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RUSSIAN RIVER - HACIENDA BRIDGE (RIOC1)
| Latitude: 38.51º N | Longitude: 122.93º W | Elevation: 20 Feet | | | |
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | Feb 04 2026 at 7:15 AM PST | Next Issuance: | Feb 04 2026 at 3:00 PM PST
| |
| Action/Monitor: 31.0 Feet | Minor Flood: 34.0 Feet | Moderate Flood: N/A | Major Flood: N/A |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Russian River - Hacienda Bridge (RIOC1)
#
# File Generation Time: 02/04/2026 at 07:17 AM PST
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 01/30/2026 at 07:00 AM PST
# Maximum Observed Stage: 5.28 Feet
# Maximum Observed Flow: 1058 cfs
#
# Earliest Date & Time of Maximum Forecast: 02/04/2026 at 08:00 AM PST
# Maximum Forecast Stage: 4.63 Feet
# Maximum Forecast Flow: 826 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
01/30/2026 07 AM PST 5.28 1058 Normal
01/30/2026 08 AM PST 5.26 1051 - Normal
01/30/2026 09 AM PST 5.26 1051 0 Normal
01/30/2026 10 AM PST 5.25 1047 - Normal
01/30/2026 11 AM PST 5.24 1043 - Normal
01/30/2026 12 PM PST 5.25 1047 + Normal
01/30/2026 01 PM PST 5.23 1039 - Normal
01/30/2026 02 PM PST 5.23 1039 0 Normal
01/30/2026 03 PM PST 5.22 1036 - Normal
01/30/2026 04 PM PST 5.22 1036 0 Normal
01/30/2026 05 PM PST 5.21 1032 - Normal
01/30/2026 06 PM PST 5.20 1028 - Normal
01/30/2026 07 PM PST 5.20 1028 0 Normal
01/30/2026 08 PM PST 5.20 1028 0 Normal
01/30/2026 09 PM PST 5.20 1028 0 Normal
01/30/2026 10 PM PST 5.19 1024 - Normal
01/30/2026 11 PM PST 5.18 1021 - Normal
01/31/2026 12 AM PST 5.18 1021 0 Normal
01/31/2026 01 AM PST 5.18 1021 0 Normal
01/31/2026 02 AM PST 5.17 1017 - Normal
01/31/2026 03 AM PST 5.16 1013 - Normal
01/31/2026 04 AM PST 5.15 1010 - Normal
01/31/2026 05 AM PST 5.15 1010 0 Normal
01/31/2026 06 AM PST 5.15 1010 0 Normal
01/31/2026 07 AM PST 5.14 1006 - Normal
01/31/2026 08 AM PST 5.14 1006 0 Normal
01/31/2026 09 AM PST 5.13 1002 - Normal
01/31/2026 10 AM PST 5.13 1002 0 Normal
01/31/2026 11 AM PST 5.13 1002 0 Normal
01/31/2026 12 PM PST 5.12 999 - Normal
01/31/2026 01 PM PST 5.12 999 0 Normal
01/31/2026 02 PM PST 5.11 995 - Normal
01/31/2026 03 PM PST 5.12 999 + Normal
01/31/2026 04 PM PST 5.10 991 - Normal
01/31/2026 05 PM PST 5.10 991 0 Normal
01/31/2026 06 PM PST 5.09 988 - Normal
01/31/2026 07 PM PST 5.09 988 0 Normal
01/31/2026 08 PM PST 5.09 988 0 Normal
01/31/2026 09 PM PST 5.08 984 - Normal
01/31/2026 10 PM PST 5.08 984 0 Normal
01/31/2026 11 PM PST 5.06 977 - Normal
02/01/2026 12 AM PST 5.07 980 + Normal
02/01/2026 01 AM PST 5.06 977 - Normal
