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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: | Aug 26 2026 at 7:03 AM PDT | Next Issuance: | Aug 27 2026 at 9:00 AM PDT
| |
| 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: 08/26/2026 at 07:04 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 08/22/2026 at 05:00 PM PDT
# Maximum Observed Stage: 24.16 Feet
# Maximum Observed Flow: 95 cfs
#
# Earliest Date & Time of Maximum Forecast: 08/29/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 24.19 Feet
# Maximum Forecast Flow: 100 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
08/21/2026 07 AM PDT 24.13 90 Normal
08/21/2026 08 AM PDT 24.14 92 + Normal
08/21/2026 09 AM PDT 24.13 90 - Normal
08/21/2026 10 AM PDT 24.13 90 0 Normal
08/21/2026 11 AM PDT 24.12 88 - Normal
08/21/2026 12 PM PDT 24.13 90 + Normal
08/21/2026 01 PM PDT 24.16 95 + Normal
08/21/2026 02 PM PDT 24.15 93 - Normal
08/21/2026 03 PM PDT 24.15 93 0 Normal
08/21/2026 04 PM PDT 24.15 93 0 Normal
08/21/2026 05 PM PDT 24.15 93 0 Normal
08/21/2026 06 PM PDT 24.15 93 0 Normal
08/21/2026 07 PM PDT 24.13 90 - Normal
08/21/2026 08 PM PDT 24.14 92 + Normal
08/21/2026 09 PM PDT 24.14 92 0 Normal
08/21/2026 10 PM PDT 24.13 90 - Normal
08/21/2026 11 PM PDT 24.14 92 + Normal
08/22/2026 12 AM PDT 24.14 92 0 Normal
08/22/2026 01 AM PDT 24.14 92 0 Normal
08/22/2026 02 AM PDT 24.14 92 0 Normal
08/22/2026 03 AM PDT 24.14 92 0 Normal
08/22/2026 04 AM PDT 24.13 90 - Normal
08/22/2026 05 AM PDT 24.13 90 0 Normal
08/22/2026 06 AM PDT 24.14 92 + Normal
08/22/2026 07 AM PDT 24.13 90 - Normal
08/22/2026 08 AM PDT 24.13 90 0 Normal
08/22/2026 09 AM PDT 24.13 90 0 Normal
08/22/2026 10 AM PDT 24.15 93 + Normal
08/22/2026 11 AM PDT 24.14 92 - Normal
08/22/2026 12 PM PDT 24.15 93 + Normal
08/22/2026 01 PM PDT 24.15 93 0 Normal
08/22/2026 02 PM PDT 24.14 92 - Normal
08/22/2026 03 PM PDT 24.14 92 0 Normal
08/22/2026 04 PM PDT 24.13 90 - Normal
08/22/2026 05 PM PDT 24.16 95 + Normal
08/22/2026 06 PM PDT 24.13 90 - Normal
08/22/2026 07 PM PDT 24.12 88 - Normal
08/22/2026 08 PM PDT 24.11 87 - Normal
08/22/2026 09 PM PDT 24.12 88 + Normal
08/22/2026 10 PM PDT 24.12 88 0 Normal
08/22/2026 11 PM PDT 24.11 87 - Normal
08/23/2026 12 AM PDT 24.12 88 + Normal
08/23/2026 01 AM PDT 24.12 88 0 Normal
08/23/2026 02 AM PDT 24.12 88 0 Normal
08/23/2026 03 AM PDT 24.11 87 - Normal
08/23/2026 04 AM PDT 24.12 88 + Normal
08/23/2026 05 AM PDT 24.12 88 0 Normal
08/23/2026 06 AM PDT 24.12 88 0 Normal
08/23/2026 07 AM PDT 24.10 85 - Normal
