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 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: Big Sulphur Creek - Cloverdale (BSCC1)
#
# 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 01:00 AM PDT
# Maximum Observed Stage:                       17.53 Feet
# Maximum Observed Flow:                        386 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/22/2026 at 01:00 PM PDT
# Maximum Forecast Stage:                       17.22 Feet
# Maximum Forecast Flow:                        302 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  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           16.11             87         0      Not Applicable
  04/17/2026 11 AM PDT           16.10             85         -      Not Applicable
  04/17/2026 12 PM PDT           16.11             87         +      Not Applicable
  04/17/2026 01 PM PDT           16.11             87         0      Not Applicable
  04/17/2026 02 PM PDT           16.11             87         0      Not Applicable
  04/17/2026 03 PM PDT           16.11             87         0      Not Applicable
  04/17/2026 04 PM PDT           16.10             85         -      Not Applicable
  04/17/2026 05 PM PDT           16.09             84         -      Not Applicable
  04/17/2026 06 PM PDT           16.09             84         0      Not Applicable
  04/17/2026 07 PM PDT           16.08             83         -      Not Applicable
  04/17/2026 08 PM PDT           16.08             83         0      Not Applicable
  04/17/2026 09 PM PDT           16.07             81         -      Not Applicable
  04/17/2026 10 PM PDT           16.07             81         0      Not Applicable
  04/17/2026 11 PM PDT           16.06             80         -      Not Applicable
  04/18/2026 12 AM PDT           16.06             80         0      Not Applicable
  04/18/2026 01 AM PDT           16.05             79         -      Not Applicable
  04/18/2026 02 AM PDT           16.05             79         0      Not Applicable
  04/18/2026 03 AM PDT           16.05             79         0      Not Applicable
  04/18/2026 04 AM PDT           16.05             79         0      Not Applicable
  04/18/2026 05 AM PDT           16.05             79         0      Not Applicable
  04/18/2026 06 AM PDT           16.05             79         0      Not Applicable
  04/18/2026 07 AM PDT           16.04             77         -      Not Applicable
  04/18/2026 08 AM PDT           16.04             77         0      Not Applicable
  04/18/2026 09 AM PDT           16.04             77         0      Not Applicable
  04/18/2026 10 AM PDT           16.04             77         0      Not Applicable
  04/18/2026 11 AM PDT           16.05             79         +      Not Applicable
  04/18/2026 12 PM PDT           16.05             79         0      Not Applicable
  04/18/2026 01 PM PDT           16.04             77         -      Not Applicable
  04/18/2026 02 PM PDT           16.05             79         +      Not Applicable
  04/18/2026 03 PM PDT           16.04             77         -      Not Applicable
  04/18/2026 04 PM PDT           16.04             77         0      Not Applicable
  04/18/2026 05 PM PDT           16.04             77         0      Not Applicable
  04/18/2026 06 PM PDT           16.03             76         -      Not Applicable
  04/18/2026 07 PM PDT           16.03             76         0      Not Applicable
  04/18/2026 08 PM PDT           16.02             75         -      Not Applicable
  04/18/2026 09 PM PDT           16.02             75         0      Not Applicable
  04/18/2026 10 PM PDT           16.01             74         -      Not Applicable
  04/18/2026 11 PM PDT           16.01             74         0      Not Applicable
  04/19/2026 12 AM PDT           16.01             74         0      Not Applicable
  04/19/2026 01 AM PDT           16.00             73         -      Not Applicable
  04/19/2026 02 AM PDT           16.00             73         0      Not Applicable
  04/19/2026 03 AM PDT           16.01             74         +      Not Applicable
  04/19/2026 04 AM PDT           16.00             73         -      Not Applicable
  04/19/2026 05 AM PDT           16.00             73         0      Not Applicable
  04/19/2026 06 AM PDT           15.99             71         -      Not Applicable
  04/19/2026 07 AM PDT           16.00             73         +      Not Applicable
  04/19/2026 08 AM PDT           16.00             73         0      Not Applicable
  04/19/2026 09 AM PDT           16.00             73         0      Not Applicable
  04/19/2026 10 AM PDT           16.00             73         0      Not Applicable
  04/19/2026 11 AM PDT           16.00             73         0      Not Applicable
  04/19/2026 12 PM PDT           16.00             73         0      Not Applicable
  04/19/2026 01 PM PDT           16.00             73         0      Not Applicable
  04/19/2026 02 PM PDT           16.00             73         0      Not Applicable
  04/19/2026 03 PM PDT           16.00             73         0      Not Applicable
