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 11 2026 at 8:32 AM PDTNext Issuance: Apr 12 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:  04/11/2026 at 08:34 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/11/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       4.80 Feet
# Maximum Observed Flow:                        884 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/12/2026 at 10:00 PM PDT
# Maximum Forecast Stage:                       9.18 Feet
# Maximum Forecast Flow:                        3000 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/06/2026 08 AM PDT            3.47            509                        Normal
  04/06/2026 09 AM PDT            3.48            511         +              Normal
  04/06/2026 10 AM PDT            3.47            509         -              Normal
  04/06/2026 11 AM PDT            3.47            509         0              Normal
  04/06/2026 12 PM PDT            3.47            509         0              Normal
  04/06/2026 01 PM PDT            3.47            509         0              Normal
  04/06/2026 02 PM PDT            3.47            509         0              Normal
  04/06/2026 03 PM PDT            3.47            509         0              Normal
  04/06/2026 04 PM PDT            3.46            507         -              Normal
  04/06/2026 05 PM PDT            3.47            509         +              Normal
  04/06/2026 06 PM PDT            3.46            507         -              Normal
  04/06/2026 07 PM PDT            3.46            507         0              Normal
  04/06/2026 08 PM PDT            3.45            504         -              Normal
  04/06/2026 09 PM PDT            3.46            507         +              Normal
  04/06/2026 10 PM PDT            3.44            502         -              Normal
  04/06/2026 11 PM PDT            3.45            504         +              Normal
  04/07/2026 12 AM PDT            3.45            504         0              Normal
  04/07/2026 01 AM PDT            3.45            504         0              Normal
  04/07/2026 02 AM PDT            3.44            502         -              Normal
  04/07/2026 03 AM PDT            3.44            502         0              Normal
  04/07/2026 04 AM PDT            3.44            502         0              Normal
  04/07/2026 05 AM PDT            3.44            502         0              Normal
  04/07/2026 06 AM PDT            3.44            502         0              Normal
  04/07/2026 07 AM PDT            3.43            500         -              Normal
  04/07/2026 08 AM PDT            3.44            502         +              Normal
  04/07/2026 09 AM PDT            3.44            502         0              Normal
  04/07/2026 10 AM PDT            3.44            502         0              Normal
  04/07/2026 11 AM PDT            3.43            500         -              Normal
  04/07/2026 12 PM PDT            3.43            500         0              Normal
  04/07/2026 01 PM PDT            3.43            500         0              Normal
  04/07/2026 02 PM PDT            3.42            497         -              Normal
  04/07/2026 03 PM PDT            3.43            500         +              Normal
  04/07/2026 04 PM PDT            3.42            497         -              Normal
  04/07/2026 05 PM PDT            3.42            497         0              Normal
  04/07/2026 06 PM PDT            3.41            495         -              Normal
  04/07/2026 07 PM PDT            3.41            495         0              Normal
  04/07/2026 08 PM PDT            3.41            495         0              Normal
  04/07/2026 09 PM PDT            3.41            495         0              Normal
  04/07/2026 10 PM PDT            3.41            495         0              Normal
  04/07/2026 11 PM PDT            3.41            495         0              Normal
  04/08/2026 12 AM PDT            3.40            493         -              Normal
  04/08/2026 01 AM PDT            3.40            493         0              Normal
  04/08/2026 02 AM PDT            3.40            493         0              Normal
  04/08/2026 03 AM PDT            3.39            491         -              Normal
  04/08/2026 04 AM PDT            3.39            491         0              Normal
  04/08/2026 05 AM PDT            3.39            491         0              Normal
  04/08/2026 06 AM PDT            3.39            491         0              Normal
  04/08/2026 07 AM PDT            3.38            488         -              Normal
  04/08/2026 08 AM PDT            3.39            491         +              Normal
  04/08/2026 09 AM PDT            3.38            488         -              Normal
  04/08/2026 10 AM PDT            3.39            491         +              Normal
  04/08/2026 11 AM PDT            3.39            491         0              Normal
  04/08/2026 12 PM PDT            3.38            488         -              Normal
  04/08/2026 01 PM PDT            3.38            488         0              Normal
