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

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LAGUNA DE SANTA ROSA - SEBASTOPOL (LSEC1)
Latitude: 38.43º NLongitude: 122.83º WElevation: 50 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: 67.0 FeetMinor Flood: 69.0 FeetModerate Flood: N/A Major Flood: N/A
Please Note:

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Laguna De Santa Rosa - Sebastopol (LSEC1)
#
# File Generation Time:  04/23/2026 at 07:27 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/23/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       59.06 Feet
# Maximum Observed Flow:                        163 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/23/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       59.05 Feet
# Maximum Forecast Flow:                        162 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/18/2026 07 AM PDT           57.54             42                        Normal
  04/18/2026 08 AM PDT           57.54             42         0              Normal
  04/18/2026 09 AM PDT           57.53             42         -              Normal
  04/18/2026 10 AM PDT           57.52             42         -              Normal
  04/18/2026 11 AM PDT           57.52             42         0              Normal
  04/18/2026 12 PM PDT           57.51             41         -              Normal
  04/18/2026 01 PM PDT           57.50             41         -              Normal
  04/18/2026 02 PM PDT           57.50             41         0              Normal
  04/18/2026 03 PM PDT           57.49             40         -              Normal
  04/18/2026 04 PM PDT           57.48             40         -              Normal
  04/18/2026 05 PM PDT           57.47             40         -              Normal
  04/18/2026 06 PM PDT           57.47             40         0              Normal
  04/18/2026 07 PM PDT           57.46             39         -              Normal
  04/18/2026 08 PM PDT           57.45             39         -              Normal
  04/18/2026 09 PM PDT           57.44             38         -              Normal
  04/18/2026 10 PM PDT           57.43             38         -              Normal
  04/18/2026 11 PM PDT           57.43             38         0              Normal
  04/19/2026 12 AM PDT           57.42             38         -              Normal
  04/19/2026 01 AM PDT           57.41             37         -              Normal
  04/19/2026 02 AM PDT           57.41             37         0              Normal
  04/19/2026 03 AM PDT           57.40             37         -              Normal
  04/19/2026 04 AM PDT           57.39             36         -              Normal
  04/19/2026 05 AM PDT           57.39             36         0              Normal
  04/19/2026 06 AM PDT           57.38             36         -              Normal
  04/19/2026 07 AM PDT           57.38             36         0              Normal
  04/19/2026 08 AM PDT           57.37             36         -              Normal
  04/19/2026 09 AM PDT           57.36             35         -              Normal
  04/19/2026 10 AM PDT           57.36             35         0              Normal
  04/19/2026 11 AM PDT           57.35             35         -              Normal
  04/19/2026 12 PM PDT           57.35             35         0              Normal
  04/19/2026 01 PM PDT           57.34             35         -              Normal
  04/19/2026 02 PM PDT           57.34             35         0              Normal
  04/19/2026 03 PM PDT           57.33             34         -              Normal
  04/19/2026 04 PM PDT           57.32             34         -              Normal
  04/19/2026 05 PM PDT           57.31             33         -              Normal
  04/19/2026 06 PM PDT           57.31             33         0              Normal
  04/19/2026 07 PM PDT           57.30             33         -              Normal
  04/19/2026 08 PM PDT           57.30             33         0              Normal
  04/19/2026 09 PM PDT           57.29             33         -              Normal
  04/19/2026 10 PM PDT           57.28             32         -              Normal
  04/19/2026 11 PM PDT           57.28             32         0              Normal
  04/20/2026 12 AM PDT           57.27             32         -              Normal
  04/20/2026 01 AM PDT           57.26             32         -              Normal
  04/20/2026 02 AM PDT           57.26             32         0              Normal
  04/20/2026 03 AM PDT           57.25             31         -              Normal
  04/20/2026 04 AM PDT           57.25             31         0              Normal
  04/20/2026 05 AM PDT           57.24             31         -              Normal
  04/20/2026 06 AM PDT           57.24             31         0              Normal
  04/20/2026 07 AM PDT           57.24             31         0              Normal
  04/20/2026 08 AM PDT           57.23             31         -              Normal
  04/20/2026 09 AM PDT           57.23             31         0              Normal
  04/20/2026 10 AM PDT           57.23             31         0              Normal
