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 23 2026 at 7:26 AM PDTNext Issuance: Apr 24 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:  04/23/2026 at 07:27 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/22/2026 at 09:00 PM PDT
# Maximum Observed Stage:                       6.85 Feet
# Maximum Observed Flow:                        287 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/23/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       6.52 Feet
# Maximum Forecast Flow:                        217 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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            6.52            217         0      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            6.60            233         -      Not Applicable
  04/22/2026 07 AM PDT            6.61            235         +      Not Applicable
  04/22/2026 08 AM PDT            6.61            235         0      Not Applicable
  04/22/2026 09 AM PDT            6.61            235         0      Not Applicable
  04/22/2026 10 AM PDT            6.64            241         +      Not Applicable
  04/22/2026 11 AM PDT            6.66            246         +      Not Applicable
  04/22/2026 12 PM PDT            6.68            250         +      Not Applicable
  04/22/2026 01 PM PDT            6.69            252         +      Not Applicable
  04/22/2026 02 PM PDT            6.72            258         +      Not Applicable
  04/22/2026 03 PM PDT            6.73            260         +      Not Applicable
  04/22/2026 04 PM PDT            6.74            263         +      Not Applicable
  04/22/2026 05 PM PDT            6.76            267         +      Not Applicable
  04/22/2026 06 PM PDT            6.79            274         +      Not Applicable
  04/22/2026 07 PM PDT            6.84            285         +      Not Applicable
  04/22/2026 08 PM PDT            6.85            287         +      Not Applicable
  04/22/2026 09 PM PDT            6.85            287         0      Not Applicable
  04/22/2026 10 PM PDT            6.84            285         -      Not Applicable
  04/22/2026 11 PM PDT            6.80            276         -      Not Applicable
  04/23/2026 12 AM PDT            6.78            271         -      Not Applicable
  04/23/2026 01 AM PDT            6.75            265         -      Not Applicable
  04/23/2026 02 AM PDT            6.72            258         -      Not Applicable
  04/23/2026 03 AM PDT            6.71            256         -      Not Applicable
  04/23/2026 04 AM PDT            6.68            250         -      Not Applicable
  04/23/2026 05 AM PDT            6.65            243         -      Not Applicable
  04/23/2026 06 AM PDT            6.60            233         -      Not Applicable
  04/23/2026 07 AM PDT            6.56            225         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/23/2026 08 AM PDT            6.52            217                Not Applicable
  04/23/2026 09 AM PDT            6.49            212         -      Not Applicable
  04/23/2026 10 AM PDT            6.45            204         -      Not Applicable
  04/23/2026 11 AM PDT            6.42            199         -      Not Applicable
  04/23/2026 12 PM PDT            6.39            193         -      Not Applicable
  04/23/2026 01 PM PDT            6.37            190         -      Not Applicable
  04/23/2026 02 PM PDT            6.34            185         -      Not Applicable
  04/23/2026 03 PM PDT            6.32            181         -      Not Applicable
  04/23/2026 04 PM PDT            6.29            176         -      Not Applicable
  04/23/2026 05 PM PDT            6.27            173         -      Not Applicable
  04/23/2026 06 PM PDT            6.25            169         -      Not Applicable
  04/23/2026 07 PM PDT            6.23            166         -      Not Applicable
  04/23/2026 08 PM PDT            6.21            163         -      Not Applicable
  04/23/2026 09 PM PDT            6.19            160         -      Not Applicable
  04/23/2026 10 PM PDT            6.17            157         -      Not Applicable
  04/23/2026 11 PM PDT            6.15            153         -      Not Applicable
  04/24/2026 12 AM PDT            6.13            150         -      Not Applicable
  04/24/2026 01 AM PDT            6.12            149         -      Not Applicable
  04/24/2026 02 AM PDT            6.10            146         -      Not Applicable
  04/24/2026 03 AM PDT            6.08            143         -      Not Applicable
  04/24/2026 04 AM PDT            6.06            140         -      Not Applicable
  04/24/2026 05 AM PDT            6.04            137         -      Not Applicable
  04/24/2026 06 AM PDT            6.02            134         -      Not Applicable
  04/24/2026 07 AM PDT            6.01            133         -      Not Applicable
  04/24/2026 08 AM PDT            5.99            130         -      Not Applicable
  04/24/2026 09 AM PDT            5.97            127         -      Not Applicable
  04/24/2026 10 AM PDT            5.95            125         -      Not Applicable
  04/24/2026 11 AM PDT            5.93            122         -      Not Applicable
  04/24/2026 12 PM PDT            5.91            119         -      Not Applicable
  04/24/2026 01 PM PDT            5.89            117         -      Not Applicable
  04/24/2026 02 PM PDT            5.87            114         -      Not Applicable
  04/24/2026 03 PM PDT            5.85            112         -      Not Applicable
  04/24/2026 04 PM PDT            5.83            109         -      Not Applicable
  04/24/2026 05 PM PDT            5.81            107         -      Not Applicable
  04/24/2026 06 PM PDT            5.79            104         -      Not Applicable
  04/24/2026 07 PM PDT            5.77            102         -      Not Applicable
  04/24/2026 08 PM PDT            5.75            100         -      Not Applicable
  04/24/2026 09 PM PDT            5.72             96         -      Not Applicable
  04/24/2026 10 PM PDT            5.70             94         -      Not Applicable
