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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: | May 30 2026 at 7:59 AM PDT | Next Issuance: | May 31 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: 05/30/2026 at 08:01 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/28/2026 at 05:00 PM PDT
# Maximum Observed Stage: 2.10 Feet
# Maximum Observed Flow: 242 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/30/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 1.92 Feet
# Maximum Forecast Flow: 214 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/25/2026 08 AM PDT 1.97 222 Normal
05/25/2026 09 AM PDT 1.98 223 + Normal
05/25/2026 10 AM PDT 1.98 223 0 Normal
05/25/2026 11 AM PDT 1.98 223 0 Normal
05/25/2026 12 PM PDT 1.98 223 0 Normal
05/25/2026 01 PM PDT 1.98 223 0 Normal
05/25/2026 02 PM PDT 1.98 223 0 Normal
05/25/2026 03 PM PDT 1.98 223 0 Normal
05/25/2026 04 PM PDT 1.98 223 0 Normal
05/25/2026 05 PM PDT 1.98 223 0 Normal
05/25/2026 06 PM PDT 1.98 223 0 Normal
05/25/2026 07 PM PDT 1.98 223 0 Normal
05/25/2026 08 PM PDT 1.98 223 0 Normal
05/25/2026 09 PM PDT 1.98 223 0 Normal
05/25/2026 10 PM PDT 1.98 223 0 Normal
05/25/2026 11 PM PDT 1.97 222 - Normal
05/26/2026 12 AM PDT 1.97 222 0 Normal
05/26/2026 01 AM PDT 1.97 222 0 Normal
05/26/2026 02 AM PDT 1.96 220 - Normal
05/26/2026 03 AM PDT 1.96 220 0 Normal
05/26/2026 04 AM PDT 1.96 220 0 Normal
05/26/2026 05 AM PDT 1.96 220 0 Normal
05/26/2026 06 AM PDT 1.96 220 0 Normal
05/26/2026 07 AM PDT 1.96 220 0 Normal
05/26/2026 08 AM PDT 1.96 220 0 Normal
05/26/2026 09 AM PDT 1.97 222 + Normal
05/26/2026 10 AM PDT 1.95 218 - Normal
05/26/2026 11 AM PDT 1.94 217 - Normal
05/26/2026 12 PM PDT 1.92 214 - Normal
05/26/2026 01 PM PDT 1.91 212 - Normal
05/26/2026 02 PM PDT 1.90 211 - Normal
05/26/2026 03 PM PDT 1.90 211 0 Normal
05/26/2026 04 PM PDT 1.89 209 - Normal
05/26/2026 05 PM PDT 1.88 208 - Normal
05/26/2026 06 PM PDT 1.87 206 - Normal
05/26/2026 07 PM PDT 1.88 208 + Normal
05/26/2026 08 PM PDT 1.90 211 + Normal
05/26/2026 09 PM PDT 1.91 212 + Normal
05/26/2026 10 PM PDT 1.92 214 + Normal
05/26/2026 11 PM PDT 1.93 215 + Normal
05/27/2026 12 AM PDT 1.92 214 - Normal
05/27/2026 01 AM PDT 1.93 215 + Normal
05/27/2026 02 AM PDT 1.92 214 - Normal
05/27/2026 03 AM PDT 1.92 214 0 Normal
05/27/2026 04 AM PDT 1.92 214 0 Normal
05/27/2026 05 AM PDT 1.92 214 0 Normal
05/27/2026 06 AM PDT 1.92 214 0 Normal
05/27/2026 07 AM PDT 1.92 214 0 Normal
05/27/2026 08 AM PDT 1.92 214 0 Normal
