National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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RUSSIAN RIVER - HACIENDA BRIDGE (RIOC1)
Latitude: 38.51º NLongitude: 122.93º WElevation: 20 FeetForecast Type: Unofficial Location
Location: Sonoma County in CaliforniaBulletin Group: Russian NapaRiver Group: Russian Napa
Issuance Time: May 05 2026 at 7:15 AM PDTNext Issuance: May 06 2026 at 9:00 AM PDT
Action/Monitor: 31.0 FeetMinor Flood: 34.0 FeetModerate Flood: N/A Major Flood: N/A


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Russian River - Hacienda Bridge (RIOC1)
#
# File Generation Time:  05/05/2026 at 07:16 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/30/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       3.71 Feet
# Maximum Observed Flow:                        579 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/05/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       3.31 Feet
# Maximum Forecast Flow:                        488 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/30/2026 07 AM PDT            3.71            579                        Normal
  04/30/2026 08 AM PDT            3.71            579         0              Normal
  04/30/2026 09 AM PDT            3.70            577         -              Normal
  04/30/2026 10 AM PDT            3.69            575         -              Normal
  04/30/2026 11 AM PDT            3.69            575         0              Normal
  04/30/2026 12 PM PDT            3.69            575         0              Normal
  04/30/2026 01 PM PDT            3.68            572         -              Normal
  04/30/2026 02 PM PDT            3.68            572         0              Normal
  04/30/2026 03 PM PDT            3.68            572         0              Normal
  04/30/2026 04 PM PDT            3.67            570         -              Normal
  04/30/2026 05 PM PDT            3.66            568         -              Normal
  04/30/2026 06 PM PDT            3.66            568         0              Normal
  04/30/2026 07 PM PDT            3.66            568         0              Normal
  04/30/2026 08 PM PDT            3.64            563         -              Normal
  04/30/2026 09 PM PDT            3.63            561         -              Normal
  04/30/2026 10 PM PDT            3.63            561         0              Normal
  04/30/2026 11 PM PDT            3.61            556         -              Normal
  05/01/2026 12 AM PDT            3.61            556         0              Normal
  05/01/2026 01 AM PDT            3.60            554         -              Normal
  05/01/2026 02 AM PDT            3.60            554         0              Normal
  05/01/2026 03 AM PDT            3.58            549         -              Normal
  05/01/2026 04 AM PDT            3.58            549         0              Normal
  05/01/2026 05 AM PDT            3.58            549         0              Normal
  05/01/2026 06 AM PDT            3.57            547         -              Normal
  05/01/2026 07 AM PDT            3.56            545         -              Normal
  05/01/2026 08 AM PDT            3.56            545         0              Normal
  05/01/2026 09 AM PDT            3.56            545         0              Normal
  05/01/2026 10 AM PDT            3.55            542         -              Normal
  05/01/2026 11 AM PDT            3.55            542         0              Normal
  05/01/2026 12 PM PDT            3.54            540         -              Normal
  05/01/2026 01 PM PDT            3.54            540         0              Normal
  05/01/2026 02 PM PDT            3.53            538         -              Normal
  05/01/2026 03 PM PDT            3.53            538         0              Normal
  05/01/2026 04 PM PDT            3.53            538         0              Normal
  05/01/2026 05 PM PDT            3.52            536         -              Normal
  05/01/2026 06 PM PDT            3.52            536         0              Normal
  05/01/2026 07 PM PDT            3.52            536         0              Normal
  05/01/2026 08 PM PDT            3.51            533         -              Normal
  05/01/2026 09 PM PDT            3.50            531         -              Normal
  05/01/2026 10 PM PDT            3.50            531         0              Normal
  05/01/2026 11 PM PDT            3.49            529         -              Normal
  05/02/2026 12 AM PDT            3.48            527         -              Normal
  05/02/2026 01 AM PDT            3.48            527         0              Normal
  05/02/2026 02 AM PDT            3.47            524         -              Normal
  05/02/2026 03 AM PDT            3.46            522         -              Normal
  05/02/2026 04 AM PDT            3.46            522         0              Normal
  05/02/2026 05 AM PDT            3.45            520         -              Normal
  05/02/2026 06 AM PDT            3.45            520         0              Normal
  05/02/2026 07 AM PDT            3.45            520         0              Normal
  05/02/2026 08 AM PDT            3.45            520         0              Normal
  05/02/2026 09 AM PDT            3.44            518         -              Normal
