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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: | Sep 11 2026 at 7:34 AM PDT | Next Issuance: | Sep 12 2026 at 9:00 AM PDT
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| Action: 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: 09/11/2026 at 07:36 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 09/08/2026 at 09:00 PM PDT
# Maximum Observed Stage: 1.97 Feet
# Maximum Observed Flow: 211 cfs
#
# Earliest Date & Time of Maximum Forecast: 09/11/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 1.07 Feet
# Maximum Forecast Flow: 101 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
09/06/2026 07 AM PDT 1.20 114 Normal
09/06/2026 08 AM PDT 1.21 115 + Normal
09/06/2026 09 AM PDT 1.21 115 0 Normal
09/06/2026 10 AM PDT 1.21 115 0 Normal
09/06/2026 11 AM PDT 1.21 115 0 Normal
09/06/2026 12 PM PDT 1.21 115 0 Normal
09/06/2026 01 PM PDT 1.21 115 0 Normal
09/06/2026 02 PM PDT 1.21 115 0 Normal
09/06/2026 03 PM PDT 1.21 115 0 Normal
09/06/2026 04 PM PDT 1.22 116 + Normal
09/06/2026 05 PM PDT 1.21 115 - Normal
09/06/2026 06 PM PDT 1.21 115 0 Normal
09/06/2026 07 PM PDT 1.22 116 + Normal
09/06/2026 08 PM PDT 1.22 116 0 Normal
09/06/2026 09 PM PDT 1.22 116 0 Normal
09/06/2026 10 PM PDT 1.23 117 + Normal
09/06/2026 11 PM PDT 1.23 117 0 Normal
09/07/2026 12 AM PDT 1.22 116 - Normal
09/07/2026 01 AM PDT 1.22 116 0 Normal
09/07/2026 02 AM PDT 1.22 116 0 Normal
09/07/2026 03 AM PDT 1.22 116 0 Normal
09/07/2026 04 AM PDT 1.22 116 0 Normal
09/07/2026 05 AM PDT 1.22 116 0 Normal
09/07/2026 06 AM PDT 1.22 116 0 Normal
09/07/2026 07 AM PDT 1.22 116 0 Normal
09/07/2026 08 AM PDT 1.22 116 0 Normal
09/07/2026 09 AM PDT 1.22 116 0 Normal
09/07/2026 10 AM PDT 1.23 117 + Normal
09/07/2026 11 AM PDT 1.23 117 0 Normal
09/07/2026 12 PM PDT 1.23 117 0 Normal
09/07/2026 01 PM PDT 1.22 116 - Normal
09/07/2026 02 PM PDT 1.23 117 + Normal
09/07/2026 03 PM PDT 1.23 117 0 Normal
09/07/2026 04 PM PDT 1.23 117 0 Normal
09/07/2026 05 PM PDT 1.22 116 - Normal
09/07/2026 06 PM PDT 1.22 116 0 Normal
09/07/2026 07 PM PDT 1.21 115 - Normal
09/07/2026 08 PM PDT 1.21 115 0 Normal
09/07/2026 09 PM PDT 1.21 115 0 Normal
09/07/2026 10 PM PDT 1.21 115 0 Normal
09/07/2026 11 PM PDT 1.20 114 - Normal
09/08/2026 12 AM PDT 1.20 114 0 Normal
09/08/2026 01 AM PDT 1.19 113 - Normal
09/08/2026 02 AM PDT 1.19 113 0 Normal
09/08/2026 03 AM PDT 1.19 113 0 Normal
09/08/2026 04 AM PDT 1.18 112 - Normal
09/08/2026 05 AM PDT 1.18 112 0 Normal
