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

 | 

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 22 2026 at 7:28 AM PDTNext Issuance: Apr 23 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:  04/22/2026 at 07:29 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/21/2026 at 10:00 PM PDT
# Maximum Observed Stage:                       6.71 Feet
# Maximum Observed Flow:                        256 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/22/2026 at 02:00 PM PDT
# Maximum Forecast Stage:                       7.22 Feet
# Maximum Forecast Flow:                        381 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/17/2026 07 AM PDT            5.62             83                Not Applicable
  04/17/2026 08 AM PDT            5.62             83         0      Not Applicable
  04/17/2026 09 AM PDT            5.62             83         0      Not Applicable
  04/17/2026 10 AM PDT            5.61             82         -      Not Applicable
  04/17/2026 11 AM PDT            5.60             81         -      Not Applicable
  04/17/2026 12 PM PDT            5.61             82         +      Not Applicable
  04/17/2026 01 PM PDT            5.60             81         -      Not Applicable
  04/17/2026 02 PM PDT            5.59             79         -      Not Applicable
  04/17/2026 03 PM PDT            5.58             78         -      Not Applicable
  04/17/2026 04 PM PDT            5.58             78         0      Not Applicable
  04/17/2026 05 PM PDT            5.57             77         -      Not Applicable
  04/17/2026 06 PM PDT            5.57             77         0      Not Applicable
  04/17/2026 07 PM PDT            5.57             77         0      Not Applicable
  04/17/2026 08 PM PDT            5.58             78         +      Not Applicable
  04/17/2026 09 PM PDT            5.57             77         -      Not Applicable
  04/17/2026 10 PM PDT            5.57             77         0      Not Applicable
  04/17/2026 11 PM PDT            5.57             77         0      Not Applicable
  04/18/2026 12 AM PDT            5.56             76         -      Not Applicable
  04/18/2026 01 AM PDT            5.56             76         0      Not Applicable
  04/18/2026 02 AM PDT            5.56             76         0      Not Applicable
  04/18/2026 03 AM PDT            5.56             76         0      Not Applicable
  04/18/2026 04 AM PDT            5.56             76         0      Not Applicable
  04/18/2026 05 AM PDT            5.55             75         -      Not Applicable
  04/18/2026 06 AM PDT            5.55             75         0      Not Applicable
  04/18/2026 07 AM PDT            5.54             73         -      Not Applicable
  04/18/2026 08 AM PDT            5.54             73         0      Not Applicable
  04/18/2026 09 AM PDT            5.53             72         -      Not Applicable
  04/18/2026 10 AM PDT            5.52             71         -      Not Applicable
  04/18/2026 11 AM PDT            5.52             71         0      Not Applicable
  04/18/2026 12 PM PDT            5.52             71         0      Not Applicable
  04/18/2026 01 PM PDT            5.52             71         0      Not Applicable
  04/18/2026 02 PM PDT            5.52             71         0      Not Applicable
  04/18/2026 03 PM PDT            5.52             71         0      Not Applicable
  04/18/2026 04 PM PDT            5.51             70         -      Not Applicable
  04/18/2026 05 PM PDT            5.50             69         -      Not Applicable
  04/18/2026 06 PM PDT            5.50             69         0      Not Applicable
  04/18/2026 07 PM PDT            5.51             70         +      Not Applicable
  04/18/2026 08 PM PDT            5.50             69         -      Not Applicable
  04/18/2026 09 PM PDT            5.50             69         0      Not Applicable
  04/18/2026 10 PM PDT            5.50             69         0      Not Applicable
  04/18/2026 11 PM PDT            5.50             69         0      Not Applicable
  04/19/2026 12 AM PDT            5.50             69         0      Not Applicable
  04/19/2026 01 AM PDT            5.50             69         0      Not Applicable
  04/19/2026 02 AM PDT            5.50             69         0      Not Applicable
  04/19/2026 03 AM PDT            5.49             68         -      Not Applicable
  04/19/2026 04 AM PDT            5.49             68         0      Not Applicable
  04/19/2026 05 AM PDT            5.49             68         0      Not Applicable
  04/19/2026 06 AM PDT            5.49             68         0      Not Applicable
  04/19/2026 07 AM PDT            5.49             68         0      Not Applicable
  04/19/2026 08 AM PDT            5.49             68         0      Not Applicable
  04/19/2026 09 AM PDT            5.48             66         -      Not Applicable
  04/19/2026 10 AM PDT            5.48             66         0      Not Applicable
