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RUSSIAN RIVER - HACIENDA BRIDGE (RIOC1)
| Latitude: 38.51º N | Longitude: 122.93º W | Elevation: 20 Feet | | Forecast Type: Unofficial Location |
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | Mar 27 2026 at 12:45 PM PDT | Next Issuance: | Mar 28 2026 at 9:00 AM PDT
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| 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: 03/27/2026 at 12:46 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 03/22/2026 at 02:00 PM PDT
# Maximum Observed Stage: 4.61 Feet
# Maximum Observed Flow: 819 cfs
#
# Earliest Date & Time of Maximum Forecast: 03/27/2026 at 01:00 PM PDT
# Maximum Forecast Stage: 3.97 Feet
# Maximum Forecast Flow: 633 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
03/22/2026 12 PM PDT 4.61 819 Normal
03/22/2026 01 PM PDT 4.61 819 0 Normal
03/22/2026 02 PM PDT 4.61 819 0 Normal
03/22/2026 03 PM PDT 4.60 816 - Normal
03/22/2026 04 PM PDT 4.60 816 0 Normal
03/22/2026 05 PM PDT 4.59 813 - Normal
03/22/2026 06 PM PDT 4.60 816 + Normal
03/22/2026 07 PM PDT 4.59 813 - Normal
03/22/2026 08 PM PDT 4.58 809 - Normal
03/22/2026 09 PM PDT 4.58 809 0 Normal
03/22/2026 10 PM PDT 4.58 809 0 Normal
03/22/2026 11 PM PDT 4.58 809 0 Normal
03/23/2026 12 AM PDT 4.57 806 - Normal
03/23/2026 01 AM PDT 4.56 803 - Normal
03/23/2026 02 AM PDT 4.56 803 0 Normal
03/23/2026 03 AM PDT 4.56 803 0 Normal
03/23/2026 04 AM PDT 4.55 800 - Normal
03/23/2026 05 AM PDT 4.55 800 0 Normal
03/23/2026 06 AM PDT 4.54 797 - Normal
03/23/2026 07 AM PDT 4.55 800 + Normal
03/23/2026 08 AM PDT 4.54 797 - Normal
03/23/2026 09 AM PDT 4.54 797 0 Normal
03/23/2026 10 AM PDT 4.53 794 - Normal
03/23/2026 11 AM PDT 4.53 794 0 Normal
03/23/2026 12 PM PDT 4.52 791 - Normal
03/23/2026 01 PM PDT 4.52 791 0 Normal
03/23/2026 02 PM PDT 4.52 791 0 Normal
03/23/2026 03 PM PDT 4.52 791 0 Normal
03/23/2026 04 PM PDT 4.52 791 0 Normal
03/23/2026 05 PM PDT 4.51 788 - Normal
03/23/2026 06 PM PDT 4.50 785 - Normal
03/23/2026 07 PM PDT 4.49 782 - Normal
03/23/2026 08 PM PDT 4.49 782 0 Normal
03/23/2026 09 PM PDT 4.47 776 - Normal
03/23/2026 10 PM PDT 4.47 776 0 Normal
03/23/2026 11 PM PDT 4.46 773 - Normal
03/24/2026 12 AM PDT 4.45 770 - Normal
03/24/2026 01 AM PDT 4.44 767 - Normal
03/24/2026 02 AM PDT 4.44 767 0 Normal
03/24/2026 03 AM PDT 4.44 767 0 Normal
03/24/2026 04 AM PDT 4.44 767 0 Normal
03/24/2026 05 AM PDT 4.42 761 - Normal
03/24/2026 06 AM PDT 4.41 758 - Normal
03/24/2026 07 AM PDT 4.41 758 0 Normal