08/23/2026 08 AM PDT 24.11 87 + Normal
08/23/2026 09 AM PDT 24.14 92 + Normal
08/23/2026 10 AM PDT 24.14 92 0 Normal
08/23/2026 11 AM PDT 24.12 88 - Normal
08/23/2026 12 PM PDT 24.12 88 0 Normal
08/23/2026 01 PM PDT 24.13 90 + Normal
08/23/2026 02 PM PDT 24.14 92 + Normal
08/23/2026 03 PM PDT 24.13 90 - Normal
08/23/2026 04 PM PDT 24.13 90 0 Normal
08/23/2026 05 PM PDT 24.11 87 - Normal
08/23/2026 06 PM PDT 24.10 85 - Normal
08/23/2026 07 PM PDT 24.09 84 - Normal
08/23/2026 08 PM PDT 24.12 88 + Normal
08/23/2026 09 PM PDT 24.11 87 - Normal
08/23/2026 10 PM PDT 24.10 85 - Normal
08/23/2026 11 PM PDT 24.11 87 + Normal
08/24/2026 12 AM PDT 24.11 87 0 Normal
08/24/2026 01 AM PDT 24.11 87 0 Normal
08/24/2026 02 AM PDT 24.11 87 0 Normal
08/24/2026 03 AM PDT 24.11 87 0 Normal
08/24/2026 04 AM PDT 24.11 87 0 Normal
08/24/2026 05 AM PDT 24.12 88 + Normal
08/24/2026 06 AM PDT 24.12 88 0 Normal
08/24/2026 07 AM PDT 24.10 85 - Normal
08/24/2026 08 AM PDT 24.11 87 + Normal
08/24/2026 09 AM PDT 24.11 87 0 Normal
08/24/2026 10 AM PDT 24.12 88 + Normal
08/24/2026 11 AM PDT 24.11 87 - Normal
08/24/2026 12 PM PDT 24.12 88 + Normal
08/24/2026 01 PM PDT 24.12 88 0 Normal
08/24/2026 02 PM PDT 24.13 90 + Normal
08/24/2026 03 PM PDT 24.11 87 - Normal
08/24/2026 04 PM PDT 24.11 87 0 Normal
08/24/2026 05 PM PDT 24.10 85 - Normal
08/24/2026 06 PM PDT 24.12 88 + Normal
08/24/2026 07 PM PDT 24.10 85 - Normal
08/24/2026 08 PM PDT 24.10 85 0 Normal
08/24/2026 09 PM PDT 24.11 87 + Normal
08/24/2026 10 PM PDT 24.11 87 0 Normal
08/24/2026 11 PM PDT 24.11 87 0 Normal
08/25/2026 12 AM PDT 24.11 87 0 Normal
08/25/2026 01 AM PDT 24.10 85 - Normal
08/25/2026 02 AM PDT 24.11 87 + Normal
08/25/2026 03 AM PDT 24.11 87 0 Normal
08/25/2026 04 AM PDT 24.09 84 - Normal
08/25/2026 05 AM PDT 24.11 87 + Normal
08/25/2026 06 AM PDT 24.12 88 + Normal
08/25/2026 07 AM PDT 24.10 85 - Normal
08/25/2026 08 AM PDT 24.11 87 + Normal
08/25/2026 09 AM PDT 24.12 88 + Normal
08/25/2026 10 AM PDT 24.12 88 0 Normal
08/25/2026 11 AM PDT 24.12 88 0 Normal
08/25/2026 12 PM PDT 24.10 85 - Normal
08/25/2026 01 PM PDT 24.11 87 + Normal
08/25/2026 02 PM PDT 24.09 84 - Normal
08/25/2026 03 PM PDT 24.11 87 + Normal
08/25/2026 04 PM PDT 24.11 87 0 Normal
08/25/2026 05 PM PDT 24.11 87 0 Normal
08/25/2026 06 PM PDT 24.11 87 0 Normal
08/25/2026 07 PM PDT 24.09 84 - Normal
08/25/2026 08 PM PDT 24.11 87 + Normal
08/25/2026 09 PM PDT 24.10 85 - Normal
08/25/2026 10 PM PDT 24.10 85 0 Normal
08/25/2026 11 PM PDT 24.10 85 0 Normal
08/26/2026 12 AM PDT 24.10 85 0 Normal
