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: Apr 16 2026 at 7:19 AM PDTNext Issuance: Apr 17 2026 at 9:00 AM PDT
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:  04/16/2026 at 07:21 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/12/2026 at 11:00 AM PDT
# Maximum Observed Stage:                       7.09 Feet
# Maximum Observed Flow:                        346 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/21/2026 at 05:00 AM PDT
# Maximum Forecast Stage:                       7.11 Feet
# Maximum Forecast Flow:                        351 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/11/2026 07 AM PDT            5.65             87                Not Applicable
  04/11/2026 08 AM PDT            5.70             94         +      Not Applicable
  04/11/2026 09 AM PDT            5.74             98         +      Not Applicable
  04/11/2026 10 AM PDT            5.77            102         +      Not Applicable
  04/11/2026 11 AM PDT            5.81            107         +      Not Applicable
  04/11/2026 12 PM PDT            5.84            110         +      Not Applicable
  04/11/2026 01 PM PDT            5.86            113         +      Not Applicable
  04/11/2026 02 PM PDT            5.88            115         +      Not Applicable
  04/11/2026 03 PM PDT            5.93            122         +      Not Applicable
  04/11/2026 04 PM PDT            6.01            133         +      Not Applicable
  04/11/2026 05 PM PDT            6.04            137         +      Not Applicable
  04/11/2026 06 PM PDT            6.07            141         +      Not Applicable
  04/11/2026 07 PM PDT            6.10            146         +      Not Applicable
  04/11/2026 08 PM PDT            6.12            149         +      Not Applicable
  04/11/2026 09 PM PDT            6.16            155         +      Not Applicable
  04/11/2026 10 PM PDT            6.18            158         +      Not Applicable
  04/11/2026 11 PM PDT            6.21            163         +      Not Applicable
  04/12/2026 12 AM PDT            6.26            171         +      Not Applicable
  04/12/2026 01 AM PDT            6.30            178         +      Not Applicable
  04/12/2026 02 AM PDT            6.33            183         +      Not Applicable
  04/12/2026 03 AM PDT            6.38            192         +      Not Applicable
  04/12/2026 04 AM PDT            6.53            219         +      Not Applicable
  04/12/2026 05 AM PDT            6.77            269         +      Not Applicable
  04/12/2026 06 AM PDT            6.89            297         +      Not Applicable
  04/12/2026 07 AM PDT            6.96            313         +      Not Applicable
  04/12/2026 08 AM PDT            7.01            326         +      Not Applicable
  04/12/2026 09 AM PDT            7.05            336         +      Not Applicable
  04/12/2026 10 AM PDT            7.09            346         +      Not Applicable
  04/12/2026 11 AM PDT            7.09            346         0      Not Applicable
  04/12/2026 12 PM PDT            7.07            341         -      Not Applicable
  04/12/2026 01 PM PDT            7.05            336         -      Not Applicable
  04/12/2026 02 PM PDT            7.02            328         -      Not Applicable
  04/12/2026 03 PM PDT            7.00            323         -      Not Applicable
  04/12/2026 04 PM PDT            6.98            318         -      Not Applicable
  04/12/2026 05 PM PDT            6.95            311         -      Not Applicable
  04/12/2026 06 PM PDT            6.93            306         -      Not Applicable
  04/12/2026 07 PM PDT            6.92            304         -      Not Applicable
  04/12/2026 08 PM PDT            6.90            299         -      Not Applicable
  04/12/2026 09 PM PDT            6.90            299         0      Not Applicable
  04/12/2026 10 PM PDT            6.89            297         -      Not Applicable
  04/12/2026 11 PM PDT            6.90            299         +      Not Applicable
  04/13/2026 12 AM PDT            6.90            299         0      Not Applicable
  04/13/2026 01 AM PDT            6.89            297         -      Not Applicable
  04/13/2026 02 AM PDT            6.85            287         -      Not Applicable
  04/13/2026 03 AM PDT            6.82            280         -      Not Applicable
  04/13/2026 04 AM PDT            6.78            271         -      Not Applicable
  04/13/2026 05 AM PDT            6.74            263         -      Not Applicable
  04/13/2026 06 AM PDT            6.70            254         -      Not Applicable
  04/13/2026 07 AM PDT            6.66            246         -      Not Applicable
  04/13/2026 08 AM PDT            6.62            237         -      Not Applicable
  04/13/2026 09 AM PDT            6.58            229         -      Not Applicable
  04/13/2026 10 AM PDT            6.56            225         -      Not Applicable
  04/13/2026 11 AM PDT            6.52            217         -      Not Applicable
  04/13/2026 12 PM PDT            6.49            212         -      Not Applicable
