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: Apr 21 2026 at 7:32 AM PDTNext Issuance: Apr 22 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:  04/21/2026 at 07:34 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/21/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       5.98 Feet
# Maximum Observed Flow:                        1338 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/22/2026 at 05:00 PM PDT
# Maximum Forecast Stage:                       7.76 Feet
# Maximum Forecast Flow:                        2186 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/16/2026 07 AM PDT            4.91            923                        Normal
  04/16/2026 08 AM PDT            4.88            912         -              Normal
  04/16/2026 09 AM PDT            4.87            909         -              Normal
  04/16/2026 10 AM PDT            4.85            902         -              Normal
  04/16/2026 11 AM PDT            4.84            898         -              Normal
  04/16/2026 12 PM PDT            4.83            895         -              Normal
  04/16/2026 01 PM PDT            4.80            884         -              Normal
  04/16/2026 02 PM PDT            4.80            884         0              Normal
  04/16/2026 03 PM PDT            4.77            874         -              Normal
  04/16/2026 04 PM PDT            4.75            867         -              Normal
  04/16/2026 05 PM PDT            4.74            864         -              Normal
  04/16/2026 06 PM PDT            4.73            860         -              Normal
  04/16/2026 07 PM PDT            4.70            850         -              Normal
  04/16/2026 08 PM PDT            4.68            843         -              Normal
  04/16/2026 09 PM PDT            4.67            840         -              Normal
  04/16/2026 10 PM PDT            4.65            833         -              Normal
  04/16/2026 11 PM PDT            4.63            826         -              Normal
  04/17/2026 12 AM PDT            4.61            819         -              Normal
  04/17/2026 01 AM PDT            4.59            813         -              Normal
  04/17/2026 02 AM PDT            4.57            806         -              Normal
  04/17/2026 03 AM PDT            4.56            803         -              Normal
  04/17/2026 04 AM PDT            4.54            797         -              Normal
  04/17/2026 05 AM PDT            4.52            791         -              Normal
  04/17/2026 06 AM PDT            4.50            785         -              Normal
  04/17/2026 07 AM PDT            4.48            779         -              Normal
  04/17/2026 08 AM PDT            4.46            773         -              Normal
  04/17/2026 09 AM PDT            4.45            770         -              Normal
  04/17/2026 10 AM PDT            4.44            767         -              Normal
  04/17/2026 11 AM PDT            4.42            761         -              Normal
  04/17/2026 12 PM PDT            4.41            758         -              Normal
  04/17/2026 01 PM PDT            4.39            752         -              Normal
  04/17/2026 02 PM PDT            4.37            747         -              Normal
  04/17/2026 03 PM PDT            4.37            747         0              Normal
  04/17/2026 04 PM PDT            4.35            741         -              Normal
  04/17/2026 05 PM PDT            4.33            735         -              Normal
  04/17/2026 06 PM PDT            4.32            732         -              Normal
  04/17/2026 07 PM PDT            4.30            726         -              Normal
  04/17/2026 08 PM PDT            4.29            723         -              Normal
  04/17/2026 09 PM PDT            4.27            717         -              Normal
  04/17/2026 10 PM PDT            4.26            715         -              Normal
  04/17/2026 11 PM PDT            4.25            712         -              Normal
  04/18/2026 12 AM PDT            4.24            709         -              Normal
  04/18/2026 01 AM PDT            4.22            703         -              Normal
  04/18/2026 02 AM PDT            4.21            700         -              Normal
  04/18/2026 03 AM PDT            4.20            697         -              Normal
  04/18/2026 04 AM PDT            4.19            695         -              Normal
  04/18/2026 05 AM PDT            4.18            692         -              Normal
  04/18/2026 06 AM PDT            4.16            686         -              Normal
  04/18/2026 07 AM PDT            4.15            683         -              Normal
  04/18/2026 08 AM PDT            4.13            678         -              Normal
  04/18/2026 09 AM PDT            4.12            675         -              Normal
  04/18/2026 10 AM PDT            4.12            675         0              Normal
  04/18/2026 11 AM PDT            4.10            669         -              Normal
  04/18/2026 12 PM PDT            4.10            669         0              Normal
  04/18/2026 01 PM PDT            4.08            664         -              Normal