  04/19/2026 04 PM PDT           15.99             71         -      Not Applicable
  04/19/2026 05 PM PDT           15.99             71         0      Not Applicable
  04/19/2026 06 PM PDT           15.99             71         0      Not Applicable
  04/19/2026 07 PM PDT           15.98             70         -      Not Applicable
  04/19/2026 08 PM PDT           15.98             70         0      Not Applicable
  04/19/2026 09 PM PDT           15.97             69         -      Not Applicable
  04/19/2026 10 PM PDT           15.97             69         0      Not Applicable
  04/19/2026 11 PM PDT           15.97             69         0      Not Applicable
  04/20/2026 12 AM PDT           15.96             68         -      Not Applicable
  04/20/2026 01 AM PDT           15.96             68         0      Not Applicable
  04/20/2026 02 AM PDT           15.97             69         +      Not Applicable
  04/20/2026 03 AM PDT           15.96             68         -      Not Applicable
  04/20/2026 04 AM PDT           15.96             68         0      Not Applicable
  04/20/2026 05 AM PDT           15.96             68         0      Not Applicable
  04/20/2026 06 AM PDT           15.96             68         0      Not Applicable
  04/20/2026 07 AM PDT           15.97             69         +      Not Applicable
  04/20/2026 08 AM PDT           15.97             69         0      Not Applicable
  04/20/2026 09 AM PDT           15.97             69         0      Not Applicable
  04/20/2026 10 AM PDT           15.98             70         +      Not Applicable
  04/20/2026 11 AM PDT           15.99             71         +      Not Applicable
  04/20/2026 12 PM PDT           15.98             70         -      Not Applicable
  04/20/2026 01 PM PDT           16.01             74         +      Not Applicable
  04/20/2026 02 PM PDT           16.02             75         +      Not Applicable
  04/20/2026 03 PM PDT           16.05             79         +      Not Applicable
  04/20/2026 04 PM PDT           16.08             83         +      Not Applicable
  04/20/2026 05 PM PDT           16.12             88         +      Not Applicable
  04/20/2026 06 PM PDT           16.17             95         +      Not Applicable
  04/20/2026 07 PM PDT           16.23            104         +      Not Applicable
  04/20/2026 08 PM PDT           16.30            114         +      Not Applicable
  04/20/2026 09 PM PDT           16.44            138         +      Not Applicable
  04/20/2026 10 PM PDT           16.76            197         +      Not Applicable
  04/20/2026 11 PM PDT           17.39            347         +      Not Applicable
  04/21/2026 12 AM PDT           17.50            378         +      Not Applicable
  04/21/2026 01 AM PDT           17.53            386         +      Not Applicable
  04/21/2026 02 AM PDT           17.41            352         -      Not Applicable
  04/21/2026 03 AM PDT           17.38            344         -      Not Applicable
  04/21/2026 04 AM PDT           17.29            320         -      Not Applicable
  04/21/2026 05 AM PDT           17.25            309         -      Not Applicable
  04/21/2026 06 AM PDT           17.17            289         -      Not Applicable
  04/21/2026 07 AM PDT           17.14            282         -      Not Applicable
  04/21/2026 08 AM PDT           17.08            267         -      Not Applicable
  04/21/2026 09 AM PDT           17.04            258         -      Not Applicable
  04/21/2026 10 AM PDT           17.04            258         0      Not Applicable
  04/21/2026 11 AM PDT           17.03            255         -      Not Applicable
  04/21/2026 12 PM PDT           17.00            249         -      Not Applicable
  04/21/2026 01 PM PDT           16.94            235         -      Not Applicable
  04/21/2026 02 PM PDT           16.93            233         -      Not Applicable
  04/21/2026 03 PM PDT           16.93            233         0      Not Applicable
  04/21/2026 04 PM PDT           16.98            244         +      Not Applicable
  04/21/2026 05 PM PDT           16.99            246         +      Not Applicable
  04/21/2026 06 PM PDT           16.97            242         -      Not Applicable
  04/21/2026 07 PM PDT           16.96            239         -      Not Applicable
  04/21/2026 08 PM PDT           16.92            231         -      Not Applicable
  04/21/2026 09 PM PDT           16.88            222         -      Not Applicable
  04/21/2026 10 PM PDT           16.85            215         -      Not Applicable
  04/21/2026 11 PM PDT           16.82            209         -      Not Applicable
  04/22/2026 12 AM PDT           16.79            203         -      Not Applicable
  04/22/2026 01 AM PDT           16.78            201         -      Not Applicable
  04/22/2026 02 AM PDT           16.75            195         -      Not Applicable
  04/22/2026 03 AM PDT           16.74            193         -      Not Applicable
  04/22/2026 04 AM PDT           16.72            189         -      Not Applicable