  04/13/2026 01 PM PDT            6.47            208         -      Not Applicable
  04/13/2026 02 PM PDT            6.44            202         -      Not Applicable
  04/13/2026 03 PM PDT            6.41            197         -      Not Applicable
  04/13/2026 04 PM PDT            6.39            193         -      Not Applicable
  04/13/2026 05 PM PDT            6.36            188         -      Not Applicable
  04/13/2026 06 PM PDT            6.34            185         -      Not Applicable
  04/13/2026 07 PM PDT            6.31            179         -      Not Applicable
  04/13/2026 08 PM PDT            6.30            178         -      Not Applicable
  04/13/2026 09 PM PDT            6.28            174         -      Not Applicable
  04/13/2026 10 PM PDT            6.26            171         -      Not Applicable
  04/13/2026 11 PM PDT            6.24            168         -      Not Applicable
  04/14/2026 12 AM PDT            6.22            164         -      Not Applicable
  04/14/2026 01 AM PDT            6.20            161         -      Not Applicable
  04/14/2026 02 AM PDT            6.18            158         -      Not Applicable
  04/14/2026 03 AM PDT            6.17            157         -      Not Applicable
  04/14/2026 04 AM PDT            6.15            153         -      Not Applicable
  04/14/2026 05 AM PDT            6.14            152         -      Not Applicable
  04/14/2026 06 AM PDT            6.12            149         -      Not Applicable
  04/14/2026 07 AM PDT            6.10            146         -      Not Applicable
  04/14/2026 08 AM PDT            6.10            146         0      Not Applicable
  04/14/2026 09 AM PDT            6.07            141         -      Not Applicable
  04/14/2026 10 AM PDT            6.07            141         0      Not Applicable
  04/14/2026 11 AM PDT            6.05            139         -      Not Applicable
  04/14/2026 12 PM PDT            6.04            137         -      Not Applicable
  04/14/2026 01 PM PDT            6.03            136         -      Not Applicable
  04/14/2026 02 PM PDT            6.02            134         -      Not Applicable
  04/14/2026 03 PM PDT            6.01            133         -      Not Applicable
  04/14/2026 04 PM PDT            5.99            130         -      Not Applicable
  04/14/2026 05 PM PDT            5.98            129         -      Not Applicable
  04/14/2026 06 PM PDT            5.97            127         -      Not Applicable
  04/14/2026 07 PM PDT            5.96            126         -      Not Applicable
  04/14/2026 08 PM PDT            5.95            125         -      Not Applicable
  04/14/2026 09 PM PDT            5.95            125         0      Not Applicable
  04/14/2026 10 PM PDT            5.93            122         -      Not Applicable
  04/14/2026 11 PM PDT            5.93            122         0      Not Applicable
  04/15/2026 12 AM PDT            5.92            121         -      Not Applicable
  04/15/2026 01 AM PDT            5.91            119         -      Not Applicable
  04/15/2026 02 AM PDT            5.90            118         -      Not Applicable
  04/15/2026 03 AM PDT            5.89            117         -      Not Applicable
  04/15/2026 04 AM PDT            5.88            115         -      Not Applicable
  04/15/2026 05 AM PDT            5.88            115         0      Not Applicable
  04/15/2026 06 AM PDT            5.87            114         -      Not Applicable
  04/15/2026 07 AM PDT            5.87            114         0      Not Applicable
  04/15/2026 08 AM PDT            5.86            113         -      Not Applicable
  04/15/2026 09 AM PDT            5.85            112         -      Not Applicable
  04/15/2026 10 AM PDT            5.84            110         -      Not Applicable
  04/15/2026 11 AM PDT            5.84            110         0      Not Applicable
  04/15/2026 12 PM PDT            5.83            109         -      Not Applicable
  04/15/2026 01 PM PDT            5.82            108         -      Not Applicable
  04/15/2026 02 PM PDT            5.81            107         -      Not Applicable
  04/15/2026 03 PM PDT            5.80            106         -      Not Applicable
  04/15/2026 04 PM PDT            5.80            106         0      Not Applicable
  04/15/2026 05 PM PDT            5.80            106         0      Not Applicable
  04/15/2026 06 PM PDT            5.79            104         -      Not Applicable
  04/15/2026 07 PM PDT            5.78            103         -      Not Applicable
  04/15/2026 08 PM PDT            5.78            103         0      Not Applicable
  04/15/2026 09 PM PDT            5.78            103         0      Not Applicable
  04/15/2026 10 PM PDT            5.77            102         -      Not Applicable
  04/15/2026 11 PM PDT            5.76            101         -      Not Applicable
  04/16/2026 12 AM PDT            5.76            101         0      Not Applicable
  04/16/2026 01 AM PDT            5.76            101         0      Not Applicable
  04/16/2026 02 AM PDT            5.75            100         -      Not Applicable
