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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 25 2026 at 6:56 AM PDT | Next Issuance: | Aug 26 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: 08/25/2026 at 06:57 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 08/20/2026 at 11:00 AM PDT
# Maximum Observed Stage: 1.10 Feet
# Maximum Observed Flow: 104 cfs
#
# Earliest Date & Time of Maximum Forecast: 08/25/2026 at 07:00 AM PDT
# Maximum Forecast Stage: 0.90 Feet
# Maximum Forecast Flow: 86 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
08/20/2026 06 AM PDT 1.10 104 Normal
08/20/2026 07 AM PDT 1.10 104 0 Normal
08/20/2026 08 AM PDT 1.10 104 0 Normal
08/20/2026 09 AM PDT 1.10 104 0 Normal
08/20/2026 10 AM PDT 1.09 103 - Normal
08/20/2026 11 AM PDT 1.10 104 + Normal
08/20/2026 12 PM PDT 1.09 103 - Normal
08/20/2026 01 PM PDT 1.09 103 0 Normal
08/20/2026 02 PM PDT 1.09 103 0 Normal
08/20/2026 03 PM PDT 1.08 102 - Normal
08/20/2026 04 PM PDT 1.08 102 0 Normal
08/20/2026 05 PM PDT 1.08 102 0 Normal
08/20/2026 06 PM PDT 1.08 102 0 Normal
08/20/2026 07 PM PDT 1.08 102 0 Normal
08/20/2026 08 PM PDT 1.08 102 0 Normal
08/20/2026 09 PM PDT 1.08 102 0 Normal
08/20/2026 10 PM PDT 1.07 101 - Normal
08/20/2026 11 PM PDT 1.07 101 0 Normal
08/21/2026 12 AM PDT 1.07 101 0 Normal
08/21/2026 01 AM PDT 1.07 101 0 Normal
08/21/2026 02 AM PDT 1.07 101 0 Normal
08/21/2026 03 AM PDT 1.07 101 0 Normal
08/21/2026 04 AM PDT 1.07 101 0 Normal
08/21/2026 05 AM PDT 1.07 101 0 Normal
08/21/2026 06 AM PDT 1.07 101 0 Normal
08/21/2026 07 AM PDT 1.07 101 0 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
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
08/25/2026 07 AM PDT 0.90 86 Normal
08/25/2026 08 AM PDT 0.90 86 0 Normal
08/25/2026 09 AM PDT 0.90 86 0 Normal
08/25/2026 10 AM PDT 0.90 86 0 Normal
08/25/2026 11 AM PDT 0.90 86 0 Normal
08/25/2026 12 PM PDT 0.89 85 - Normal
08/25/2026 01 PM PDT 0.89 85 0 Normal
08/25/2026 02 PM PDT 0.89 85 0 Normal
08/25/2026 03 PM PDT 0.89 85 0 Normal
08/25/2026 04 PM PDT 0.89 85 0 Normal
08/25/2026 05 PM PDT 0.89 85 0 Normal
08/25/2026 06 PM PDT 0.89 85 0 Normal
08/25/2026 07 PM PDT 0.89 85 0 Normal
08/25/2026 08 PM PDT 0.89 85 0 Normal
08/25/2026 09 PM PDT 0.89 85 0 Normal
08/25/2026 10 PM PDT 0.89 85 0 Normal
08/25/2026 11 PM PDT 0.89 85 0 Normal
08/26/2026 12 AM PDT 0.89 85 0 Normal
08/26/2026 01 AM PDT 0.89 85 0 Normal
08/26/2026 02 AM PDT 0.88 84 - Normal
08/26/2026 03 AM PDT 0.88 84 0 Normal
08/26/2026 04 AM PDT 0.88 84 0 Normal
08/26/2026 05 AM PDT 0.88 84 0 Normal
08/26/2026 06 AM PDT 0.88 84 0 Normal
08/26/2026 07 AM PDT 0.88 84 0 Normal
08/26/2026 08 AM PDT 0.88 84 0 Normal
08/26/2026 09 AM PDT 0.88 84 0 Normal
08/26/2026 10 AM PDT 0.88 84 0 Normal
08/26/2026 11 AM PDT 0.88 84 0 Normal
08/26/2026 12 PM PDT 0.88 84 0 Normal
08/26/2026 01 PM PDT 0.88 84 0 Normal
08/26/2026 02 PM PDT 0.87 83 - Normal
08/26/2026 03 PM PDT 0.87 83 0 Normal
08/26/2026 04 PM PDT 0.87 83 0 Normal
08/26/2026 05 PM PDT 0.86 82 - Normal
08/26/2026 06 PM PDT 0.86 82 0 Normal
08/26/2026 07 PM PDT 0.85 81 - Normal
08/26/2026 08 PM PDT 0.84 81 - Normal
08/26/2026 09 PM PDT 0.83 80 - Normal
