SOUTH FORK GUALALA RIVER - SEA RANCH (GSRC1)
Latitude: 38.71º NLongitude: 123.43º WElevation: 40 FeetForecast Type: Unofficial Location
Location: Sonoma County in CaliforniaBulletin Group: Russian NapaRiver Group: Russian Napa
Issuance Time: Feb 27 2026 at 7:41 AM PSTNext Issuance: Feb 27 2026 at 3:00 PM PST
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A

# Tabular Observed and Forecast Hydrograph Information
#
# Location: South Fork Gualala River - Sea Ranch (GSRC1)
#
# File Generation Time:  02/27/2026 at 07:43 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  02/25/2026 at 12:00 AM PST
# Maximum Observed Stage:                       22.33 Feet
# Maximum Observed Flow:                        10744 cfs
#
# Earliest Date & Time of Maximum Forecast:     02/27/2026 at 08:00 AM PST
# Maximum Forecast Stage:                       9.19 Feet
# Maximum Forecast Flow:                        1259 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  02/22/2026 07 AM PST            7.56            496                Not Applicable
  02/22/2026 08 AM PST            7.55            492         -      Not Applicable
  02/22/2026 09 AM PST            7.54            488         -      Not Applicable
  02/22/2026 10 AM PST            7.54            488         0      Not Applicable
  02/22/2026 11 AM PST            7.53            484         -      Not Applicable
  02/22/2026 12 PM PST            7.54            488         +      Not Applicable
  02/22/2026 01 PM PST            7.53            484         -      Not Applicable
  02/22/2026 02 PM PST            7.54            488         +      Not Applicable
  02/22/2026 03 PM PST            7.54            488         0      Not Applicable
  02/22/2026 04 PM PST            7.55            492         +      Not Applicable
  02/22/2026 05 PM PST            7.56            496         +      Not Applicable
  02/22/2026 06 PM PST            7.61            515         +      Not Applicable
  02/22/2026 07 PM PST            7.63            523         +      Not Applicable
  02/22/2026 08 PM PST            7.69            546         +      Not Applicable
  02/22/2026 09 PM PST            7.76            575         +      Not Applicable
  02/22/2026 10 PM PST            7.82            600         +      Not Applicable
  02/22/2026 11 PM PST            7.94            653         +      Not Applicable
  02/23/2026 12 AM PST            8.08            718         +      Not Applicable
  02/23/2026 01 AM PST            8.20            777         +      Not Applicable
  02/23/2026 02 AM PST            8.31            833         +      Not Applicable
  02/23/2026 03 AM PST            8.39            876         +      Not Applicable
  02/23/2026 04 AM PST            8.47            916         +      Not Applicable
  02/23/2026 05 AM PST            8.50            930         +      Not Applicable
  02/23/2026 06 AM PST            8.54            949         +      Not Applicable
  02/23/2026 07 AM PST            8.58            968         +      Not Applicable
  02/23/2026 08 AM PST            8.58            968         0      Not Applicable
  02/23/2026 09 AM PST            8.57            964         -      Not Applicable
  02/23/2026 10 AM PST            8.56            959         -      Not Applicable
  02/23/2026 11 AM PST            8.53            944         -      Not Applicable
  02/23/2026 12 PM PST            8.51            935         -      Not Applicable
  02/23/2026 01 PM PST            8.48            921         -      Not Applicable
  02/23/2026 02 PM PST            8.45            907         -      Not Applicable
  02/23/2026 03 PM PST            8.42            893         -      Not Applicable
  02/23/2026 04 PM PST            8.38            871         -      Not Applicable
  02/23/2026 05 PM PST            8.34            849         -      Not Applicable
  02/23/2026 06 PM PST            8.30            828         -      Not Applicable
  02/23/2026 07 PM PST            8.28            818         -      Not Applicable
  02/23/2026 08 PM PST            8.26            807         -      Not Applicable
  02/23/2026 09 PM PST            8.24            797         -      Not Applicable
  02/23/2026 10 PM PST            8.20            777         -      Not Applicable
  02/23/2026 11 PM PST            8.21            782         +      Not Applicable
  02/24/2026 12 AM PST            8.20            777         -      Not Applicable
  02/24/2026 01 AM PST            8.21            782         +      Not Applicable
  02/24/2026 02 AM PST            8.24            797         +      Not Applicable
  02/24/2026 03 AM PST            8.28            818         +      Not Applicable
  02/24/2026 04 AM PST            8.37            865         +      Not Applicable
  02/24/2026 05 AM PST            8.51            935         +      Not Applicable
  02/24/2026 06 AM PST            8.68           1017         +      Not Applicable
  02/24/2026 07 AM PST            8.92           1122         +      Not Applicable
  02/24/2026 08 AM PST            9.24           1283         +      Not Applicable
  02/24/2026 09 AM PST            9.58           1450         +      Not Applicable
