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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: | Aug 26 2026 at 7:03 AM PDT | Next Issuance: | Aug 27 2026 at 9:00 AM PDT
| |
| 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: 08/26/2026 at 07:04 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 08/21/2026 at 01:00 PM PDT
# Maximum Observed Stage: 1.08 Feet
# Maximum Observed Flow: 102 cfs
#
# Earliest Date & Time of Maximum Forecast: 08/29/2026 at 09:00 PM PDT
# Maximum Forecast Stage: 1.15 Feet
# Maximum Forecast Flow: 109 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
08/21/2026 07 AM PDT 1.07 101 Normal
08/21/2026 08 AM PDT 1.07 101 0 Normal
08/21/2026 09 AM PDT 1.07 101 0 Normal
08/21/2026 10 AM PDT 1.07 101 0 Normal
08/21/2026 11 AM PDT 1.08 102 + Normal
08/21/2026 12 PM PDT 1.08 102 0 Normal
08/21/2026 01 PM PDT 1.08 102 0 Normal
08/21/2026 02 PM PDT 1.07 101 - Normal
08/21/2026 03 PM PDT 1.07 101 0 Normal
08/21/2026 04 PM PDT 1.07 101 0 Normal
08/21/2026 05 PM PDT 1.06 100 - Normal
08/21/2026 06 PM PDT 1.06 100 0 Normal
08/21/2026 07 PM PDT 1.06 100 0 Normal
08/21/2026 08 PM PDT 1.05 99 - Normal
08/21/2026 09 PM PDT 1.05 99 0 Normal
08/21/2026 10 PM PDT 1.05 99 0 Normal
08/21/2026 11 PM PDT 1.05 99 0 Normal
08/22/2026 12 AM PDT 1.05 99 0 Normal
08/22/2026 01 AM PDT 1.05 99 0 Normal
08/22/2026 02 AM PDT 1.05 99 0 Normal
08/22/2026 03 AM PDT 1.05 99 0 Normal
08/22/2026 04 AM PDT 1.05 99 0 Normal
08/22/2026 05 AM PDT 1.04 98 - Normal
08/22/2026 06 AM PDT 1.04 98 0 Normal
08/22/2026 07 AM PDT 1.05 99 + Normal
08/22/2026 08 AM PDT 1.05 99 0 Normal
08/22/2026 09 AM PDT 1.05 99 0 Normal
08/22/2026 10 AM PDT 1.05 99 0 Normal
08/22/2026 11 AM PDT 1.05 99 0 Normal
08/22/2026 12 PM PDT 1.05 99 0 Normal
08/22/2026 01 PM PDT 1.05 99 0 Normal
08/22/2026 02 PM PDT 1.05 99 0 Normal
08/22/2026 03 PM PDT 1.06 100 + Normal
08/22/2026 04 PM PDT 1.05 99 - Normal
08/22/2026 05 PM PDT 1.05 99 0 Normal
08/22/2026 06 PM PDT 1.05 99 0 Normal
08/22/2026 07 PM PDT 1.05 99 0 Normal
08/22/2026 08 PM PDT 1.04 98 - Normal
08/22/2026 09 PM PDT 1.04 98 0 Normal
08/22/2026 10 PM PDT 1.04 98 0 Normal
08/22/2026 11 PM PDT 1.04 98 0 Normal
08/23/2026 12 AM PDT 1.04 98 0 Normal
08/23/2026 01 AM PDT 1.04 98 0 Normal
08/23/2026 02 AM PDT 1.04 98 0 Normal
08/23/2026 03 AM PDT 1.04 98 0 Normal
08/23/2026 04 AM PDT 1.04 98 0 Normal
08/23/2026 05 AM PDT 1.04 98 0 Normal
08/23/2026 06 AM PDT 1.05 99 + Normal
08/23/2026 07 AM PDT 1.05 99 0 Normal
