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RUSSIAN RIVER - GEYSERVILLE (GEYC1)
| Latitude: 38.71º N | Longitude: 122.89º W | Elevation: 190 Feet | | Forecast Type: Unofficial Location |
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | May 18 2026 at 7:24 AM PDT | Next Issuance: | May 19 2026 at 9:00 AM PDT
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| Action/Monitor: 38.0 Feet | Minor Flood: 39.7 Feet | Moderate Flood: 46.0 Feet | Major Flood: 50.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Russian River - Geyserville (GEYC1)
#
# File Generation Time: 05/18/2026 at 07:25 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/13/2026 at 04:00 PM PDT
# Maximum Observed Stage: 24.59 Feet
# Maximum Observed Flow: 181 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/18/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 24.45 Feet
# Maximum Forecast Flow: 150 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/13/2026 07 AM PDT 24.58 179 Normal
05/13/2026 08 AM PDT 24.56 174 - Normal
05/13/2026 09 AM PDT 24.56 174 0 Normal
05/13/2026 10 AM PDT 24.57 177 + Normal
05/13/2026 11 AM PDT 24.58 179 + Normal
05/13/2026 12 PM PDT 24.59 181 + Normal
05/13/2026 01 PM PDT 24.58 179 - Normal
05/13/2026 02 PM PDT 24.58 179 0 Normal
05/13/2026 03 PM PDT 24.57 177 - Normal
05/13/2026 04 PM PDT 24.59 181 + Normal
05/13/2026 05 PM PDT 24.57 177 - Normal
05/13/2026 06 PM PDT 24.57 177 0 Normal
05/13/2026 07 PM PDT 24.57 177 0 Normal
05/13/2026 08 PM PDT 24.57 177 0 Normal
05/13/2026 09 PM PDT 24.57 177 0 Normal
05/13/2026 10 PM PDT 24.57 177 0 Normal
05/13/2026 11 PM PDT 24.56 174 - Normal
05/14/2026 12 AM PDT 24.57 177 + Normal
05/14/2026 01 AM PDT 24.56 174 - Normal
05/14/2026 02 AM PDT 24.56 174 0 Normal
05/14/2026 03 AM PDT 24.56 174 0 Normal
05/14/2026 04 AM PDT 24.55 172 - Normal
05/14/2026 05 AM PDT 24.56 174 + Normal
05/14/2026 06 AM PDT 24.52 165 - Normal
05/14/2026 07 AM PDT 24.55 172 + Normal
05/14/2026 08 AM PDT 24.56 174 + Normal
05/14/2026 09 AM PDT 24.55 172 - Normal
05/14/2026 10 AM PDT 24.55 172 0 Normal
05/14/2026 11 AM PDT 24.57 177 + Normal
05/14/2026 12 PM PDT 24.56 174 - Normal
05/14/2026 01 PM PDT 24.56 174 0 Normal
05/14/2026 02 PM PDT 24.56 174 0 Normal
05/14/2026 03 PM PDT 24.55 172 - Normal
05/14/2026 04 PM PDT 24.57 177 + Normal
05/14/2026 05 PM PDT 24.56 174 - Normal
05/14/2026 06 PM PDT 24.57 177 + Normal
05/14/2026 07 PM PDT 24.56 174 - Normal
05/14/2026 08 PM PDT 24.56 174 0 Normal
05/14/2026 09 PM PDT 24.56 174 0 Normal
05/14/2026 10 PM PDT 24.56 174 0 Normal
05/14/2026 11 PM PDT 24.55 172 - Normal
05/15/2026 12 AM PDT 24.55 172 0 Normal
05/15/2026 01 AM PDT 24.54 169 - Normal