  02/24/2026 10 AM PST           10.02           1677         +      Not Applicable
  02/24/2026 11 AM PST           10.49           1933         +      Not Applicable
  02/24/2026 12 PM PST           10.90           2168         +      Not Applicable
  02/24/2026 01 PM PST           11.33           2402         +      Not Applicable
  02/24/2026 02 PM PST           11.89           2709         +      Not Applicable
  02/24/2026 03 PM PST           12.68           3166         +      Not Applicable
  02/24/2026 04 PM PST           13.68           3784         +      Not Applicable
  02/24/2026 05 PM PST           14.86           4566         +      Not Applicable
  02/24/2026 06 PM PST           16.08           5434         +      Not Applicable
  02/24/2026 07 PM PST           17.45           6477         +      Not Applicable
  02/24/2026 08 PM PST           18.89           7649         +      Not Applicable
  02/24/2026 09 PM PST           20.26           8833         +      Not Applicable
  02/24/2026 10 PM PST           21.24           9719         +      Not Applicable
  02/24/2026 11 PM PST           21.99          10420         +      Not Applicable
  02/25/2026 12 AM PST           22.33          10744         +      Not Applicable
  02/25/2026 01 AM PST           22.14          10562         -      Not Applicable
  02/25/2026 02 AM PST           21.69          10137         -      Not Applicable
  02/25/2026 03 AM PST           20.98           9481         -      Not Applicable
  02/25/2026 04 AM PST           20.15           8735         -      Not Applicable
  02/25/2026 05 AM PST           19.35           8039         -      Not Applicable
  02/25/2026 06 AM PST           18.58           7390         -      Not Applicable
  02/25/2026 07 AM PST           17.84           6787         -      Not Applicable
  02/25/2026 08 AM PST           17.21           6290         -      Not Applicable
  02/25/2026 09 AM PST           16.61           5829         -      Not Applicable
  02/25/2026 10 AM PST           16.12           5464         -      Not Applicable
  02/25/2026 11 AM PST           15.62           5100         -      Not Applicable
  02/25/2026 12 PM PST           15.21           4809         -      Not Applicable
  02/25/2026 01 PM PST           14.86           4566         -      Not Applicable
  02/25/2026 02 PM PST           14.46           4295         -      Not Applicable
  02/25/2026 03 PM PST           14.14           4082         -      Not Applicable
  02/25/2026 04 PM PST           13.82           3874         -      Not Applicable
  02/25/2026 05 PM PST           13.57           3714         -      Not Applicable
  02/25/2026 06 PM PST           13.26           3519         -      Not Applicable
  02/25/2026 07 PM PST           13.03           3377         -      Not Applicable
  02/25/2026 08 PM PST           12.80           3238         -      Not Applicable
  02/25/2026 09 PM PST           12.59           3112         -      Not Applicable
  02/25/2026 10 PM PST           12.40           3001         -      Not Applicable
  02/25/2026 11 PM PST           12.20           2885         -      Not Applicable
  02/26/2026 12 AM PST           12.01           2776         -      Not Applicable
  02/26/2026 01 AM PST           11.89           2709         -      Not Applicable
  02/26/2026 02 AM PST           11.73           2620         -      Not Applicable
  02/26/2026 03 AM PST           11.57           2531         -      Not Applicable
  02/26/2026 04 AM PST           11.44           2461         -      Not Applicable
  02/26/2026 05 AM PST           11.29           2380         -      Not Applicable
  02/26/2026 06 AM PST           11.17           2317         -      Not Applicable
  02/26/2026 07 AM PST           11.06           2259         -      Not Applicable
  02/26/2026 08 AM PST           10.92           2180         -      Not Applicable
  02/26/2026 09 AM PST           10.84           2133         -      Not Applicable
  02/26/2026 10 AM PST           10.74           2075         -      Not Applicable
  02/26/2026 11 AM PST           10.61           2001         -      Not Applicable
  02/26/2026 12 PM PST           10.51           1945         -      Not Applicable
  02/26/2026 01 PM PST           10.46           1917         -      Not Applicable
  02/26/2026 02 PM PST           10.36           1861         -      Not Applicable
  02/26/2026 03 PM PST           10.28           1817         -      Not Applicable
  02/26/2026 04 PM PST           10.18           1763         -      Not Applicable
  02/26/2026 05 PM PST           10.11           1725         -      Not Applicable
  02/26/2026 06 PM PST           10.03           1682         -      Not Applicable
  02/26/2026 07 PM PST            9.93           1629         -      Not Applicable
  02/26/2026 08 PM PST            9.87           1598         -      Not Applicable
  02/26/2026 09 PM PST            9.78           1551         -      Not Applicable
  02/26/2026 10 PM PST            9.74           1531         -      Not Applicable
  02/26/2026 11 PM PST            9.66           1490         -      Not Applicable
  02/27/2026 12 AM PST            9.59           1455         -      Not Applicable