09/08/2026 06 AM PDT 1.18 112 0 Normal
09/08/2026 07 AM PDT 1.18 112 0 Normal
09/08/2026 08 AM PDT 1.18 112 0 Normal
09/08/2026 09 AM PDT 1.18 112 0 Normal
09/08/2026 10 AM PDT 1.18 112 0 Normal
09/08/2026 11 AM PDT 1.18 112 0 Normal
09/08/2026 12 PM PDT 1.18 112 0 Normal
09/08/2026 01 PM PDT 1.18 112 0 Normal
09/08/2026 02 PM PDT 1.23 117 + Normal
09/08/2026 03 PM PDT 1.40 136 + Normal
09/08/2026 04 PM PDT 1.61 161 + Normal
09/08/2026 05 PM PDT 1.78 184 + Normal
09/08/2026 06 PM PDT 1.88 198 + Normal
09/08/2026 07 PM PDT 1.94 206 + Normal
09/08/2026 08 PM PDT 1.97 211 + Normal
09/08/2026 09 PM PDT 1.97 211 0 Normal
09/08/2026 10 PM PDT 1.94 206 - Normal
09/08/2026 11 PM PDT 1.89 199 - Normal
09/09/2026 12 AM PDT 1.83 191 - Normal
09/09/2026 01 AM PDT 1.78 184 - Normal
09/09/2026 02 AM PDT 1.73 177 - Normal
09/09/2026 03 AM PDT 1.68 170 - Normal
09/09/2026 04 AM PDT 1.63 164 - Normal
09/09/2026 05 AM PDT 1.59 159 - Normal
09/09/2026 06 AM PDT 1.53 151 - Normal
09/09/2026 07 AM PDT 1.48 145 - Normal
09/09/2026 08 AM PDT 1.44 141 - Normal
09/09/2026 09 AM PDT 1.40 136 - Normal
09/09/2026 10 AM PDT 1.37 133 - Normal
09/09/2026 11 AM PDT 1.35 130 - Normal
09/09/2026 12 PM PDT 1.33 128 - Normal
09/09/2026 01 PM PDT 1.30 125 - Normal
09/09/2026 02 PM PDT 1.31 126 + Normal
09/09/2026 03 PM PDT 1.33 128 + Normal
09/09/2026 04 PM PDT 1.36 131 + Normal
09/09/2026 05 PM PDT 1.38 134 + Normal
09/09/2026 06 PM PDT 1.41 137 + Normal
09/09/2026 07 PM PDT 1.43 139 + Normal
09/09/2026 08 PM PDT 1.44 141 + Normal
09/09/2026 09 PM PDT 1.43 139 - Normal
09/09/2026 10 PM PDT 1.40 136 - Normal
09/09/2026 11 PM PDT 1.37 133 - Normal
09/10/2026 12 AM PDT 1.33 128 - Normal
09/10/2026 01 AM PDT 1.30 125 - Normal
09/10/2026 02 AM PDT 1.27 122 - Normal
09/10/2026 03 AM PDT 1.25 119 - Normal
09/10/2026 04 AM PDT 1.23 117 - Normal
09/10/2026 05 AM PDT 1.20 114 - Normal
09/10/2026 06 AM PDT 1.20 114 0 Normal
09/10/2026 07 AM PDT 1.19 113 - Normal
09/10/2026 08 AM PDT 1.18 112 - Normal
09/10/2026 09 AM PDT 1.18 112 0 Normal
09/10/2026 10 AM PDT 1.17 111 - Normal
09/10/2026 11 AM PDT 1.17 111 0 Normal
09/10/2026 12 PM PDT 1.16 110 - Normal
09/10/2026 01 PM PDT 1.16 110 0 Normal
09/10/2026 02 PM PDT 1.17 111 + Normal
09/10/2026 03 PM PDT 1.17 111 0 Normal
09/10/2026 04 PM PDT 1.17 111 0 Normal
09/10/2026 05 PM PDT 1.17 111 0 Normal
09/10/2026 06 PM PDT 1.16 110 - Normal
09/10/2026 07 PM PDT 1.15 109 - Normal
09/10/2026 08 PM PDT 1.14 108 - Normal
09/10/2026 09 PM PDT 1.13 107 - Normal