08/23/2026 08 AM PDT 1.05 99 0 Normal
08/23/2026 09 AM PDT 1.05 99 0 Normal
08/23/2026 10 AM PDT 1.06 100 + Normal
08/23/2026 11 AM PDT 1.06 100 0 Normal
08/23/2026 12 PM PDT 1.06 100 0 Normal
08/23/2026 01 PM PDT 1.06 100 0 Normal
08/23/2026 02 PM PDT 1.06 100 0 Normal
08/23/2026 03 PM PDT 1.06 100 0 Normal
08/23/2026 04 PM PDT 1.07 101 + Normal
08/23/2026 05 PM PDT 1.06 100 - Normal
08/23/2026 06 PM PDT 1.05 99 - Normal
08/23/2026 07 PM PDT 1.05 99 0 Normal
08/23/2026 08 PM PDT 1.05 99 0 Normal
08/23/2026 09 PM PDT 1.05 99 0 Normal
08/23/2026 10 PM PDT 1.05 99 0 Normal
08/23/2026 11 PM PDT 1.05 99 0 Normal
08/24/2026 12 AM PDT 1.04 98 - Normal
08/24/2026 01 AM PDT 1.04 98 0 Normal
08/24/2026 02 AM PDT 1.03 97 - Normal
08/24/2026 03 AM PDT 1.03 97 0 Normal
08/24/2026 04 AM PDT 1.03 97 0 Normal
08/24/2026 05 AM PDT 1.03 97 0 Normal
08/24/2026 06 AM PDT 1.03 97 0 Normal
08/24/2026 07 AM PDT 1.03 97 0 Normal
08/24/2026 08 AM PDT 1.04 98 + Normal
08/24/2026 09 AM PDT 1.04 98 0 Normal
08/24/2026 10 AM PDT 1.04 98 0 Normal
08/24/2026 11 AM PDT 1.04 98 0 Normal
08/24/2026 12 PM PDT 1.05 99 + Normal
08/24/2026 01 PM PDT 1.05 99 0 Normal
08/24/2026 02 PM PDT 1.04 98 - Normal
08/24/2026 03 PM PDT 1.04 98 0 Normal
08/24/2026 04 PM PDT 1.03 97 - Normal
08/24/2026 05 PM PDT 1.01 96 - Normal
08/24/2026 06 PM PDT 0.99 94 - Normal
08/24/2026 07 PM PDT 0.98 93 - Normal
08/24/2026 08 PM PDT 0.96 91 - Normal
08/24/2026 09 PM PDT 0.95 90 - Normal
08/24/2026 10 PM PDT 0.94 89 - Normal
08/24/2026 11 PM PDT 0.93 88 - Normal
08/25/2026 12 AM PDT 0.93 88 0 Normal
08/25/2026 01 AM PDT 0.92 88 - Normal
08/25/2026 02 AM PDT 0.92 88 0 Normal
08/25/2026 03 AM PDT 0.92 88 0 Normal
08/25/2026 04 AM PDT 0.91 87 - Normal
08/25/2026 05 AM PDT 0.91 87 0 Normal
08/25/2026 06 AM PDT 0.91 87 0 Normal
08/25/2026 07 AM PDT 0.91 87 0 Normal
08/25/2026 08 AM PDT 0.91 87 0 Normal
08/25/2026 09 AM PDT 0.91 87 0 Normal
08/25/2026 10 AM PDT 0.92 88 + Normal
08/25/2026 11 AM PDT 0.93 88 + Normal
08/25/2026 12 PM PDT 0.95 90 + Normal
08/25/2026 01 PM PDT 0.97 92 + Normal
08/25/2026 02 PM PDT 0.98 93 + Normal
08/25/2026 03 PM PDT 1.00 95 + Normal
08/25/2026 04 PM PDT 1.01 96 + Normal
08/25/2026 05 PM PDT 1.01 96 0 Normal
08/25/2026 06 PM PDT 1.02 97 + Normal
08/25/2026 07 PM PDT 1.03 97 + Normal
08/25/2026 08 PM PDT 1.03 97 0 Normal
08/25/2026 09 PM PDT 1.04 98 + Normal
08/25/2026 10 PM PDT 1.04 98 0 Normal
08/25/2026 11 PM PDT 1.04 98 0 Normal
08/26/2026 12 AM PDT 1.04 98 0 Normal
