/2026 at 04:00 PM PDT
# Maximum Forecast Stage: 32.12 Feet
# Maximum Forecast Flow: 927 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
07/29/2026 07 AM PDT 31.43 685 Normal
07/29/2026 08 AM PDT 31.44 688 + Normal
07/29/2026 09 AM PDT 31.46 695 + Normal
07/29/2026 10 AM PDT 31.45 691 - Normal
07/29/2026 11 AM PDT 31.47 698 + Normal
07/29/2026 12 PM PDT 31.46 695 - Normal
07/29/2026 01 PM PDT 31.47 698 + Normal
07/29/2026 02 PM PDT 31.48 701 + Normal
07/29/2026 03 PM PDT 31.48 701 0 Normal
07/29/2026 04 PM PDT 31.49 705 + Normal
07/29/2026 05 PM PDT 31.49 705 0 Normal
07/29/2026 06 PM PDT 31.49 705 0 Normal
07/29/2026 07 PM PDT 31.48 701 - Normal
07/29/2026 08 PM PDT 31.48 701 0 Normal
07/29/2026 09 PM PDT 31.47 698 - Normal
07/29/2026 10 PM PDT 31.46 695 - Normal
07/29/2026 11 PM PDT 31.46 695 0 Normal
07/30/2026 12 AM PDT 31.45 691 - Normal
07/30/2026 01 AM PDT 31.44 688 - Normal
07/30/2026 02 AM PDT 31.43 685 - Normal
07/30/2026 03 AM PDT 31.42 682 - Normal
07/30/2026 04 AM PDT 31.42 682 0 Normal
07/30/2026 05 AM PDT 31.42 682 0 Normal
07/30/2026 06 AM PDT 31.43 685 + Normal
07/30/2026 07 AM PDT 31.42 682 - Normal
07/30/2026 08 AM PDT 31.45 691 + Normal
07/30/2026 09 AM PDT 31.44 688 - Normal
07/30/2026 10 AM PDT 31.42 682 - Normal
07/30/2026 11 AM PDT 31.42 682 0 Normal
07/30/2026 12 PM PDT 31.42 682 0 Normal
07/30/2026 01 PM PDT 31.45 691 + Normal
07/30/2026 02 PM PDT 31.47 698 + Normal
07/30/2026 03 PM PDT 31.48 701 + Normal
07/30/2026 04 PM PDT 31.49 705 + Normal
07/30/2026 05 PM PDT 31.50 708 + Normal
07/30/2026 06 PM PDT 31.52 715 + Normal
07/30/2026 07 PM PDT 31.51 711 - Normal
07/30/2026 08 PM PDT 31.52 715 + Normal
07/30/2026 09 PM PDT 31.53 718 + Normal
07/30/2026 10 PM PDT 31.53 718 0 Normal
07/30/2026 11 PM PDT 31.55 725 + Normal
07/31/2026 12 AM PDT 31.55 725 0 Normal
07/31/2026 01 AM PDT 31.56 728 + Normal
07/31/2026 02 AM PDT 31.57 731 + Normal
07/31/2026 03 AM PDT 31.58 735 + Normal
07/31/2026 04 AM PDT 31.58 735 0 Normal
07/31/2026 05 AM PDT 31.59 738 + Normal
07/31/2026 06 AM PDT 31.60 742 + Normal
07/31/2026 07 AM PDT 31.59 738 - Normal
07/31/2026 08 AM PDT 31.60 742 + Normal
07/31/2026 09 AM PDT 31.62 748 + Normal
07/31/2026 10 AM PDT 31.66 762 + Normal
07/31/2026 11 AM PDT 31.67 765 + Normal
07/31/2026 12 PM PDT 31.69 772 + Normal
07/31/2026 01 PM PDT 31.73 786 + Normal
07/31/2026 02 PM PDT 31.73 786 0 Normal
07/31/2026 03 PM PDT 31.73 786 0 Normal
07/31/2026 04 PM PDT 31.76 797 + Normal