02/01/2026 02 AM PST 5.05 973 - Normal
02/01/2026 03 AM PST 5.05 973 0 Normal
02/01/2026 04 AM PST 5.03 966 - Normal
02/01/2026 05 AM PST 5.05 973 + Normal
02/01/2026 06 AM PST 5.03 966 - Normal
02/01/2026 07 AM PST 5.04 969 + Normal
02/01/2026 08 AM PST 5.04 969 0 Normal
02/01/2026 09 AM PST 5.03 966 - Normal
02/01/2026 10 AM PST 5.02 962 - Normal
02/01/2026 11 AM PST 5.01 959 - Normal
02/01/2026 12 PM PST 5.00 955 - Normal
02/01/2026 01 PM PST 5.00 955 0 Normal
02/01/2026 02 PM PST 5.00 955 0 Normal
02/01/2026 03 PM PST 4.99 951 - Normal
02/01/2026 04 PM PST 4.99 951 0 Normal
02/01/2026 05 PM PST 4.99 951 0 Normal
02/01/2026 06 PM PST 4.98 948 - Normal
02/01/2026 07 PM PST 4.98 948 0 Normal
02/01/2026 08 PM PST 4.98 948 0 Normal
02/01/2026 09 PM PST 4.97 944 - Normal
02/01/2026 10 PM PST 4.96 941 - Normal
02/01/2026 11 PM PST 4.97 944 + Normal
02/02/2026 12 AM PST 4.96 941 - Normal
02/02/2026 01 AM PST 4.96 941 0 Normal
02/02/2026 02 AM PST 4.94 933 - Normal
02/02/2026 03 AM PST 4.94 933 0 Normal
02/02/2026 04 AM PST 4.95 937 + Normal
02/02/2026 05 AM PST 4.94 933 - Normal
02/02/2026 06 AM PST 4.94 933 0 Normal
02/02/2026 07 AM PST 4.92 926 - Normal
02/02/2026 08 AM PST 4.92 926 0 Normal
02/02/2026 09 AM PST 4.92 926 0 Normal
02/02/2026 10 AM PST 4.91 923 - Normal
02/02/2026 11 AM PST 4.91 923 0 Normal
02/02/2026 12 PM PST 4.90 919 - Normal
02/02/2026 01 PM PST 4.90 919 0 Normal
02/02/2026 02 PM PST 4.89 916 - Normal
02/02/2026 03 PM PST 4.88 912 - Normal
02/02/2026 04 PM PST 4.88 912 0 Normal
02/02/2026 05 PM PST 4.89 916 + Normal
02/02/2026 06 PM PST 4.87 909 - Normal
02/02/2026 07 PM PST 4.88 912 + Normal
02/02/2026 08 PM PST 4.86 905 - Normal
02/02/2026 09 PM PST 4.86 905 0 Normal
02/02/2026 10 PM PST 4.85 902 - Normal
02/02/2026 11 PM PST 4.84 898 - Normal
02/03/2026 12 AM PST 4.83 895 - Normal
02/03/2026 01 AM PST 4.81 888 - Normal
02/03/2026 02 AM PST 4.81 888 0 Normal
02/03/2026 03 AM PST 4.81 888 0 Normal
02/03/2026 04 AM PST 4.79 881 - Normal
02/03/2026 05 AM PST 4.79 881 0 Normal
02/03/2026 06 AM PST 4.78 877 - Normal
02/03/2026 07 AM PST 4.76 870 - Normal
02/03/2026 08 AM PST 4.77 874 + Normal
02/03/2026 09 AM PST 4.75 867 - Normal
02/03/2026 10 AM PST 4.74 864 - Normal
02/03/2026 11 AM PST 4.74 864 0 Normal
02/03/2026 12 PM PST 4.73 860 - Normal
02/03/2026 01 PM PST 4.72 857 - Normal
02/03/2026 02 PM PST 4.72 857 0 Normal
02/03/2026 03 PM PST 4.71 853 - Normal
02/03/2026 04 PM PST 4.71 853 0 Normal
02/03/2026 05 PM PST 4.70 850 - Normal
02/03/2026 06 PM PST 4.71 853 + Normal
02/03/2026 07 PM PST 4.70 850 - Normal
