MATTOLE RIVER - ETTERSBURG (ETTC1)
Latitude: 40.14º NLongitude: 123.99º WElevation: 579 Feet
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Feb 06 2026 at 6:54 AM PSTNext Issuance: Feb 06 2026 at 3:00 PM PST
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:  02/06/2026 at 06:56 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  02/01/2026 at 03:00 PM PST
# Maximum Observed Stage:                       9.67 Feet
# Maximum Observed Flow:                        80 cfs
#
# Earliest Date & Time of Maximum Forecast:     02/09/2026 at 07:00 AM PST
# Maximum Forecast Stage:                       9.83 Feet
# Maximum Forecast Flow:                        105 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  02/01/2026 06 AM PST            9.67             80                Not Applicable
  02/01/2026 07 AM PST            9.67             80         0      Not Applicable
  02/01/2026 08 AM PST            9.67             80         0      Not Applicable
  02/01/2026 09 AM PST            9.67             80         0      Not Applicable
  02/01/2026 10 AM PST            9.67             80         0      Not Applicable
  02/01/2026 11 AM PST            9.67             80         0      Not Applicable
  02/01/2026 12 PM PST            9.66             79         -      Not Applicable
  02/01/2026 01 PM PST            9.67             80         +      Not Applicable
  02/01/2026 02 PM PST            9.67             80         0      Not Applicable
  02/01/2026 03 PM PST            9.67             80         0      Not Applicable
  02/01/2026 04 PM PST            9.66             79         -      Not Applicable
  02/01/2026 05 PM PST            9.66             79         0      Not Applicable
  02/01/2026 06 PM PST            9.66             79         0      Not Applicable
  02/01/2026 07 PM PST            9.66             79         0      Not Applicable
  02/01/2026 08 PM PST            9.66             79         0      Not Applicable
  02/01/2026 09 PM PST            9.65             78         -      Not Applicable
  02/01/2026 10 PM PST            9.65             78         0      Not Applicable
  02/01/2026 11 PM PST            9.65             78         0      Not Applicable
  02/02/2026 12 AM PST            9.65             78         0      Not Applicable
  02/02/2026 01 AM PST            9.64             76         -      Not Applicable
  02/02/2026 02 AM PST            9.64             76         0      Not Applicable
  02/02/2026 03 AM PST            9.64             76         0      Not Applicable
  02/02/2026 04 AM PST            9.64             76         0      Not Applicable
  02/02/2026 05 AM PST            9.64             76         0      Not Applicable
  02/02/2026 06 AM PST            9.63             75         -      Not Applicable
  02/02/2026 07 AM PST            9.63             75         0      Not Applicable
  02/02/2026 08 AM PST            9.63             75         0      Not Applicable
  02/02/2026 09 AM PST            9.63             75         0      Not Applicable
  02/02/2026 10 AM PST            9.63             75         0      Not Applicable
  02/02/2026 11 AM PST            9.63             75         0      Not Applicable
  02/02/2026 12 PM PST            9.63             75         0      Not Applicable
  02/02/2026 01 PM PST            9.63             75         0      Not Applicable
  02/02/2026 02 PM PST            9.63             75         0      Not Applicable
  02/02/2026 03 PM PST            9.63             75         0      Not Applicable
  02/02/2026 04 PM PST            9.62             74         -      Not Applicable
  02/02/2026 05 PM PST            9.63             75         +      Not Applicable
  02/02/2026 06 PM PST            9.62             74         -      Not Applicable
  02/02/2026 07 PM PST            9.62             74         0      Not Applicable
  02/02/2026 08 PM PST            9.62             74         0      Not Applicable
  02/02/2026 09 PM PST            9.62             74         0      Not Applicable
  02/02/2026 10 PM PST            9.61             72         -      Not Applicable
  02/02/2026 11 PM PST            9.61             72         0      Not Applicable
  02/03/2026 12 AM PST            9.61             72         0      Not Applicable
  02/03/2026 01 AM PST            9.61             72         0      Not Applicable
  02/03/2026 02 AM PST            9.61             72         0      Not Applicable
  02/03/2026 03 AM PST            9.61             72         0      Not Applicable
  02/03/2026 04 AM PST            9.60             71         -      Not Applicable
  02/03/2026 05 AM PST            9.60             71         0      Not Applicable
  02/03/2026 06 AM PST            9.60             71         0      Not Applicable
  02/03/2026 07 AM PST            9.60             71         0      Not Applicable
  02/03/2026 08 AM PST            9.59             70         -      Not Applicable
  02/03/2026 09 AM PST            9.59             70         0      Not Applicable
  02/03/2026 10 AM PST            9.59             70         0      Not Applicable