05/15/2026 02 AM PDT 24.55 172 + Normal
05/15/2026 03 AM PDT 24.55 172 0 Normal
05/15/2026 04 AM PDT 24.54 169 - Normal
05/15/2026 05 AM PDT 24.54 169 0 Normal
05/15/2026 06 AM PDT 24.54 169 0 Normal
05/15/2026 07 AM PDT 24.54 169 0 Normal
05/15/2026 08 AM PDT 24.53 167 - Normal
05/15/2026 09 AM PDT 24.53 167 0 Normal
05/15/2026 10 AM PDT 24.53 167 0 Normal
05/15/2026 11 AM PDT 24.53 167 0 Normal
05/15/2026 12 PM PDT 24.54 169 + Normal
05/15/2026 01 PM PDT 24.54 169 0 Normal
05/15/2026 02 PM PDT 24.55 172 + Normal
05/15/2026 03 PM PDT 24.53 167 - Normal
05/15/2026 04 PM PDT 24.52 165 - Normal
05/15/2026 05 PM PDT 24.51 162 - Normal
05/15/2026 06 PM PDT 24.51 162 0 Normal
05/15/2026 07 PM PDT 24.51 162 0 Normal
05/15/2026 08 PM PDT 24.51 162 0 Normal
05/15/2026 09 PM PDT 24.52 165 + Normal
05/15/2026 10 PM PDT 24.51 162 - Normal
05/15/2026 11 PM PDT 24.51 162 0 Normal
05/16/2026 12 AM PDT 24.51 162 0 Normal
05/16/2026 01 AM PDT 24.52 165 + Normal
05/16/2026 02 AM PDT 24.51 162 - Normal
05/16/2026 03 AM PDT 24.50 160 - Normal
05/16/2026 04 AM PDT 24.50 160 0 Normal
05/16/2026 05 AM PDT 24.50 160 0 Normal
05/16/2026 06 AM PDT 24.48 156 - Normal
05/16/2026 07 AM PDT 24.51 162 + Normal
05/16/2026 08 AM PDT 24.50 160 - Normal
05/16/2026 09 AM PDT 24.49 158 - Normal
05/16/2026 10 AM PDT 24.50 160 + Normal
05/16/2026 11 AM PDT 24.52 165 + Normal
05/16/2026 12 PM PDT 24.51 162 - Normal
05/16/2026 01 PM PDT 24.51 162 0 Normal
05/16/2026 02 PM PDT 24.50 160 - Normal
05/16/2026 03 PM PDT 24.51 162 + Normal
05/16/2026 04 PM PDT 24.50 160 - Normal
05/16/2026 05 PM PDT 24.50 160 0 Normal
05/16/2026 06 PM PDT 24.50 160 0 Normal
05/16/2026 07 PM PDT 24.52 165 + Normal
05/16/2026 08 PM PDT 24.53 167 + Normal
05/16/2026 09 PM PDT 24.52 165 - Normal
05/16/2026 10 PM PDT 24.51 162 - Normal
05/16/2026 11 PM PDT 24.50 160 - Normal
05/17/2026 12 AM PDT 24.50 160 0 Normal
05/17/2026 01 AM PDT 24.50 160 0 Normal
05/17/2026 02 AM PDT 24.49 158 - Normal
05/17/2026 03 AM PDT 24.49 158 0 Normal
05/17/2026 04 AM PDT 24.48 156 - Normal
05/17/2026 05 AM PDT 24.48 156 0 Normal
05/17/2026 06 AM PDT 24.48 156 0 Normal
05/17/2026 07 AM PDT 24.48 156 0 Normal
05/17/2026 08 AM PDT 24.48 156 0 Normal
05/17/2026 09 AM PDT 24.49 158 + Normal
05/17/2026 10 AM PDT 24.48 156 - Normal
05/17/2026 11 AM PDT 24.49 158 + Normal
05/17/2026 12 PM PDT 24.49 158 0 Normal
05/17/2026 01 PM PDT 24.49 158 0 Normal
05/17/2026 02 PM PDT 24.49 158 0 Normal
05/17/2026 03 PM PDT 24.49 158 0 Normal
05/17/2026 04 PM PDT 24.50 160 + Normal
05/17/2026 05 PM PDT 24.49 158 - Normal
05/17/2026 06 PM PDT 24.49 158 0 Normal
05/17/2026 07 PM PDT 24.48 156 - Normal