  04/16/2026 03 AM PDT            5.75            100         0      Not Applicable
  04/16/2026 04 AM PDT            5.75            100         0      Not Applicable
  04/16/2026 05 AM PDT            5.74             98         -      Not Applicable
  04/16/2026 06 AM PDT            5.74             98         0      Not Applicable
  04/16/2026 07 AM PDT            5.73             97         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/16/2026 08 AM PDT            5.73             97                Not Applicable
  04/16/2026 09 AM PDT            5.73             97         0      Not Applicable
  04/16/2026 10 AM PDT            5.72             96         -      Not Applicable
  04/16/2026 11 AM PDT            5.72             96         0      Not Applicable
  04/16/2026 12 PM PDT            5.72             96         0      Not Applicable
  04/16/2026 01 PM PDT            5.71             95         -      Not Applicable
  04/16/2026 02 PM PDT            5.71             95         0      Not Applicable
  04/16/2026 03 PM PDT            5.71             95         0      Not Applicable
  04/16/2026 04 PM PDT            5.70             94         -      Not Applicable
  04/16/2026 05 PM PDT            5.70             94         0      Not Applicable
  04/16/2026 06 PM PDT            5.70             94         0      Not Applicable
  04/16/2026 07 PM PDT            5.69             92         -      Not Applicable
  04/16/2026 08 PM PDT            5.69             92         0      Not Applicable
  04/16/2026 09 PM PDT            5.69             92         0      Not Applicable
  04/16/2026 10 PM PDT            5.68             91         -      Not Applicable
  04/16/2026 11 PM PDT            5.68             91         0      Not Applicable
  04/17/2026 12 AM PDT            5.68             91         0      Not Applicable
  04/17/2026 01 AM PDT            5.68             91         0      Not Applicable
  04/17/2026 02 AM PDT            5.67             90         -      Not Applicable
  04/17/2026 03 AM PDT            5.67             90         0      Not Applicable
  04/17/2026 04 AM PDT            5.67             90         0      Not Applicable
  04/17/2026 05 AM PDT            5.67             90         0      Not Applicable
  04/17/2026 06 AM PDT            5.66             88         -      Not Applicable
  04/17/2026 07 AM PDT            5.66             88         0      Not Applicable
  04/17/2026 08 AM PDT            5.66             88         0      Not Applicable
  04/17/2026 09 AM PDT            5.65             87         -      Not Applicable
  04/17/2026 10 AM PDT            5.65             87         0      Not Applicable
  04/17/2026 11 AM PDT            5.65             87         0      Not Applicable
  04/17/2026 12 PM PDT            5.64             86         -      Not Applicable
  04/17/2026 01 PM PDT            5.64             86         0      Not Applicable
  04/17/2026 02 PM PDT            5.64             86         0      Not Applicable
  04/17/2026 03 PM PDT            5.63             84         -      Not Applicable
  04/17/2026 04 PM PDT            5.63             84         0      Not Applicable
  04/17/2026 05 PM PDT            5.63             84         0      Not Applicable
  04/17/2026 06 PM PDT            5.63             84         0      Not Applicable
  04/17/2026 07 PM PDT            5.62             83         -      Not Applicable
  04/17/2026 08 PM PDT            5.62             83         0      Not Applicable
  04/17/2026 09 PM PDT            5.62             83         0      Not Applicable
  04/17/2026 10 PM PDT            5.62             83         0      Not Applicable
  04/17/2026 11 PM PDT            5.61             82         -      Not Applicable
  04/18/2026 12 AM PDT            5.61             82         0      Not Applicable
  04/18/2026 01 AM PDT            5.61             82         0      Not Applicable
  04/18/2026 02 AM PDT            5.60             81         -      Not Applicable
  04/18/2026 03 AM PDT            5.60             81         0      Not Applicable
  04/18/2026 04 AM PDT            5.60             81         0      Not Applicable
  04/18/2026 05 AM PDT            5.59             79         -      Not Applicable
  04/18/2026 06 AM PDT            5.59             79         0      Not Applicable
  04/18/2026 07 AM PDT            5.59             79         0      Not Applicable
  04/18/2026 08 AM PDT            5.58             78         -      Not Applicable
  04/18/2026 09 AM PDT            5.58             78         0      Not Applicable
  04/18/2026 10 AM PDT            5.58             78         0      Not Applicable
  04/18/2026 11 AM PDT            5.58             78         0      Not Applicable
  04/18/2026 12 PM PDT            5.57             77         -      Not Applicable
  04/18/2026 01 PM PDT            5.57             77         0      Not Applicable
  04/18/2026 02 PM PDT            5.57             77         0      Not Applicable
  04/18/2026 03 PM PDT            5.56             76         -      Not Applicable
