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 12 2026 at 7:30 AM PDTNext Issuance: May 13 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:  05/12/2026 at 07:31 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/07/2026 at 04:00 PM PDT
# Maximum Observed Stage:                       9.06 Feet
# Maximum Observed Flow:                        69 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/12/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       8.97 Feet
# Maximum Forecast Flow:                        59 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/07/2026 07 AM PDT            9.05             68                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            9.06             69         +      Not Applicable
  05/07/2026 12 PM PDT            9.06             69         0      Not Applicable
  05/07/2026 01 PM PDT            9.06             69         0      Not Applicable
  05/07/2026 02 PM PDT            9.05             68         -      Not Applicable
  05/07/2026 03 PM PDT            9.05             68         0      Not Applicable
  05/07/2026 04 PM PDT            9.06             69         +      Not Applicable
  05/07/2026 05 PM PDT            9.05             68         -      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            9.04             67         -      Not Applicable
  05/07/2026 09 PM PDT            9.04             67         0      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            9.03             66         -      Not Applicable
  05/08/2026 02 AM PDT            9.04             67         +      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            9.03             66         -      Not Applicable
  05/08/2026 06 AM PDT            9.03             66         0      Not Applicable
  05/08/2026 07 AM PDT            9.04             67         +      Not Applicable
  05/08/2026 08 AM PDT            9.03             66         -      Not Applicable
  05/08/2026 09 AM PDT            9.03             66         0      Not Applicable
  05/08/2026 10 AM PDT            9.04             67         +      Not Applicable
  05/08/2026 11 AM PDT            9.04             67         0      Not Applicable
  05/08/2026 12 PM PDT            9.04             67         0      Not Applicable
  05/08/2026 01 PM PDT            9.04             67         0      Not Applicable
  05/08/2026 02 PM PDT            9.04             67         0      Not Applicable
  05/08/2026 03 PM PDT            9.03             66         -      Not Applicable
  05/08/2026 04 PM PDT            9.04             67         +      Not Applicable
  05/08/2026 05 PM PDT            9.03             66         -      Not Applicable
  05/08/2026 06 PM PDT            9.03             66         0      Not Applicable
  05/08/2026 07 PM PDT            9.03             66         0      Not Applicable
  05/08/2026 08 PM PDT            9.02             64         -      Not Applicable
  05/08/2026 09 PM PDT            9.02             64         0      Not Applicable
  05/08/2026 10 PM PDT            9.02             64         0      Not Applicable
  05/08/2026 11 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 12 AM PDT            9.02             64         0      Not Applicable
  05/09/2026 01 AM PDT            9.02             64         0      Not Applicable
  05/09/2026 02 AM PDT            9.01             63         -      Not Applicable
  05/09/2026 03 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 04 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 05 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 06 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 07 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 08 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 09 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 10 AM PDT            9.01             63         0      Not Applicable
  05/09/2026 11 AM PDT            9.02             64         +      Not Applicable
  05/09/2026 12 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 01 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 02 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 03 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 04 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 05 PM PDT            9.02             64         0      Not Applicable
  05/09/2026 06 PM PDT            9.01             63         -      Not Applicable
  05/09/2026 07 PM PDT            9.01             63         0      Not Applicable
  05/09/2026 08 PM PDT            9.01             63         0      Not Applicable
  05/09/2026 09 PM PDT            9.01             63         0      Not Applicable
  05/09/2026 10 PM PDT            9.00             62         -      Not Applicable
  05/09/2026 11 PM PDT            9.00             62         0      Not Applicable
  05/10/2026 12 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 01 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 02 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 03 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 04 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 05 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 06 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 07 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 08 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 09 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 10 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 11 AM PDT            9.00             62         0      Not Applicable
  05/10/2026 12 PM PDT            9.00             62         0      Not Applicable
  05/10/2026 01 PM PDT            9.00             62         0      Not Applicable
  05/10/2026 02 PM PDT            9.00             62         0      Not Applicable
  05/10/2026 03 PM PDT            9.00             62         0      Not Applicable
  05/10/2026 04 PM PDT            9.00             62         0      Not Applicable
  05/10/2026 05 PM PDT            8.99             61         -      Not Applicable
  05/10/2026 06 PM PDT            8.99             61         0      Not Applicable
  05/10/2026 07 PM PDT            8.99             61         0      Not Applicable
  05/10/2026 08 PM PDT            8.99             61         0      Not Applicable
  05/10/2026 09 PM PDT            8.98             60         -      Not Applicable
  05/10/2026 10 PM PDT            8.99             61         +      Not Applicable
  05/10/2026 11 PM PDT            8.98             60         -      Not Applicable
  05/11/2026 12 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 01 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 02 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 03 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 04 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 05 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 06 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 07 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 08 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 09 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 10 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 11 AM PDT            8.98             60         0      Not Applicable
  05/11/2026 12 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 01 PM PDT            8.99             61         +      Not Applicable
  05/11/2026 02 PM PDT            8.99             61         0      Not Applicable
  05/11/2026 03 PM PDT            8.98             60         -      Not Applicable
  05/11/2026 04 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 05 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 06 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 07 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 08 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 09 PM PDT            8.98             60         0      Not Applicable
  05/11/2026 10 PM PDT            8.97             59         -      Not Applicable
  05/11/2026 11 PM PDT            8.97             59         0      Not Applicable