05/17/2026 08 PM PDT 24.48 156 0 Normal
05/17/2026 09 PM PDT 24.48 156 0 Normal
05/17/2026 10 PM PDT 24.47 154 - Normal
05/17/2026 11 PM PDT 24.48 156 + Normal
05/18/2026 12 AM PDT 24.48 156 0 Normal
05/18/2026 01 AM PDT 24.48 156 0 Normal
05/18/2026 02 AM PDT 24.48 156 0 Normal
05/18/2026 03 AM PDT 24.47 154 - Normal
05/18/2026 04 AM PDT 24.48 156 + Normal
05/18/2026 05 AM PDT 24.46 152 - Normal
05/18/2026 06 AM PDT 24.46 152 0 Normal
05/18/2026 07 AM PDT 24.46 152 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/18/2026 08 AM PDT 24.45 150 Normal
05/18/2026 09 AM PDT 24.45 150 0 Normal
05/18/2026 10 AM PDT 24.45 150 0 Normal
05/18/2026 11 AM PDT 24.45 150 0 Normal
05/18/2026 12 PM PDT 24.45 150 0 Normal
05/18/2026 01 PM PDT 24.45 150 0 Normal
05/18/2026 02 PM PDT 24.45 150 0 Normal
05/18/2026 03 PM PDT 24.45 150 0 Normal
05/18/2026 04 PM PDT 24.45 150 0 Normal
05/18/2026 05 PM PDT 24.45 150 0 Normal
05/18/2026 06 PM PDT 24.45 150 0 Normal
05/18/2026 07 PM PDT 24.45 150 0 Normal
05/18/2026 08 PM PDT 24.45 150 0 Normal
05/18/2026 09 PM PDT 24.44 147 - Normal
05/18/2026 10 PM PDT 24.44 147 0 Normal
05/18/2026 11 PM PDT 24.44 147 0 Normal
05/19/2026 12 AM PDT 24.44 147 0 Normal
05/19/2026 01 AM PDT 24.44 147 0 Normal
05/19/2026 02 AM PDT 24.44 147 0 Normal
05/19/2026 03 AM PDT 24.44 147 0 Normal
05/19/2026 04 AM PDT 24.44 147 0 Normal
05/19/2026 05 AM PDT 24.44 147 0 Normal
05/19/2026 06 AM PDT 24.44 147 0 Normal
05/19/2026 07 AM PDT 24.44 147 0 Normal
05/19/2026 08 AM PDT 24.44 147 0 Normal
05/19/2026 09 AM PDT 24.44 147 0 Normal
05/19/2026 10 AM PDT 24.44 147 0 Normal
05/19/2026 11 AM PDT 24.44 147 0 Normal
05/19/2026 12 PM PDT 24.44 147 0 Normal
05/19/2026 01 PM PDT 24.44 147 0 Normal
05/19/2026 02 PM PDT 24.44 147 0 Normal
05/19/2026 03 PM PDT 24.44 147 0 Normal
05/19/2026 04 PM PDT 24.44 147 0 Normal
05/19/2026 05 PM PDT 24.44 147 0 Normal
05/19/2026 06 PM PDT 24.43 145 - Normal
05/19/2026 07 PM PDT 24.43 145 0 Normal
05/19/2026 08 PM PDT 24.43 145 0 Normal
05/19/2026 09 PM PDT 24.43 145 0 Normal
05/19/2026 10 PM PDT 24.43 145 0 Normal
05/19/2026 11 PM PDT 24.43 145 0 Normal
05/20/2026 12 AM PDT 24.43 145 0 Normal
05/20/2026 01 AM PDT 24.43 145 0 Normal
05/20/2026 02 AM PDT 24.43 145 0 Normal
05/20/2026 03 AM PDT 24.43 145 0 Normal
05/20/2026 04 AM PDT 24.43 145 0 Normal
05/20/2026 05 AM PDT 24.43 145 0 Normal
05/20/2026 06 AM PDT 24.43 145 0 Normal
05/20/2026 07 AM PDT 24.43 145 0 Normal
05/20/2026 08 AM PDT 24.43 145 0 Normal
05/20/2026 09 AM PDT 24.42 143 - Normal
05/20/2026 10 AM PDT 24.42 143 0 Normal
05/20/2026 11 AM PDT 24.42 143 0 Normal
05/20/2026 12 PM PDT 24.42 143 0 Normal
05/20/2026 01 PM PDT 24.42 143 0 Normal