08/26/2026 01 AM PDT 24.11 87 + Normal
08/26/2026 02 AM PDT 24.10 85 - Normal
08/26/2026 03 AM PDT 24.10 85 0 Normal
08/26/2026 04 AM PDT 24.09 84 - Normal
08/26/2026 05 AM PDT 24.08 82 - Normal
08/26/2026 06 AM PDT 24.07 80 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
08/26/2026 07 AM PDT 24.07 80 Normal
08/26/2026 08 AM PDT 24.07 80 0 Normal
08/26/2026 09 AM PDT 24.07 80 0 Normal
08/26/2026 10 AM PDT 24.08 82 + Normal
08/26/2026 11 AM PDT 24.08 82 0 Normal
08/26/2026 12 PM PDT 24.09 84 + Normal
08/26/2026 01 PM PDT 24.09 84 0 Normal
08/26/2026 02 PM PDT 24.10 85 + Normal
08/26/2026 03 PM PDT 24.10 85 0 Normal
08/26/2026 04 PM PDT 24.11 87 + Normal
08/26/2026 05 PM PDT 24.11 87 0 Normal
08/26/2026 06 PM PDT 24.12 88 + Normal
08/26/2026 07 PM PDT 24.13 90 + Normal
08/26/2026 08 PM PDT 24.13 90 0 Normal
08/26/2026 09 PM PDT 24.14 92 + Normal
08/26/2026 10 PM PDT 24.14 92 0 Normal
08/26/2026 11 PM PDT 24.15 93 + Normal
08/27/2026 12 AM PDT 24.15 93 0 Normal
08/27/2026 01 AM PDT 24.16 95 + Normal
08/27/2026 02 AM PDT 24.16 95 0 Normal
08/27/2026 03 AM PDT 24.16 95 0 Normal
08/27/2026 04 AM PDT 24.16 95 0 Normal
08/27/2026 05 AM PDT 24.17 97 + Normal
08/27/2026 06 AM PDT 24.17 97 0 Normal
08/27/2026 07 AM PDT 24.17 97 0 Normal
08/27/2026 08 AM PDT 24.17 97 0 Normal
08/27/2026 09 AM PDT 24.17 97 0 Normal
08/27/2026 10 AM PDT 24.18 98 + Normal
08/27/2026 11 AM PDT 24.18 98 0 Normal
08/27/2026 12 PM PDT 24.18 98 0 Normal
08/27/2026 01 PM PDT 24.18 98 0 Normal
08/27/2026 02 PM PDT 24.18 98 0 Normal
08/27/2026 03 PM PDT 24.18 98 0 Normal
08/27/2026 04 PM PDT 24.18 98 0 Normal
08/27/2026 05 PM PDT 24.18 98 0 Normal
08/27/2026 06 PM PDT 24.18 98 0 Normal
08/27/2026 07 PM PDT 24.18 98 0 Normal
08/27/2026 08 PM PDT 24.18 98 0 Normal
08/27/2026 09 PM PDT 24.18 98 0 Normal
08/27/2026 10 PM PDT 24.18 98 0 Normal
08/27/2026 11 PM PDT 24.18 98 0 Normal
08/28/2026 12 AM PDT 24.18 98 0 Normal
08/28/2026 01 AM PDT 24.18 98 0 Normal
08/28/2026 02 AM PDT 24.18 98 0 Normal
08/28/2026 03 AM PDT 24.18 98 0 Normal
08/28/2026 04 AM PDT 24.18 98 0 Normal
08/28/2026 05 AM PDT 24.18 98 0 Normal
08/28/2026 06 AM PDT 24.18 98 0 Normal
08/28/2026 07 AM PDT 24.18 98 0 Normal
08/28/2026 08 AM PDT 24.18 98 0 Normal
08/28/2026 09 AM PDT 24.18 98 0 Normal
08/28/2026 10 AM PDT 24.18 98 0 Normal
08/28/2026 11 AM PDT 24.18 98 0 Normal
08/28/2026 12 PM PDT 24.18 98 0 Normal
08/28/2026 01 PM PDT 24.18 98 0 Normal
08/28/2026 02 PM PDT 24.18 98 0 Normal
08/28/2026 03 PM PDT 24.18 98 0 Normal
08/28/2026 04 PM PDT 24.18 98 0 Normal