  04/24/2026 11 PM PDT            5.68             91         -      Not Applicable
  04/25/2026 12 AM PDT            5.67             90         -      Not Applicable
  04/25/2026 01 AM PDT            5.65             87         -      Not Applicable
  04/25/2026 02 AM PDT            5.63             84         -      Not Applicable
  04/25/2026 03 AM PDT            5.61             82         -      Not Applicable
  04/25/2026 04 AM PDT            5.59             79         -      Not Applicable
  04/25/2026 05 AM PDT            5.57             77         -      Not Applicable
  04/25/2026 06 AM PDT            5.57             77         0      Not Applicable
  04/25/2026 07 AM PDT            5.57             77         0      Not Applicable
  04/25/2026 08 AM PDT            5.56             76         -      Not Applicable
  04/25/2026 09 AM PDT            5.56             76         0      Not Applicable
  04/25/2026 10 AM PDT            5.56             76         0      Not Applicable
  04/25/2026 11 AM PDT            5.56             76         0      Not Applicable
  04/25/2026 12 PM PDT            5.55             75         -      Not Applicable
  04/25/2026 01 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 02 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 03 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 04 PM PDT            5.55             75         0      Not Applicable
  04/25/2026 05 PM PDT            5.54             73         -      Not Applicable
  04/25/2026 06 PM PDT            5.54             73         0      Not Applicable
  04/25/2026 07 PM PDT            5.54             73         0      Not Applicable
  04/25/2026 08 PM PDT            5.54             73         0      Not Applicable
  04/25/2026 09 PM PDT            5.54             73         0      Not Applicable
  04/25/2026 10 PM PDT            5.53             72         -      Not Applicable
  04/25/2026 11 PM PDT            5.53             72         0      Not Applicable
  04/26/2026 12 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 01 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 02 AM PDT            5.53             72         0      Not Applicable
  04/26/2026 03 AM PDT            5.52             71         -      Not Applicable
  04/26/2026 04 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 05 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 06 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 07 AM PDT            5.52             71         0      Not Applicable
  04/26/2026 08 AM PDT            5.51             70         -      Not Applicable
  04/26/2026 09 AM PDT            5.51             70         0      Not Applicable
  04/26/2026 10 AM PDT            5.51             70         0      Not Applicable
  04/26/2026 11 AM PDT            5.51             70         0      Not Applicable
  04/26/2026 12 PM PDT            5.51             70         0      Not Applicable
  04/26/2026 01 PM PDT            5.51             70         0      Not Applicable
  04/26/2026 02 PM PDT            5.50             69         -      Not Applicable
  04/26/2026 03 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 04 PM PDT            5.50             69         0      Not Applicable
  04/26/2026 05 PM PDT            5.50             69         0      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            5.49             68         -      Not Applicable
  04/26/2026 09 PM PDT            5.49             68         0      Not Applicable
  04/26/2026 10 PM PDT            5.49             68         0      Not Applicable
  04/26/2026 11 PM PDT            5.49             68         0      Not Applicable
  04/27/2026 12 AM PDT            5.49             68         0      Not Applicable
  04/27/2026 01 AM PDT            5.49             68         0      Not Applicable
  04/27/2026 02 AM PDT            5.48             66         -      Not Applicable
  04/27/2026 03 AM PDT            5.48             66         0      Not Applicable
  04/27/2026 04 AM PDT            5.48             66         0      Not Applicable
  04/27/2026 05 AM PDT            5.48             66         0      Not Applicable
  04/27/2026 06 AM PDT            5.48             66         0      Not Applicable
  04/27/2026 07 AM PDT            5.47             65         -      Not Applicable
  04/27/2026 08 AM PDT            5.47             65         0      Not Applicable
  04/27/2026 09 AM PDT            5.47             65         0      Not Applicable
  04/27/2026 10 AM PDT            5.47             65         0      Not Applicable
  04/27/2026 11 AM PDT            5.47             65         0      Not Applicable
  04/27/2026 12 PM PDT            5.47             65         0      Not Applicable
  04/27/2026 01 PM PDT            5.46             64         -      Not Applicable
  04/27/2026 02 PM PDT            5.46             64         0      Not Applicable
  04/27/2026 03 PM PDT            5.46             64         0      Not Applicable
  04/27/2026 04 PM PDT            5.46             64         0      Not Applicable
  04/27/2026 05 PM PDT            5.46             64         0      Not Applicable
  04/27/2026 06 PM PDT            5.46             64         0      Not Applicable
  04/27/2026 07 PM PDT            5.46             64         0      Not Applicable
  04/27/2026 08 PM PDT            5.45             63         -      Not Applicable
  04/27/2026 09 PM PDT            5.45             63         0      Not Applicable
  04/27/2026 10 PM PDT            5.45             63         0      Not Applicable
  04/27/2026 11 PM PDT            5.45             63         0      Not Applicable
  04/28/2026 12 AM PDT            5.45             63         0      Not Applicable
  04/28/2026 01 AM PDT            5.45             63         0      Not Applicable
  04/28/2026 02 AM PDT            5.45             63         0      Not Applicable
  04/28/2026 03 AM PDT            5.44             62         -      Not Applicable
  04/28/2026 04 AM PDT            5.44             62         0      Not Applicable
  04/28/2026 05 AM PDT            5.44             62         0      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.