  04/18/2026 02 PM PDT            4.06            658         -              Normal
  04/18/2026 03 PM PDT            4.06            658         0              Normal
  04/18/2026 04 PM PDT            4.05            655         -              Normal
  04/18/2026 05 PM PDT            4.04            653         -              Normal
  04/18/2026 06 PM PDT            4.03            650         -              Normal
  04/18/2026 07 PM PDT            4.03            650         0              Normal
  04/18/2026 08 PM PDT            4.01            644         -              Normal
  04/18/2026 09 PM PDT            4.00            642         -              Normal
  04/18/2026 10 PM PDT            4.00            642         0              Normal
  04/18/2026 11 PM PDT            3.99            639         -              Normal
  04/19/2026 12 AM PDT            3.98            636         -              Normal
  04/19/2026 01 AM PDT            3.96            631         -              Normal
  04/19/2026 02 AM PDT            3.96            631         0              Normal
  04/19/2026 03 AM PDT            3.94            625         -              Normal
  04/19/2026 04 AM PDT            3.94            625         0              Normal
  04/19/2026 05 AM PDT            3.92            620         -              Normal
  04/19/2026 06 AM PDT            3.92            620         0              Normal
  04/19/2026 07 AM PDT            3.91            617         -              Normal
  04/19/2026 08 AM PDT            3.91            617         0              Normal
  04/19/2026 09 AM PDT            3.89            612         -              Normal
  04/19/2026 10 AM PDT            3.89            612         0              Normal
  04/19/2026 11 AM PDT            3.88            609         -              Normal
  04/19/2026 12 PM PDT            3.87            607         -              Normal
  04/19/2026 01 PM PDT            3.86            604         -              Normal
  04/19/2026 02 PM PDT            3.86            604         0              Normal
  04/19/2026 03 PM PDT            3.85            602         -              Normal
  04/19/2026 04 PM PDT            3.84            599         -              Normal
  04/19/2026 05 PM PDT            3.84            599         0              Normal
  04/19/2026 06 PM PDT            3.83            597         -              Normal
  04/19/2026 07 PM PDT            3.82            594         -              Normal
  04/19/2026 08 PM PDT            3.81            592         -              Normal
  04/19/2026 09 PM PDT            3.80            589         -              Normal
  04/19/2026 10 PM PDT            3.79            586         -              Normal
  04/19/2026 11 PM PDT            3.77            581         -              Normal
  04/20/2026 12 AM PDT            3.76            579         -              Normal
  04/20/2026 01 AM PDT            3.76            579         0              Normal
  04/20/2026 02 AM PDT            3.75            576         -              Normal
  04/20/2026 03 AM PDT            3.74            574         -              Normal
  04/20/2026 04 AM PDT            3.73            571         -              Normal
  04/20/2026 05 AM PDT            3.72            569         -              Normal
  04/20/2026 06 AM PDT            3.71            566         -              Normal
  04/20/2026 07 AM PDT            3.70            564         -              Normal
  04/20/2026 08 AM PDT            3.70            564         0              Normal
  04/20/2026 09 AM PDT            3.70            564         0              Normal
  04/20/2026 10 AM PDT            3.70            564         0              Normal
  04/20/2026 11 AM PDT            3.69            562         -              Normal
  04/20/2026 12 PM PDT            3.70            564         +              Normal
  04/20/2026 01 PM PDT            3.73            571         +              Normal
  04/20/2026 02 PM PDT            3.76            579         +              Normal
  04/20/2026 03 PM PDT            3.79            586         +              Normal
  04/20/2026 04 PM PDT            3.81            592         +              Normal
  04/20/2026 05 PM PDT            3.86            604         +              Normal
  04/20/2026 06 PM PDT            3.95            628         +              Normal
  04/20/2026 07 PM PDT            4.07            661         +              Normal
  04/20/2026 08 PM PDT            4.26            715         +              Normal
  04/20/2026 09 PM PDT            4.59            813         +              Normal
  04/20/2026 10 PM PDT            4.93            930         +              Normal
  04/20/2026 11 PM PDT            5.21           1032         +              Normal
  04/21/2026 12 AM PDT            5.39           1100         +              Normal
  04/21/2026 01 AM PDT            5.50           1143         +              Normal
  04/21/2026 02 AM PDT            5.56           1166         +              Normal