  04/20/2026 11 AM PDT           57.23             31         0              Normal
  04/20/2026 12 PM PDT           57.23             31         0              Normal
  04/20/2026 01 PM PDT           57.25             31         +              Normal
  04/20/2026 02 PM PDT           57.26             32         +              Normal
  04/20/2026 03 PM PDT           57.29             33         +              Normal
  04/20/2026 04 PM PDT           57.32             34         +              Normal
  04/20/2026 05 PM PDT           57.34             35         +              Normal
  04/20/2026 06 PM PDT           57.37             36         +              Normal
  04/20/2026 07 PM PDT           57.40             37         +              Normal
  04/20/2026 08 PM PDT           57.43             38         +              Normal
  04/20/2026 09 PM PDT           57.45             39         +              Normal
  04/20/2026 10 PM PDT           57.49             40         +              Normal
  04/20/2026 11 PM PDT           57.53             42         +              Normal
  04/21/2026 12 AM PDT           57.57             44         +              Normal
  04/21/2026 01 AM PDT           57.61             45         +              Normal
  04/21/2026 02 AM PDT           57.65             47         +              Normal
  04/21/2026 03 AM PDT           57.69             49         +              Normal
  04/21/2026 04 AM PDT           57.72             50         +              Normal
  04/21/2026 05 AM PDT           57.76             52         +              Normal
  04/21/2026 06 AM PDT           57.79             54         +              Normal
  04/21/2026 07 AM PDT           57.82             55         +              Normal
  04/21/2026 08 AM PDT           57.85             57         +              Normal
  04/21/2026 09 AM PDT           57.88             58         +              Normal
  04/21/2026 10 AM PDT           57.91             60         +              Normal
  04/21/2026 11 AM PDT           57.94             62         +              Normal
  04/21/2026 12 PM PDT           57.96             63         +              Normal
  04/21/2026 01 PM PDT           57.99             64         +              Normal
  04/21/2026 02 PM PDT           58.02             66         +              Normal
  04/21/2026 03 PM PDT           58.05             68         +              Normal
  04/21/2026 04 PM PDT           58.09             70         +              Normal
  04/21/2026 05 PM PDT           58.13             72         +              Normal
  04/21/2026 06 PM PDT           58.16             74         +              Normal
  04/21/2026 07 PM PDT           58.21             76         +              Normal
  04/21/2026 08 PM PDT           58.25             78         +              Normal
  04/21/2026 09 PM PDT           58.29             81         +              Normal
  04/21/2026 10 PM PDT           58.33             83         +              Normal
  04/21/2026 11 PM PDT           58.37             85         +              Normal
  04/22/2026 12 AM PDT           58.41             88         +              Normal
  04/22/2026 01 AM PDT           58.45             91         +              Normal
  04/22/2026 02 AM PDT           58.49             94         +              Normal
  04/22/2026 03 AM PDT           58.53             97         +              Normal
  04/22/2026 04 AM PDT           58.57            100         +              Normal
  04/22/2026 05 AM PDT           58.61            103         +              Normal
  04/22/2026 06 AM PDT           58.64            105         +              Normal
  04/22/2026 07 AM PDT           58.67            109         +              Normal
  04/22/2026 08 AM PDT           58.71            114         +              Normal
  04/22/2026 09 AM PDT           58.74            117         +              Normal
  04/22/2026 10 AM PDT           58.77            121         +              Normal
  04/22/2026 11 AM PDT           58.80            125         +              Normal
  04/22/2026 12 PM PDT           58.83            129         +              Normal
  04/22/2026 01 PM PDT           58.85            133         +              Normal
  04/22/2026 02 PM PDT           58.87            136         +              Normal
  04/22/2026 03 PM PDT           58.89            139         +              Normal
  04/22/2026 04 PM PDT           58.91            142         +              Normal
  04/22/2026 05 PM PDT           58.92            144         +              Normal
  04/22/2026 06 PM PDT           58.94            147         +              Normal
  04/22/2026 07 PM PDT           58.95            148         +              Normal
  04/22/2026 08 PM PDT           58.96            150         +              Normal
  04/22/2026 09 PM PDT           58.97            151         +              Normal
  04/22/2026 10 PM PDT           58.98            152         +              Normal
  04/22/2026 11 PM PDT           59.00            155         +              Normal
  04/23/2026 12 AM PDT           59.01            156         +              Normal
  04/23/2026 01 AM PDT           59.02            157         +              Normal