05/27/2026 09 AM PDT 1.93 215 + Normal
05/27/2026 10 AM PDT 1.93 215 0 Normal
05/27/2026 11 AM PDT 1.91 212 - Normal
05/27/2026 12 PM PDT 1.88 208 - Normal
05/27/2026 01 PM PDT 1.84 202 - Normal
05/27/2026 02 PM PDT 1.82 199 - Normal
05/27/2026 03 PM PDT 1.79 195 - Normal
05/27/2026 04 PM PDT 1.77 192 - Normal
05/27/2026 05 PM PDT 1.76 191 - Normal
05/27/2026 06 PM PDT 1.75 189 - Normal
05/27/2026 07 PM PDT 1.75 189 0 Normal
05/27/2026 08 PM PDT 1.76 191 + Normal
05/27/2026 09 PM PDT 1.77 192 + Normal
05/27/2026 10 PM PDT 1.77 192 0 Normal
05/27/2026 11 PM PDT 1.77 192 0 Normal
05/28/2026 12 AM PDT 1.77 192 0 Normal
05/28/2026 01 AM PDT 1.77 192 0 Normal
05/28/2026 02 AM PDT 1.78 193 + Normal
05/28/2026 03 AM PDT 1.79 195 + Normal
05/28/2026 04 AM PDT 1.81 198 + Normal
05/28/2026 05 AM PDT 1.83 201 + Normal
05/28/2026 06 AM PDT 1.84 202 + Normal
05/28/2026 07 AM PDT 1.85 204 + Normal
05/28/2026 08 AM PDT 1.86 205 + Normal
05/28/2026 09 AM PDT 1.87 206 + Normal
05/28/2026 10 AM PDT 1.90 211 + Normal
05/28/2026 11 AM PDT 1.92 214 + Normal
05/28/2026 12 PM PDT 1.93 215 + Normal
05/28/2026 01 PM PDT 1.94 217 + Normal
05/28/2026 02 PM PDT 1.97 222 + Normal
05/28/2026 03 PM PDT 2.03 231 + Normal
05/28/2026 04 PM PDT 2.08 239 + Normal
05/28/2026 05 PM PDT 2.10 242 + Normal
05/28/2026 06 PM PDT 2.09 240 - Normal
05/28/2026 07 PM PDT 2.07 237 - Normal
05/28/2026 08 PM PDT 2.06 236 - Normal
05/28/2026 09 PM PDT 2.04 232 - Normal
05/28/2026 10 PM PDT 2.04 232 0 Normal
05/28/2026 11 PM PDT 2.03 231 - Normal
05/29/2026 12 AM PDT 2.03 231 0 Normal
05/29/2026 01 AM PDT 2.03 231 0 Normal
05/29/2026 02 AM PDT 2.03 231 0 Normal
05/29/2026 03 AM PDT 2.03 231 0 Normal
05/29/2026 04 AM PDT 2.03 231 0 Normal
05/29/2026 05 AM PDT 2.04 232 + Normal
05/29/2026 06 AM PDT 2.04 232 0 Normal
05/29/2026 07 AM PDT 2.04 232 0 Normal
05/29/2026 08 AM PDT 2.04 232 0 Normal
05/29/2026 09 AM PDT 2.04 232 0 Normal
05/29/2026 10 AM PDT 2.04 232 0 Normal
05/29/2026 11 AM PDT 2.04 232 0 Normal
05/29/2026 12 PM PDT 2.04 232 0 Normal
05/29/2026 01 PM PDT 2.03 231 - Normal
05/29/2026 02 PM PDT 2.03 231 0 Normal
05/29/2026 03 PM PDT 2.02 229 - Normal
05/29/2026 04 PM PDT 2.02 229 0 Normal
05/29/2026 05 PM PDT 2.01 228 - Normal
05/29/2026 06 PM PDT 2.01 228 0 Normal
05/29/2026 07 PM PDT 2.01 228 0 Normal
05/29/2026 08 PM PDT 2.00 226 - Normal
05/29/2026 09 PM PDT 1.99 225 - Normal
05/29/2026 10 PM PDT 1.99 225 0 Normal
05/29/2026 11 PM PDT 1.98 223 - Normal
05/30/2026 12 AM PDT 1.97 222 - Normal