02/03/2026 08 PM PST 4.69 846 - Normal
02/03/2026 09 PM PST 4.69 846 0 Normal
02/03/2026 10 PM PST 4.69 846 0 Normal
02/03/2026 11 PM PST 4.69 846 0 Normal
02/04/2026 12 AM PST 4.68 843 - Normal
02/04/2026 01 AM PST 4.68 843 0 Normal
02/04/2026 02 AM PST 4.67 840 - Normal
02/04/2026 03 AM PST 4.66 836 - Normal
02/04/2026 04 AM PST 4.66 836 0 Normal
02/04/2026 05 AM PST 4.65 833 - Normal
02/04/2026 06 AM PST 4.64 830 - Normal
02/04/2026 07 AM PST 4.64 830 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
02/04/2026 08 AM PST 4.63 826 Normal
02/04/2026 09 AM PST 4.63 826 0 Normal
02/04/2026 10 AM PST 4.62 823 - Normal
02/04/2026 11 AM PST 4.62 823 0 Normal
02/04/2026 12 PM PST 4.61 819 - Normal
02/04/2026 01 PM PST 4.61 819 0 Normal
02/04/2026 02 PM PST 4.61 819 0 Normal
02/04/2026 03 PM PST 4.61 819 0 Normal
02/04/2026 04 PM PST 4.61 819 0 Normal
02/04/2026 05 PM PST 4.60 816 - Normal
02/04/2026 06 PM PST 4.60 816 0 Normal
02/04/2026 07 PM PST 4.60 816 0 Normal
02/04/2026 08 PM PST 4.59 813 - Normal
02/04/2026 09 PM PST 4.59 813 0 Normal
02/04/2026 10 PM PST 4.59 813 0 Normal
02/04/2026 11 PM PST 4.59 813 0 Normal
02/05/2026 12 AM PST 4.58 809 - Normal
02/05/2026 01 AM PST 4.58 809 0 Normal
02/05/2026 02 AM PST 4.58 809 0 Normal
02/05/2026 03 AM PST 4.58 809 0 Normal
02/05/2026 04 AM PST 4.57 806 - Normal
02/05/2026 05 AM PST 4.57 806 0 Normal
02/05/2026 06 AM PST 4.57 806 0 Normal
02/05/2026 07 AM PST 4.57 806 0 Normal
02/05/2026 08 AM PST 4.56 803 - Normal
02/05/2026 09 AM PST 4.56 803 0 Normal
02/05/2026 10 AM PST 4.56 803 0 Normal
02/05/2026 11 AM PST 4.56 803 0 Normal
02/05/2026 12 PM PST 4.56 803 0 Normal
02/05/2026 01 PM PST 4.55 799 - Normal
02/05/2026 02 PM PST 4.55 799 0 Normal
02/05/2026 03 PM PST 4.55 799 0 Normal
02/05/2026 04 PM PST 4.55 799 0 Normal
02/05/2026 05 PM PST 4.55 799 0 Normal
02/05/2026 06 PM PST 4.54 796 - Normal
02/05/2026 07 PM PST 4.54 796 0 Normal
02/05/2026 08 PM PST 4.54 796 0 Normal
02/05/2026 09 PM PST 4.54 796 0 Normal
02/05/2026 10 PM PST 4.54 796 0 Normal
02/05/2026 11 PM PST 4.54 796 0 Normal
02/06/2026 12 AM PST 4.53 793 - Normal
02/06/2026 01 AM PST 4.53 793 0 Normal
02/06/2026 02 AM PST 4.53 793 0 Normal
02/06/2026 03 AM PST 4.53 793 0 Normal
02/06/2026 04 AM PST 4.53 793 0 Normal
02/06/2026 05 AM PST 4.52 790 - Normal
02/06/2026 06 AM PST 4.52 790 0 Normal
02/06/2026 07 AM PST 4.52 790 0 Normal
02/06/2026 08 AM PST 4.52 790 0 Normal
02/06/2026 09 AM PST 4.51 786 - Normal
02/06/2026 10 AM PST 4.51 786 0 Normal
02/06/2026 11 AM PST 4.51 786 0 Normal
02/06/2026 12 PM PST 4.51 786 0 Normal