  04/23/2026 02 AM PDT           59.03            159         +              Normal
  04/23/2026 03 AM PDT           59.04            160         +              Normal
  04/23/2026 04 AM PDT           59.05            162         +              Normal
  04/23/2026 05 AM PDT           59.06            163         +              Normal
  04/23/2026 06 AM PDT           59.06            163         0              Normal
  04/23/2026 07 AM PDT           59.06            163         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/23/2026 08 AM PDT           59.05            162                        Normal
  04/23/2026 09 AM PDT           59.05            162         0              Normal
  04/23/2026 10 AM PDT           59.04            160         -              Normal
  04/23/2026 11 AM PDT           59.04            160         0              Normal
  04/23/2026 12 PM PDT           59.04            160         0              Normal
  04/23/2026 01 PM PDT           59.03            159         -              Normal
  04/23/2026 02 PM PDT           59.03            159         0              Normal
  04/23/2026 03 PM PDT           59.02            157         -              Normal
  04/23/2026 04 PM PDT           59.02            157         0              Normal
  04/23/2026 05 PM PDT           59.01            156         -              Normal
  04/23/2026 06 PM PDT           59.00            155         -              Normal
  04/23/2026 07 PM PDT           58.99            154         -              Normal
  04/23/2026 08 PM PDT           58.99            154         0              Normal
  04/23/2026 09 PM PDT           58.98            152         -              Normal
  04/23/2026 10 PM PDT           58.98            152         0              Normal
  04/23/2026 11 PM PDT           58.97            151         -              Normal
  04/24/2026 12 AM PDT           58.97            151         0              Normal
  04/24/2026 01 AM PDT           58.97            151         0              Normal
  04/24/2026 02 AM PDT           58.96            150         -              Normal
  04/24/2026 03 AM PDT           58.96            150         0              Normal
  04/24/2026 04 AM PDT           58.96            150         0              Normal
  04/24/2026 05 AM PDT           58.96            150         0              Normal
  04/24/2026 06 AM PDT           58.96            150         0              Normal
  04/24/2026 07 AM PDT           58.96            150         0              Normal
  04/24/2026 08 AM PDT           58.97            151         +              Normal
  04/24/2026 09 AM PDT           58.97            151         0              Normal
  04/24/2026 10 AM PDT           58.97            151         0              Normal
  04/24/2026 11 AM PDT           58.97            151         0              Normal
  04/24/2026 12 PM PDT           58.96            150         -              Normal
  04/24/2026 01 PM PDT           58.94            147         -              Normal
  04/24/2026 02 PM PDT           58.92            144         -              Normal
  04/24/2026 03 PM PDT           58.90            141         -              Normal
  04/24/2026 04 PM PDT           58.88            138         -              Normal
  04/24/2026 05 PM PDT           58.86            135         -              Normal
  04/24/2026 06 PM PDT           58.84            131         -              Normal
  04/24/2026 07 PM PDT           58.82            128         -              Normal
  04/24/2026 08 PM PDT           58.80            125         -              Normal
  04/24/2026 09 PM PDT           58.78            122         -              Normal
  04/24/2026 10 PM PDT           58.76            120         -              Normal
  04/24/2026 11 PM PDT           58.74            117         -              Normal
  04/25/2026 12 AM PDT           58.72            115         -              Normal
  04/25/2026 01 AM PDT           58.70            112         -              Normal
  04/25/2026 02 AM PDT           58.67            109         -              Normal
  04/25/2026 03 AM PDT           58.64            105         -              Normal
  04/25/2026 04 AM PDT           58.62            103         -              Normal
  04/25/2026 05 AM PDT           58.59            101         -              Normal
  04/25/2026 06 AM PDT           58.57            100         -              Normal
  04/25/2026 07 AM PDT           58.54             97         -              Normal
  04/25/2026 08 AM PDT           58.52             96         -              Normal
  04/25/2026 09 AM PDT           58.49             94         -              Normal
  04/25/2026 10 AM PDT           58.47             92         -              Normal
  04/25/2026 11 AM PDT           58.44             90         -              Normal
  04/25/2026 12 PM PDT           58.41             88         -              Normal
  04/25/2026 01 PM PDT           58.39             86         -              Normal
  04/25/2026 02 PM PDT           58.36             85         -              Normal
  04/25/2026 03 PM PDT           58.33             83         -              Normal
