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

 | 

MATTOLE RIVER - ETTERSBURG (ETTC1)
Latitude: 40.14º NLongitude: 123.99º WElevation: 579 FeetForecast Type: Unofficial Location
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: May 03 2026 at 8:48 AM PDTNext Issuance: May 04 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: Mattole River - Ettersburg (ETTC1)
#
# File Generation Time:  05/03/2026 at 08:50 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/28/2026 at 06:00 PM PDT
# Maximum Observed Stage:                       9.24 Feet
# Maximum Observed Flow:                        89 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/03/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       9.12 Feet
# Maximum Forecast Flow:                        76 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/28/2026 08 AM PDT            9.24             89                Not Applicable
  04/28/2026 09 AM PDT            9.24             89         0      Not Applicable
  04/28/2026 10 AM PDT            9.24             89         0      Not Applicable
  04/28/2026 11 AM PDT            9.24             89         0      Not Applicable
  04/28/2026 12 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 01 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 02 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 03 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 04 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 05 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 06 PM PDT            9.24             89         0      Not Applicable
  04/28/2026 07 PM PDT            9.23             88         -      Not Applicable
  04/28/2026 08 PM PDT            9.23             88         0      Not Applicable
  04/28/2026 09 PM PDT            9.23             88         0      Not Applicable
  04/28/2026 10 PM PDT            9.22             87         -      Not Applicable
  04/28/2026 11 PM PDT            9.22             87         0      Not Applicable
  04/29/2026 12 AM PDT            9.22             87         0      Not Applicable
  04/29/2026 01 AM PDT            9.22             87         0      Not Applicable
  04/29/2026 02 AM PDT            9.22             87         0      Not Applicable
  04/29/2026 03 AM PDT            9.22             87         0      Not Applicable
  04/29/2026 04 AM PDT            9.21             86         -      Not Applicable
  04/29/2026 05 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 06 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 07 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 08 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 09 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 10 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 11 AM PDT            9.21             86         0      Not Applicable
  04/29/2026 12 PM PDT            9.21             86         0      Not Applicable
  04/29/2026 01 PM PDT            9.21             86         0      Not Applicable
  04/29/2026 02 PM PDT            9.21             86         0      Not Applicable
  04/29/2026 03 PM PDT            9.20             84         -      Not Applicable
  04/29/2026 04 PM PDT            9.21             86         +      Not Applicable
  04/29/2026 05 PM PDT            9.21             86         0      Not Applicable
  04/29/2026 06 PM PDT            9.21             86         0      Not Applicable
  04/29/2026 07 PM PDT            9.20             84         -      Not Applicable
  04/29/2026 08 PM PDT            9.20             84         0      Not Applicable
  04/29/2026 09 PM PDT            9.19             83         -      Not Applicable
  04/29/2026 10 PM PDT            9.20             84         +      Not Applicable
  04/29/2026 11 PM PDT            9.19             83         -      Not Applicable
  04/30/2026 12 AM PDT            9.19             83         0      Not Applicable
  04/30/2026 01 AM PDT            9.19             83         0      Not Applicable
  04/30/2026 02 AM PDT            9.19             83         0      Not Applicable
  04/30/2026 03 AM PDT            9.18             82         -      Not Applicable
  04/30/2026 04 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 05 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 06 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 07 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 08 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 09 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 10 AM PDT            9.18             82         0      Not Applicable
  04/30/2026 11 AM PDT            9.19             83         +      Not Applicable
  04/30/2026 12 PM PDT            9.19             83         0      Not Applicable
  04/30/2026 01 PM PDT            9.18             82         -      Not Applicable
  04/30/2026 02 PM PDT            9.19             83         +      Not Applicable
  04/30/2026 03 PM PDT            9.18             82         -      Not Applicable
  04/30/2026 04 PM PDT            9.19             83         +      Not Applicable
  04/30/2026 05 PM PDT            9.18             82         -      Not Applicable
  04/30/2026 06 PM PDT            9.18             82         0      Not Applicable
  04/30/2026 07 PM PDT            9.18             82         0      Not Applicable
  04/30/2026 08 PM PDT            9.18             82         0      Not Applicable
  04/30/2026 09 PM PDT            9.17             81         -      Not Applicable
  04/30/2026 10 PM PDT            9.17             81         0      Not Applicable
  04/30/2026 11 PM PDT            9.17             81         0      Not Applicable
  05/01/2026 12 AM PDT            9.17             81         0      Not Applicable
  05/01/2026 01 AM PDT            9.16             80         -      Not Applicable
  05/01/2026 02 AM PDT            9.17             81         +      Not Applicable
  05/01/2026 03 AM PDT            9.16             80         -      Not Applicable