  04/19/2026 11 AM PDT            5.47             65         -      Not Applicable
  04/19/2026 12 PM PDT            5.47             65         0      Not Applicable
  04/19/2026 01 PM PDT            5.46             64         -      Not Applicable
  04/19/2026 02 PM PDT            5.46             64         0      Not Applicable
  04/19/2026 03 PM PDT            5.47             65         +      Not Applicable
  04/19/2026 04 PM PDT            5.47             65         0      Not Applicable
  04/19/2026 05 PM PDT            5.46             64         -      Not Applicable
  04/19/2026 06 PM PDT            5.46             64         0      Not Applicable
  04/19/2026 07 PM PDT            5.46             64         0      Not Applicable
  04/19/2026 08 PM PDT            5.46             64         0      Not Applicable
  04/19/2026 09 PM PDT            5.46             64         0      Not Applicable
  04/19/2026 10 PM PDT            5.45             63         -      Not Applicable
  04/19/2026 11 PM PDT            5.45             63         0      Not Applicable
  04/20/2026 12 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 01 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 02 AM PDT            5.45             63         0      Not Applicable
  04/20/2026 03 AM PDT            5.45             63         0      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            5.46             64         +      Not Applicable
  04/20/2026 07 AM PDT            5.47             65         +      Not Applicable
  04/20/2026 08 AM PDT            5.49             68         +      Not Applicable
  04/20/2026 09 AM PDT            5.50             69         +      Not Applicable
  04/20/2026 10 AM PDT            5.52             71         +      Not Applicable
  04/20/2026 11 AM PDT            5.54             73         +      Not Applicable
  04/20/2026 12 PM PDT            5.56             76         +      Not Applicable
  04/20/2026 01 PM PDT            5.59             79         +      Not Applicable
  04/20/2026 02 PM PDT            5.61             82         +      Not Applicable
  04/20/2026 03 PM PDT            5.63             84         +      Not Applicable
  04/20/2026 04 PM PDT            5.65             87         +      Not Applicable
  04/20/2026 05 PM PDT            5.67             90         +      Not Applicable
  04/20/2026 06 PM PDT            5.70             94         +      Not Applicable
  04/20/2026 07 PM PDT            5.74             98         +      Not Applicable
  04/20/2026 08 PM PDT            5.77            102         +      Not Applicable
  04/20/2026 09 PM PDT            5.81            107         +      Not Applicable
  04/20/2026 10 PM PDT            5.86            113         +      Not Applicable
  04/20/2026 11 PM PDT            5.91            119         +      Not Applicable
  04/21/2026 12 AM PDT            5.98            129         +      Not Applicable
  04/21/2026 01 AM PDT            6.04            137         +      Not Applicable
  04/21/2026 02 AM PDT            6.15            153         +      Not Applicable
  04/21/2026 03 AM PDT            6.26            171         +      Not Applicable
  04/21/2026 04 AM PDT            6.34            185         +      Not Applicable
  04/21/2026 05 AM PDT            6.42            199         +      Not Applicable
  04/21/2026 06 AM PDT            6.45            204         +      Not Applicable
  04/21/2026 07 AM PDT            6.48            210         +      Not Applicable
  04/21/2026 08 AM PDT            6.52            217         +      Not Applicable
  04/21/2026 09 AM PDT            6.52            217         0      Not Applicable
  04/21/2026 10 AM PDT            6.53            219         +      Not Applicable
  04/21/2026 11 AM PDT            6.52            217         -      Not Applicable
  04/21/2026 12 PM PDT            6.50            214         -      Not Applicable
  04/21/2026 01 PM PDT            6.51            216         +      Not Applicable
  04/21/2026 02 PM PDT            6.50            214         -      Not Applicable
  04/21/2026 03 PM PDT            6.49            212         -      Not Applicable
  04/21/2026 04 PM PDT            6.49            212         0      Not Applicable
  04/21/2026 05 PM PDT            6.49            212         0      Not Applicable
  04/21/2026 06 PM PDT            6.53            219         +      Not Applicable
  04/21/2026 07 PM PDT            6.57            227         +      Not Applicable
  04/21/2026 08 PM PDT            6.62            237         +      Not Applicable
  04/21/2026 09 PM PDT            6.70            254         +      Not Applicable
  04/21/2026 10 PM PDT            6.71            256         +      Not Applicable
  04/21/2026 11 PM PDT            6.69            252         -      Not Applicable
  04/22/2026 12 AM PDT            6.68            250         -      Not Applicable
  04/22/2026 01 AM PDT            6.67            248         -      Not Applicable
