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: Jul 19 2025 at 7:48 AM PDTNext Issuance: Jul 20 2025 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:  07/19/2025 at 07:52 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/14/2025 at 11:00 AM PDT
# Maximum Observed Stage:                       8.70 Feet
# Maximum Observed Flow:                        14 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/19/2025 at 08:00 AM PDT
# Maximum Forecast Stage:                       8.68 Feet
# Maximum Forecast Flow:                        13 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/14/2025 07 AM PDT            8.70             14                Not Applicable
  07/14/2025 08 AM PDT            8.70             14         0      Not Applicable
  07/14/2025 09 AM PDT            8.70             14         0      Not Applicable
  07/14/2025 10 AM PDT            8.70             14         0      Not Applicable
  07/14/2025 11 AM PDT            8.70             14         0      Not Applicable
  07/14/2025 12 PM PDT            8.69             13         -      Not Applicable
  07/14/2025 01 PM PDT            8.69             13         0      Not Applicable
  07/14/2025 02 PM PDT            8.69             13         0      Not Applicable
  07/14/2025 03 PM PDT            8.68             13         -      Not Applicable
  07/14/2025 04 PM PDT            8.69             13         +      Not Applicable
  07/14/2025 05 PM PDT            8.68             13         -      Not Applicable
  07/14/2025 06 PM PDT            8.68             13         0      Not Applicable
  07/14/2025 07 PM PDT            8.69             13         +      Not Applicable
  07/14/2025 08 PM PDT            8.69             13         0      Not Applicable
  07/14/2025 09 PM PDT            8.69             13         0      Not Applicable
  07/14/2025 10 PM PDT            8.69             13         0      Not Applicable
  07/14/2025 11 PM PDT            8.69             13         0      Not Applicable
  07/15/2025 12 AM PDT            8.69             13         0      Not Applicable
  07/15/2025 01 AM PDT            8.69             13         0      Not Applicable
  07/15/2025 02 AM PDT            8.68             13         -      Not Applicable
  07/15/2025 03 AM PDT            8.68             13         0      Not Applicable
  07/15/2025 04 AM PDT            8.68             13         0      Not Applicable
  07/15/2025 05 AM PDT            8.68             13         0      Not Applicable
  07/15/2025 06 AM PDT            8.68             13         0      Not Applicable
  07/15/2025 07 AM PDT            8.68             13         0      Not Applicable
  07/15/2025 08 AM PDT            8.69             13         +      Not Applicable
  07/15/2025 09 AM PDT            8.69             13         0      Not Applicable
  07/15/2025 10 AM PDT            8.69             13         0      Not Applicable
  07/15/2025 11 AM PDT            8.69             13         0      Not Applicable
  07/15/2025 12 PM PDT            8.69             13         0      Not Applicable
  07/15/2025 01 PM PDT            8.66             12         -      Not Applicable
  07/15/2025 02 PM PDT            8.68             13         +      Not Applicable
  07/15/2025 03 PM PDT            8.63             10         -      Not Applicable
  07/15/2025 04 PM PDT            8.66             12         +      Not Applicable
  07/15/2025 05 PM PDT            8.67             12         +      Not Applicable
  07/15/2025 06 PM PDT            8.68             13         +      Not Applicable
  07/15/2025 07 PM PDT            8.68             13         0      Not Applicable
  07/15/2025 08 PM PDT            8.68             13         0      Not Applicable
  07/15/2025 09 PM PDT            8.68             13         0      Not Applicable
  07/15/2025 10 PM PDT            8.68             13         0      Not Applicable
  07/15/2025 11 PM PDT            8.68             13         0      Not Applicable
  07/16/2025 12 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 01 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 02 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 03 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 04 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 05 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 06 AM PDT            8.68             13         0      Not Applicable
  07/16/2025 07 AM PDT            8.69             13         +      Not Applicable
  07/16/2025 08 AM PDT            8.69             13         0      Not Applicable
  07/16/2025 09 AM PDT            8.69             13         0      Not Applicable
  07/16/2025 10 AM PDT            8.69             13         0      Not Applicable
  07/16/2025 11 AM PDT            8.69             13         0      Not Applicable
  07/16/2025 12 PM PDT            8.68             13         -      Not Applicable
  07/16/2025 01 PM PDT            8.66             12         -      Not Applicable
  07/16/2025 02 PM PDT            8.69             13         +      Not Applicable
  07/16/2025 03 PM PDT            8.69             13         0      Not Applicable
  07/16/2025 04 PM PDT            8.69             13         0      Not Applicable
  07/16/2025 05 PM PDT            8.68             13         -      Not Applicable
  07/16/2025 06 PM PDT            8.68             13         0      Not Applicable
  07/16/2025 07 PM PDT            8.68             13         0      Not Applicable
  07/16/2025 08 PM PDT            8.68             13         0      Not Applicable
  07/16/2025 09 PM PDT            8.69             13         +      Not Applicable
  07/16/2025 10 PM PDT            8.69             13         0      Not Applicable
  07/16/2025 11 PM PDT            8.69             13         0      Not Applicable