08/26/2026 10 PM PDT 0.82 79 - Normal
08/26/2026 11 PM PDT 0.80 77 - Normal
08/27/2026 12 AM PDT 0.79 77 - Normal
08/27/2026 01 AM PDT 0.77 75 - Normal
08/27/2026 02 AM PDT 0.76 74 - Normal
08/27/2026 03 AM PDT 0.74 73 - Normal
08/27/2026 04 AM PDT 0.73 72 - Normal
08/27/2026 05 AM PDT 0.71 70 - Normal
08/27/2026 06 AM PDT 0.70 69 - Normal
08/27/2026 07 AM PDT 0.68 68 - Normal
08/27/2026 08 AM PDT 0.67 67 - Normal
08/27/2026 09 AM PDT 0.65 66 - Normal
08/27/2026 10 AM PDT 0.64 65 - Normal
08/27/2026 11 AM PDT 0.62 63 - Normal
08/27/2026 12 PM PDT 0.61 63 - Normal
08/27/2026 01 PM PDT 0.60 62 - Normal
08/27/2026 02 PM PDT 0.59 61 - Normal
08/27/2026 03 PM PDT 0.58 61 - Normal
08/27/2026 04 PM PDT 0.57 60 - Normal
08/27/2026 05 PM PDT 0.56 59 - Normal
08/27/2026 06 PM PDT 0.55 59 - Normal
08/27/2026 07 PM PDT 0.54 58 - Normal
08/27/2026 08 PM PDT 0.53 57 - Normal
08/27/2026 09 PM PDT 0.53 57 0 Normal
08/27/2026 10 PM PDT 0.52 57 - Normal
08/27/2026 11 PM PDT 0.52 57 0 Normal
08/28/2026 12 AM PDT 0.51 56 - Normal
08/28/2026 01 AM PDT 0.51 56 0 Normal
08/28/2026 02 AM PDT 0.50 55 - Normal
08/28/2026 03 AM PDT 0.50 55 0 Normal
08/28/2026 04 AM PDT 0.50 55 0 Normal
08/28/2026 05 AM PDT 0.49 54 - Normal
08/28/2026 06 AM PDT 0.49 54 0 Normal
08/28/2026 07 AM PDT 0.49 54 0 Normal
08/28/2026 08 AM PDT 0.49 54 0 Normal
08/28/2026 09 AM PDT 0.49 54 0 Normal
08/28/2026 10 AM PDT 0.48 54 - Normal
08/28/2026 11 AM PDT 0.48 54 0 Normal
08/28/2026 12 PM PDT 0.48 54 0 Normal
08/28/2026 01 PM PDT 0.48 54 0 Normal
08/28/2026 02 PM PDT 0.48 54 0 Normal
08/28/2026 03 PM PDT 0.48 54 0 Normal
08/28/2026 04 PM PDT 0.48 54 0 Normal
08/28/2026 05 PM PDT 0.48 54 0 Normal
08/28/2026 06 PM PDT 0.48 54 0 Normal
08/28/2026 07 PM PDT 0.48 54 0 Normal
08/28/2026 08 PM PDT 0.48 54 0 Normal
08/28/2026 09 PM PDT 0.48 54 0 Normal
08/28/2026 10 PM PDT 0.48 54 0 Normal
08/28/2026 11 PM PDT 0.48 54 0 Normal
08/29/2026 12 AM PDT 0.48 54 0 Normal
08/29/2026 01 AM PDT 0.48 54 0 Normal
08/29/2026 02 AM PDT 0.48 54 0 Normal
08/29/2026 03 AM PDT 0.48 54 0 Normal
08/29/2026 04 AM PDT 0.48 54 0 Normal
08/29/2026 05 AM PDT 0.48 54 0 Normal
08/29/2026 06 AM PDT 0.48 54 0 Normal
08/29/2026 07 AM PDT 0.48 54 0 Normal
08/29/2026 08 AM PDT 0.48 54 0 Normal
08/29/2026 09 AM PDT 0.48 54 0 Normal
08/29/2026 10 AM PDT 0.48 54 0 Normal
08/29/2026 11 AM PDT 0.48 54 0 Normal
08/29/2026 12 PM PDT 0.48 54 0 Normal
08/29/2026 01 PM PDT 0.48 54 0 Normal
08/29/2026 02 PM PDT 0.48 54 0 Normal
08/29/2026 03 PM PDT 0.48 54 0 Normal
08/29/2026 04 PM PDT 0.48 54 0 Normal
08/29/2026 05 PM PDT 0.48 54 0 Normal
08/29/2026 06 PM PDT 0.48 54 0 Normal
08/29/2026 07 PM PDT 0.48 54 0 Normal
08/29/2026 08 PM PDT 0.48 54 0 Normal
08/29/2026 09 PM PDT 0.48 54 0 Normal
08/29/2026 10 PM PDT 0.48 54 0 Normal
08/29/2026 11 PM PDT 0.48 54 0 Normal
08/30/2026 12 AM PDT 0.48 54 0 Normal
08/30/2026 01 AM PDT 0.48 54 0 Normal
08/30/2026 02 AM PDT 0.48 54 0 Normal
08/30/2026 03 AM PDT 0.48 54 0 Normal
08/30/2026 04 AM PDT 0.48 54 0 Normal
08/30/2026 05 AM PDT 0.48 54 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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