  05/01/2026 04 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 05 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 06 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 07 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 08 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 09 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 10 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 11 AM PDT            9.16             80         0      Not Applicable
  05/01/2026 12 PM PDT            9.16             80         0      Not Applicable
  05/01/2026 01 PM PDT            9.16             80         0      Not Applicable
  05/01/2026 02 PM PDT            9.16             80         0      Not Applicable
  05/01/2026 03 PM PDT            9.16             80         0      Not Applicable
  05/01/2026 04 PM PDT            9.16             80         0      Not Applicable
  05/01/2026 05 PM PDT            9.16             80         0      Not Applicable
  05/01/2026 06 PM PDT            9.15             79         -      Not Applicable
  05/01/2026 07 PM PDT            9.16             80         +      Not Applicable
  05/01/2026 08 PM PDT            9.15             79         -      Not Applicable
  05/01/2026 09 PM PDT            9.15             79         0      Not Applicable
  05/01/2026 10 PM PDT            9.15             79         0      Not Applicable
  05/01/2026 11 PM PDT            9.15             79         0      Not Applicable
  05/02/2026 12 AM PDT            9.15             79         0      Not Applicable
  05/02/2026 01 AM PDT            9.14             79         -      Not Applicable
  05/02/2026 02 AM PDT            9.15             79         +      Not Applicable
  05/02/2026 03 AM PDT            9.15             79         0      Not Applicable
  05/02/2026 04 AM PDT            9.14             79         -      Not Applicable
  05/02/2026 05 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 06 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 07 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 08 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 09 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 10 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 11 AM PDT            9.14             79         0      Not Applicable
  05/02/2026 12 PM PDT            9.14             79         0      Not Applicable
  05/02/2026 01 PM PDT            9.14             79         0      Not Applicable
  05/02/2026 02 PM PDT            9.14             79         0      Not Applicable
  05/02/2026 03 PM PDT            9.14             79         0      Not Applicable
  05/02/2026 04 PM PDT            9.14             79         0      Not Applicable
  05/02/2026 05 PM PDT            9.13             78         -      Not Applicable
  05/02/2026 06 PM PDT            9.13             78         0      Not Applicable
  05/02/2026 07 PM PDT            9.13             78         0      Not Applicable
  05/02/2026 08 PM PDT            9.13             78         0      Not Applicable
  05/02/2026 09 PM PDT            9.13             78         0      Not Applicable
  05/02/2026 10 PM PDT            9.13             78         0      Not Applicable
  05/02/2026 11 PM PDT            9.13             78         0      Not Applicable
  05/03/2026 12 AM PDT            9.13             78         0      Not Applicable
  05/03/2026 01 AM PDT            9.12             76         -      Not Applicable
  05/03/2026 02 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 03 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 04 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 05 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 06 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 07 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 08 AM PDT            9.12             76         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/03/2026 09 AM PDT            9.12             76                Not Applicable
  05/03/2026 10 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 11 AM PDT            9.12             76         0      Not Applicable
  05/03/2026 12 PM PDT            9.12             76         0      Not Applicable
  05/03/2026 01 PM PDT            9.11             75         -      Not Applicable
  05/03/2026 02 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 03 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 04 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 05 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 06 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 07 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 08 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 09 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 10 PM PDT            9.11             75         0      Not Applicable
  05/03/2026 11 PM PDT            9.11             75         0      Not Applicable
  05/04/2026 12 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 01 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 02 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 03 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 04 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 05 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 06 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 07 AM PDT            9.11             75         0      Not Applicable
  05/04/2026 08 AM PDT            9.10             74         -      Not Applicable
  05/04/2026 09 AM PDT            9.10             74         0      Not Applicable
  05/04/2026 10 AM PDT            9.10             74         0      Not Applicable
  05/04/2026 11 AM PDT            9.10             74         0      Not Applicable