  02/03/2026 11 AM PST            9.59             70         0      Not Applicable
  02/03/2026 12 PM PST            9.59             70         0      Not Applicable
  02/03/2026 01 PM PST            9.59             70         0      Not Applicable
  02/03/2026 02 PM PST            9.59             70         0      Not Applicable
  02/03/2026 03 PM PST            9.59             70         0      Not Applicable
  02/03/2026 04 PM PST            9.59             70         0      Not Applicable
  02/03/2026 05 PM PST            9.59             70         0      Not Applicable
  02/03/2026 06 PM PST            9.58             69         -      Not Applicable
  02/03/2026 07 PM PST            9.58             69         0      Not Applicable
  02/03/2026 08 PM PST            9.58             69         0      Not Applicable
  02/03/2026 09 PM PST            9.58             69         0      Not Applicable
  02/03/2026 10 PM PST            9.58             69         0      Not Applicable
  02/03/2026 11 PM PST            9.58             69         0      Not Applicable
  02/04/2026 12 AM PST            9.57             68         -      Not Applicable
  02/04/2026 01 AM PST            9.57             68         0      Not Applicable
  02/04/2026 02 AM PST            9.57             68         0      Not Applicable
  02/04/2026 03 AM PST            9.57             68         0      Not Applicable
  02/04/2026 04 AM PST            9.56             67         -      Not Applicable
  02/04/2026 05 AM PST            9.56             67         0      Not Applicable
  02/04/2026 06 AM PST            9.57             68         +      Not Applicable
  02/04/2026 07 AM PST            9.56             67         -      Not Applicable
  02/04/2026 08 AM PST            9.56             67         0      Not Applicable
  02/04/2026 09 AM PST            9.56             67         0      Not Applicable
  02/04/2026 10 AM PST            9.56             67         0      Not Applicable
  02/04/2026 11 AM PST            9.56             67         0      Not Applicable
  02/04/2026 12 PM PST            9.56             67         0      Not Applicable
  02/04/2026 01 PM PST            9.56             67         0      Not Applicable
  02/04/2026 02 PM PST            9.56             67         0      Not Applicable
  02/04/2026 03 PM PST            9.56             67         0      Not Applicable
  02/04/2026 04 PM PST            9.56             67         0      Not Applicable
  02/04/2026 05 PM PST            9.56             67         0      Not Applicable
  02/04/2026 06 PM PST            9.56             67         0      Not Applicable
  02/04/2026 07 PM PST            9.55             66         -      Not Applicable
  02/04/2026 08 PM PST            9.55             66         0      Not Applicable
  02/04/2026 09 PM PST            9.55             66         0      Not Applicable
  02/04/2026 10 PM PST            9.55             66         0      Not Applicable
  02/04/2026 11 PM PST            9.55             66         0      Not Applicable
  02/05/2026 12 AM PST            9.55             66         0      Not Applicable
  02/05/2026 01 AM PST            9.54             64         -      Not Applicable
  02/05/2026 02 AM PST            9.54             64         0      Not Applicable
  02/05/2026 03 AM PST            9.54             64         0      Not Applicable
  02/05/2026 04 AM PST            9.54             64         0      Not Applicable
  02/05/2026 05 AM PST            9.54             64         0      Not Applicable
  02/05/2026 06 AM PST            9.53             63         -      Not Applicable
  02/05/2026 07 AM PST            9.53             63         0      Not Applicable
  02/05/2026 08 AM PST            9.53             63         0      Not Applicable
  02/05/2026 09 AM PST            9.53             63         0      Not Applicable
  02/05/2026 10 AM PST            9.53             63         0      Not Applicable
  02/05/2026 11 AM PST            9.54             64         +      Not Applicable
  02/05/2026 12 PM PST            9.54             64         0      Not Applicable
  02/05/2026 01 PM PST            9.53             63         -      Not Applicable
  02/05/2026 02 PM PST            9.54             64         +      Not Applicable
  02/05/2026 03 PM PST            9.53             63         -      Not Applicable
  02/05/2026 04 PM PST            9.53             63         0      Not Applicable
  02/05/2026 05 PM PST            9.54             64         +      Not Applicable
  02/05/2026 06 PM PST            9.53             63         -      Not Applicable
  02/05/2026 07 PM PST            9.53             63         0      Not Applicable
  02/05/2026 08 PM PST            9.52             62         -      Not Applicable
  02/05/2026 09 PM PST            9.52             62         0      Not Applicable
  02/05/2026 10 PM PST            9.52             62         0      Not Applicable
  02/05/2026 11 PM PST            9.52             62         0      Not Applicable
  02/06/2026 12 AM PST            9.52             62         0      Not Applicable
  02/06/2026 01 AM PST            9.52             62         0      Not Applicable
