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

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BIG SULPHUR CREEK - CLOVERDALE (BSCC1)
Latitude: 38.83º NLongitude: 123.00º WElevation: 345 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: Big Sulphur Creek - Cloverdale (BSCC1)
#
# File Generation Time:  04/16/2026 at 07:21 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/11/2026 at 11:00 PM PDT
# Maximum Observed Stage:                       18.74 Feet
# Maximum Observed Flow:                        830 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/21/2026 at 03:00 AM PDT
# Maximum Forecast Stage:                       18.06 Feet
# Maximum Forecast Flow:                        558 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/11/2026 07 AM PDT           16.65            175                Not Applicable
  04/11/2026 08 AM PDT           16.58            162         -      Not Applicable
  04/11/2026 09 AM PDT           16.53            153         -      Not Applicable
  04/11/2026 10 AM PDT           16.49            146         -      Not Applicable
  04/11/2026 11 AM PDT           16.47            143         -      Not Applicable
  04/11/2026 12 PM PDT           16.44            138         -      Not Applicable
  04/11/2026 01 PM PDT           16.41            132         -      Not Applicable
  04/11/2026 02 PM PDT           16.38            127         -      Not Applicable
  04/11/2026 03 PM PDT           16.37            126         -      Not Applicable
  04/11/2026 04 PM PDT           16.37            126         0      Not Applicable
  04/11/2026 05 PM PDT           16.40            131         +      Not Applicable
  04/11/2026 06 PM PDT           16.46            141         +      Not Applicable
  04/11/2026 07 PM PDT           16.60            166         +      Not Applicable
  04/11/2026 08 PM PDT           17.00            249         +      Not Applicable
  04/11/2026 09 PM PDT           17.98            530         +      Not Applicable
  04/11/2026 10 PM PDT           18.59            765         +      Not Applicable
  04/11/2026 11 PM PDT           18.74            830         +      Not Applicable
  04/12/2026 12 AM PDT           18.50            727         -      Not Applicable
  04/12/2026 01 AM PDT           18.23            621         -      Not Applicable
  04/12/2026 02 AM PDT           18.05            555         -      Not Applicable
  04/12/2026 03 AM PDT           17.90            503         -      Not Applicable
  04/12/2026 04 AM PDT           17.83            479         -      Not Applicable
  04/12/2026 05 AM PDT           17.83            479         0      Not Applicable
  04/12/2026 06 AM PDT           17.90            503         +      Not Applicable
  04/12/2026 07 AM PDT           17.90            503         0      Not Applicable
  04/12/2026 08 AM PDT           17.85            486         -      Not Applicable
  04/12/2026 09 AM PDT           17.74            450         -      Not Applicable
  04/12/2026 10 AM PDT           17.67            428         -      Not Applicable
  04/12/2026 11 AM PDT           17.60            407         -      Not Applicable
  04/12/2026 12 PM PDT           17.53            386         -      Not Applicable
  04/12/2026 01 PM PDT           17.58            401         +      Not Applicable
  04/12/2026 02 PM PDT           17.59            404         +      Not Applicable
  04/12/2026 03 PM PDT           17.73            447         +      Not Applicable
  04/12/2026 04 PM PDT           18.00            537         +      Not Applicable
  04/12/2026 05 PM PDT           18.02            544         +      Not Applicable
  04/12/2026 06 PM PDT           17.90            503         -      Not Applicable
  04/12/2026 07 PM PDT           17.76            457         -      Not Applicable
  04/12/2026 08 PM PDT           17.65            422         -      Not Applicable
  04/12/2026 09 PM PDT           17.58            401         -      Not Applicable
  04/12/2026 10 PM PDT           17.48            372         -      Not Applicable
  04/12/2026 11 PM PDT           17.45            363         -      Not Applicable
  04/13/2026 12 AM PDT           17.39            347         -      Not Applicable
  04/13/2026 01 AM PDT           17.34            333         -      Not Applicable
  04/13/2026 02 AM PDT           17.29            320         -      Not Applicable
  04/13/2026 03 AM PDT           17.23            304         -      Not Applicable
  04/13/2026 04 AM PDT           17.17            289         -      Not Applicable
  04/13/2026 05 AM PDT           17.14            282         -      Not Applicable
  04/13/2026 06 AM PDT           17.08            267         -      Not Applicable
  04/13/2026 07 AM PDT           17.07            265         -      Not Applicable
  04/13/2026 08 AM PDT           17.03            255         -      Not Applicable
  04/13/2026 09 AM PDT           17.00            249         -      Not Applicable
  04/13/2026 10 AM PDT           16.97            242         -      Not Applicable
  04/13/2026 11 AM PDT           16.93            233         -      Not Applicable