05/30/2026 01 AM PDT 1.96 220 - Normal
05/30/2026 02 AM PDT 1.96 220 0 Normal
05/30/2026 03 AM PDT 1.95 218 - Normal
05/30/2026 04 AM PDT 1.94 217 - Normal
05/30/2026 05 AM PDT 1.94 217 0 Normal
05/30/2026 06 AM PDT 1.93 215 - Normal
05/30/2026 07 AM PDT 1.92 214 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/30/2026 08 AM PDT 1.92 214 Normal
05/30/2026 09 AM PDT 1.91 212 - Normal
05/30/2026 10 AM PDT 1.90 211 - Normal
05/30/2026 11 AM PDT 1.89 209 - Normal
05/30/2026 12 PM PDT 1.89 209 0 Normal
05/30/2026 01 PM PDT 1.88 208 - Normal
05/30/2026 02 PM PDT 1.88 208 0 Normal
05/30/2026 03 PM PDT 1.87 206 - Normal
05/30/2026 04 PM PDT 1.87 206 0 Normal
05/30/2026 05 PM PDT 1.86 205 - Normal
05/30/2026 06 PM PDT 1.85 204 - Normal
05/30/2026 07 PM PDT 1.85 204 0 Normal
05/30/2026 08 PM PDT 1.84 202 - Normal
05/30/2026 09 PM PDT 1.84 202 0 Normal
05/30/2026 10 PM PDT 1.83 201 - Normal
05/30/2026 11 PM PDT 1.83 201 0 Normal
05/31/2026 12 AM PDT 1.82 199 - Normal
05/31/2026 01 AM PDT 1.82 199 0 Normal
05/31/2026 02 AM PDT 1.82 199 0 Normal
05/31/2026 03 AM PDT 1.81 198 - Normal
05/31/2026 04 AM PDT 1.81 198 0 Normal
05/31/2026 05 AM PDT 1.80 196 - Normal
05/31/2026 06 AM PDT 1.80 196 0 Normal
05/31/2026 07 AM PDT 1.80 196 0 Normal
05/31/2026 08 AM PDT 1.80 196 0 Normal
05/31/2026 09 AM PDT 1.79 195 - Normal
05/31/2026 10 AM PDT 1.79 195 0 Normal
05/31/2026 11 AM PDT 1.79 195 0 Normal
05/31/2026 12 PM PDT 1.79 195 0 Normal
05/31/2026 01 PM PDT 1.79 195 0 Normal
05/31/2026 02 PM PDT 1.78 193 - Normal
05/31/2026 03 PM PDT 1.78 193 0 Normal
05/31/2026 04 PM PDT 1.78 193 0 Normal
05/31/2026 05 PM PDT 1.78 193 0 Normal
05/31/2026 06 PM PDT 1.77 192 - Normal
05/31/2026 07 PM PDT 1.77 192 0 Normal
05/31/2026 08 PM PDT 1.77 192 0 Normal
05/31/2026 09 PM PDT 1.77 192 0 Normal
05/31/2026 10 PM PDT 1.77 192 0 Normal
05/31/2026 11 PM PDT 1.77 192 0 Normal
06/01/2026 12 AM PDT 1.77 192 0 Normal
06/01/2026 01 AM PDT 1.77 192 0 Normal
06/01/2026 02 AM PDT 1.76 191 - Normal
06/01/2026 03 AM PDT 1.76 191 0 Normal
06/01/2026 04 AM PDT 1.76 191 0 Normal
06/01/2026 05 AM PDT 1.76 191 0 Normal
06/01/2026 06 AM PDT 1.76 191 0 Normal
06/01/2026 07 AM PDT 1.76 191 0 Normal
06/01/2026 08 AM PDT 1.76 191 0 Normal
06/01/2026 09 AM PDT 1.75 189 - Normal
06/01/2026 10 AM PDT 1.75 189 0 Normal
06/01/2026 11 AM PDT 1.75 189 0 Normal
06/01/2026 12 PM PDT 1.75 189 0 Normal
06/01/2026 01 PM PDT 1.75 189 0 Normal
06/01/2026 02 PM PDT 1.75 189 0 Normal
06/01/2026 03 PM PDT 1.75 189 0 Normal
