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: Mar 28 2026 at 7:51 AM PDTNext Issuance: Mar 29 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:  03/28/2026 at 07:54 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/23/2026 at 06:00 PM PDT
# Maximum Observed Stage:                       9.29 Feet
# Maximum Observed Flow:                        77 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/02/2026 at 12:00 AM PDT
# Maximum Forecast Stage:                       9.29 Feet
# Maximum Forecast Flow:                        77 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/23/2026 07 AM PDT            9.28             75                Not Applicable
  03/23/2026 08 AM PDT            9.28             75         0      Not Applicable
  03/23/2026 09 AM PDT            9.28             75         0      Not Applicable
  03/23/2026 10 AM PDT            9.29             77         +      Not Applicable
  03/23/2026 11 AM PDT            9.29             77         0      Not Applicable
  03/23/2026 12 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 01 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 02 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 03 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 04 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 05 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 06 PM PDT            9.29             77         0      Not Applicable
  03/23/2026 07 PM PDT            9.28             75         -      Not Applicable
  03/23/2026 08 PM PDT            9.28             75         0      Not Applicable
  03/23/2026 09 PM PDT            9.28             75         0      Not Applicable
  03/23/2026 10 PM PDT            9.27             74         -      Not Applicable
  03/23/2026 11 PM PDT            9.28             75         +      Not Applicable
  03/24/2026 12 AM PDT            9.27             74         -      Not Applicable
  03/24/2026 01 AM PDT            9.27             74         0      Not Applicable
  03/24/2026 02 AM PDT            9.27             74         0      Not Applicable
  03/24/2026 03 AM PDT            9.26             73         -      Not Applicable
  03/24/2026 04 AM PDT            9.26             73         0      Not Applicable
  03/24/2026 05 AM PDT            9.26             73         0      Not Applicable
  03/24/2026 06 AM PDT            9.26             73         0      Not Applicable
  03/24/2026 07 AM PDT            9.25             71         -      Not Applicable
  03/24/2026 08 AM PDT            9.26             73         +      Not Applicable
  03/24/2026 09 AM PDT            9.26             73         0      Not Applicable
  03/24/2026 10 AM PDT            9.26             73         0      Not Applicable
  03/24/2026 11 AM PDT            9.26             73         0      Not Applicable
  03/24/2026 12 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 01 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 02 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 03 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 04 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 05 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 06 PM PDT            9.26             73         0      Not Applicable
  03/24/2026 07 PM PDT            9.25             71         -      Not Applicable
  03/24/2026 08 PM PDT            9.25             71         0      Not Applicable
  03/24/2026 09 PM PDT            9.25             71         0      Not Applicable
  03/24/2026 10 PM PDT            9.24             70         -      Not Applicable
  03/24/2026 11 PM PDT            9.24             70         0      Not Applicable
  03/25/2026 12 AM PDT            9.24             70         0      Not Applicable
  03/25/2026 01 AM PDT            9.24             70         0      Not Applicable
  03/25/2026 02 AM PDT            9.24             70         0      Not Applicable
  03/25/2026 03 AM PDT            9.24             70         0      Not Applicable
  03/25/2026 04 AM PDT            9.23             69         -      Not Applicable
  03/25/2026 05 AM PDT            9.23             69         0      Not Applicable
  03/25/2026 06 AM PDT            9.23             69         0      Not Applicable
  03/25/2026 07 AM PDT            9.23             69         0      Not Applicable
  03/25/2026 08 AM PDT            9.23             69         0      Not Applicable
  03/25/2026 09 AM PDT            9.23             69         0      Not Applicable
  03/25/2026 10 AM PDT            9.23             69         0      Not Applicable
  03/25/2026 11 AM PDT            9.24             70         +      Not Applicable
  03/25/2026 12 PM PDT            9.24             70         0      Not Applicable
  03/25/2026 01 PM PDT            9.24             70         0      Not Applicable
  03/25/2026 02 PM PDT            9.24             70         0      Not Applicable
  03/25/2026 03 PM PDT            9.23             69         -      Not Applicable
  03/25/2026 04 PM PDT            9.24             70         +      Not Applicable
  03/25/2026 05 PM PDT            9.23             69         -      Not Applicable
  03/25/2026 06 PM PDT            9.24             70         +      Not Applicable
  03/25/2026 07 PM PDT            9.23             69         -      Not Applicable
  03/25/2026 08 PM PDT            9.23             69         0      Not Applicable
  03/25/2026 09 PM PDT            9.23             69         0      Not Applicable
  03/25/2026 10 PM PDT            9.22             68         -      Not Applicable
  03/25/2026 11 PM PDT            9.22             68         0      Not Applicable
  03/26/2026 12 AM PDT            9.22             68         0      Not Applicable
  03/26/2026 01 AM PDT            9.22             68         0      Not Applicable
  03/26/2026 02 AM PDT            9.21             67         -      Not Applicable
  03/26/2026 03 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 04 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 05 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 06 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 07 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 08 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 09 AM PDT            9.20             66         -      Not Applicable
  03/26/2026 10 AM PDT            9.21             67         +      Not Applicable
  03/26/2026 11 AM PDT            9.21             67         0      Not Applicable
  03/26/2026 12 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 01 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 02 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 03 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 04 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 05 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 06 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 07 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 08 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 09 PM PDT            9.21             67         0      Not Applicable
  03/26/2026 10 PM PDT            9.20             66         -      Not Applicable
  03/26/2026 11 PM PDT            9.20             66         0      Not Applicable
  03/27/2026 12 AM PDT            9.20             66         0      Not Applicable
  03/27/2026 01 AM PDT            9.19             65         -      Not Applicable
  03/27/2026 02 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 03 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 04 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 05 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 06 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 07 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 08 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 09 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 10 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 11 AM PDT            9.19             65         0      Not Applicable
  03/27/2026 12 PM PDT            9.19             65         0      Not Applicable
  03/27/2026 01 PM PDT            9.19             65         0      Not Applicable
  03/27/2026 02 PM PDT            9.19             65         0      Not Applicable
  03/27/2026 03 PM PDT            9.20             66         +      Not Applicable
  03/27/2026 04 PM PDT            9.20             66         0      Not Applicable
  03/27/2026 05 PM PDT            9.19             65         -      Not Applicable
  03/27/2026 06 PM PDT            9.20             66         +      Not Applicable
  03/27/2026 07 PM PDT            9.19             65         -      Not Applicable
  03/27/2026 08 PM PDT            9.19             65         0      Not Applicable