  04/13/2026 12 PM PDT           16.91            228         -      Not Applicable
  04/13/2026 01 PM PDT           16.88            222         -      Not Applicable
  04/13/2026 02 PM PDT           16.86            218         -      Not Applicable
  04/13/2026 03 PM PDT           16.84            213         -      Not Applicable
  04/13/2026 04 PM PDT           16.80            205         -      Not Applicable
  04/13/2026 05 PM PDT           16.79            203         -      Not Applicable
  04/13/2026 06 PM PDT           16.77            199         -      Not Applicable
  04/13/2026 07 PM PDT           16.75            195         -      Not Applicable
  04/13/2026 08 PM PDT           16.73            191         -      Not Applicable
  04/13/2026 09 PM PDT           16.71            187         -      Not Applicable
  04/13/2026 10 PM PDT           16.69            183         -      Not Applicable
  04/13/2026 11 PM PDT           16.67            179         -      Not Applicable
  04/14/2026 12 AM PDT           16.65            175         -      Not Applicable
  04/14/2026 01 AM PDT           16.64            173         -      Not Applicable
  04/14/2026 02 AM PDT           16.63            172         -      Not Applicable
  04/14/2026 03 AM PDT           16.61            168         -      Not Applicable
  04/14/2026 04 AM PDT           16.60            166         -      Not Applicable
  04/14/2026 05 AM PDT           16.58            162         -      Not Applicable
  04/14/2026 06 AM PDT           16.57            161         -      Not Applicable
  04/14/2026 07 AM PDT           16.56            159         -      Not Applicable
  04/14/2026 08 AM PDT           16.55            157         -      Not Applicable
  04/14/2026 09 AM PDT           16.54            155         -      Not Applicable
  04/14/2026 10 AM PDT           16.53            153         -      Not Applicable
  04/14/2026 11 AM PDT           16.52            152         -      Not Applicable
  04/14/2026 12 PM PDT           16.52            152         0      Not Applicable
  04/14/2026 01 PM PDT           16.50            148         -      Not Applicable
  04/14/2026 02 PM PDT           16.50            148         0      Not Applicable
  04/14/2026 03 PM PDT           16.49            146         -      Not Applicable
  04/14/2026 04 PM PDT           16.48            145         -      Not Applicable
  04/14/2026 05 PM PDT           16.47            143         -      Not Applicable
  04/14/2026 06 PM PDT           16.46            141         -      Not Applicable
  04/14/2026 07 PM PDT           16.45            139         -      Not Applicable
  04/14/2026 08 PM PDT           16.44            138         -      Not Applicable
  04/14/2026 09 PM PDT           16.43            136         -      Not Applicable
  04/14/2026 10 PM PDT           16.42            134         -      Not Applicable
  04/14/2026 11 PM PDT           16.41            132         -      Not Applicable
  04/15/2026 12 AM PDT           16.40            131         -      Not Applicable
  04/15/2026 01 AM PDT           16.40            131         0      Not Applicable
  04/15/2026 02 AM PDT           16.38            127         -      Not Applicable
  04/15/2026 03 AM PDT           16.38            127         0      Not Applicable
  04/15/2026 04 AM PDT           16.37            126         -      Not Applicable
  04/15/2026 05 AM PDT           16.36            124         -      Not Applicable
  04/15/2026 06 AM PDT           16.36            124         0      Not Applicable
  04/15/2026 07 AM PDT           16.35            122         -      Not Applicable
  04/15/2026 08 AM PDT           16.34            121         -      Not Applicable
  04/15/2026 09 AM PDT           16.34            121         0      Not Applicable
  04/15/2026 10 AM PDT           16.34            121         0      Not Applicable
  04/15/2026 11 AM PDT           16.33            119         -      Not Applicable
  04/15/2026 12 PM PDT           16.33            119         0      Not Applicable
  04/15/2026 01 PM PDT           16.32            118         -      Not Applicable
  04/15/2026 02 PM PDT           16.32            118         0      Not Applicable
  04/15/2026 03 PM PDT           16.32            118         0      Not Applicable
  04/15/2026 04 PM PDT           16.30            114         -      Not Applicable
  04/15/2026 05 PM PDT           16.30            114         0      Not Applicable
  04/15/2026 06 PM PDT           16.30            114         0      Not Applicable
  04/15/2026 07 PM PDT           16.29            113         -      Not Applicable
  04/15/2026 08 PM PDT           16.28            111         -      Not Applicable
  04/15/2026 09 PM PDT           16.27            110         -      Not Applicable
  04/15/2026 10 PM PDT           16.26            108         -      Not Applicable
  04/15/2026 11 PM PDT           16.25            107         -      Not Applicable
  04/16/2026 12 AM PDT           16.25            107         0      Not Applicable
  04/16/2026 01 AM PDT           16.24            105         -      Not Applicable