  04/18/2026 04 PM PDT            5.56             76         0      Not Applicable
  04/18/2026 05 PM PDT            5.56             76         0      Not Applicable
  04/18/2026 06 PM PDT            5.55             75         -      Not Applicable
  04/18/2026 07 PM PDT            5.55             75         0      Not Applicable
  04/18/2026 08 PM PDT            5.55             75         0      Not Applicable
  04/18/2026 09 PM PDT            5.54             73         -      Not Applicable
  04/18/2026 10 PM PDT            5.54             73         0      Not Applicable
  04/18/2026 11 PM PDT            5.54             73         0      Not Applicable
  04/19/2026 12 AM PDT            5.54             73         0      Not Applicable
  04/19/2026 01 AM PDT            5.53             72         -      Not Applicable
  04/19/2026 02 AM PDT            5.53             72         0      Not Applicable
  04/19/2026 03 AM PDT            5.53             72         0      Not Applicable
  04/19/2026 04 AM PDT            5.52             71         -      Not Applicable
  04/19/2026 05 AM PDT            5.52             71         0      Not Applicable
  04/19/2026 06 AM PDT            5.52             71         0      Not Applicable
  04/19/2026 07 AM PDT            5.51             70         -      Not Applicable
  04/19/2026 08 AM PDT            5.51             70         0      Not Applicable
  04/19/2026 09 AM PDT            5.51             70         0      Not Applicable
  04/19/2026 10 AM PDT            5.50             69         -      Not Applicable
  04/19/2026 11 AM PDT            5.50             69         0      Not Applicable
  04/19/2026 12 PM PDT            5.50             69         0      Not Applicable
  04/19/2026 01 PM PDT            5.49             68         -      Not Applicable
  04/19/2026 02 PM PDT            5.49             68         0      Not Applicable
  04/19/2026 03 PM PDT            5.49             68         0      Not Applicable
  04/19/2026 04 PM PDT            5.49             68         0      Not Applicable
  04/19/2026 05 PM PDT            5.48             66         -      Not Applicable
  04/19/2026 06 PM PDT            5.48             66         0      Not Applicable
  04/19/2026 07 PM PDT            5.47             65         -      Not Applicable
  04/19/2026 08 PM PDT            5.47             65         0      Not Applicable
  04/19/2026 09 PM PDT            5.47             65         0      Not Applicable
  04/19/2026 10 PM PDT            5.46             64         -      Not Applicable
  04/19/2026 11 PM PDT            5.46             64         0      Not Applicable
  04/20/2026 12 AM PDT            5.46             64         0      Not Applicable
  04/20/2026 01 AM PDT            5.46             64         0      Not Applicable
  04/20/2026 02 AM PDT            5.46             64         0      Not Applicable
  04/20/2026 03 AM PDT            5.45             63         -      Not Applicable
  04/20/2026 04 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 05 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 06 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 07 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 08 AM PDT            5.46             64         +      Not Applicable
  04/20/2026 09 AM PDT            5.46             64         0      Not Applicable
  04/20/2026 10 AM PDT            5.46             64         0      Not Applicable
  04/20/2026 11 AM PDT            5.47             65         +      Not Applicable
  04/20/2026 12 PM PDT            5.48             66         +      Not Applicable
  04/20/2026 01 PM PDT            5.49             68         +      Not Applicable
  04/20/2026 02 PM PDT            5.50             69         +      Not Applicable
  04/20/2026 03 PM PDT            5.52             71         +      Not Applicable
  04/20/2026 04 PM PDT            5.54             73         +      Not Applicable
  04/20/2026 05 PM PDT            5.58             78         +      Not Applicable
  04/20/2026 06 PM PDT            5.63             84         +      Not Applicable
  04/20/2026 07 PM PDT            5.70             94         +      Not Applicable
  04/20/2026 08 PM PDT            5.82            108         +      Not Applicable
  04/20/2026 09 PM PDT            5.95            125         +      Not Applicable
  04/20/2026 10 PM PDT            6.09            144         +      Not Applicable
  04/20/2026 11 PM PDT            6.24            168         +      Not Applicable
  04/21/2026 12 AM PDT            6.38            192         +      Not Applicable
  04/21/2026 01 AM PDT            6.53            219         +      Not Applicable
  04/21/2026 02 AM PDT            6.68            250         +      Not Applicable
  04/21/2026 03 AM PDT            6.84            285         +      Not Applicable
  04/21/2026 04 AM PDT            6.99            321         +      Not Applicable
  04/21/2026 05 AM PDT            7.11            351         +      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.