07/31/2026 05 PM PDT 31.76 797 0 Normal
07/31/2026 06 PM PDT 31.78 804 + Normal
07/31/2026 07 PM PDT 31.78 804 0 Normal
07/31/2026 08 PM PDT 31.78 804 0 Normal
07/31/2026 09 PM PDT 31.77 800 - Normal
07/31/2026 10 PM PDT 31.74 790 - Normal
07/31/2026 11 PM PDT 31.78 804 + Normal
08/01/2026 12 AM PDT 31.74 790 - Normal
08/01/2026 01 AM PDT 31.73 786 - Normal
08/01/2026 02 AM PDT 31.75 793 + Normal
08/01/2026 03 AM PDT 31.74 790 - Normal
08/01/2026 04 AM PDT 31.70 776 - Normal
08/01/2026 05 AM PDT 31.70 776 0 Normal
08/01/2026 06 AM PDT 31.70 776 0 Normal
08/01/2026 07 AM PDT 31.67 765 - Normal
08/01/2026 08 AM PDT 31.66 762 - Normal
08/01/2026 09 AM PDT 31.66 762 0 Normal
08/01/2026 10 AM PDT 31.65 759 - Normal
08/01/2026 11 AM PDT 31.67 765 + Normal
08/01/2026 12 PM PDT 31.68 769 + Normal
08/01/2026 01 PM PDT 31.69 772 + Normal
08/01/2026 02 PM PDT 31.71 779 + Normal
08/01/2026 03 PM PDT 31.70 776 - Normal
08/01/2026 04 PM PDT 31.70 776 0 Normal
08/01/2026 05 PM PDT 31.70 776 0 Normal
08/01/2026 06 PM PDT 31.73 786 + Normal
08/01/2026 07 PM PDT 31.70 776 - Normal
08/01/2026 08 PM PDT 31.72 783 + Normal
08/01/2026 09 PM PDT 31.75 793 + Normal
08/01/2026 10 PM PDT 31.73 786 - Normal
08/01/2026 11 PM PDT 31.74 790 + Normal
08/02/2026 12 AM PDT 31.77 800 + Normal
08/02/2026 01 AM PDT 31.75 793 - Normal
08/02/2026 02 AM PDT 31.78 804 + Normal
08/02/2026 03 AM PDT 31.79 807 + Normal
08/02/2026 04 AM PDT 31.79 807 0 Normal
08/02/2026 05 AM PDT 31.81 814 + Normal
08/02/2026 06 AM PDT 31.83 821 + Normal
08/02/2026 07 AM PDT 31.84 825 + Normal
08/02/2026 08 AM PDT 31.86 832 + Normal
08/02/2026 09 AM PDT 31.91 850 + Normal
08/02/2026 10 AM PDT 31.94 861 + Normal
08/02/2026 11 AM PDT 31.96 868 + Normal
08/02/2026 12 PM PDT 31.98 875 + Normal
08/02/2026 01 PM PDT 32.00 883 + Normal
08/02/2026 02 PM PDT 32.01 886 + Normal
08/02/2026 03 PM PDT 32.02 890 + Normal
08/02/2026 04 PM PDT 32.04 897 + Normal
08/02/2026 05 PM PDT 32.05 901 + Normal
08/02/2026 06 PM PDT 32.05 901 0 Normal
08/02/2026 07 PM PDT 32.06 905 + Normal
08/02/2026 08 PM PDT 32.06 905 0 Normal
08/02/2026 09 PM PDT 32.08 912 + Normal
08/02/2026 10 PM PDT 32.07 908 - Normal
08/02/2026 11 PM PDT 32.06 905 - Normal
08/03/2026 12 AM PDT 32.08 912 + Normal
08/03/2026 01 AM PDT 32.06 905 - Normal
08/03/2026 02 AM PDT 32.05 901 - Normal
08/03/2026 03 AM PDT 32.06 905 + Normal
08/03/2026 04 AM PDT 32.06 905 0 Normal
08/03/2026 05 AM PDT 32.04 897 - Normal
08/03/2026 06 AM PDT 32.07 908 + Normal