  04/08/2026 02 PM PDT            3.38            488         0              Normal
  04/08/2026 03 PM PDT            3.38            488         0              Normal
  04/08/2026 04 PM PDT            3.38            488         0              Normal
  04/08/2026 05 PM PDT            3.38            488         0              Normal
  04/08/2026 06 PM PDT            3.38            488         0              Normal
  04/08/2026 07 PM PDT            3.38            488         0              Normal
  04/08/2026 08 PM PDT            3.37            486         -              Normal
  04/08/2026 09 PM PDT            3.36            484         -              Normal
  04/08/2026 10 PM PDT            3.36            484         0              Normal
  04/08/2026 11 PM PDT            3.36            484         0              Normal
  04/09/2026 12 AM PDT            3.36            484         0              Normal
  04/09/2026 01 AM PDT            3.36            484         0              Normal
  04/09/2026 02 AM PDT            3.35            482         -              Normal
  04/09/2026 03 AM PDT            3.35            482         0              Normal
  04/09/2026 04 AM PDT            3.35            482         0              Normal
  04/09/2026 05 AM PDT            3.35            482         0              Normal
  04/09/2026 06 AM PDT            3.34            479         -              Normal
  04/09/2026 07 AM PDT            3.34            479         0              Normal
  04/09/2026 08 AM PDT            3.35            482         +              Normal
  04/09/2026 09 AM PDT            3.34            479         -              Normal
  04/09/2026 10 AM PDT            3.34            479         0              Normal
  04/09/2026 11 AM PDT            3.33            477         -              Normal
  04/09/2026 12 PM PDT            3.33            477         0              Normal
  04/09/2026 01 PM PDT            3.33            477         0              Normal
  04/09/2026 02 PM PDT            3.33            477         0              Normal
  04/09/2026 03 PM PDT            3.32            475         -              Normal
  04/09/2026 04 PM PDT            3.32            475         0              Normal
  04/09/2026 05 PM PDT            3.33            477         +              Normal
  04/09/2026 06 PM PDT            3.33            477         0              Normal
  04/09/2026 07 PM PDT            3.32            475         -              Normal
  04/09/2026 08 PM PDT            3.32            475         0              Normal
  04/09/2026 09 PM PDT            3.32            475         0              Normal
  04/09/2026 10 PM PDT            3.31            473         -              Normal
  04/09/2026 11 PM PDT            3.32            475         +              Normal
  04/10/2026 12 AM PDT            3.31            473         -              Normal
  04/10/2026 01 AM PDT            3.31            473         0              Normal
  04/10/2026 02 AM PDT            3.31            473         0              Normal
  04/10/2026 03 AM PDT            3.31            473         0              Normal
  04/10/2026 04 AM PDT            3.31            473         0              Normal
  04/10/2026 05 AM PDT            3.32            475         +              Normal
  04/10/2026 06 AM PDT            3.34            479         +              Normal
  04/10/2026 07 AM PDT            3.37            486         +              Normal
  04/10/2026 08 AM PDT            3.39            491         +              Normal
  04/10/2026 09 AM PDT            3.39            491         0              Normal
  04/10/2026 10 AM PDT            3.41            495         +              Normal
  04/10/2026 11 AM PDT            3.45            504         +              Normal
  04/10/2026 12 PM PDT            3.51            518         +              Normal
  04/10/2026 01 PM PDT            3.58            535         +              Normal
  04/10/2026 02 PM PDT            3.66            554         +              Normal
  04/10/2026 03 PM PDT            3.81            592         +              Normal
  04/10/2026 04 PM PDT            3.91            617         +              Normal
  04/10/2026 05 PM PDT            3.96            631         +              Normal
  04/10/2026 06 PM PDT            4.02            647         +              Normal
  04/10/2026 07 PM PDT            4.11            672         +              Normal
  04/10/2026 08 PM PDT            4.17            689         +              Normal
  04/10/2026 09 PM PDT            4.22            703         +              Normal
  04/10/2026 10 PM PDT            4.21            700         -              Normal
  04/10/2026 11 PM PDT            4.19            695         -              Normal
  04/11/2026 12 AM PDT            4.17            689         -              Normal
  04/11/2026 01 AM PDT            4.16            686         -              Normal
  04/11/2026 02 AM PDT            4.14            680         -              Normal
  04/11/2026 03 AM PDT            4.16            686         +              Normal