  05/02/2026 10 AM PDT            3.44            518         0              Normal
  05/02/2026 11 AM PDT            3.44            518         0              Normal
  05/02/2026 12 PM PDT            3.44            518         0              Normal
  05/02/2026 01 PM PDT            3.44            518         0              Normal
  05/02/2026 02 PM PDT            3.42            513         -              Normal
  05/02/2026 03 PM PDT            3.42            513         0              Normal
  05/02/2026 04 PM PDT            3.42            513         0              Normal
  05/02/2026 05 PM PDT            3.42            513         0              Normal
  05/02/2026 06 PM PDT            3.41            511         -              Normal
  05/02/2026 07 PM PDT            3.41            511         0              Normal
  05/02/2026 08 PM PDT            3.41            511         0              Normal
  05/02/2026 09 PM PDT            3.40            509         -              Normal
  05/02/2026 10 PM PDT            3.40            509         0              Normal
  05/02/2026 11 PM PDT            3.40            509         0              Normal
  05/03/2026 12 AM PDT            3.39            507         -              Normal
  05/03/2026 01 AM PDT            3.39            507         0              Normal
  05/03/2026 02 AM PDT            3.38            505         -              Normal
  05/03/2026 03 AM PDT            3.38            505         0              Normal
  05/03/2026 04 AM PDT            3.38            505         0              Normal
  05/03/2026 05 AM PDT            3.38            505         0              Normal
  05/03/2026 06 AM PDT            3.37            502         -              Normal
  05/03/2026 07 AM PDT            3.37            502         0              Normal
  05/03/2026 08 AM PDT            3.36            500         -              Normal
  05/03/2026 09 AM PDT            3.36            500         0              Normal
  05/03/2026 10 AM PDT            3.36            500         0              Normal
  05/03/2026 11 AM PDT            3.35            498         -              Normal
  05/03/2026 12 PM PDT            3.36            500         +              Normal
  05/03/2026 01 PM PDT            3.35            498         -              Normal
  05/03/2026 02 PM PDT            3.35            498         0              Normal
  05/03/2026 03 PM PDT            3.35            498         0              Normal
  05/03/2026 04 PM PDT            3.35            498         0              Normal
  05/03/2026 05 PM PDT            3.33            493         -              Normal
  05/03/2026 06 PM PDT            3.33            493         0              Normal
  05/03/2026 07 PM PDT            3.33            493         0              Normal
  05/03/2026 08 PM PDT            3.33            493         0              Normal
  05/03/2026 09 PM PDT            3.32            491         -              Normal
  05/03/2026 10 PM PDT            3.32            491         0              Normal
  05/03/2026 11 PM PDT            3.31            488         -              Normal
  05/04/2026 12 AM PDT            3.30            486         -              Normal
  05/04/2026 01 AM PDT            3.31            488         +              Normal
  05/04/2026 02 AM PDT            3.30            486         -              Normal
  05/04/2026 03 AM PDT            3.29            483         -              Normal
  05/04/2026 04 AM PDT            3.29            483         0              Normal
  05/04/2026 05 AM PDT            3.28            481         -              Normal
  05/04/2026 06 AM PDT            3.28            481         0              Normal
  05/04/2026 07 AM PDT            3.27            478         -              Normal
  05/04/2026 08 AM PDT            3.27            478         0              Normal
  05/04/2026 09 AM PDT            3.27            478         0              Normal
  05/04/2026 10 AM PDT            3.27            478         0              Normal
  05/04/2026 11 AM PDT            3.27            478         0              Normal
  05/04/2026 12 PM PDT            3.26            476         -              Normal
  05/04/2026 01 PM PDT            3.26            476         0              Normal
  05/04/2026 02 PM PDT            3.25            474         -              Normal
  05/04/2026 03 PM PDT            3.25            474         0              Normal
  05/04/2026 04 PM PDT            3.26            476         +              Normal
  05/04/2026 05 PM PDT            3.26            476         0              Normal
  05/04/2026 06 PM PDT            3.26            476         0              Normal
  05/04/2026 07 PM PDT            3.26            476         0              Normal
  05/04/2026 08 PM PDT            3.27            478         +              Normal
  05/04/2026 09 PM PDT            3.27            478         0              Normal
  05/04/2026 10 PM PDT            3.26            476         -              Normal
  05/04/2026 11 PM PDT            3.26            476         0              Normal
  05/05/2026 12 AM PDT            3.27            478         +              Normal