03/24/2026 08 AM PDT 4.41 758 0 Normal
03/24/2026 09 AM PDT 4.40 755 - Normal
03/24/2026 10 AM PDT 4.40 755 0 Normal
03/24/2026 11 AM PDT 4.39 752 - Normal
03/24/2026 12 PM PDT 4.39 752 0 Normal
03/24/2026 01 PM PDT 4.38 749 - Normal
03/24/2026 02 PM PDT 4.37 747 - Normal
03/24/2026 03 PM PDT 4.37 747 0 Normal
03/24/2026 04 PM PDT 4.36 744 - Normal
03/24/2026 05 PM PDT 4.36 744 0 Normal
03/24/2026 06 PM PDT 4.36 744 0 Normal
03/24/2026 07 PM PDT 4.34 738 - Normal
03/24/2026 08 PM PDT 4.34 738 0 Normal
03/24/2026 09 PM PDT 4.32 732 - Normal
03/24/2026 10 PM PDT 4.32 732 0 Normal
03/24/2026 11 PM PDT 4.31 729 - Normal
03/25/2026 12 AM PDT 4.29 723 - Normal
03/25/2026 01 AM PDT 4.29 723 0 Normal
03/25/2026 02 AM PDT 4.28 720 - Normal
03/25/2026 03 AM PDT 4.27 717 - Normal
03/25/2026 04 AM PDT 4.27 717 0 Normal
03/25/2026 05 AM PDT 4.26 715 - Normal
03/25/2026 06 AM PDT 4.26 715 0 Normal
03/25/2026 07 AM PDT 4.26 715 0 Normal
03/25/2026 08 AM PDT 4.25 712 - Normal
03/25/2026 09 AM PDT 4.24 709 - Normal
03/25/2026 10 AM PDT 4.24 709 0 Normal
03/25/2026 11 AM PDT 4.23 706 - Normal
03/25/2026 12 PM PDT 4.23 706 0 Normal
03/25/2026 01 PM PDT 4.23 706 0 Normal
03/25/2026 02 PM PDT 4.22 703 - Normal
03/25/2026 03 PM PDT 4.22 703 0 Normal
03/25/2026 04 PM PDT 4.21 700 - Normal
03/25/2026 05 PM PDT 4.20 697 - Normal
03/25/2026 06 PM PDT 4.20 697 0 Normal
03/25/2026 07 PM PDT 4.19 695 - Normal
03/25/2026 08 PM PDT 4.18 692 - Normal
03/25/2026 09 PM PDT 4.16 686 - Normal
03/25/2026 10 PM PDT 4.16 686 0 Normal
03/25/2026 11 PM PDT 4.14 680 - Normal
03/26/2026 12 AM PDT 4.14 680 0 Normal
03/26/2026 01 AM PDT 4.12 675 - Normal
03/26/2026 02 AM PDT 4.12 675 0 Normal
03/26/2026 03 AM PDT 4.11 672 - Normal
03/26/2026 04 AM PDT 4.11 672 0 Normal
03/26/2026 05 AM PDT 4.10 669 - Normal
03/26/2026 06 AM PDT 4.10 669 0 Normal
03/26/2026 07 AM PDT 4.09 666 - Normal
03/26/2026 08 AM PDT 4.09 666 0 Normal
03/26/2026 09 AM PDT 4.08 664 - Normal
03/26/2026 10 AM PDT 4.08 664 0 Normal
03/26/2026 11 AM PDT 4.08 664 0 Normal
03/26/2026 12 PM PDT 4.07 661 - Normal
03/26/2026 01 PM PDT 4.07 661 0 Normal
03/26/2026 02 PM PDT 4.05 655 - Normal
03/26/2026 03 PM PDT 4.05 655 0 Normal
03/26/2026 04 PM PDT 4.04 653 - Normal
03/26/2026 05 PM PDT 4.04 653 0 Normal
03/26/2026 06 PM PDT 4.04 653 0 Normal
03/26/2026 07 PM PDT 4.03 650 - Normal
03/26/2026 08 PM PDT 4.03 650 0 Normal
03/26/2026 09 PM PDT 4.03 650 0 Normal
03/26/2026 10 PM PDT 4.03 650 0 Normal
03/26/2026 11 PM PDT 4.02 647 - Normal
03/27/2026 12 AM PDT 4.02 647 0 Normal