05/20/2026 02 PM PDT 24.42 143 0 Normal
05/20/2026 03 PM PDT 24.42 143 0 Normal
05/20/2026 04 PM PDT 24.42 143 0 Normal
05/20/2026 05 PM PDT 24.42 143 0 Normal
05/20/2026 06 PM PDT 24.41 141 - Normal
05/20/2026 07 PM PDT 24.41 141 0 Normal
05/20/2026 08 PM PDT 24.41 141 0 Normal
05/20/2026 09 PM PDT 24.41 141 0 Normal
05/20/2026 10 PM PDT 24.41 141 0 Normal
05/20/2026 11 PM PDT 24.41 141 0 Normal
05/21/2026 12 AM PDT 24.41 141 0 Normal
05/21/2026 01 AM PDT 24.41 141 0 Normal
05/21/2026 02 AM PDT 24.41 141 0 Normal
05/21/2026 03 AM PDT 24.41 141 0 Normal
05/21/2026 04 AM PDT 24.41 141 0 Normal
05/21/2026 05 AM PDT 24.40 139 - Normal
05/21/2026 06 AM PDT 24.40 139 0 Normal
05/21/2026 07 AM PDT 24.40 139 0 Normal
05/21/2026 08 AM PDT 24.40 139 0 Normal
05/21/2026 09 AM PDT 24.40 139 0 Normal
05/21/2026 10 AM PDT 24.40 139 0 Normal
05/21/2026 11 AM PDT 24.40 139 0 Normal
05/21/2026 12 PM PDT 24.40 139 0 Normal
05/21/2026 01 PM PDT 24.40 139 0 Normal
05/21/2026 02 PM PDT 24.40 139 0 Normal
05/21/2026 03 PM PDT 24.40 139 0 Normal
05/21/2026 04 PM PDT 24.39 137 - Normal
05/21/2026 05 PM PDT 24.39 137 0 Normal
05/21/2026 06 PM PDT 24.39 137 0 Normal
05/21/2026 07 PM PDT 24.39 137 0 Normal
05/21/2026 08 PM PDT 24.39 137 0 Normal
05/21/2026 09 PM PDT 24.39 137 0 Normal
05/21/2026 10 PM PDT 24.39 137 0 Normal
05/21/2026 11 PM PDT 24.39 137 0 Normal
05/22/2026 12 AM PDT 24.39 137 0 Normal
05/22/2026 01 AM PDT 24.38 135 - Normal
05/22/2026 02 AM PDT 24.38 135 0 Normal
05/22/2026 03 AM PDT 24.38 135 0 Normal
05/22/2026 04 AM PDT 24.38 135 0 Normal
05/22/2026 05 AM PDT 24.38 135 0 Normal
05/22/2026 06 AM PDT 24.38 135 0 Normal
05/22/2026 07 AM PDT 24.38 135 0 Normal
05/22/2026 08 AM PDT 24.38 135 0 Normal
05/22/2026 09 AM PDT 24.38 135 0 Normal
05/22/2026 10 AM PDT 24.38 135 0 Normal
05/22/2026 11 AM PDT 24.38 135 0 Normal
05/22/2026 12 PM PDT 24.38 135 0 Normal
05/22/2026 01 PM PDT 24.38 135 0 Normal
05/22/2026 02 PM PDT 24.37 133 - Normal
05/22/2026 03 PM PDT 24.37 133 0 Normal
05/22/2026 04 PM PDT 24.37 133 0 Normal
05/22/2026 05 PM PDT 24.37 133 0 Normal
05/22/2026 06 PM PDT 24.37 133 0 Normal
05/22/2026 07 PM PDT 24.37 133 0 Normal
05/22/2026 08 PM PDT 24.36 131 - Normal
05/22/2026 09 PM PDT 24.36 131 0 Normal
05/22/2026 10 PM PDT 24.36 131 0 Normal
05/22/2026 11 PM PDT 24.36 131 0 Normal
05/23/2026 12 AM PDT 24.36 131 0 Normal
05/23/2026 01 AM PDT 24.36 131 0 Normal
05/23/2026 02 AM PDT 24.36 131 0 Normal
05/23/2026 03 AM PDT 24.36 131 0 Normal
05/23/2026 04 AM PDT 24.36 131 0 Normal
05/23/2026 05 AM PDT 24.36 131 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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