  05/05/2026 01 AM PDT            3.28            481         +              Normal
  05/05/2026 02 AM PDT            3.27            478         -              Normal
  05/05/2026 03 AM PDT            3.27            478         0              Normal
  05/05/2026 04 AM PDT            3.27            478         0              Normal
  05/05/2026 05 AM PDT            3.28            481         +              Normal
  05/05/2026 06 AM PDT            3.29            483         +              Normal
  05/05/2026 07 AM PDT            3.29            483         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/05/2026 08 AM PDT            3.30            486                        Normal
  05/05/2026 09 AM PDT            3.31            488         +              Normal
  05/05/2026 10 AM PDT            3.31            488         0              Normal
  05/05/2026 11 AM PDT            3.31            488         0              Normal
  05/05/2026 12 PM PDT            3.31            488         0              Normal
  05/05/2026 01 PM PDT            3.31            488         0              Normal
  05/05/2026 02 PM PDT            3.31            488         0              Normal
  05/05/2026 03 PM PDT            3.31            488         0              Normal
  05/05/2026 04 PM PDT            3.30            486         -              Normal
  05/05/2026 05 PM PDT            3.30            486         0              Normal
  05/05/2026 06 PM PDT            3.28            481         -              Normal
  05/05/2026 07 PM PDT            3.28            481         0              Normal
  05/05/2026 08 PM PDT            3.27            478         -              Normal
  05/05/2026 09 PM PDT            3.26            476         -              Normal
  05/05/2026 10 PM PDT            3.25            474         -              Normal
  05/05/2026 11 PM PDT            3.24            471         -              Normal
  05/06/2026 12 AM PDT            3.23            469         -              Normal
  05/06/2026 01 AM PDT            3.22            466         -              Normal
  05/06/2026 02 AM PDT            3.21            464         -              Normal
  05/06/2026 03 AM PDT            3.20            461         -              Normal
  05/06/2026 04 AM PDT            3.19            459         -              Normal
  05/06/2026 05 AM PDT            3.19            459         0              Normal
  05/06/2026 06 AM PDT            3.18            457         -              Normal
  05/06/2026 07 AM PDT            3.17            454         -              Normal
  05/06/2026 08 AM PDT            3.17            454         0              Normal
  05/06/2026 09 AM PDT            3.16            452         -              Normal
  05/06/2026 10 AM PDT            3.15            450         -              Normal
  05/06/2026 11 AM PDT            3.15            450         0              Normal
  05/06/2026 12 PM PDT            3.14            447         -              Normal
  05/06/2026 01 PM PDT            3.14            447         0              Normal
  05/06/2026 02 PM PDT            3.13            445         -              Normal
  05/06/2026 03 PM PDT            3.13            445         0              Normal
  05/06/2026 04 PM PDT            3.12            443         -              Normal
  05/06/2026 05 PM PDT            3.12            443         0              Normal
  05/06/2026 06 PM PDT            3.11            440         -              Normal
  05/06/2026 07 PM PDT            3.10            438         -              Normal
  05/06/2026 08 PM PDT            3.10            438         0              Normal
  05/06/2026 09 PM PDT            3.10            438         0              Normal
  05/06/2026 10 PM PDT            3.09            436         -              Normal
  05/06/2026 11 PM PDT            3.09            436         0              Normal
  05/07/2026 12 AM PDT            3.08            433         -              Normal
  05/07/2026 01 AM PDT            3.08            433         0              Normal
  05/07/2026 02 AM PDT            3.08            433         0              Normal
  05/07/2026 03 AM PDT            3.08            433         0              Normal
  05/07/2026 04 AM PDT            3.07            431         -              Normal
  05/07/2026 05 AM PDT            3.07            431         0              Normal
  05/07/2026 06 AM PDT            3.06            429         -              Normal
  05/07/2026 07 AM PDT            3.06            429         0              Normal
  05/07/2026 08 AM PDT            3.06            429         0              Normal
  05/07/2026 09 AM PDT            3.05            427         -              Normal
  05/07/2026 10 AM PDT            3.05            427         0              Normal
  05/07/2026 11 AM PDT            3.05            427         0              Normal
  05/07/2026 12 PM PDT            3.04            424         -              Normal
  05/07/2026 01 PM PDT            3.04            424         0              Normal
  05/07/2026 02 PM PDT            3.04            424         0              Normal