03/27/2026 01 AM PDT 4.01 644 - Normal
03/27/2026 02 AM PDT 4.01 644 0 Normal
03/27/2026 03 AM PDT 4.01 644 0 Normal
03/27/2026 04 AM PDT 4.00 642 - Normal
03/27/2026 05 AM PDT 4.00 642 0 Normal
03/27/2026 06 AM PDT 4.00 642 0 Normal
03/27/2026 07 AM PDT 3.99 639 - Normal
03/27/2026 08 AM PDT 3.99 639 0 Normal
03/27/2026 09 AM PDT 3.99 639 0 Normal
03/27/2026 10 AM PDT 3.99 639 0 Normal
03/27/2026 11 AM PDT 3.98 636 - Normal
03/27/2026 12 PM PDT 3.98 636 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
03/27/2026 01 PM PDT 3.97 633 Normal
03/27/2026 02 PM PDT 3.97 633 0 Normal
03/27/2026 03 PM PDT 3.97 633 0 Normal
03/27/2026 04 PM PDT 3.97 633 0 Normal
03/27/2026 05 PM PDT 3.97 633 0 Normal
03/27/2026 06 PM PDT 3.97 633 0 Normal
03/27/2026 07 PM PDT 3.96 631 - Normal
03/27/2026 08 PM PDT 3.96 631 0 Normal
03/27/2026 09 PM PDT 3.96 631 0 Normal
03/27/2026 10 PM PDT 3.96 631 0 Normal
03/27/2026 11 PM PDT 3.95 628 - Normal
03/28/2026 12 AM PDT 3.95 628 0 Normal
03/28/2026 01 AM PDT 3.95 628 0 Normal
03/28/2026 02 AM PDT 3.95 628 0 Normal
03/28/2026 03 AM PDT 3.94 625 - Normal
03/28/2026 04 AM PDT 3.94 625 0 Normal
03/28/2026 05 AM PDT 3.94 625 0 Normal
03/28/2026 06 AM PDT 3.94 625 0 Normal
03/28/2026 07 AM PDT 3.94 625 0 Normal
03/28/2026 08 AM PDT 3.94 625 0 Normal
03/28/2026 09 AM PDT 3.93 623 - Normal
03/28/2026 10 AM PDT 3.93 623 0 Normal
03/28/2026 11 AM PDT 3.93 623 0 Normal
03/28/2026 12 PM PDT 3.93 623 0 Normal
03/28/2026 01 PM PDT 3.93 623 0 Normal
03/28/2026 02 PM PDT 3.93 623 0 Normal
03/28/2026 03 PM PDT 3.92 620 - Normal
03/28/2026 04 PM PDT 3.92 620 0 Normal
03/28/2026 05 PM PDT 3.92 620 0 Normal
03/28/2026 06 PM PDT 3.92 620 0 Normal
03/28/2026 07 PM PDT 3.92 620 0 Normal
03/28/2026 08 PM PDT 3.92 620 0 Normal
03/28/2026 09 PM PDT 3.92 620 0 Normal
03/28/2026 10 PM PDT 3.91 617 - Normal
03/28/2026 11 PM PDT 3.91 617 0 Normal
03/29/2026 12 AM PDT 3.91 617 0 Normal
03/29/2026 01 AM PDT 3.91 617 0 Normal
03/29/2026 02 AM PDT 3.91 617 0 Normal
03/29/2026 03 AM PDT 3.90 615 - Normal
03/29/2026 04 AM PDT 3.90 615 0 Normal
03/29/2026 05 AM PDT 3.90 615 0 Normal
03/29/2026 06 AM PDT 3.90 615 0 Normal
03/29/2026 07 AM PDT 3.90 615 0 Normal
03/29/2026 08 AM PDT 3.90 615 0 Normal
03/29/2026 09 AM PDT 3.90 615 0 Normal
03/29/2026 10 AM PDT 3.89 612 - Normal
03/29/2026 11 AM PDT 3.89 612 0 Normal
03/29/2026 12 PM PDT 3.89 612 0 Normal
03/29/2026 01 PM PDT 3.89 612 0 Normal
03/29/2026 02 PM PDT 3.89 612 0 Normal
03/29/2026 03 PM PDT 3.89 612 0 Normal