  04/25/2026 04 PM PDT           58.31             82         -              Normal
  04/25/2026 05 PM PDT           58.28             80         -              Normal
  04/25/2026 06 PM PDT           58.26             79         -              Normal
  04/25/2026 07 PM PDT           58.24             78         -              Normal
  04/25/2026 08 PM PDT           58.21             76         -              Normal
  04/25/2026 09 PM PDT           58.19             75         -              Normal
  04/25/2026 10 PM PDT           58.17             74         -              Normal
  04/25/2026 11 PM PDT           58.15             73         -              Normal
  04/26/2026 12 AM PDT           58.13             72         -              Normal
  04/26/2026 01 AM PDT           58.11             71         -              Normal
  04/26/2026 02 AM PDT           58.09             70         -              Normal
  04/26/2026 03 AM PDT           58.06             68         -              Normal
  04/26/2026 04 AM PDT           58.04             67         -              Normal
  04/26/2026 05 AM PDT           58.02             66         -              Normal
  04/26/2026 06 AM PDT           58.01             65         -              Normal
  04/26/2026 07 AM PDT           57.99             64         -              Normal
  04/26/2026 08 AM PDT           57.97             63         -              Normal
  04/26/2026 09 AM PDT           57.95             62         -              Normal
  04/26/2026 10 AM PDT           57.93             61         -              Normal
  04/26/2026 11 AM PDT           57.92             61         -              Normal
  04/26/2026 12 PM PDT           57.90             60         -              Normal
  04/26/2026 01 PM PDT           57.88             58         -              Normal
  04/26/2026 02 PM PDT           57.86             57         -              Normal
  04/26/2026 03 PM PDT           57.85             57         -              Normal
  04/26/2026 04 PM PDT           57.83             56         -              Normal
  04/26/2026 05 PM PDT           57.81             55         -              Normal
  04/26/2026 06 PM PDT           57.80             54         -              Normal
  04/26/2026 07 PM PDT           57.78             53         -              Normal
  04/26/2026 08 PM PDT           57.76             52         -              Normal
  04/26/2026 09 PM PDT           57.75             52         -              Normal
  04/26/2026 10 PM PDT           57.73             51         -              Normal
  04/26/2026 11 PM PDT           57.72             50         -              Normal
  04/27/2026 12 AM PDT           57.70             50         -              Normal
  04/27/2026 01 AM PDT           57.69             49         -              Normal
  04/27/2026 02 AM PDT           57.67             48         -              Normal
  04/27/2026 03 AM PDT           57.66             48         -              Normal
  04/27/2026 04 AM PDT           57.65             47         -              Normal
  04/27/2026 05 AM PDT           57.63             46         -              Normal
  04/27/2026 06 AM PDT           57.62             46         -              Normal
  04/27/2026 07 AM PDT           57.60             45         -              Normal
  04/27/2026 08 AM PDT           57.59             44         -              Normal
  04/27/2026 09 AM PDT           57.58             44         -              Normal
  04/27/2026 10 AM PDT           57.56             43         -              Normal
  04/27/2026 11 AM PDT           57.55             43         -              Normal
  04/27/2026 12 PM PDT           57.54             42         -              Normal
  04/27/2026 01 PM PDT           57.52             42         -              Normal
  04/27/2026 02 PM PDT           57.51             41         -              Normal
  04/27/2026 03 PM PDT           57.50             41         -              Normal
  04/27/2026 04 PM PDT           57.49             40         -              Normal
  04/27/2026 05 PM PDT           57.48             40         -              Normal
  04/27/2026 06 PM PDT           57.46             39         -              Normal
  04/27/2026 07 PM PDT           57.45             39         -              Normal
  04/27/2026 08 PM PDT           57.44             38         -              Normal
  04/27/2026 09 PM PDT           57.43             38         -              Normal
  04/27/2026 10 PM PDT           57.42             38         -              Normal
  04/27/2026 11 PM PDT           57.40             37         -              Normal
  04/28/2026 12 AM PDT           57.39             36         -              Normal
  04/28/2026 01 AM PDT           57.38             36         -              Normal
  04/28/2026 02 AM PDT           57.37             36         -              Normal
  04/28/2026 03 AM PDT           57.36             35         -              Normal
  04/28/2026 04 AM PDT           57.35             35         -              Normal
  04/28/2026 05 AM PDT           57.34             35         -              Normal
#
# 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.