09/10/2026 10 PM PDT 1.12 106 - Normal
09/10/2026 11 PM PDT 1.11 105 - Normal
09/11/2026 12 AM PDT 1.10 104 - Normal
09/11/2026 01 AM PDT 1.10 104 0 Normal
09/11/2026 02 AM PDT 1.09 103 - Normal
09/11/2026 03 AM PDT 1.08 102 - Normal
09/11/2026 04 AM PDT 1.08 102 0 Normal
09/11/2026 05 AM PDT 1.08 102 0 Normal
09/11/2026 06 AM PDT 1.07 101 - Normal
09/11/2026 07 AM PDT 1.07 101 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
09/11/2026 08 AM PDT 1.07 101 Normal
09/11/2026 09 AM PDT 1.07 101 0 Normal
09/11/2026 10 AM PDT 1.07 101 0 Normal
09/11/2026 11 AM PDT 1.07 101 0 Normal
09/11/2026 12 PM PDT 1.07 101 0 Normal
09/11/2026 01 PM PDT 1.06 100 - Normal
09/11/2026 02 PM PDT 1.06 100 0 Normal
09/11/2026 03 PM PDT 1.06 100 0 Normal
09/11/2026 04 PM PDT 1.06 100 0 Normal
09/11/2026 05 PM PDT 1.06 100 0 Normal
09/11/2026 06 PM PDT 1.05 99 - Normal
09/11/2026 07 PM PDT 1.05 99 0 Normal
09/11/2026 08 PM PDT 1.05 99 0 Normal
09/11/2026 09 PM PDT 1.05 99 0 Normal
09/11/2026 10 PM PDT 1.05 99 0 Normal
09/11/2026 11 PM PDT 1.05 99 0 Normal
09/12/2026 12 AM PDT 1.05 99 0 Normal
09/12/2026 01 AM PDT 1.04 98 - Normal
09/12/2026 02 AM PDT 1.04 98 0 Normal
09/12/2026 03 AM PDT 1.04 98 0 Normal
09/12/2026 04 AM PDT 1.04 98 0 Normal
09/12/2026 05 AM PDT 1.04 98 0 Normal
09/12/2026 06 AM PDT 1.04 98 0 Normal
09/12/2026 07 AM PDT 1.04 98 0 Normal
09/12/2026 08 AM PDT 1.05 99 + Normal
09/12/2026 09 AM PDT 1.05 99 0 Normal
09/12/2026 10 AM PDT 1.05 99 0 Normal
09/12/2026 11 AM PDT 1.05 99 0 Normal
09/12/2026 12 PM PDT 1.05 99 0 Normal
09/12/2026 01 PM PDT 1.05 99 0 Normal
09/12/2026 02 PM PDT 1.05 99 0 Normal
09/12/2026 03 PM PDT 1.05 99 0 Normal
09/12/2026 04 PM PDT 1.05 99 0 Normal
09/12/2026 05 PM PDT 1.05 99 0 Normal
09/12/2026 06 PM PDT 1.05 99 0 Normal
09/12/2026 07 PM PDT 1.05 99 0 Normal
09/12/2026 08 PM PDT 1.05 99 0 Normal
09/12/2026 09 PM PDT 1.05 99 0 Normal
09/12/2026 10 PM PDT 1.05 99 0 Normal
09/12/2026 11 PM PDT 1.05 99 0 Normal
09/13/2026 12 AM PDT 1.05 99 0 Normal
09/13/2026 01 AM PDT 1.05 99 0 Normal
09/13/2026 02 AM PDT 1.05 99 0 Normal
09/13/2026 03 AM PDT 1.05 99 0 Normal
09/13/2026 04 AM PDT 1.05 99 0 Normal
09/13/2026 05 AM PDT 1.05 99 0 Normal
09/13/2026 06 AM PDT 1.04 98 - Normal
09/13/2026 07 AM PDT 1.04 98 0 Normal
09/13/2026 08 AM PDT 1.04 98 0 Normal
09/13/2026 09 AM PDT 1.04 98 0 Normal
09/13/2026 10 AM PDT 1.04 98 0 Normal
09/13/2026 11 AM PDT 1.04 98 0 Normal
09/13/2026 12 PM PDT 1.04 98 0 Normal
09/13/2026 01 PM PDT 1.04 98 0 Normal
09/13/2026 02 PM PDT 1.04 98 0 Normal