  04/22/2026 05 AM PDT           16.73            191         +      Not Applicable
  04/22/2026 06 AM PDT           16.95            237         +      Not Applicable
  04/22/2026 07 AM PDT           17.05            260         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/22/2026 08 AM PDT           17.12            277                Not Applicable
  04/22/2026 09 AM PDT           17.16            287         +      Not Applicable
  04/22/2026 10 AM PDT           17.19            294         +      Not Applicable
  04/22/2026 11 AM PDT           17.20            297         +      Not Applicable
  04/22/2026 12 PM PDT           17.21            299         +      Not Applicable
  04/22/2026 01 PM PDT           17.22            302         +      Not Applicable
  04/22/2026 02 PM PDT           17.21            299         -      Not Applicable
  04/22/2026 03 PM PDT           17.18            292         -      Not Applicable
  04/22/2026 04 PM PDT           17.10            272         -      Not Applicable
  04/22/2026 05 PM PDT           16.96            239         -      Not Applicable
  04/22/2026 06 PM PDT           16.88            222         -      Not Applicable
  04/22/2026 07 PM PDT           16.84            213         -      Not Applicable
  04/22/2026 08 PM PDT           16.83            211         -      Not Applicable
  04/22/2026 09 PM PDT           16.81            207         -      Not Applicable
  04/22/2026 10 PM PDT           16.79            203         -      Not Applicable
  04/22/2026 11 PM PDT           16.75            195         -      Not Applicable
  04/23/2026 12 AM PDT           16.73            191         -      Not Applicable
  04/23/2026 01 AM PDT           16.73            191         0      Not Applicable
  04/23/2026 02 AM PDT           16.74            193         +      Not Applicable
  04/23/2026 03 AM PDT           16.74            193         0      Not Applicable
  04/23/2026 04 AM PDT           16.72            189         -      Not Applicable
  04/23/2026 05 AM PDT           16.68            181         -      Not Applicable
  04/23/2026 06 AM PDT           16.64            173         -      Not Applicable
  04/23/2026 07 AM PDT           16.62            170         -      Not Applicable
  04/23/2026 08 AM PDT           16.61            168         -      Not Applicable
  04/23/2026 09 AM PDT           16.59            164         -      Not Applicable
  04/23/2026 10 AM PDT           16.57            161         -      Not Applicable
  04/23/2026 11 AM PDT           16.54            155         -      Not Applicable
  04/23/2026 12 PM PDT           16.52            152         -      Not Applicable
  04/23/2026 01 PM PDT           16.52            152         0      Not Applicable
  04/23/2026 02 PM PDT           16.51            150         -      Not Applicable
  04/23/2026 03 PM PDT           16.50            148         -      Not Applicable
  04/23/2026 04 PM PDT           16.49            146         -      Not Applicable
  04/23/2026 05 PM PDT           16.47            143         -      Not Applicable
  04/23/2026 06 PM PDT           16.46            141         -      Not Applicable
  04/23/2026 07 PM PDT           16.45            139         -      Not Applicable
  04/23/2026 08 PM PDT           16.45            139         0      Not Applicable
  04/23/2026 09 PM PDT           16.44            138         -      Not Applicable
  04/23/2026 10 PM PDT           16.43            136         -      Not Applicable
  04/23/2026 11 PM PDT           16.42            134         -      Not Applicable
  04/24/2026 12 AM PDT           16.41            132         -      Not Applicable
  04/24/2026 01 AM PDT           16.41            132         0      Not Applicable
  04/24/2026 02 AM PDT           16.40            131         -      Not Applicable
  04/24/2026 03 AM PDT           16.40            131         0      Not Applicable
  04/24/2026 04 AM PDT           16.39            129         -      Not Applicable
  04/24/2026 05 AM PDT           16.38            127         -      Not Applicable
  04/24/2026 06 AM PDT           16.37            126         -      Not Applicable
  04/24/2026 07 AM PDT           16.37            126         0      Not Applicable
  04/24/2026 08 AM PDT           16.37            126         0      Not Applicable
  04/24/2026 09 AM PDT           16.36            124         -      Not Applicable
  04/24/2026 10 AM PDT           16.36            124         0      Not Applicable
  04/24/2026 11 AM PDT           16.34            121         -      Not Applicable
  04/24/2026 12 PM PDT           16.34            121         0      Not Applicable
  04/24/2026 01 PM PDT           16.34            121         0      Not Applicable
  04/24/2026 02 PM PDT           16.33            119         -      Not Applicable
  04/24/2026 03 PM PDT           16.33            119         0      Not Applicable
  04/24/2026 04 PM PDT           16.32            118         -      Not Applicable