  04/22/2026 02 AM PDT            6.66            246         -      Not Applicable
  04/22/2026 03 AM PDT            6.64            241         -      Not Applicable
  04/22/2026 04 AM PDT            6.63            239         -      Not Applicable
  04/22/2026 05 AM PDT            6.62            237         -      Not Applicable
  04/22/2026 06 AM PDT            6.59            231         -      Not Applicable
  04/22/2026 07 AM PDT            6.61            235         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/22/2026 08 AM PDT            6.69            252                Not Applicable
  04/22/2026 09 AM PDT            6.81            278         +      Not Applicable
  04/22/2026 10 AM PDT            6.94            308         +      Not Applicable
  04/22/2026 11 AM PDT            7.07            341         +      Not Applicable
  04/22/2026 12 PM PDT            7.16            365         +      Not Applicable
  04/22/2026 01 PM PDT            7.21            378         +      Not Applicable
  04/22/2026 02 PM PDT            7.22            381         +      Not Applicable
  04/22/2026 03 PM PDT            7.21            378         -      Not Applicable
  04/22/2026 04 PM PDT            7.18            370         -      Not Applicable
  04/22/2026 05 PM PDT            7.13            357         -      Not Applicable
  04/22/2026 06 PM PDT            7.07            341         -      Not Applicable
  04/22/2026 07 PM PDT            6.99            321         -      Not Applicable
  04/22/2026 08 PM PDT            6.90            299         -      Not Applicable
  04/22/2026 09 PM PDT            6.81            278         -      Not Applicable
  04/22/2026 10 PM PDT            6.72            258         -      Not Applicable
  04/22/2026 11 PM PDT            6.63            239         -      Not Applicable
  04/23/2026 12 AM PDT            6.54            221         -      Not Applicable
  04/23/2026 01 AM PDT            6.45            204         -      Not Applicable
  04/23/2026 02 AM PDT            6.36            188         -      Not Applicable
  04/23/2026 03 AM PDT            6.27            173         -      Not Applicable
  04/23/2026 04 AM PDT            6.19            160         -      Not Applicable
  04/23/2026 05 AM PDT            6.11            147         -      Not Applicable
  04/23/2026 06 AM PDT            6.05            139         -      Not Applicable
  04/23/2026 07 AM PDT            6.00            131         -      Not Applicable
  04/23/2026 08 AM PDT            5.96            126         -      Not Applicable
  04/23/2026 09 AM PDT            5.92            121         -      Not Applicable
  04/23/2026 10 AM PDT            5.88            115         -      Not Applicable
  04/23/2026 11 AM PDT            5.85            112         -      Not Applicable
  04/23/2026 12 PM PDT            5.82            108         -      Not Applicable
  04/23/2026 01 PM PDT            5.80            106         -      Not Applicable
  04/23/2026 02 PM PDT            5.78            103         -      Not Applicable
  04/23/2026 03 PM PDT            5.76            101         -      Not Applicable
  04/23/2026 04 PM PDT            5.74             98         -      Not Applicable
  04/23/2026 05 PM PDT            5.72             96         -      Not Applicable
  04/23/2026 06 PM PDT            5.71             95         -      Not Applicable
  04/23/2026 07 PM PDT            5.70             94         -      Not Applicable
  04/23/2026 08 PM PDT            5.69             92         -      Not Applicable
  04/23/2026 09 PM PDT            5.68             91         -      Not Applicable
  04/23/2026 10 PM PDT            5.68             91         0      Not Applicable
  04/23/2026 11 PM PDT            5.67             90         -      Not Applicable
  04/24/2026 12 AM PDT            5.67             90         0      Not Applicable
  04/24/2026 01 AM PDT            5.66             88         -      Not Applicable
  04/24/2026 02 AM PDT            5.66             88         0      Not Applicable
  04/24/2026 03 AM PDT            5.65             87         -      Not Applicable
  04/24/2026 04 AM PDT            5.65             87         0      Not Applicable
  04/24/2026 05 AM PDT            5.64             86         -      Not Applicable
  04/24/2026 06 AM PDT            5.64             86         0      Not Applicable
  04/24/2026 07 AM PDT            5.64             86         0      Not Applicable
  04/24/2026 08 AM PDT            5.63             84         -      Not Applicable
  04/24/2026 09 AM PDT            5.63             84         0      Not Applicable
  04/24/2026 10 AM PDT            5.63             84         0      Not Applicable
  04/24/2026 11 AM PDT            5.62             83         -      Not Applicable
  04/24/2026 12 PM PDT            5.62             83         0      Not Applicable