09/13/2026 03 PM PDT 1.04 98 0 Normal
09/13/2026 04 PM PDT 1.04 98 0 Normal
09/13/2026 05 PM PDT 1.04 98 0 Normal
09/13/2026 06 PM PDT 1.04 98 0 Normal
09/13/2026 07 PM PDT 1.04 98 0 Normal
09/13/2026 08 PM PDT 1.04 98 0 Normal
09/13/2026 09 PM PDT 1.04 98 0 Normal
09/13/2026 10 PM PDT 1.04 98 0 Normal
09/13/2026 11 PM PDT 1.04 98 0 Normal
09/14/2026 12 AM PDT 1.04 98 0 Normal
09/14/2026 01 AM PDT 1.04 98 0 Normal
09/14/2026 02 AM PDT 1.04 98 0 Normal
09/14/2026 03 AM PDT 1.04 98 0 Normal
09/14/2026 04 AM PDT 1.04 98 0 Normal
09/14/2026 05 AM PDT 1.04 98 0 Normal
09/14/2026 06 AM PDT 1.04 98 0 Normal
09/14/2026 07 AM PDT 1.04 98 0 Normal
09/14/2026 08 AM PDT 1.04 98 0 Normal
09/14/2026 09 AM PDT 1.04 98 0 Normal
09/14/2026 10 AM PDT 1.04 98 0 Normal
09/14/2026 11 AM PDT 1.04 98 0 Normal
09/14/2026 12 PM PDT 1.04 98 0 Normal
09/14/2026 01 PM PDT 1.04 98 0 Normal
09/14/2026 02 PM PDT 1.04 98 0 Normal
09/14/2026 03 PM PDT 1.04 98 0 Normal
09/14/2026 04 PM PDT 1.04 98 0 Normal
09/14/2026 05 PM PDT 1.04 98 0 Normal
09/14/2026 06 PM PDT 1.04 98 0 Normal
09/14/2026 07 PM PDT 1.04 98 0 Normal
09/14/2026 08 PM PDT 1.04 98 0 Normal
09/14/2026 09 PM PDT 1.04 98 0 Normal
09/14/2026 10 PM PDT 1.04 98 0 Normal
09/14/2026 11 PM PDT 1.04 98 0 Normal
09/15/2026 12 AM PDT 1.04 98 0 Normal
09/15/2026 01 AM PDT 1.04 98 0 Normal
09/15/2026 02 AM PDT 1.04 98 0 Normal
09/15/2026 03 AM PDT 1.04 98 0 Normal
09/15/2026 04 AM PDT 1.04 98 0 Normal
09/15/2026 05 AM PDT 1.04 98 0 Normal
09/15/2026 06 AM PDT 1.04 98 0 Normal
09/15/2026 07 AM PDT 1.04 98 0 Normal
09/15/2026 08 AM PDT 1.04 98 0 Normal
09/15/2026 09 AM PDT 1.04 98 0 Normal
09/15/2026 10 AM PDT 1.04 98 0 Normal
09/15/2026 11 AM PDT 1.04 98 0 Normal
09/15/2026 12 PM PDT 1.04 98 0 Normal
09/15/2026 01 PM PDT 1.04 98 0 Normal
09/15/2026 02 PM PDT 1.04 98 0 Normal
09/15/2026 03 PM PDT 1.04 98 0 Normal
09/15/2026 04 PM PDT 1.04 98 0 Normal
09/15/2026 05 PM PDT 1.04 98 0 Normal
09/15/2026 06 PM PDT 1.04 98 0 Normal
09/15/2026 07 PM PDT 1.04 98 0 Normal
09/15/2026 08 PM PDT 1.04 98 0 Normal
09/15/2026 09 PM PDT 1.04 98 0 Normal
09/15/2026 10 PM PDT 1.04 98 0 Normal
09/15/2026 11 PM PDT 1.04 98 0 Normal
09/16/2026 12 AM PDT 1.04 98 0 Normal
09/16/2026 01 AM PDT 1.04 98 0 Normal
09/16/2026 02 AM PDT 1.04 98 0 Normal
09/16/2026 03 AM PDT 1.04 98 0 Normal
09/16/2026 04 AM PDT 1.04 98 0 Normal
09/16/2026 05 AM PDT 1.04 98 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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