08/26/2026 01 AM PDT 1.04 98 0 Normal
08/26/2026 02 AM PDT 1.04 98 0 Normal
08/26/2026 03 AM PDT 1.04 98 0 Normal
08/26/2026 04 AM PDT 1.04 98 0 Normal
08/26/2026 05 AM PDT 1.04 98 0 Normal
08/26/2026 06 AM PDT 1.04 98 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
08/26/2026 07 AM PDT 1.04 98 Normal
08/26/2026 08 AM PDT 1.04 98 0 Normal
08/26/2026 09 AM PDT 1.04 98 0 Normal
08/26/2026 10 AM PDT 1.04 98 0 Normal
08/26/2026 11 AM PDT 1.04 98 0 Normal
08/26/2026 12 PM PDT 1.04 98 0 Normal
08/26/2026 01 PM PDT 1.03 97 - Normal
08/26/2026 02 PM PDT 1.03 97 0 Normal
08/26/2026 03 PM PDT 1.03 97 0 Normal
08/26/2026 04 PM PDT 1.03 97 0 Normal
08/26/2026 05 PM PDT 1.02 97 - Normal
08/26/2026 06 PM PDT 1.02 97 0 Normal
08/26/2026 07 PM PDT 1.01 96 - Normal
08/26/2026 08 PM PDT 1.01 96 0 Normal
08/26/2026 09 PM PDT 1.00 95 - Normal
08/26/2026 10 PM PDT 1.00 95 0 Normal
08/26/2026 11 PM PDT 1.00 95 0 Normal
08/27/2026 12 AM PDT 0.99 94 - Normal
08/27/2026 01 AM PDT 0.99 94 0 Normal
08/27/2026 02 AM PDT 0.99 94 0 Normal
08/27/2026 03 AM PDT 0.99 94 0 Normal
08/27/2026 04 AM PDT 1.00 95 + Normal
08/27/2026 05 AM PDT 1.00 95 0 Normal
08/27/2026 06 AM PDT 1.00 95 0 Normal
08/27/2026 07 AM PDT 1.01 96 + Normal
08/27/2026 08 AM PDT 1.01 96 0 Normal
08/27/2026 09 AM PDT 1.02 97 + Normal
08/27/2026 10 AM PDT 1.03 97 + Normal
08/27/2026 11 AM PDT 1.03 97 0 Normal
08/27/2026 12 PM PDT 1.04 98 + Normal
08/27/2026 01 PM PDT 1.05 99 + Normal
08/27/2026 02 PM PDT 1.05 99 0 Normal
08/27/2026 03 PM PDT 1.06 100 + Normal
08/27/2026 04 PM PDT 1.06 100 0 Normal
08/27/2026 05 PM PDT 1.07 101 + Normal
08/27/2026 06 PM PDT 1.08 102 + Normal
08/27/2026 07 PM PDT 1.08 102 0 Normal
08/27/2026 08 PM PDT 1.09 103 + Normal
08/27/2026 09 PM PDT 1.09 103 0 Normal
08/27/2026 10 PM PDT 1.10 104 + Normal
08/27/2026 11 PM PDT 1.10 104 0 Normal
08/28/2026 12 AM PDT 1.11 105 + Normal
08/28/2026 01 AM PDT 1.11 105 0 Normal
08/28/2026 02 AM PDT 1.11 105 0 Normal
08/28/2026 03 AM PDT 1.12 106 + Normal
08/28/2026 04 AM PDT 1.12 106 0 Normal
08/28/2026 05 AM PDT 1.12 106 0 Normal
08/28/2026 06 AM PDT 1.12 106 0 Normal
08/28/2026 07 AM PDT 1.13 107 + Normal
08/28/2026 08 AM PDT 1.13 107 0 Normal
08/28/2026 09 AM PDT 1.13 107 0 Normal
08/28/2026 10 AM PDT 1.13 107 0 Normal
08/28/2026 11 AM PDT 1.13 107 0 Normal
08/28/2026 12 PM PDT 1.14 108 + Normal
08/28/2026 01 PM PDT 1.14 108 0 Normal
08/28/2026 02 PM PDT 1.14 108 0 Normal
08/28/2026 03 PM PDT 1.14 108 0 Normal
08/28/2026 04 PM PDT 1.14 108 0 Normal