  04/24/2026 01 PM PDT            5.62             83         0      Not Applicable
  04/24/2026 02 PM PDT            5.62             83         0      Not Applicable
  04/24/2026 03 PM PDT            5.61             82         -      Not Applicable
  04/24/2026 04 PM PDT            5.61             82         0      Not Applicable
  04/24/2026 05 PM PDT            5.61             82         0      Not Applicable
  04/24/2026 06 PM PDT            5.60             81         -      Not Applicable
  04/24/2026 07 PM PDT            5.60             81         0      Not Applicable
  04/24/2026 08 PM PDT            5.60             81         0      Not Applicable
  04/24/2026 09 PM PDT            5.60             81         0      Not Applicable
  04/24/2026 10 PM PDT            5.59             79         -      Not Applicable
  04/24/2026 11 PM PDT            5.59             79         0      Not Applicable
  04/25/2026 12 AM PDT            5.59             79         0      Not Applicable
  04/25/2026 01 AM PDT            5.59             79         0      Not Applicable
  04/25/2026 02 AM PDT            5.58             78         -      Not Applicable
  04/25/2026 03 AM PDT            5.58             78         0      Not Applicable
  04/25/2026 04 AM PDT            5.58             78         0      Not Applicable
  04/25/2026 05 AM PDT            5.58             78         0      Not Applicable
  04/25/2026 06 AM PDT            5.58             78         0      Not Applicable
  04/25/2026 07 AM PDT            5.57             77         -      Not Applicable
  04/25/2026 08 AM PDT            5.57             77         0      Not Applicable
  04/25/2026 09 AM PDT            5.57             77         0      Not Applicable
  04/25/2026 10 AM PDT            5.57             77         0      Not Applicable
  04/25/2026 11 AM PDT            5.56             76         -      Not Applicable
  04/25/2026 12 PM PDT            5.56             76         0      Not Applicable
  04/25/2026 01 PM PDT            5.56             76         0      Not Applicable
  04/25/2026 02 PM PDT            5.56             76         0      Not Applicable
  04/25/2026 03 PM PDT            5.56             76         0      Not Applicable
  04/25/2026 04 PM PDT            5.55             75         -      Not Applicable
  04/25/2026 05 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 06 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 07 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 08 PM PDT            5.54             73         -      Not Applicable
  04/25/2026 09 PM PDT            5.54             73         0      Not Applicable
  04/25/2026 10 PM PDT            5.54             73         0      Not Applicable
  04/25/2026 11 PM PDT            5.54             73         0      Not Applicable
  04/26/2026 12 AM PDT            5.54             73         0      Not Applicable
  04/26/2026 01 AM PDT            5.54             73         0      Not Applicable
  04/26/2026 02 AM PDT            5.53             72         -      Not Applicable
  04/26/2026 03 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 04 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 05 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 06 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 07 AM PDT            5.52             71         -      Not Applicable
  04/26/2026 08 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 09 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 10 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 11 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 12 PM PDT            5.51             70         -      Not Applicable
  04/26/2026 01 PM PDT            5.51             70         0      Not Applicable
  04/26/2026 02 PM PDT            5.51             70         0      Not Applicable
  04/26/2026 03 PM PDT            5.51             70         0      Not Applicable
  04/26/2026 04 PM PDT            5.51             70         0      Not Applicable
  04/26/2026 05 PM PDT            5.50             69         -      Not Applicable
  04/26/2026 06 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 07 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 08 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 09 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 10 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 11 PM PDT            5.50             69         0      Not Applicable
  04/27/2026 12 AM PDT            5.49             68         -      Not Applicable
  04/27/2026 01 AM PDT            5.49             68         0      Not Applicable
  04/27/2026 02 AM PDT            5.49             68         0      Not Applicable
  04/27/2026 03 AM PDT            5.49             68         0      Not Applicable
  04/27/2026 04 AM PDT            5.49             68         0      Not Applicable
  04/27/2026 05 AM PDT            5.48             66         -      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.