  02/06/2026 02 AM PST            9.51             61         -      Not Applicable
  02/06/2026 03 AM PST            9.51             61         0      Not Applicable
  02/06/2026 04 AM PST            9.51             61         0      Not Applicable
  02/06/2026 05 AM PST            9.51             61         0      Not Applicable
  02/06/2026 06 AM PST            9.51             61         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  02/06/2026 07 AM PST            9.51             61                Not Applicable
  02/06/2026 08 AM PST            9.51             61         0      Not Applicable
  02/06/2026 09 AM PST            9.51             61         0      Not Applicable
  02/06/2026 10 AM PST            9.51             61         0      Not Applicable
  02/06/2026 11 AM PST            9.51             61         0      Not Applicable
  02/06/2026 12 PM PST            9.51             61         0      Not Applicable
  02/06/2026 01 PM PST            9.51             61         0      Not Applicable
  02/06/2026 02 PM PST            9.51             61         0      Not Applicable
  02/06/2026 03 PM PST            9.50             60         -      Not Applicable
  02/06/2026 04 PM PST            9.50             60         0      Not Applicable
  02/06/2026 05 PM PST            9.50             60         0      Not Applicable
  02/06/2026 06 PM PST            9.50             60         0      Not Applicable
  02/06/2026 07 PM PST            9.50             60         0      Not Applicable
  02/06/2026 08 PM PST            9.50             60         0      Not Applicable
  02/06/2026 09 PM PST            9.50             60         0      Not Applicable
  02/06/2026 10 PM PST            9.50             60         0      Not Applicable
  02/06/2026 11 PM PST            9.50             60         0      Not Applicable
  02/07/2026 12 AM PST            9.50             60         0      Not Applicable
  02/07/2026 01 AM PST            9.50             60         0      Not Applicable
  02/07/2026 02 AM PST            9.50             60         0      Not Applicable
  02/07/2026 03 AM PST            9.50             60         0      Not Applicable
  02/07/2026 04 AM PST            9.50             60         0      Not Applicable
  02/07/2026 05 AM PST            9.49             59         -      Not Applicable
  02/07/2026 06 AM PST            9.49             59         0      Not Applicable
  02/07/2026 07 AM PST            9.49             59         0      Not Applicable
  02/07/2026 08 AM PST            9.49             59         0      Not Applicable
  02/07/2026 09 AM PST            9.49             59         0      Not Applicable
  02/07/2026 10 AM PST            9.49             59         0      Not Applicable
  02/07/2026 11 AM PST            9.49             59         0      Not Applicable
  02/07/2026 12 PM PST            9.49             59         0      Not Applicable
  02/07/2026 01 PM PST            9.49             59         0      Not Applicable
  02/07/2026 02 PM PST            9.49             59         0      Not Applicable
  02/07/2026 03 PM PST            9.49             59         0      Not Applicable
  02/07/2026 04 PM PST            9.49             59         0      Not Applicable
  02/07/2026 05 PM PST            9.49             59         0      Not Applicable
  02/07/2026 06 PM PST            9.49             59         0      Not Applicable
  02/07/2026 07 PM PST            9.49             59         0      Not Applicable
  02/07/2026 08 PM PST            9.49             59         0      Not Applicable
  02/07/2026 09 PM PST            9.49             59         0      Not Applicable
  02/07/2026 10 PM PST            9.48             58         -      Not Applicable
  02/07/2026 11 PM PST            9.48             58         0      Not Applicable
  02/08/2026 12 AM PST            9.48             58         0      Not Applicable
  02/08/2026 01 AM PST            9.48             58         0      Not Applicable
  02/08/2026 02 AM PST            9.48             58         0      Not Applicable
  02/08/2026 03 AM PST            9.48             58         0      Not Applicable
  02/08/2026 04 AM PST            9.48             58         0      Not Applicable
  02/08/2026 05 AM PST            9.48             58         0      Not Applicable
  02/08/2026 06 AM PST            9.48             58         0      Not Applicable
  02/08/2026 07 AM PST            9.48             58         0      Not Applicable
  02/08/2026 08 AM PST            9.48             58         0      Not Applicable
  02/08/2026 09 AM PST            9.48             58         0      Not Applicable
  02/08/2026 10 AM PST            9.48             58         0      Not Applicable
  02/08/2026 11 AM PST            9.49             59         +      Not Applicable
  02/08/2026 12 PM PST            9.49             59         0      Not Applicable
  02/08/2026 01 PM PST            9.49             59         0      Not Applicable
  02/08/2026 02 PM PST            9.50             60         +      Not Applicable