06/01/2026 04 PM PDT 1.74 188 - Normal
06/01/2026 05 PM PDT 1.74 188 0 Normal
06/01/2026 06 PM PDT 1.74 188 0 Normal
06/01/2026 07 PM PDT 1.74 188 0 Normal
06/01/2026 08 PM PDT 1.73 186 - Normal
06/01/2026 09 PM PDT 1.73 186 0 Normal
06/01/2026 10 PM PDT 1.73 186 0 Normal
06/01/2026 11 PM PDT 1.73 186 0 Normal
06/02/2026 12 AM PDT 1.73 186 0 Normal
06/02/2026 01 AM PDT 1.73 186 0 Normal
06/02/2026 02 AM PDT 1.73 186 0 Normal
06/02/2026 03 AM PDT 1.73 186 0 Normal
06/02/2026 04 AM PDT 1.73 186 0 Normal
06/02/2026 05 AM PDT 1.72 185 - Normal
06/02/2026 06 AM PDT 1.72 185 0 Normal
06/02/2026 07 AM PDT 1.72 185 0 Normal
06/02/2026 08 AM PDT 1.72 185 0 Normal
06/02/2026 09 AM PDT 1.72 185 0 Normal
06/02/2026 10 AM PDT 1.72 185 0 Normal
06/02/2026 11 AM PDT 1.72 185 0 Normal
06/02/2026 12 PM PDT 1.71 184 - Normal
06/02/2026 01 PM PDT 1.71 184 0 Normal
06/02/2026 02 PM PDT 1.71 184 0 Normal
06/02/2026 03 PM PDT 1.71 184 0 Normal
06/02/2026 04 PM PDT 1.71 184 0 Normal
06/02/2026 05 PM PDT 1.71 184 0 Normal
06/02/2026 06 PM PDT 1.70 182 - Normal
06/02/2026 07 PM PDT 1.70 182 0 Normal
06/02/2026 08 PM PDT 1.70 182 0 Normal
06/02/2026 09 PM PDT 1.70 182 0 Normal
06/02/2026 10 PM PDT 1.70 182 0 Normal
06/02/2026 11 PM PDT 1.70 182 0 Normal
06/03/2026 12 AM PDT 1.70 182 0 Normal
06/03/2026 01 AM PDT 1.69 181 - Normal
06/03/2026 02 AM PDT 1.69 181 0 Normal
06/03/2026 03 AM PDT 1.69 181 0 Normal
06/03/2026 04 AM PDT 1.69 181 0 Normal
06/03/2026 05 AM PDT 1.69 181 0 Normal
06/03/2026 06 AM PDT 1.69 181 0 Normal
06/03/2026 07 AM PDT 1.69 181 0 Normal
06/03/2026 08 AM PDT 1.69 181 0 Normal
06/03/2026 09 AM PDT 1.69 181 0 Normal
06/03/2026 10 AM PDT 1.68 180 - Normal
06/03/2026 11 AM PDT 1.68 180 0 Normal
06/03/2026 12 PM PDT 1.68 180 0 Normal
06/03/2026 01 PM PDT 1.68 180 0 Normal
06/03/2026 02 PM PDT 1.68 180 0 Normal
06/03/2026 03 PM PDT 1.68 180 0 Normal
06/03/2026 04 PM PDT 1.68 180 0 Normal
06/03/2026 05 PM PDT 1.68 180 0 Normal
06/03/2026 06 PM PDT 1.67 178 - Normal
06/03/2026 07 PM PDT 1.67 178 0 Normal
06/03/2026 08 PM PDT 1.67 178 0 Normal
06/03/2026 09 PM PDT 1.67 178 0 Normal
06/03/2026 10 PM PDT 1.67 178 0 Normal
06/03/2026 11 PM PDT 1.67 178 0 Normal
06/04/2026 12 AM PDT 1.67 178 0 Normal
06/04/2026 01 AM PDT 1.67 178 0 Normal
06/04/2026 02 AM PDT 1.66 177 - Normal
06/04/2026 03 AM PDT 1.66 177 0 Normal
06/04/2026 04 AM PDT 1.66 177 0 Normal
06/04/2026 05 AM PDT 1.66 177 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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