  02/27/2026 01 AM PST            9.56           1440         -      Not Applicable
  02/27/2026 02 AM PST            9.50           1410         -      Not Applicable
  02/27/2026 03 AM PST            9.43           1375         -      Not Applicable
  02/27/2026 04 AM PST            9.38           1351         -      Not Applicable
  02/27/2026 05 AM PST            9.32           1322         -      Not Applicable
  02/27/2026 06 AM PST            9.28           1302         -      Not Applicable
  02/27/2026 07 AM PST            9.23           1278         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  02/27/2026 08 AM PST            9.19           1259                Not Applicable
  02/27/2026 09 AM PST            9.16           1243         -      Not Applicable
  02/27/2026 10 AM PST            9.12           1222         -      Not Applicable
  02/27/2026 11 AM PST            9.09           1206         -      Not Applicable
  02/27/2026 12 PM PST            9.05           1185         -      Not Applicable
  02/27/2026 01 PM PST            9.02           1169         -      Not Applicable
  02/27/2026 02 PM PST            8.99           1153         -      Not Applicable
  02/27/2026 03 PM PST            8.95           1135         -      Not Applicable
  02/27/2026 04 PM PST            8.91           1118         -      Not Applicable
  02/27/2026 05 PM PST            8.87           1101         -      Not Applicable
  02/27/2026 06 PM PST            8.83           1085         -      Not Applicable
  02/27/2026 07 PM PST            8.79           1068         -      Not Applicable
  02/27/2026 08 PM PST            8.75           1052         -      Not Applicable
  02/27/2026 09 PM PST            8.72           1037         -      Not Applicable
  02/27/2026 10 PM PST            8.69           1022         -      Not Applicable
  02/27/2026 11 PM PST            8.65           1003         -      Not Applicable
  02/28/2026 12 AM PST            8.62            988         -      Not Applicable
  02/28/2026 01 AM PST            8.59            973         -      Not Applicable
  02/28/2026 02 AM PST            8.56            959         -      Not Applicable
  02/28/2026 03 AM PST            8.53            944         -      Not Applicable
  02/28/2026 04 AM PST            8.50            930         -      Not Applicable
  02/28/2026 05 AM PST            8.47            916         -      Not Applicable
  02/28/2026 06 AM PST            8.44            902         -      Not Applicable
  02/28/2026 07 AM PST            8.41            887         -      Not Applicable
  02/28/2026 08 AM PST            8.38            871         -      Not Applicable
  02/28/2026 09 AM PST            8.36            860         -      Not Applicable
  02/28/2026 10 AM PST            8.33            844         -      Not Applicable
  02/28/2026 11 AM PST            8.31            833         -      Not Applicable
  02/28/2026 12 PM PST            8.28            818         -      Not Applicable
  02/28/2026 01 PM PST            8.25            802         -      Not Applicable
  02/28/2026 02 PM PST            8.23            792         -      Not Applicable
  02/28/2026 03 PM PST            8.20            777         -      Not Applicable
  02/28/2026 04 PM PST            8.17            762         -      Not Applicable
  02/28/2026 05 PM PST            8.15            752         -      Not Applicable
  02/28/2026 06 PM PST            8.12            737         -      Not Applicable
  02/28/2026 07 PM PST            8.09            723         -      Not Applicable
  02/28/2026 08 PM PST            8.06            708         -      Not Applicable
  02/28/2026 09 PM PST            8.04            699         -      Not Applicable
  02/28/2026 10 PM PST            8.01            685         -      Not Applicable
  02/28/2026 11 PM PST            7.98            671         -      Not Applicable
  03/01/2026 12 AM PST            7.95            657         -      Not Applicable
  03/01/2026 01 AM PST            7.92            644         -      Not Applicable
  03/01/2026 02 AM PST            7.89            630         -      Not Applicable
  03/01/2026 03 AM PST            7.87            622         -      Not Applicable
  03/01/2026 04 AM PST            7.83            604         -      Not Applicable
  03/01/2026 05 AM PST            7.80            592         -      Not Applicable
  03/01/2026 06 AM PST            7.78            583         -      Not Applicable
  03/01/2026 07 AM PST            7.75            571         -      Not Applicable
  03/01/2026 08 AM PST            7.74            567         -      Not Applicable
  03/01/2026 09 AM PST            7.73            562         -      Not Applicable
  03/01/2026 10 AM PST            7.72            558         -      Not Applicable
  03/01/2026 11 AM PST            7.71            554         -      Not Applicable
  03/01/2026 12 PM PST            7.70            550         -      Not Applicable
  03/01/2026 01 PM PST            7.69            546         -      Not Applicable
  03/01/2026 02 PM PST            7.68            542         -      Not Applicable