  07/17/2025 12 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 01 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 02 AM PDT            8.68             13         -      Not Applicable
  07/17/2025 03 AM PDT            8.68             13         0      Not Applicable
  07/17/2025 04 AM PDT            8.68             13         0      Not Applicable
  07/17/2025 05 AM PDT            8.69             13         +      Not Applicable
  07/17/2025 06 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 07 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 08 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 09 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 10 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 11 AM PDT            8.69             13         0      Not Applicable
  07/17/2025 12 PM PDT            8.69             13         0      Not Applicable
  07/17/2025 01 PM PDT            8.69             13         0      Not Applicable
  07/17/2025 02 PM PDT            8.69             13         0      Not Applicable
  07/17/2025 03 PM PDT            8.66             12         -      Not Applicable
  07/17/2025 04 PM PDT            8.69             13         +      Not Applicable
  07/17/2025 05 PM PDT            8.64             11         -      Not Applicable
  07/17/2025 06 PM PDT            8.66             12         +      Not Applicable
  07/17/2025 07 PM PDT            8.67             12         +      Not Applicable
  07/17/2025 08 PM PDT            8.67             12         0      Not Applicable
  07/17/2025 09 PM PDT            8.68             13         +      Not Applicable
  07/17/2025 10 PM PDT            8.68             13         0      Not Applicable
  07/17/2025 11 PM PDT            8.69             13         +      Not Applicable
  07/18/2025 12 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 01 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 02 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 03 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 04 AM PDT            8.68             13         -      Not Applicable
  07/18/2025 05 AM PDT            8.69             13         +      Not Applicable
  07/18/2025 06 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 07 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 08 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 09 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 10 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 11 AM PDT            8.69             13         0      Not Applicable
  07/18/2025 12 PM PDT            8.69             13         0      Not Applicable
  07/18/2025 01 PM PDT            8.69             13         0      Not Applicable
  07/18/2025 02 PM PDT            8.69             13         0      Not Applicable
  07/18/2025 03 PM PDT            8.69             13         0      Not Applicable
  07/18/2025 04 PM PDT            8.69             13         0      Not Applicable
  07/18/2025 05 PM PDT            8.63             10         -      Not Applicable
  07/18/2025 06 PM PDT            8.68             13         +      Not Applicable
  07/18/2025 07 PM PDT            8.68             13         0      Not Applicable
  07/18/2025 08 PM PDT            8.68             13         0      Not Applicable
  07/18/2025 09 PM PDT            8.68             13         0      Not Applicable
  07/18/2025 10 PM PDT            8.68             13         0      Not Applicable
  07/18/2025 11 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 12 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 01 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 02 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 03 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 04 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 05 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 06 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 07 AM PDT            8.68             13         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/19/2025 08 AM PDT            8.68             13                Not Applicable
  07/19/2025 09 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 10 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 11 AM PDT            8.68             13         0      Not Applicable
  07/19/2025 12 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 01 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 02 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 03 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 04 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 05 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 06 PM PDT            8.68             13         0      Not Applicable
  07/19/2025 07 PM PDT            8.67             12         -      Not Applicable
  07/19/2025 08 PM PDT            8.67             12         0      Not Applicable
  07/19/2025 09 PM PDT            8.67             12         0      Not Applicable
  07/19/2025 10 PM PDT            8.67             12         0      Not Applicable
  07/19/2025 11 PM PDT            8.67             12         0      Not Applicable
  07/20/2025 12 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 01 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 02 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 03 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 04 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 05 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 06 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 07 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 08 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 09 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 10 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 11 AM PDT            8.67             12         0      Not Applicable
  07/20/2025 12 PM PDT            8.67             12         0      Not Applicable
  07/20/2025 01 PM PDT            8.67             12         0      Not Applicable