08/28/2026 05 PM PDT 1.14 108 0 Normal
08/28/2026 06 PM PDT 1.14 108 0 Normal
08/28/2026 07 PM PDT 1.14 108 0 Normal
08/28/2026 08 PM PDT 1.14 108 0 Normal
08/28/2026 09 PM PDT 1.14 108 0 Normal
08/28/2026 10 PM PDT 1.14 108 0 Normal
08/28/2026 11 PM PDT 1.14 108 0 Normal
08/29/2026 12 AM PDT 1.14 108 0 Normal
08/29/2026 01 AM PDT 1.14 108 0 Normal
08/29/2026 02 AM PDT 1.14 108 0 Normal
08/29/2026 03 AM PDT 1.14 108 0 Normal
08/29/2026 04 AM PDT 1.14 108 0 Normal
08/29/2026 05 AM PDT 1.14 108 0 Normal
08/29/2026 06 AM PDT 1.14 108 0 Normal
08/29/2026 07 AM PDT 1.14 108 0 Normal
08/29/2026 08 AM PDT 1.14 108 0 Normal
08/29/2026 09 AM PDT 1.14 108 0 Normal
08/29/2026 10 AM PDT 1.14 108 0 Normal
08/29/2026 11 AM PDT 1.14 108 0 Normal
08/29/2026 12 PM PDT 1.14 108 0 Normal
08/29/2026 01 PM PDT 1.14 108 0 Normal
08/29/2026 02 PM PDT 1.14 108 0 Normal
08/29/2026 03 PM PDT 1.14 108 0 Normal
08/29/2026 04 PM PDT 1.14 108 0 Normal
08/29/2026 05 PM PDT 1.14 108 0 Normal
08/29/2026 06 PM PDT 1.14 108 0 Normal
08/29/2026 07 PM PDT 1.14 108 0 Normal
08/29/2026 08 PM PDT 1.14 108 0 Normal
08/29/2026 09 PM PDT 1.15 109 + Normal
08/29/2026 10 PM PDT 1.15 109 0 Normal
08/29/2026 11 PM PDT 1.15 109 0 Normal
08/30/2026 12 AM PDT 1.15 109 0 Normal
08/30/2026 01 AM PDT 1.15 109 0 Normal
08/30/2026 02 AM PDT 1.15 109 0 Normal
08/30/2026 03 AM PDT 1.15 109 0 Normal
08/30/2026 04 AM PDT 1.15 109 0 Normal
08/30/2026 05 AM PDT 1.15 109 0 Normal
08/30/2026 06 AM PDT 1.15 109 0 Normal
08/30/2026 07 AM PDT 1.15 109 0 Normal
08/30/2026 08 AM PDT 1.15 109 0 Normal
08/30/2026 09 AM PDT 1.15 109 0 Normal
08/30/2026 10 AM PDT 1.15 109 0 Normal
08/30/2026 11 AM PDT 1.15 109 0 Normal
08/30/2026 12 PM PDT 1.15 109 0 Normal
08/30/2026 01 PM PDT 1.15 109 0 Normal
08/30/2026 02 PM PDT 1.15 109 0 Normal
08/30/2026 03 PM PDT 1.15 109 0 Normal
08/30/2026 04 PM PDT 1.15 109 0 Normal
08/30/2026 05 PM PDT 1.15 109 0 Normal
08/30/2026 06 PM PDT 1.15 109 0 Normal
08/30/2026 07 PM PDT 1.15 109 0 Normal
08/30/2026 08 PM PDT 1.15 109 0 Normal
08/30/2026 09 PM PDT 1.15 109 0 Normal
08/30/2026 10 PM PDT 1.15 109 0 Normal
08/30/2026 11 PM PDT 1.15 109 0 Normal
08/31/2026 12 AM PDT 1.15 109 0 Normal
08/31/2026 01 AM PDT 1.15 109 0 Normal
08/31/2026 02 AM PDT 1.15 109 0 Normal
08/31/2026 03 AM PDT 1.15 109 0 Normal
08/31/2026 04 AM PDT 1.15 109 0 Normal
08/31/2026 05 AM PDT 1.15 109 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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