  03/01/2026 03 PM PST            7.67            538         -      Not Applicable
  03/01/2026 04 PM PST            7.66            534         -      Not Applicable
  03/01/2026 05 PM PST            7.66            534         0      Not Applicable
  03/01/2026 06 PM PST            7.65            530         -      Not Applicable
  03/01/2026 07 PM PST            7.64            526         -      Not Applicable
  03/01/2026 08 PM PST            7.63            523         -      Not Applicable
  03/01/2026 09 PM PST            7.62            519         -      Not Applicable
  03/01/2026 10 PM PST            7.61            515         -      Not Applicable
  03/01/2026 11 PM PST            7.61            515         0      Not Applicable
  03/02/2026 12 AM PST            7.60            511         -      Not Applicable
  03/02/2026 01 AM PST            7.59            507         -      Not Applicable
  03/02/2026 02 AM PST            7.58            503         -      Not Applicable
  03/02/2026 03 AM PST            7.57            499         -      Not Applicable
  03/02/2026 04 AM PST            7.57            499         0      Not Applicable
  03/02/2026 05 AM PST            7.56            496         -      Not Applicable
  03/02/2026 06 AM PST            7.55            492         -      Not Applicable
  03/02/2026 07 AM PST            7.55            492         0      Not Applicable
  03/02/2026 08 AM PST            7.54            488         -      Not Applicable
  03/02/2026 09 AM PST            7.53            484         -      Not Applicable
  03/02/2026 10 AM PST            7.53            484         0      Not Applicable
  03/02/2026 11 AM PST            7.52            481         -      Not Applicable
  03/02/2026 12 PM PST            7.51            477         -      Not Applicable
  03/02/2026 01 PM PST            7.50            473         -      Not Applicable
  03/02/2026 02 PM PST            7.50            473         0      Not Applicable
  03/02/2026 03 PM PST            7.49            470         -      Not Applicable
  03/02/2026 04 PM PST            7.48            466         -      Not Applicable
  03/02/2026 05 PM PST            7.47            463         -      Not Applicable
  03/02/2026 06 PM PST            7.47            463         0      Not Applicable
  03/02/2026 07 PM PST            7.46            459         -      Not Applicable
  03/02/2026 08 PM PST            7.45            455         -      Not Applicable
  03/02/2026 09 PM PST            7.45            455         0      Not Applicable
  03/02/2026 10 PM PST            7.44            452         -      Not Applicable
  03/02/2026 11 PM PST            7.43            448         -      Not Applicable
  03/03/2026 12 AM PST            7.42            445         -      Not Applicable
  03/03/2026 01 AM PST            7.42            445         0      Not Applicable
  03/03/2026 02 AM PST            7.41            441         -      Not Applicable
  03/03/2026 03 AM PST            7.40            438         -      Not Applicable
  03/03/2026 04 AM PST            7.39            434         -      Not Applicable
  03/03/2026 05 AM PST            7.39            434         0      Not Applicable
  03/03/2026 06 AM PST            7.38            431         -      Not Applicable
  03/03/2026 07 AM PST            7.37            427         -      Not Applicable
  03/03/2026 08 AM PST            7.37            427         0      Not Applicable
  03/03/2026 09 AM PST            7.36            424         -      Not Applicable
  03/03/2026 10 AM PST            7.35            421         -      Not Applicable
  03/03/2026 11 AM PST            7.35            421         0      Not Applicable
  03/03/2026 12 PM PST            7.34            417         -      Not Applicable
  03/03/2026 01 PM PST            7.33            414         -      Not Applicable
  03/03/2026 02 PM PST            7.33            414         0      Not Applicable
  03/03/2026 03 PM PST            7.32            410         -      Not Applicable
  03/03/2026 04 PM PST            7.31            407         -      Not Applicable
  03/03/2026 05 PM PST            7.31            407         0      Not Applicable
  03/03/2026 06 PM PST            7.30            404         -      Not Applicable
  03/03/2026 07 PM PST            7.29            401         -      Not Applicable
  03/03/2026 08 PM PST            7.29            401         0      Not Applicable
  03/03/2026 09 PM PST            7.28            397         -      Not Applicable
  03/03/2026 10 PM PST            7.27            394         -      Not Applicable
  03/03/2026 11 PM PST            7.27            394         0      Not Applicable
  03/04/2026 12 AM PST            7.26            391         -      Not Applicable
  03/04/2026 01 AM PST            7.25            388         -      Not Applicable
  03/04/2026 02 AM PST            7.25            388         0      Not Applicable
  03/04/2026 03 AM PST            7.24            384         -      Not Applicable
  03/04/2026 04 AM PST            7.23            381         -      Not Applicable
#
# 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.