  04/16/2026 02 AM PDT           16.23            104         -      Not Applicable
  04/16/2026 03 AM PDT           16.23            104         0      Not Applicable
  04/16/2026 04 AM PDT           16.23            104         0      Not Applicable
  04/16/2026 05 AM PDT           16.23            104         0      Not Applicable
  04/16/2026 06 AM PDT           16.22            102         -      Not Applicable
  04/16/2026 07 AM PDT           16.22            102         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/16/2026 08 AM PDT           16.21            101                Not Applicable
  04/16/2026 09 AM PDT           16.21            101         0      Not Applicable
  04/16/2026 10 AM PDT           16.20             99         -      Not Applicable
  04/16/2026 11 AM PDT           16.20             99         0      Not Applicable
  04/16/2026 12 PM PDT           16.19             98         -      Not Applicable
  04/16/2026 01 PM PDT           16.19             98         0      Not Applicable
  04/16/2026 02 PM PDT           16.19             98         0      Not Applicable
  04/16/2026 03 PM PDT           16.18             96         -      Not Applicable
  04/16/2026 04 PM PDT           16.18             96         0      Not Applicable
  04/16/2026 05 PM PDT           16.17             95         -      Not Applicable
  04/16/2026 06 PM PDT           16.17             95         0      Not Applicable
  04/16/2026 07 PM PDT           16.16             94         -      Not Applicable
  04/16/2026 08 PM PDT           16.16             94         0      Not Applicable
  04/16/2026 09 PM PDT           16.16             94         0      Not Applicable
  04/16/2026 10 PM PDT           16.15             92         -      Not Applicable
  04/16/2026 11 PM PDT           16.15             92         0      Not Applicable
  04/17/2026 12 AM PDT           16.14             91         -      Not Applicable
  04/17/2026 01 AM PDT           16.14             91         0      Not Applicable
  04/17/2026 02 AM PDT           16.14             91         0      Not Applicable
  04/17/2026 03 AM PDT           16.13             89         -      Not Applicable
  04/17/2026 04 AM PDT           16.13             89         0      Not Applicable
  04/17/2026 05 AM PDT           16.12             88         -      Not Applicable
  04/17/2026 06 AM PDT           16.12             88         0      Not Applicable
  04/17/2026 07 AM PDT           16.11             87         -      Not Applicable
  04/17/2026 08 AM PDT           16.11             87         0      Not Applicable
  04/17/2026 09 AM PDT           16.11             87         0      Not Applicable
  04/17/2026 10 AM PDT           16.10             85         -      Not Applicable
  04/17/2026 11 AM PDT           16.10             85         0      Not Applicable
  04/17/2026 12 PM PDT           16.09             84         -      Not Applicable
  04/17/2026 01 PM PDT           16.09             84         0      Not Applicable
  04/17/2026 02 PM PDT           16.09             84         0      Not Applicable
  04/17/2026 03 PM PDT           16.08             83         -      Not Applicable
  04/17/2026 04 PM PDT           16.08             83         0      Not Applicable
  04/17/2026 05 PM PDT           16.07             81         -      Not Applicable
  04/17/2026 06 PM PDT           16.07             81         0      Not Applicable
  04/17/2026 07 PM PDT           16.07             81         0      Not Applicable
  04/17/2026 08 PM PDT           16.06             80         -      Not Applicable
  04/17/2026 09 PM PDT           16.06             80         0      Not Applicable
  04/17/2026 10 PM PDT           16.05             79         -      Not Applicable
  04/17/2026 11 PM PDT           16.05             79         0      Not Applicable
  04/18/2026 12 AM PDT           16.05             79         0      Not Applicable
  04/18/2026 01 AM PDT           16.04             77         -      Not Applicable
  04/18/2026 02 AM PDT           16.04             77         0      Not Applicable
  04/18/2026 03 AM PDT           16.04             77         0      Not Applicable
  04/18/2026 04 AM PDT           16.03             76         -      Not Applicable
  04/18/2026 05 AM PDT           16.03             76         0      Not Applicable
  04/18/2026 06 AM PDT           16.02             75         -      Not Applicable
  04/18/2026 07 AM PDT           16.02             75         0      Not Applicable
  04/18/2026 08 AM PDT           16.02             75         0      Not Applicable
  04/18/2026 09 AM PDT           16.01             74         -      Not Applicable
  04/18/2026 10 AM PDT           16.01             74         0      Not Applicable
  04/18/2026 11 AM PDT           16.00             73         -      Not Applicable
  04/18/2026 12 PM PDT           16.00             73         0      Not Applicable
  04/18/2026 01 PM PDT           16.00             73         0      Not Applicable
  04/18/2026 02 PM PDT           15.99             71         -      Not Applicable
  04/18/2026 03 PM PDT           15.99             71         0      Not Applicable