  04/21/2026 03 AM PDT            5.63           1194         +              Normal
  04/21/2026 04 AM PDT            5.72           1230         +              Normal
  04/21/2026 05 AM PDT            5.85           1284         +              Normal
  04/21/2026 06 AM PDT            5.93           1317         +              Normal
  04/21/2026 07 AM PDT            5.98           1338         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/21/2026 08 AM PDT            6.00           1346                        Normal
  04/21/2026 09 AM PDT            6.03           1359         +              Normal
  04/21/2026 10 AM PDT            6.05           1368         +              Normal
  04/21/2026 11 AM PDT            6.09           1385         +              Normal
  04/21/2026 12 PM PDT            6.13           1402         +              Normal
  04/21/2026 01 PM PDT            6.19           1428         +              Normal
  04/21/2026 02 PM PDT            6.26           1458         +              Normal
  04/21/2026 03 PM PDT            6.34           1494         +              Normal
  04/21/2026 04 PM PDT            6.42           1529         +              Normal
  04/21/2026 05 PM PDT            6.48           1556         +              Normal
  04/21/2026 06 PM PDT            6.54           1584         +              Normal
  04/21/2026 07 PM PDT            6.59           1607         +              Normal
  04/21/2026 08 PM PDT            6.65           1634         +              Normal
  04/21/2026 09 PM PDT            6.71           1662         +              Normal
  04/21/2026 10 PM PDT            6.77           1690         +              Normal
  04/21/2026 11 PM PDT            6.83           1719         +              Normal
  04/22/2026 12 AM PDT            6.88           1742         +              Normal
  04/22/2026 01 AM PDT            6.93           1766         +              Normal
  04/22/2026 02 AM PDT            6.96           1781         +              Normal
  04/22/2026 03 AM PDT            6.99           1795         +              Normal
  04/22/2026 04 AM PDT            7.03           1815         +              Normal
  04/22/2026 05 AM PDT            7.08           1839         +              Normal
  04/22/2026 06 AM PDT            7.14           1868         +              Normal
  04/22/2026 07 AM PDT            7.22           1908         +              Normal
  04/22/2026 08 AM PDT            7.32           1958         +              Normal
  04/22/2026 09 AM PDT            7.41           2004         +              Normal
  04/22/2026 10 AM PDT            7.49           2045         +              Normal
  04/22/2026 11 AM PDT            7.56           2081         +              Normal
  04/22/2026 12 PM PDT            7.61           2107         +              Normal
  04/22/2026 01 PM PDT            7.65           2128         +              Normal
  04/22/2026 02 PM PDT            7.69           2149         +              Normal
  04/22/2026 03 PM PDT            7.72           2165         +              Normal
  04/22/2026 04 PM PDT            7.74           2175         +              Normal
  04/22/2026 05 PM PDT            7.76           2186         +              Normal
  04/22/2026 06 PM PDT            7.76           2186         0              Normal
  04/22/2026 07 PM PDT            7.76           2186         0              Normal
  04/22/2026 08 PM PDT            7.74           2175         -              Normal
  04/22/2026 09 PM PDT            7.70           2154         -              Normal
  04/22/2026 10 PM PDT            7.65           2128         -              Normal
  04/22/2026 11 PM PDT            7.60           2102         -              Normal
  04/23/2026 12 AM PDT            7.53           2065         -              Normal
  04/23/2026 01 AM PDT            7.46           2029         -              Normal
  04/23/2026 02 AM PDT            7.39           1994         -              Normal
  04/23/2026 03 AM PDT            7.31           1953         -              Normal
  04/23/2026 04 AM PDT            7.23           1913         -              Normal
  04/23/2026 05 AM PDT            7.15           1873         -              Normal
  04/23/2026 06 AM PDT            7.07           1834         -              Normal
  04/23/2026 07 AM PDT            6.99           1795         -              Normal
  04/23/2026 08 AM PDT            6.92           1761         -              Normal
  04/23/2026 09 AM PDT            6.84           1723         -              Normal
  04/23/2026 10 AM PDT            6.76           1686         -              Normal
  04/23/2026 11 AM PDT            6.69           1653         -              Normal
  04/23/2026 12 PM PDT            6.62           1620         -              Normal
  04/23/2026 01 PM PDT            6.54           1584         -              Normal
  04/23/2026 02 PM PDT            6.47           1552         -              Normal
  04/23/2026 03 PM PDT            6.41           1525         -              Normal
  04/23/2026 04 PM PDT            6.34           1494         -              Normal