  05/07/2026 03 PM PDT            3.03            422         -              Normal
  05/07/2026 04 PM PDT            3.03            422         0              Normal
  05/07/2026 05 PM PDT            3.03            422         0              Normal
  05/07/2026 06 PM PDT            3.02            420         -              Normal
  05/07/2026 07 PM PDT            3.01            417         -              Normal
  05/07/2026 08 PM PDT            3.01            417         0              Normal
  05/07/2026 09 PM PDT            3.01            417         0              Normal
  05/07/2026 10 PM PDT            3.00            415         -              Normal
  05/07/2026 11 PM PDT            3.00            415         0              Normal
  05/08/2026 12 AM PDT            3.00            415         0              Normal
  05/08/2026 01 AM PDT            2.99            413         -              Normal
  05/08/2026 02 AM PDT            2.99            413         0              Normal
  05/08/2026 03 AM PDT            2.99            413         0              Normal
  05/08/2026 04 AM PDT            2.98            411         -              Normal
  05/08/2026 05 AM PDT            2.98            411         0              Normal
  05/08/2026 06 AM PDT            2.98            411         0              Normal
  05/08/2026 07 AM PDT            2.98            411         0              Normal
  05/08/2026 08 AM PDT            2.97            409         -              Normal
  05/08/2026 09 AM PDT            2.97            409         0              Normal
  05/08/2026 10 AM PDT            2.97            409         0              Normal
  05/08/2026 11 AM PDT            2.96            406         -              Normal
  05/08/2026 12 PM PDT            2.96            406         0              Normal
  05/08/2026 01 PM PDT            2.96            406         0              Normal
  05/08/2026 02 PM PDT            2.96            406         0              Normal
  05/08/2026 03 PM PDT            2.95            404         -              Normal
  05/08/2026 04 PM PDT            2.95            404         0              Normal
  05/08/2026 05 PM PDT            2.95            404         0              Normal
  05/08/2026 06 PM PDT            2.94            402         -              Normal
  05/08/2026 07 PM PDT            2.93            400         -              Normal
  05/08/2026 08 PM PDT            2.93            400         0              Normal
  05/08/2026 09 PM PDT            2.93            400         0              Normal
  05/08/2026 10 PM PDT            2.93            400         0              Normal
  05/08/2026 11 PM PDT            2.92            398         -              Normal
  05/09/2026 12 AM PDT            2.92            398         0              Normal
  05/09/2026 01 AM PDT            2.92            398         0              Normal
  05/09/2026 02 AM PDT            2.92            398         0              Normal
  05/09/2026 03 AM PDT            2.91            395         -              Normal
  05/09/2026 04 AM PDT            2.91            395         0              Normal
  05/09/2026 05 AM PDT            2.91            395         0              Normal
  05/09/2026 06 AM PDT            2.91            395         0              Normal
  05/09/2026 07 AM PDT            2.90            393         -              Normal
  05/09/2026 08 AM PDT            2.90            393         0              Normal
  05/09/2026 09 AM PDT            2.90            393         0              Normal
  05/09/2026 10 AM PDT            2.90            393         0              Normal
  05/09/2026 11 AM PDT            2.89            391         -              Normal
  05/09/2026 12 PM PDT            2.89            391         0              Normal
  05/09/2026 01 PM PDT            2.89            391         0              Normal
  05/09/2026 02 PM PDT            2.89            391         0              Normal
  05/09/2026 03 PM PDT            2.88            389         -              Normal
  05/09/2026 04 PM PDT            2.88            389         0              Normal
  05/09/2026 05 PM PDT            2.88            389         0              Normal
  05/09/2026 06 PM PDT            2.87            387         -              Normal
  05/09/2026 07 PM PDT            2.87            387         0              Normal
  05/09/2026 08 PM PDT            2.87            387         0              Normal
  05/09/2026 09 PM PDT            2.86            385         -              Normal
  05/09/2026 10 PM PDT            2.86            385         0              Normal
  05/09/2026 11 PM PDT            2.86            385         0              Normal
  05/10/2026 12 AM PDT            2.86            385         0              Normal
  05/10/2026 01 AM PDT            2.85            382         -              Normal
  05/10/2026 02 AM PDT            2.85            382         0              Normal
  05/10/2026 03 AM PDT            2.85            382         0              Normal
  05/10/2026 04 AM PDT            2.85            382         0              Normal
  05/10/2026 05 AM PDT            2.85            382         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.