08/28/2026 05 PM PDT 24.18 98 0 Normal
08/28/2026 06 PM PDT 24.18 98 0 Normal
08/28/2026 07 PM PDT 24.18 98 0 Normal
08/28/2026 08 PM PDT 24.18 98 0 Normal
08/28/2026 09 PM PDT 24.18 98 0 Normal
08/28/2026 10 PM PDT 24.18 98 0 Normal
08/28/2026 11 PM PDT 24.18 98 0 Normal
08/29/2026 12 AM PDT 24.18 98 0 Normal
08/29/2026 01 AM PDT 24.18 98 0 Normal
08/29/2026 02 AM PDT 24.18 98 0 Normal
08/29/2026 03 AM PDT 24.18 98 0 Normal
08/29/2026 04 AM PDT 24.18 98 0 Normal
08/29/2026 05 AM PDT 24.18 98 0 Normal
08/29/2026 06 AM PDT 24.18 98 0 Normal
08/29/2026 07 AM PDT 24.18 98 0 Normal
08/29/2026 08 AM PDT 24.19 100 + Normal
08/29/2026 09 AM PDT 24.19 100 0 Normal
08/29/2026 10 AM PDT 24.19 100 0 Normal
08/29/2026 11 AM PDT 24.19 100 0 Normal
08/29/2026 12 PM PDT 24.19 100 0 Normal
08/29/2026 01 PM PDT 24.19 100 0 Normal
08/29/2026 02 PM PDT 24.19 100 0 Normal
08/29/2026 03 PM PDT 24.19 100 0 Normal
08/29/2026 04 PM PDT 24.19 100 0 Normal
08/29/2026 05 PM PDT 24.19 100 0 Normal
08/29/2026 06 PM PDT 24.19 100 0 Normal
08/29/2026 07 PM PDT 24.19 100 0 Normal
08/29/2026 08 PM PDT 24.19 100 0 Normal
08/29/2026 09 PM PDT 24.19 100 0 Normal
08/29/2026 10 PM PDT 24.19 100 0 Normal
08/29/2026 11 PM PDT 24.19 100 0 Normal
08/30/2026 12 AM PDT 24.19 100 0 Normal
08/30/2026 01 AM PDT 24.19 100 0 Normal
08/30/2026 02 AM PDT 24.19 100 0 Normal
08/30/2026 03 AM PDT 24.19 100 0 Normal
08/30/2026 04 AM PDT 24.19 100 0 Normal
08/30/2026 05 AM PDT 24.19 100 0 Normal
08/30/2026 06 AM PDT 24.19 100 0 Normal
08/30/2026 07 AM PDT 24.19 100 0 Normal
08/30/2026 08 AM PDT 24.19 100 0 Normal
08/30/2026 09 AM PDT 24.18 98 - Normal
08/30/2026 10 AM PDT 24.18 98 0 Normal
08/30/2026 11 AM PDT 24.18 98 0 Normal
08/30/2026 12 PM PDT 24.18 98 0 Normal
08/30/2026 01 PM PDT 24.18 98 0 Normal
08/30/2026 02 PM PDT 24.18 98 0 Normal
08/30/2026 03 PM PDT 24.19 100 + Normal
08/30/2026 04 PM PDT 24.19 100 0 Normal
08/30/2026 05 PM PDT 24.19 100 0 Normal
08/30/2026 06 PM PDT 24.19 100 0 Normal
08/30/2026 07 PM PDT 24.19 100 0 Normal
08/30/2026 08 PM PDT 24.19 100 0 Normal
08/30/2026 09 PM PDT 24.19 100 0 Normal
08/30/2026 10 PM PDT 24.19 100 0 Normal
08/30/2026 11 PM PDT 24.19 100 0 Normal
08/31/2026 12 AM PDT 24.19 100 0 Normal
08/31/2026 01 AM PDT 24.19 100 0 Normal
08/31/2026 02 AM PDT 24.19 100 0 Normal
08/31/2026 03 AM PDT 24.19 100 0 Normal
08/31/2026 04 AM PDT 24.19 100 0 Normal
08/31/2026 05 AM PDT 24.18 98 - 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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