  07/20/2025 02 PM PDT            8.67             12         0      Not Applicable
  07/20/2025 03 PM PDT            8.67             12         0      Not Applicable
  07/20/2025 04 PM PDT            8.66             12         -      Not Applicable
  07/20/2025 05 PM PDT            8.66             12         0      Not Applicable
  07/20/2025 06 PM PDT            8.66             12         0      Not Applicable
  07/20/2025 07 PM PDT            8.66             12         0      Not Applicable
  07/20/2025 08 PM PDT            8.66             12         0      Not Applicable
  07/20/2025 09 PM PDT            8.66             12         0      Not Applicable
  07/20/2025 10 PM PDT            8.66             12         0      Not Applicable
  07/20/2025 11 PM PDT            8.66             12         0      Not Applicable
  07/21/2025 12 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 01 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 02 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 03 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 04 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 05 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 06 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 07 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 08 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 09 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 10 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 11 AM PDT            8.66             12         0      Not Applicable
  07/21/2025 12 PM PDT            8.66             12         0      Not Applicable
  07/21/2025 01 PM PDT            8.66             12         0      Not Applicable
  07/21/2025 02 PM PDT            8.66             12         0      Not Applicable
  07/21/2025 03 PM PDT            8.65             11         -      Not Applicable
  07/21/2025 04 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 05 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 06 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 07 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 08 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 09 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 10 PM PDT            8.65             11         0      Not Applicable
  07/21/2025 11 PM PDT            8.65             11         0      Not Applicable
  07/22/2025 12 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 01 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 02 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 03 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 04 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 05 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 06 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 07 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 08 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 09 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 10 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 11 AM PDT            8.65             11         0      Not Applicable
  07/22/2025 12 PM PDT            8.65             11         0      Not Applicable
  07/22/2025 01 PM PDT            8.65             11         0      Not Applicable
  07/22/2025 02 PM PDT            8.64             11         -      Not Applicable
  07/22/2025 03 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 04 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 05 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 06 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 07 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 08 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 09 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 10 PM PDT            8.64             11         0      Not Applicable
  07/22/2025 11 PM PDT            8.64             11         0      Not Applicable
  07/23/2025 12 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 01 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 02 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 03 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 04 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 05 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 06 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 07 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 08 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 09 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 10 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 11 AM PDT            8.64             11         0      Not Applicable
  07/23/2025 12 PM PDT            8.64             11         0      Not Applicable
  07/23/2025 01 PM PDT            8.63             10         -      Not Applicable
  07/23/2025 02 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 03 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 04 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 05 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 06 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 07 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 08 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 09 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 10 PM PDT            8.63             10         0      Not Applicable
  07/23/2025 11 PM PDT            8.63             10         0      Not Applicable
  07/24/2025 12 AM PDT            8.63             10         0      Not Applicable
  07/24/2025 01 AM PDT            8.63             10         0      Not Applicable
  07/24/2025 02 AM PDT            8.63             10         0      Not Applicable
  07/24/2025 03 AM PDT            8.63             10         0      Not Applicable
  07/24/2025 04 AM PDT            8.63             10         0      Not Applicable
  07/24/2025 05 AM PDT            8.63             10         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.