  05/04/2026 12 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 01 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 02 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 03 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 04 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 05 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 06 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 07 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 08 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 09 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 10 PM PDT            9.10             74         0      Not Applicable
  05/04/2026 11 PM PDT            9.10             74         0      Not Applicable
  05/05/2026 12 AM PDT            9.10             74         0      Not Applicable
  05/05/2026 01 AM PDT            9.10             74         0      Not Applicable
  05/05/2026 02 AM PDT            9.10             74         0      Not Applicable
  05/05/2026 03 AM PDT            9.10             74         0      Not Applicable
  05/05/2026 04 AM PDT            9.10             74         0      Not Applicable
  05/05/2026 05 AM PDT            9.10             74         0      Not Applicable
  05/05/2026 06 AM PDT            9.09             72         -      Not Applicable
  05/05/2026 07 AM PDT            9.09             72         0      Not Applicable
  05/05/2026 08 AM PDT            9.09             72         0      Not Applicable
  05/05/2026 09 AM PDT            9.09             72         0      Not Applicable
  05/05/2026 10 AM PDT            9.09             72         0      Not Applicable
  05/05/2026 11 AM PDT            9.08             71         -      Not Applicable
  05/05/2026 12 PM PDT            9.08             71         0      Not Applicable
  05/05/2026 01 PM PDT            9.08             71         0      Not Applicable
  05/05/2026 02 PM PDT            9.08             71         0      Not Applicable
  05/05/2026 03 PM PDT            9.08             71         0      Not Applicable
  05/05/2026 04 PM PDT            9.08             71         0      Not Applicable
  05/05/2026 05 PM PDT            9.08             71         0      Not Applicable
  05/05/2026 06 PM PDT            9.07             70         -      Not Applicable
  05/05/2026 07 PM PDT            9.07             70         0      Not Applicable
  05/05/2026 08 PM PDT            9.07             70         0      Not Applicable
  05/05/2026 09 PM PDT            9.07             70         0      Not Applicable
  05/05/2026 10 PM PDT            9.07             70         0      Not Applicable
  05/05/2026 11 PM PDT            9.07             70         0      Not Applicable
  05/06/2026 12 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 01 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 02 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 03 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 04 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 05 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 06 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 07 AM PDT            9.07             70         0      Not Applicable
  05/06/2026 08 AM PDT            9.06             69         -      Not Applicable
  05/06/2026 09 AM PDT            9.06             69         0      Not Applicable
  05/06/2026 10 AM PDT            9.06             69         0      Not Applicable
  05/06/2026 11 AM PDT            9.06             69         0      Not Applicable
  05/06/2026 12 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 01 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 02 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 03 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 04 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 05 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 06 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 07 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 08 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 09 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 10 PM PDT            9.06             69         0      Not Applicable
  05/06/2026 11 PM PDT            9.06             69         0      Not Applicable
  05/07/2026 12 AM PDT            9.06             69         0      Not Applicable
  05/07/2026 01 AM PDT            9.05             68         -      Not Applicable
  05/07/2026 02 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 03 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 04 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 05 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 06 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 07 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 08 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 09 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 10 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 11 AM PDT            9.05             68         0      Not Applicable
  05/07/2026 12 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 01 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 02 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 03 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 04 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 05 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 06 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 07 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 08 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 09 PM PDT            9.04             67         -      Not Applicable
  05/07/2026 10 PM PDT            9.04             67         0      Not Applicable
  05/07/2026 11 PM PDT            9.04             67         0      Not Applicable
  05/08/2026 12 AM PDT            9.04             67         0      Not Applicable
  05/08/2026 01 AM PDT            9.04             67         0      Not Applicable
  05/08/2026 02 AM PDT            9.04             67         0      Not Applicable
  05/08/2026 03 AM PDT            9.04             67         0      Not Applicable
  05/08/2026 04 AM PDT            9.04             67         0      Not Applicable
  05/08/2026 05 AM PDT            9.04             67         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.