08/03/2026 07 AM PDT 32.08 912 + Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
08/03/2026 08 AM PDT 32.08 912 Normal
08/03/2026 09 AM PDT 32.09 916 + Normal
08/03/2026 10 AM PDT 32.09 916 0 Normal
08/03/2026 11 AM PDT 32.10 919 + Normal
08/03/2026 12 PM PDT 32.10 919 0 Normal
08/03/2026 01 PM PDT 32.11 923 + Normal
08/03/2026 02 PM PDT 32.11 923 0 Normal
08/03/2026 03 PM PDT 32.11 923 0 Normal
08/03/2026 04 PM PDT 32.12 927 + Normal
08/03/2026 05 PM PDT 32.12 927 0 Normal
08/03/2026 06 PM PDT 32.12 927 0 Normal
08/03/2026 07 PM PDT 32.12 927 0 Normal
08/03/2026 08 PM PDT 32.12 927 0 Normal
08/03/2026 09 PM PDT 32.12 927 0 Normal
08/03/2026 10 PM PDT 32.12 927 0 Normal
08/03/2026 11 PM PDT 32.12 927 0 Normal
08/04/2026 12 AM PDT 32.12 927 0 Normal
08/04/2026 01 AM PDT 32.12 927 0 Normal
08/04/2026 02 AM PDT 32.12 927 0 Normal
08/04/2026 03 AM PDT 32.12 927 0 Normal
08/04/2026 04 AM PDT 32.12 927 0 Normal
08/04/2026 05 AM PDT 32.12 927 0 Normal
08/04/2026 06 AM PDT 32.11 923 - Normal
08/04/2026 07 AM PDT 32.11 923 0 Normal
08/04/2026 08 AM PDT 32.11 923 0 Normal
08/04/2026 09 AM PDT 32.10 919 - Normal
08/04/2026 10 AM PDT 32.10 919 0 Normal
08/04/2026 11 AM PDT 32.09 916 - Normal
08/04/2026 12 PM PDT 32.09 916 0 Normal
08/04/2026 01 PM PDT 32.08 912 - Normal
08/04/2026 02 PM PDT 32.08 912 0 Normal
08/04/2026 03 PM PDT 32.07 908 - Normal
08/04/2026 04 PM PDT 32.07 908 0 Normal
08/04/2026 05 PM PDT 32.06 905 - Normal
08/04/2026 06 PM PDT 32.06 905 0 Normal
08/04/2026 07 PM PDT 32.05 901 - Normal
08/04/2026 08 PM PDT 32.05 901 0 Normal
08/04/2026 09 PM PDT 32.04 897 - Normal
08/04/2026 10 PM PDT 32.03 893 - Normal
08/04/2026 11 PM PDT 32.03 893 0 Normal
08/05/2026 12 AM PDT 32.02 890 - Normal
08/05/2026 01 AM PDT 32.01 886 - Normal
08/05/2026 02 AM PDT 32.00 883 - Normal
08/05/2026 03 AM PDT 32.00 883 0 Normal
08/05/2026 04 AM PDT 31.99 879 - Normal
08/05/2026 05 AM PDT 31.98 875 - Normal
08/05/2026 06 AM PDT 31.97 872 - Normal
08/05/2026 07 AM PDT 31.96 868 - Normal
08/05/2026 08 AM PDT 31.95 864 - Normal
08/05/2026 09 AM PDT 31.94 861 - Normal
08/05/2026 10 AM PDT 31.93 857 - Normal
08/05/2026 11 AM PDT 31.92 853 - Normal
08/05/2026 12 PM PDT 31.91 850 - Normal
08/05/2026 01 PM PDT 31.90 846 - Normal
08/05/2026 02 PM PDT 31.89 843 - Normal
08/05/2026 03 PM PDT 31.88 839 - Normal
08/05/2026 04 PM PDT 31.87 836 - Normal
08/05/2026 05 PM PDT 31.86 832 - Normal
08/05/2026 06 PM PDT 31.86 832 0 Normal