03/29/2026 04 PM PDT 3.88 609 - Normal
03/29/2026 05 PM PDT 3.88 609 0 Normal
03/29/2026 06 PM PDT 3.88 609 0 Normal
03/29/2026 07 PM PDT 3.88 609 0 Normal
03/29/2026 08 PM PDT 3.88 609 0 Normal
03/29/2026 09 PM PDT 3.88 609 0 Normal
03/29/2026 10 PM PDT 3.88 609 0 Normal
03/29/2026 11 PM PDT 3.87 607 - Normal
03/30/2026 12 AM PDT 3.87 607 0 Normal
03/30/2026 01 AM PDT 3.87 607 0 Normal
03/30/2026 02 AM PDT 3.87 607 0 Normal
03/30/2026 03 AM PDT 3.87 607 0 Normal
03/30/2026 04 AM PDT 3.87 607 0 Normal
03/30/2026 05 AM PDT 3.86 604 - Normal
03/30/2026 06 AM PDT 3.86 604 0 Normal
03/30/2026 07 AM PDT 3.86 604 0 Normal
03/30/2026 08 AM PDT 3.86 604 0 Normal
03/30/2026 09 AM PDT 3.86 604 0 Normal
03/30/2026 10 AM PDT 3.85 602 - Normal
03/30/2026 11 AM PDT 3.85 602 0 Normal
03/30/2026 12 PM PDT 3.85 602 0 Normal
03/30/2026 01 PM PDT 3.85 602 0 Normal
03/30/2026 02 PM PDT 3.85 602 0 Normal
03/30/2026 03 PM PDT 3.85 602 0 Normal
03/30/2026 04 PM PDT 3.84 599 - Normal
03/30/2026 05 PM PDT 3.84 599 0 Normal
03/30/2026 06 PM PDT 3.84 599 0 Normal
03/30/2026 07 PM PDT 3.84 599 0 Normal
03/30/2026 08 PM PDT 3.84 599 0 Normal
03/30/2026 09 PM PDT 3.84 599 0 Normal
03/30/2026 10 PM PDT 3.83 597 - Normal
03/30/2026 11 PM PDT 3.83 597 0 Normal
03/31/2026 12 AM PDT 3.83 597 0 Normal
03/31/2026 01 AM PDT 3.83 597 0 Normal
03/31/2026 02 AM PDT 3.83 597 0 Normal
03/31/2026 03 AM PDT 3.83 597 0 Normal
03/31/2026 04 AM PDT 3.82 594 - Normal
03/31/2026 05 AM PDT 3.82 594 0 Normal
03/31/2026 06 AM PDT 3.82 594 0 Normal
03/31/2026 07 AM PDT 3.82 594 0 Normal
03/31/2026 08 AM PDT 3.82 594 0 Normal
03/31/2026 09 AM PDT 3.81 592 - Normal
03/31/2026 10 AM PDT 3.81 592 0 Normal
03/31/2026 11 AM PDT 3.81 592 0 Normal
03/31/2026 12 PM PDT 3.81 592 0 Normal
03/31/2026 01 PM PDT 3.81 592 0 Normal
03/31/2026 02 PM PDT 3.81 592 0 Normal
03/31/2026 03 PM PDT 3.81 592 0 Normal
03/31/2026 04 PM PDT 3.80 589 - Normal
03/31/2026 05 PM PDT 3.80 589 0 Normal
03/31/2026 06 PM PDT 3.80 589 0 Normal
03/31/2026 07 PM PDT 3.80 589 0 Normal
03/31/2026 08 PM PDT 3.80 589 0 Normal
03/31/2026 09 PM PDT 3.79 586 - Normal
03/31/2026 10 PM PDT 3.79 586 0 Normal
03/31/2026 11 PM PDT 3.79 586 0 Normal
04/01/2026 12 AM PDT 3.79 586 0 Normal
04/01/2026 01 AM PDT 3.79 586 0 Normal
04/01/2026 02 AM PDT 3.79 586 0 Normal
04/01/2026 03 AM PDT 3.79 586 0 Normal
04/01/2026 04 AM PDT 3.79 586 0 Normal
04/01/2026 05 AM PDT 3.79 586 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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