  04/11/2026 04 AM PDT            4.25            712         +              Normal
  04/11/2026 05 AM PDT            4.43            764         +              Normal
  04/11/2026 06 AM PDT            4.64            830         +              Normal
  04/11/2026 07 AM PDT            4.77            874         +              Normal
  04/11/2026 08 AM PDT            4.80            884         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/11/2026 09 AM PDT            4.89            916                        Normal
  04/11/2026 10 AM PDT            5.00            955         +              Normal
  04/11/2026 11 AM PDT            5.07            980         +              Normal
  04/11/2026 12 PM PDT            5.10            991         +              Normal
  04/11/2026 01 PM PDT            5.11            995         +              Normal
  04/11/2026 02 PM PDT            5.10            991         -              Normal
  04/11/2026 03 PM PDT            5.08            984         -              Normal
  04/11/2026 04 PM PDT            5.05            973         -              Normal
  04/11/2026 05 PM PDT            5.02            962         -              Normal
  04/11/2026 06 PM PDT            5.00            955         -              Normal
  04/11/2026 07 PM PDT            4.97            944         -              Normal
  04/11/2026 08 PM PDT            4.95            937         -              Normal
  04/11/2026 09 PM PDT            4.93            930         -              Normal
  04/11/2026 10 PM PDT            4.92            926         -              Normal
  04/11/2026 11 PM PDT            4.93            930         +              Normal
  04/12/2026 12 AM PDT            4.95            937         +              Normal
  04/12/2026 01 AM PDT            4.99            951         +              Normal
  04/12/2026 02 AM PDT            5.06            977         +              Normal
  04/12/2026 03 AM PDT            5.16           1013         +              Normal
  04/12/2026 04 AM PDT            5.28           1058         +              Normal
  04/12/2026 05 AM PDT            5.43           1116         +              Normal
  04/12/2026 06 AM PDT            5.61           1186         +              Normal
  04/12/2026 07 AM PDT            5.83           1275         +              Normal
  04/12/2026 08 AM PDT            6.13           1402         +              Normal
  04/12/2026 09 AM PDT            6.50           1565         +              Normal
  04/12/2026 10 AM PDT            6.90           1752         +              Normal
  04/12/2026 11 AM PDT            7.27           1933         +              Normal
  04/12/2026 12 PM PDT            7.61           2107         +              Normal
  04/12/2026 01 PM PDT            7.92           2272         +              Normal
  04/12/2026 02 PM PDT            8.20           2425         +              Normal
  04/12/2026 03 PM PDT            8.45           2566         +              Normal
  04/12/2026 04 PM PDT            8.66           2688         +              Normal
  04/12/2026 05 PM PDT            8.84           2794         +              Normal
  04/12/2026 06 PM PDT            8.98           2878         +              Normal
  04/12/2026 07 PM PDT            9.08           2939         +              Normal
  04/12/2026 08 PM PDT            9.14           2975         +              Normal
  04/12/2026 09 PM PDT            9.17           2994         +              Normal
  04/12/2026 10 PM PDT            9.18           3000         +              Normal
  04/12/2026 11 PM PDT            9.16           2988         -              Normal
  04/13/2026 12 AM PDT            9.12           2963         -              Normal
  04/13/2026 01 AM PDT            9.06           2927         -              Normal
  04/13/2026 02 AM PDT            8.97           2872         -              Normal
  04/13/2026 03 AM PDT            8.88           2818         -              Normal
  04/13/2026 04 AM PDT            8.77           2753         -              Normal
  04/13/2026 05 AM PDT            8.65           2682         -              Normal
  04/13/2026 06 AM PDT            8.53           2612         -              Normal
  04/13/2026 07 AM PDT            8.40           2538         -              Normal
  04/13/2026 08 AM PDT            8.27           2464         -              Normal
  04/13/2026 09 AM PDT            8.14           2392         -              Normal
  04/13/2026 10 AM PDT            8.00           2315         -              Normal
  04/13/2026 11 AM PDT            7.87           2245         -              Normal
  04/13/2026 12 PM PDT            7.73           2170         -              Normal
  04/13/2026 01 PM PDT            7.60           2102         -              Normal
  04/13/2026 02 PM PDT            7.47           2034         -              Normal
  04/13/2026 03 PM PDT            7.34           1968         -              Normal
  04/13/2026 04 PM PDT            7.21           1903         -              Normal