  05/12/2026 12 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 01 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 02 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 03 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 04 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 05 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 06 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 07 AM PDT            8.97             59         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/12/2026 08 AM PDT            8.97             59                Not Applicable
  05/12/2026 09 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 10 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 11 AM PDT            8.97             59         0      Not Applicable
  05/12/2026 12 PM PDT            8.97             59         0      Not Applicable
  05/12/2026 01 PM PDT            8.97             59         0      Not Applicable
  05/12/2026 02 PM PDT            8.97             59         0      Not Applicable
  05/12/2026 03 PM PDT            8.97             59         0      Not Applicable
  05/12/2026 04 PM PDT            8.97             59         0      Not Applicable
  05/12/2026 05 PM PDT            8.96             58         -      Not Applicable
  05/12/2026 06 PM PDT            8.96             58         0      Not Applicable
  05/12/2026 07 PM PDT            8.96             58         0      Not Applicable
  05/12/2026 08 PM PDT            8.96             58         0      Not Applicable
  05/12/2026 09 PM PDT            8.96             58         0      Not Applicable
  05/12/2026 10 PM PDT            8.96             58         0      Not Applicable
  05/12/2026 11 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 12 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 01 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 02 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 03 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 04 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 05 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 06 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 07 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 08 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 09 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 10 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 11 AM PDT            8.96             58         0      Not Applicable
  05/13/2026 12 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 01 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 02 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 03 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 04 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 05 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 06 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 07 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 08 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 09 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 10 PM PDT            8.96             58         0      Not Applicable
  05/13/2026 11 PM PDT            8.95             57         -      Not Applicable
  05/14/2026 12 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 01 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 02 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 03 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 04 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 05 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 06 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 07 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 08 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 09 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 10 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 11 AM PDT            8.95             57         0      Not Applicable
  05/14/2026 12 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 01 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 02 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 03 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 04 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 05 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 06 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 07 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 08 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 09 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 10 PM PDT            8.95             57         0      Not Applicable
  05/14/2026 11 PM PDT            8.95             57         0      Not Applicable
  05/15/2026 12 AM PDT            8.95             57         0      Not Applicable
  05/15/2026 01 AM PDT            8.95             57         0      Not Applicable
  05/15/2026 02 AM PDT            8.95             57         0      Not Applicable
  05/15/2026 03 AM PDT            8.95             57         0      Not Applicable
  05/15/2026 04 AM PDT            8.94             56         -      Not Applicable
  05/15/2026 05 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 06 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 07 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 08 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 09 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 10 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 11 AM PDT            8.94             56         0      Not Applicable
  05/15/2026 12 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 01 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 02 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 03 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 04 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 05 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 06 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 07 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 08 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 09 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 10 PM PDT            8.94             56         0      Not Applicable
  05/15/2026 11 PM PDT            8.94             56         0      Not Applicable
  05/16/2026 12 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 01 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 02 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 03 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 04 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 05 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 06 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 07 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 08 AM PDT            8.94             56         0      Not Applicable
  05/16/2026 09 AM PDT            8.93             55         -      Not Applicable
  05/16/2026 10 AM PDT            8.93             55         0      Not Applicable
  05/16/2026 11 AM PDT            8.93             55         0      Not Applicable
  05/16/2026 12 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 01 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 02 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 03 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 04 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 05 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 06 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 07 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 08 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 09 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 10 PM PDT            8.93             55         0      Not Applicable
  05/16/2026 11 PM PDT            8.93             55         0      Not Applicable
  05/17/2026 12 AM PDT            8.93             55         0      Not Applicable
  05/17/2026 01 AM PDT            8.93             55         0      Not Applicable
  05/17/2026 02 AM PDT            8.93             55         0      Not Applicable
  05/17/2026 03 AM PDT            8.93             55         0      Not Applicable
  05/17/2026 04 AM PDT            8.93             55         0      Not Applicable
  05/17/2026 05 AM PDT            8.93             55         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.