  04/24/2026 05 PM PDT           16.31            116         -      Not Applicable
  04/24/2026 06 PM PDT           16.31            116         0      Not Applicable
  04/24/2026 07 PM PDT           16.30            114         -      Not Applicable
  04/24/2026 08 PM PDT           16.30            114         0      Not Applicable
  04/24/2026 09 PM PDT           16.30            114         0      Not Applicable
  04/24/2026 10 PM PDT           16.29            113         -      Not Applicable
  04/24/2026 11 PM PDT           16.28            111         -      Not Applicable
  04/25/2026 12 AM PDT           16.28            111         0      Not Applicable
  04/25/2026 01 AM PDT           16.27            110         -      Not Applicable
  04/25/2026 02 AM PDT           16.27            110         0      Not Applicable
  04/25/2026 03 AM PDT           16.27            110         0      Not Applicable
  04/25/2026 04 AM PDT           16.26            108         -      Not Applicable
  04/25/2026 05 AM PDT           16.26            108         0      Not Applicable
  04/25/2026 06 AM PDT           16.25            107         -      Not Applicable
  04/25/2026 07 AM PDT           16.25            107         0      Not Applicable
  04/25/2026 08 AM PDT           16.25            107         0      Not Applicable
  04/25/2026 09 AM PDT           16.24            105         -      Not Applicable
  04/25/2026 10 AM PDT           16.24            105         0      Not Applicable
  04/25/2026 11 AM PDT           16.23            104         -      Not Applicable
  04/25/2026 12 PM PDT           16.23            104         0      Not Applicable
  04/25/2026 01 PM PDT           16.22            102         -      Not Applicable
  04/25/2026 02 PM PDT           16.22            102         0      Not Applicable
  04/25/2026 03 PM PDT           16.22            102         0      Not Applicable
  04/25/2026 04 PM PDT           16.21            101         -      Not Applicable
  04/25/2026 05 PM PDT           16.21            101         0      Not Applicable
  04/25/2026 06 PM PDT           16.20             99         -      Not Applicable
  04/25/2026 07 PM PDT           16.20             99         0      Not Applicable
  04/25/2026 08 PM PDT           16.20             99         0      Not Applicable
  04/25/2026 09 PM PDT           16.20             99         0      Not Applicable
  04/25/2026 10 PM PDT           16.19             98         -      Not Applicable
  04/25/2026 11 PM PDT           16.18             96         -      Not Applicable
  04/26/2026 12 AM PDT           16.18             96         0      Not Applicable
  04/26/2026 01 AM PDT           16.18             96         0      Not Applicable
  04/26/2026 02 AM PDT           16.18             96         0      Not Applicable
  04/26/2026 03 AM PDT           16.17             95         -      Not Applicable
  04/26/2026 04 AM PDT           16.17             95         0      Not Applicable
  04/26/2026 05 AM PDT           16.16             94         -      Not Applicable
  04/26/2026 06 AM PDT           16.16             94         0      Not Applicable
  04/26/2026 07 AM PDT           16.16             94         0      Not Applicable
  04/26/2026 08 AM PDT           16.15             92         -      Not Applicable
  04/26/2026 09 AM PDT           16.15             92         0      Not Applicable
  04/26/2026 10 AM PDT           16.15             92         0      Not Applicable
  04/26/2026 11 AM PDT           16.14             91         -      Not Applicable
  04/26/2026 12 PM PDT           16.14             91         0      Not Applicable
  04/26/2026 01 PM PDT           16.14             91         0      Not Applicable
  04/26/2026 02 PM PDT           16.13             89         -      Not Applicable
  04/26/2026 03 PM PDT           16.13             89         0      Not Applicable
  04/26/2026 04 PM PDT           16.13             89         0      Not Applicable
  04/26/2026 05 PM PDT           16.12             88         -      Not Applicable
  04/26/2026 06 PM PDT           16.12             88         0      Not Applicable
  04/26/2026 07 PM PDT           16.12             88         0      Not Applicable
  04/26/2026 08 PM PDT           16.11             87         -      Not Applicable
  04/26/2026 09 PM PDT           16.11             87         0      Not Applicable
  04/26/2026 10 PM PDT           16.11             87         0      Not Applicable
  04/26/2026 11 PM PDT           16.10             85         -      Not Applicable
  04/27/2026 12 AM PDT           16.10             85         0      Not Applicable
  04/27/2026 01 AM PDT           16.10             85         0      Not Applicable
  04/27/2026 02 AM PDT           16.10             85         0      Not Applicable
  04/27/2026 03 AM PDT           16.09             84         -      Not Applicable
  04/27/2026 04 AM PDT           16.09             84         0      Not Applicable
  04/27/2026 05 AM PDT           16.09             84         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.