  02/08/2026 03 PM PST            9.51             61         +      Not Applicable
  02/08/2026 04 PM PST            9.52             62         +      Not Applicable
  02/08/2026 05 PM PST            9.53             63         +      Not Applicable
  02/08/2026 06 PM PST            9.54             64         +      Not Applicable
  02/08/2026 07 PM PST            9.56             67         +      Not Applicable
  02/08/2026 08 PM PST            9.58             69         +      Not Applicable
  02/08/2026 09 PM PST            9.59             70         +      Not Applicable
  02/08/2026 10 PM PST            9.60             71         +      Not Applicable
  02/08/2026 11 PM PST            9.61             72         +      Not Applicable
  02/09/2026 12 AM PST            9.62             74         +      Not Applicable
  02/09/2026 01 AM PST            9.63             75         +      Not Applicable
  02/09/2026 02 AM PST            9.67             80         +      Not Applicable
  02/09/2026 03 AM PST            9.71             86         +      Not Applicable
  02/09/2026 04 AM PST            9.77             95         +      Not Applicable
  02/09/2026 05 AM PST            9.80            100         +      Not Applicable
  02/09/2026 06 AM PST            9.82            103         +      Not Applicable
  02/09/2026 07 AM PST            9.83            105         +      Not Applicable
  02/09/2026 08 AM PST            9.83            105         0      Not Applicable
  02/09/2026 09 AM PST            9.82            103         -      Not Applicable
  02/09/2026 10 AM PST            9.81            101         -      Not Applicable
  02/09/2026 11 AM PST            9.79             98         -      Not Applicable
  02/09/2026 12 PM PST            9.77             95         -      Not Applicable
  02/09/2026 01 PM PST            9.75             92         -      Not Applicable
  02/09/2026 02 PM PST            9.73             89         -      Not Applicable
  02/09/2026 03 PM PST            9.71             86         -      Not Applicable
  02/09/2026 04 PM PST            9.69             83         -      Not Applicable
  02/09/2026 05 PM PST            9.67             80         -      Not Applicable
  02/09/2026 06 PM PST            9.65             78         -      Not Applicable
  02/09/2026 07 PM PST            9.63             75         -      Not Applicable
  02/09/2026 08 PM PST            9.62             74         -      Not Applicable
  02/09/2026 09 PM PST            9.60             71         -      Not Applicable
  02/09/2026 10 PM PST            9.59             70         -      Not Applicable
  02/09/2026 11 PM PST            9.58             69         -      Not Applicable
  02/10/2026 12 AM PST            9.57             68         -      Not Applicable
  02/10/2026 01 AM PST            9.57             68         0      Not Applicable
  02/10/2026 02 AM PST            9.56             67         -      Not Applicable
  02/10/2026 03 AM PST            9.55             66         -      Not Applicable
  02/10/2026 04 AM PST            9.55             66         0      Not Applicable
  02/10/2026 05 AM PST            9.54             64         -      Not Applicable
  02/10/2026 06 AM PST            9.54             64         0      Not Applicable
  02/10/2026 07 AM PST            9.54             64         0      Not Applicable
  02/10/2026 08 AM PST            9.54             64         0      Not Applicable
  02/10/2026 09 AM PST            9.53             63         -      Not Applicable
  02/10/2026 10 AM PST            9.53             63         0      Not Applicable
  02/10/2026 11 AM PST            9.53             63         0      Not Applicable
  02/10/2026 12 PM PST            9.53             63         0      Not Applicable
  02/10/2026 01 PM PST            9.53             63         0      Not Applicable
  02/10/2026 02 PM PST            9.53             63         0      Not Applicable
  02/10/2026 03 PM PST            9.53             63         0      Not Applicable
  02/10/2026 04 PM PST            9.53             63         0      Not Applicable
  02/10/2026 05 PM PST            9.53             63         0      Not Applicable
  02/10/2026 06 PM PST            9.53             63         0      Not Applicable
  02/10/2026 07 PM PST            9.53             63         0      Not Applicable
  02/10/2026 08 PM PST            9.53             63         0      Not Applicable
  02/10/2026 09 PM PST            9.53             63         0      Not Applicable
  02/10/2026 10 PM PST            9.53             63         0      Not Applicable
  02/10/2026 11 PM PST            9.54             64         +      Not Applicable
  02/11/2026 12 AM PST            9.55             66         +      Not Applicable
  02/11/2026 01 AM PST            9.56             67         +      Not Applicable
  02/11/2026 02 AM PST            9.59             70         +      Not Applicable
  02/11/2026 03 AM PST            9.61             72         +      Not Applicable
  02/11/2026 04 AM PST            9.65             78         +      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.