  03/27/2026 09 PM PDT            9.18             64         -      Not Applicable
  03/27/2026 10 PM PDT            9.18             64         0      Not Applicable
  03/27/2026 11 PM PDT            9.18             64         0      Not Applicable
  03/28/2026 12 AM PDT            9.18             64         0      Not Applicable
  03/28/2026 01 AM PDT            9.17             63         -      Not Applicable
  03/28/2026 02 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 03 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 04 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 05 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 06 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 07 AM PDT            9.17             63         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/28/2026 08 AM PDT            9.17             63                Not Applicable
  03/28/2026 09 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 10 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 11 AM PDT            9.17             63         0      Not Applicable
  03/28/2026 12 PM PDT            9.17             63         0      Not Applicable
  03/28/2026 01 PM PDT            9.17             63         0      Not Applicable
  03/28/2026 02 PM PDT            9.17             63         0      Not Applicable
  03/28/2026 03 PM PDT            9.17             63         0      Not Applicable
  03/28/2026 04 PM PDT            9.17             63         0      Not Applicable
  03/28/2026 05 PM PDT            9.17             63         0      Not Applicable
  03/28/2026 06 PM PDT            9.16             61         -      Not Applicable
  03/28/2026 07 PM PDT            9.16             61         0      Not Applicable
  03/28/2026 08 PM PDT            9.16             61         0      Not Applicable
  03/28/2026 09 PM PDT            9.16             61         0      Not Applicable
  03/28/2026 10 PM PDT            9.16             61         0      Not Applicable
  03/28/2026 11 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 12 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 01 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 02 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 03 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 04 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 05 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 06 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 07 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 08 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 09 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 10 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 11 AM PDT            9.16             61         0      Not Applicable
  03/29/2026 12 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 01 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 02 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 03 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 04 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 05 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 06 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 07 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 08 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 09 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 10 PM PDT            9.16             61         0      Not Applicable
  03/29/2026 11 PM PDT            9.16             61         0      Not Applicable
  03/30/2026 12 AM PDT            9.15             60         -      Not Applicable
  03/30/2026 01 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 02 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 03 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 04 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 05 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 06 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 07 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 08 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 09 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 10 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 11 AM PDT            9.15             60         0      Not Applicable
  03/30/2026 12 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 01 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 02 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 03 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 04 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 05 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 06 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 07 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 08 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 09 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 10 PM PDT            9.15             60         0      Not Applicable
  03/30/2026 11 PM PDT            9.15             60         0      Not Applicable
  03/31/2026 12 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 01 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 02 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 03 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 04 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 05 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 06 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 07 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 08 AM PDT            9.15             60         0      Not Applicable
  03/31/2026 09 AM PDT            9.14             59         -      Not Applicable
  03/31/2026 10 AM PDT            9.14             59         0      Not Applicable
  03/31/2026 11 AM PDT            9.14             59         0      Not Applicable
  03/31/2026 12 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 01 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 02 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 03 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 04 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 05 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 06 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 07 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 08 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 09 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 10 PM PDT            9.14             59         0      Not Applicable
  03/31/2026 11 PM PDT            9.14             59         0      Not Applicable
  04/01/2026 12 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 01 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 02 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 03 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 04 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 05 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 06 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 07 AM PDT            9.14             59         0      Not Applicable
  04/01/2026 08 AM PDT            9.15             60         +      Not Applicable
  04/01/2026 09 AM PDT            9.15             60         0      Not Applicable
  04/01/2026 10 AM PDT            9.15             60         0      Not Applicable
  04/01/2026 11 AM PDT            9.16             61         +      Not Applicable
  04/01/2026 12 PM PDT            9.17             63         +      Not Applicable
  04/01/2026 01 PM PDT            9.18             64         +      Not Applicable
  04/01/2026 02 PM PDT            9.19             65         +      Not Applicable
  04/01/2026 03 PM PDT            9.20             66         +      Not Applicable
  04/01/2026 04 PM PDT            9.21             67         +      Not Applicable
  04/01/2026 05 PM PDT            9.22             68         +      Not Applicable
  04/01/2026 06 PM PDT            9.23             69         +      Not Applicable
  04/01/2026 07 PM PDT            9.24             70         +      Not Applicable
  04/01/2026 08 PM PDT            9.26             73         +      Not Applicable
  04/01/2026 09 PM PDT            9.27             74         +      Not Applicable
  04/01/2026 10 PM PDT            9.28             75         +      Not Applicable
  04/01/2026 11 PM PDT            9.28             75         0      Not Applicable
  04/02/2026 12 AM PDT            9.29             77         +      Not Applicable
  04/02/2026 01 AM PDT            9.29             77         0      Not Applicable
  04/02/2026 02 AM PDT            9.29             77         0      Not Applicable
  04/02/2026 03 AM PDT            9.29             77         0      Not Applicable
  04/02/2026 04 AM PDT            9.29             77         0      Not Applicable
  04/02/2026 05 AM PDT            9.28             75         -      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.