  04/23/2026 05 PM PDT            6.28           1467         -              Normal
  04/23/2026 06 PM PDT            6.21           1436         -              Normal
  04/23/2026 07 PM PDT            6.16           1415         -              Normal
  04/23/2026 08 PM PDT            6.10           1389         -              Normal
  04/23/2026 09 PM PDT            6.04           1363         -              Normal
  04/23/2026 10 PM PDT            5.99           1342         -              Normal
  04/23/2026 11 PM PDT            5.93           1317         -              Normal
  04/24/2026 12 AM PDT            5.88           1296         -              Normal
  04/24/2026 01 AM PDT            5.83           1275         -              Normal
  04/24/2026 02 AM PDT            5.78           1255         -              Normal
  04/24/2026 03 AM PDT            5.73           1234         -              Normal
  04/24/2026 04 AM PDT            5.69           1218         -              Normal
  04/24/2026 05 AM PDT            5.64           1198         -              Normal
  04/24/2026 06 AM PDT            5.59           1178         -              Normal
  04/24/2026 07 AM PDT            5.55           1162         -              Normal
  04/24/2026 08 AM PDT            5.50           1143         -              Normal
  04/24/2026 09 AM PDT            5.46           1127         -              Normal
  04/24/2026 10 AM PDT            5.42           1112         -              Normal
  04/24/2026 11 AM PDT            5.38           1096         -              Normal
  04/24/2026 12 PM PDT            5.34           1081         -              Normal
  04/24/2026 01 PM PDT            5.30           1066         -              Normal
  04/24/2026 02 PM PDT            5.26           1051         -              Normal
  04/24/2026 03 PM PDT            5.22           1036         -              Normal
  04/24/2026 04 PM PDT            5.18           1021         -              Normal
  04/24/2026 05 PM PDT            5.15           1010         -              Normal
  04/24/2026 06 PM PDT            5.11            995         -              Normal
  04/24/2026 07 PM PDT            5.07            980         -              Normal
  04/24/2026 08 PM PDT            5.04            969         -              Normal
  04/24/2026 09 PM PDT            5.01            959         -              Normal
  04/24/2026 10 PM PDT            4.97            944         -              Normal
  04/24/2026 11 PM PDT            4.94            933         -              Normal
  04/25/2026 12 AM PDT            4.91            923         -              Normal
  04/25/2026 01 AM PDT            4.88            912         -              Normal
  04/25/2026 02 AM PDT            4.86            905         -              Normal
  04/25/2026 03 AM PDT            4.83            895         -              Normal
  04/25/2026 04 AM PDT            4.80            884         -              Normal
  04/25/2026 05 AM PDT            4.78            877         -              Normal
  04/25/2026 06 AM PDT            4.75            867         -              Normal
  04/25/2026 07 AM PDT            4.73            860         -              Normal
  04/25/2026 08 AM PDT            4.70            850         -              Normal
  04/25/2026 09 AM PDT            4.68            843         -              Normal
  04/25/2026 10 AM PDT            4.66            836         -              Normal
  04/25/2026 11 AM PDT            4.63            826         -              Normal
  04/25/2026 12 PM PDT            4.61            819         -              Normal
  04/25/2026 01 PM PDT            4.59            813         -              Normal
  04/25/2026 02 PM PDT            4.57            806         -              Normal
  04/25/2026 03 PM PDT            4.55            800         -              Normal
  04/25/2026 04 PM PDT            4.53            794         -              Normal
  04/25/2026 05 PM PDT            4.51            788         -              Normal
  04/25/2026 06 PM PDT            4.48            779         -              Normal
  04/25/2026 07 PM PDT            4.46            773         -              Normal
  04/25/2026 08 PM PDT            4.44            767         -              Normal
  04/25/2026 09 PM PDT            4.42            761         -              Normal
  04/25/2026 10 PM PDT            4.41            758         -              Normal
  04/25/2026 11 PM PDT            4.39            752         -              Normal
  04/26/2026 12 AM PDT            4.37            747         -              Normal
  04/26/2026 01 AM PDT            4.36            744         -              Normal
  04/26/2026 02 AM PDT            4.34            738         -              Normal
  04/26/2026 03 AM PDT            4.32            732         -              Normal
  04/26/2026 04 AM PDT            4.31            729         -              Normal
  04/26/2026 05 AM PDT            4.29            723         -              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.