02/06/2026 01 PM PST 4.51 786 0 Normal
02/06/2026 02 PM PST 4.50 783 - Normal
02/06/2026 03 PM PST 4.50 783 0 Normal
02/06/2026 04 PM PST 4.50 783 0 Normal
02/06/2026 05 PM PST 4.50 783 0 Normal
02/06/2026 06 PM PST 4.50 783 0 Normal
02/06/2026 07 PM PST 4.50 783 0 Normal
02/06/2026 08 PM PST 4.49 780 - Normal
02/06/2026 09 PM PST 4.49 780 0 Normal
02/06/2026 10 PM PST 4.49 780 0 Normal
02/06/2026 11 PM PST 4.49 780 0 Normal
02/07/2026 12 AM PST 4.49 780 0 Normal
02/07/2026 01 AM PST 4.49 780 0 Normal
02/07/2026 02 AM PST 4.48 776 - Normal
02/07/2026 03 AM PST 4.48 776 0 Normal
02/07/2026 04 AM PST 4.48 776 0 Normal
02/07/2026 05 AM PST 4.48 776 0 Normal
02/07/2026 06 AM PST 4.48 776 0 Normal
02/07/2026 07 AM PST 4.47 773 - Normal
02/07/2026 08 AM PST 4.47 773 0 Normal
02/07/2026 09 AM PST 4.47 773 0 Normal
02/07/2026 10 AM PST 4.47 773 0 Normal
02/07/2026 11 AM PST 4.47 773 0 Normal
02/07/2026 12 PM PST 4.46 770 - Normal
02/07/2026 01 PM PST 4.46 770 0 Normal
02/07/2026 02 PM PST 4.46 770 0 Normal
02/07/2026 03 PM PST 4.46 770 0 Normal
02/07/2026 04 PM PST 4.46 770 0 Normal
02/07/2026 05 PM PST 4.46 770 0 Normal
02/07/2026 06 PM PST 4.46 770 0 Normal
02/07/2026 07 PM PST 4.45 767 - Normal
02/07/2026 08 PM PST 4.45 767 0 Normal
02/07/2026 09 PM PST 4.45 767 0 Normal
02/07/2026 10 PM PST 4.45 767 0 Normal
02/07/2026 11 PM PST 4.45 767 0 Normal
02/08/2026 12 AM PST 4.45 767 0 Normal
02/08/2026 01 AM PST 4.44 763 - Normal
02/08/2026 02 AM PST 4.44 763 0 Normal
02/08/2026 03 AM PST 4.44 763 0 Normal
02/08/2026 04 AM PST 4.44 763 0 Normal
02/08/2026 05 AM PST 4.44 763 0 Normal
02/08/2026 06 AM PST 4.43 760 - Normal
02/08/2026 07 AM PST 4.43 760 0 Normal
02/08/2026 08 AM PST 4.43 760 0 Normal
02/08/2026 09 AM PST 4.43 760 0 Normal
02/08/2026 10 AM PST 4.43 760 0 Normal
02/08/2026 11 AM PST 4.43 760 0 Normal
02/08/2026 12 PM PST 4.42 757 - Normal
02/08/2026 01 PM PST 4.42 757 0 Normal
02/08/2026 02 PM PST 4.42 757 0 Normal
02/08/2026 03 PM PST 4.42 757 0 Normal
02/08/2026 04 PM PST 4.42 757 0 Normal
02/08/2026 05 PM PST 4.42 757 0 Normal
02/08/2026 06 PM PST 4.42 757 0 Normal
02/08/2026 07 PM PST 4.41 754 - Normal
02/08/2026 08 PM PST 4.41 754 0 Normal
02/08/2026 09 PM PST 4.41 754 0 Normal
02/08/2026 10 PM PST 4.41 754 0 Normal
02/08/2026 11 PM PST 4.41 754 0 Normal
02/09/2026 12 AM PST 4.41 754 0 Normal
02/09/2026 01 AM PST 4.40 751 - Normal
02/09/2026 02 AM PST 4.40 751 0 Normal
02/09/2026 03 AM PST 4.40 751 0 Normal
02/09/2026 04 AM PST 4.40 751 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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