  04/13/2026 05 PM PDT            7.08           1839         -              Normal
  04/13/2026 06 PM PDT            6.95           1776         -              Normal
  04/13/2026 07 PM PDT            6.83           1719         -              Normal
  04/13/2026 08 PM PDT            6.70           1657         -              Normal
  04/13/2026 09 PM PDT            6.58           1602         -              Normal
  04/13/2026 10 PM PDT            6.47           1552         -              Normal
  04/13/2026 11 PM PDT            6.36           1503         -              Normal
  04/14/2026 12 AM PDT            6.26           1458         -              Normal
  04/14/2026 01 AM PDT            6.16           1415         -              Normal
  04/14/2026 02 AM PDT            6.07           1376         -              Normal
  04/14/2026 03 AM PDT            5.98           1338         -              Normal
  04/14/2026 04 AM PDT            5.89           1300         -              Normal
  04/14/2026 05 AM PDT            5.81           1267         -              Normal
  04/14/2026 06 AM PDT            5.74           1239         -              Normal
  04/14/2026 07 AM PDT            5.67           1210         -              Normal
  04/14/2026 08 AM PDT            5.61           1186         -              Normal
  04/14/2026 09 AM PDT            5.55           1162         -              Normal
  04/14/2026 10 AM PDT            5.49           1139         -              Normal
  04/14/2026 11 AM PDT            5.44           1119         -              Normal
  04/14/2026 12 PM PDT            5.40           1104         -              Normal
  04/14/2026 01 PM PDT            5.36           1089         -              Normal
  04/14/2026 02 PM PDT            5.32           1073         -              Normal
  04/14/2026 03 PM PDT            5.28           1058         -              Normal
  04/14/2026 04 PM PDT            5.25           1047         -              Normal
  04/14/2026 05 PM PDT            5.22           1036         -              Normal
  04/14/2026 06 PM PDT            5.19           1024         -              Normal
  04/14/2026 07 PM PDT            5.16           1013         -              Normal
  04/14/2026 08 PM PDT            5.14           1006         -              Normal
  04/14/2026 09 PM PDT            5.11            995         -              Normal
  04/14/2026 10 PM PDT            5.09            988         -              Normal
  04/14/2026 11 PM PDT            5.06            977         -              Normal
  04/15/2026 12 AM PDT            5.04            969         -              Normal
  04/15/2026 01 AM PDT            5.02            962         -              Normal
  04/15/2026 02 AM PDT            4.99            951         -              Normal
  04/15/2026 03 AM PDT            4.97            944         -              Normal
  04/15/2026 04 AM PDT            4.95            937         -              Normal
  04/15/2026 05 AM PDT            4.93            930         -              Normal
  04/15/2026 06 AM PDT            4.91            923         -              Normal
  04/15/2026 07 AM PDT            4.88            912         -              Normal
  04/15/2026 08 AM PDT            4.86            905         -              Normal
  04/15/2026 09 AM PDT            4.84            898         -              Normal
  04/15/2026 10 AM PDT            4.82            891         -              Normal
  04/15/2026 11 AM PDT            4.80            884         -              Normal
  04/15/2026 12 PM PDT            4.79            881         -              Normal
  04/15/2026 01 PM PDT            4.77            874         -              Normal
  04/15/2026 02 PM PDT            4.75            867         -              Normal
  04/15/2026 03 PM PDT            4.74            864         -              Normal
  04/15/2026 04 PM PDT            4.72            857         -              Normal
  04/15/2026 05 PM PDT            4.70            850         -              Normal
  04/15/2026 06 PM PDT            4.69            846         -              Normal
  04/15/2026 07 PM PDT            4.67            840         -              Normal
  04/15/2026 08 PM PDT            4.66            836         -              Normal
  04/15/2026 09 PM PDT            4.64            830         -              Normal
  04/15/2026 10 PM PDT            4.63            826         -              Normal
  04/15/2026 11 PM PDT            4.62            823         -              Normal
  04/16/2026 12 AM PDT            4.61            819         -              Normal
  04/16/2026 01 AM PDT            4.59            813         -              Normal
  04/16/2026 02 AM PDT            4.58            809         -              Normal
  04/16/2026 03 AM PDT            4.57            806         -              Normal
  04/16/2026 04 AM PDT            4.56            803         -              Normal
  04/16/2026 05 AM PDT            4.55            800         -              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.