08/05/2026 07 PM PDT 31.85 828 - Normal
08/05/2026 08 PM PDT 31.84 825 - Normal
08/05/2026 09 PM PDT 31.83 821 - Normal
08/05/2026 10 PM PDT 31.82 818 - Normal
08/05/2026 11 PM PDT 31.81 814 - Normal
08/06/2026 12 AM PDT 31.80 811 - Normal
08/06/2026 01 AM PDT 31.79 807 - Normal
08/06/2026 02 AM PDT 31.78 804 - Normal
08/06/2026 03 AM PDT 31.77 800 - Normal
08/06/2026 04 AM PDT 31.77 800 0 Normal
08/06/2026 05 AM PDT 31.76 797 - Normal
08/06/2026 06 AM PDT 31.75 793 - Normal
08/06/2026 07 AM PDT 31.75 793 0 Normal
08/06/2026 08 AM PDT 31.74 790 - Normal
08/06/2026 09 AM PDT 31.73 786 - Normal
08/06/2026 10 AM PDT 31.73 786 0 Normal
08/06/2026 11 AM PDT 31.72 783 - Normal
08/06/2026 12 PM PDT 31.72 783 0 Normal
08/06/2026 01 PM PDT 31.71 779 - Normal
08/06/2026 02 PM PDT 31.71 779 0 Normal
08/06/2026 03 PM PDT 31.70 776 - Normal
08/06/2026 04 PM PDT 31.70 776 0 Normal
08/06/2026 05 PM PDT 31.69 772 - Normal
08/06/2026 06 PM PDT 31.69 772 0 Normal
08/06/2026 07 PM PDT 31.68 769 - Normal
08/06/2026 08 PM PDT 31.68 769 0 Normal
08/06/2026 09 PM PDT 31.68 769 0 Normal
08/06/2026 10 PM PDT 31.67 765 - Normal
08/06/2026 11 PM PDT 31.67 765 0 Normal
08/07/2026 12 AM PDT 31.67 765 0 Normal
08/07/2026 01 AM PDT 31.66 762 - Normal
08/07/2026 02 AM PDT 31.66 762 0 Normal
08/07/2026 03 AM PDT 31.66 762 0 Normal
08/07/2026 04 AM PDT 31.65 759 - Normal
08/07/2026 05 AM PDT 31.65 759 0 Normal
08/07/2026 06 AM PDT 31.65 759 0 Normal
08/07/2026 07 AM PDT 31.65 759 0 Normal
08/07/2026 08 AM PDT 31.65 759 0 Normal
08/07/2026 09 AM PDT 31.64 755 - Normal
08/07/2026 10 AM PDT 31.64 755 0 Normal
08/07/2026 11 AM PDT 31.64 755 0 Normal
08/07/2026 12 PM PDT 31.64 755 0 Normal
08/07/2026 01 PM PDT 31.64 755 0 Normal
08/07/2026 02 PM PDT 31.64 755 0 Normal
08/07/2026 03 PM PDT 31.64 755 0 Normal
08/07/2026 04 PM PDT 31.63 752 - Normal
08/07/2026 05 PM PDT 31.63 752 0 Normal
08/07/2026 06 PM PDT 31.63 752 0 Normal
08/07/2026 07 PM PDT 31.63 752 0 Normal
08/07/2026 08 PM PDT 31.63 752 0 Normal
08/07/2026 09 PM PDT 31.63 752 0 Normal
08/07/2026 10 PM PDT 31.63 752 0 Normal
08/07/2026 11 PM PDT 31.63 752 0 Normal
08/08/2026 12 AM PDT 31.63 752 0 Normal
08/08/2026 01 AM PDT 31.63 752 0 Normal
08/08/2026 02 AM PDT 31.63 752 0 Normal
08/08/2026 03 AM PDT 31.63 752 0 Normal
08/08/2026 04 AM PDT 31.62 748 - Normal
08/08/2026 05 AM PDT 31.62 748 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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