  04/18/2026 04 PM PDT           15.99             71         0      Not Applicable
  04/18/2026 05 PM PDT           15.98             70         -      Not Applicable
  04/18/2026 06 PM PDT           15.98             70         0      Not Applicable
  04/18/2026 07 PM PDT           15.97             69         -      Not Applicable
  04/18/2026 08 PM PDT           15.97             69         0      Not Applicable
  04/18/2026 09 PM PDT           15.97             69         0      Not Applicable
  04/18/2026 10 PM PDT           15.97             69         0      Not Applicable
  04/18/2026 11 PM PDT           15.97             69         0      Not Applicable
  04/19/2026 12 AM PDT           15.96             68         -      Not Applicable
  04/19/2026 01 AM PDT           15.96             68         0      Not Applicable
  04/19/2026 02 AM PDT           15.96             68         0      Not Applicable
  04/19/2026 03 AM PDT           15.96             68         0      Not Applicable
  04/19/2026 04 AM PDT           15.96             68         0      Not Applicable
  04/19/2026 05 AM PDT           15.96             68         0      Not Applicable
  04/19/2026 06 AM PDT           15.95             67         -      Not Applicable
  04/19/2026 07 AM PDT           15.95             67         0      Not Applicable
  04/19/2026 08 AM PDT           15.95             67         0      Not Applicable
  04/19/2026 09 AM PDT           15.95             67         0      Not Applicable
  04/19/2026 10 AM PDT           15.95             67         0      Not Applicable
  04/19/2026 11 AM PDT           15.95             67         0      Not Applicable
  04/19/2026 12 PM PDT           15.94             65         -      Not Applicable
  04/19/2026 01 PM PDT           15.94             65         0      Not Applicable
  04/19/2026 02 PM PDT           15.94             65         0      Not Applicable
  04/19/2026 03 PM PDT           15.94             65         0      Not Applicable
  04/19/2026 04 PM PDT           15.94             65         0      Not Applicable
  04/19/2026 05 PM PDT           15.94             65         0      Not Applicable
  04/19/2026 06 PM PDT           15.93             64         -      Not Applicable
  04/19/2026 07 PM PDT           15.93             64         0      Not Applicable
  04/19/2026 08 PM PDT           15.93             64         0      Not Applicable
  04/19/2026 09 PM PDT           15.93             64         0      Not Applicable
  04/19/2026 10 PM PDT           15.93             64         0      Not Applicable
  04/19/2026 11 PM PDT           15.93             64         0      Not Applicable
  04/20/2026 12 AM PDT           15.93             64         0      Not Applicable
  04/20/2026 01 AM PDT           15.93             64         0      Not Applicable
  04/20/2026 02 AM PDT           15.93             64         0      Not Applicable
  04/20/2026 03 AM PDT           15.93             64         0      Not Applicable
  04/20/2026 04 AM PDT           15.95             67         +      Not Applicable
  04/20/2026 05 AM PDT           15.97             69         +      Not Applicable
  04/20/2026 06 AM PDT           15.98             70         +      Not Applicable
  04/20/2026 07 AM PDT           15.98             70         0      Not Applicable
  04/20/2026 08 AM PDT           15.99             71         +      Not Applicable
  04/20/2026 09 AM PDT           16.00             73         +      Not Applicable
  04/20/2026 10 AM PDT           16.01             74         +      Not Applicable
  04/20/2026 11 AM PDT           16.03             76         +      Not Applicable
  04/20/2026 12 PM PDT           16.05             79         +      Not Applicable
  04/20/2026 01 PM PDT           16.06             80         +      Not Applicable
  04/20/2026 02 PM PDT           16.08             83         +      Not Applicable
  04/20/2026 03 PM PDT           16.12             88         +      Not Applicable
  04/20/2026 04 PM PDT           16.20             99         +      Not Applicable
  04/20/2026 05 PM PDT           16.31            116         +      Not Applicable
  04/20/2026 06 PM PDT           16.39            129         +      Not Applicable
  04/20/2026 07 PM PDT           16.47            143         +      Not Applicable
  04/20/2026 08 PM PDT           16.57            161         +      Not Applicable
  04/20/2026 09 PM PDT           16.81            207         +      Not Applicable
  04/20/2026 10 PM PDT           17.16            287         +      Not Applicable
  04/20/2026 11 PM PDT           17.62            413         +      Not Applicable
  04/21/2026 12 AM PDT           17.87            493         +      Not Applicable
  04/21/2026 01 AM PDT           17.98            530         +      Not Applicable
  04/21/2026 02 AM PDT           18.04            551         +      Not Applicable
  04/21/2026 03 AM PDT           18.06            558         +      Not Applicable
  04/21/2026 04 AM PDT           18.04            551         -      Not Applicable
  04/21/2026 05 AM PDT           18.00            537         -      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.