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 10 2025 at 7:41 AM PDTNext Issuance: Jul 11 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:  07/10/2025 at 07:44 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/06/2025 at 11:00 AM PDT
# Maximum Observed Stage:                       8.81 Feet
# Maximum Observed Flow:                        20 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/10/2025 at 08:00 AM PDT
# Maximum Forecast Stage:                       8.77 Feet
# Maximum Forecast Flow:                        17 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/05/2025 07 AM PDT            8.80             19                Not Applicable
  07/05/2025 08 AM PDT            8.81             20         +      Not Applicable
  07/05/2025 09 AM PDT            8.81             20         0      Not Applicable
  07/05/2025 10 AM PDT            8.81             20         0      Not Applicable
  07/05/2025 11 AM PDT            8.81             20         0      Not Applicable
  07/05/2025 12 PM PDT            8.81             20         0      Not Applicable
  07/05/2025 01 PM PDT            8.81             20         0      Not Applicable
  07/05/2025 02 PM PDT            8.81             20         0      Not Applicable
  07/05/2025 03 PM PDT            8.80             19         -      Not Applicable
  07/05/2025 04 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 05 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 06 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 07 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 08 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 09 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 10 PM PDT            8.80             19         0      Not Applicable
  07/05/2025 11 PM PDT            8.80             19         0      Not Applicable
  07/06/2025 12 AM PDT            8.80             19         0      Not Applicable
  07/06/2025 01 AM PDT            8.79             19         -      Not Applicable
  07/06/2025 02 AM PDT            8.79             19         0      Not Applicable
  07/06/2025 03 AM PDT            8.79             19         0      Not Applicable
  07/06/2025 04 AM PDT            8.79             19         0      Not Applicable
  07/06/2025 05 AM PDT            8.80             19         +      Not Applicable
  07/06/2025 06 AM PDT            8.80             19         0      Not Applicable
  07/06/2025 07 AM PDT            8.80             19         0      Not Applicable
  07/06/2025 08 AM PDT            8.80             19         0      Not Applicable
  07/06/2025 09 AM PDT            8.81             20         +      Not Applicable
  07/06/2025 10 AM PDT            8.80             19         -      Not Applicable
  07/06/2025 11 AM PDT            8.81             20         +      Not Applicable
  07/06/2025 12 PM PDT            8.80             19         -      Not Applicable
  07/06/2025 01 PM PDT            8.80             19         0      Not Applicable
  07/06/2025 02 PM PDT            8.80             19         0      Not Applicable
  07/06/2025 03 PM PDT            8.79             19         -      Not Applicable
  07/06/2025 04 PM PDT            8.79             19         0      Not Applicable
  07/06/2025 05 PM PDT            8.79             19         0      Not Applicable
  07/06/2025 06 PM PDT            8.79             19         0      Not Applicable
  07/06/2025 07 PM PDT            8.79             19         0      Not Applicable
  07/06/2025 08 PM PDT            8.79             19         0      Not Applicable
  07/06/2025 09 PM PDT            8.78             18         -      Not Applicable
  07/06/2025 10 PM PDT            8.78             18         0      Not Applicable
  07/06/2025 11 PM PDT            8.78             18         0      Not Applicable
  07/07/2025 12 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 01 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 02 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 03 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 04 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 05 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 06 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 07 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 08 AM PDT            8.78             18         0      Not Applicable
  07/07/2025 09 AM PDT            8.79             19         +      Not Applicable
  07/07/2025 10 AM PDT            8.79             19         0      Not Applicable
  07/07/2025 11 AM PDT            8.79             19         0      Not Applicable
  07/07/2025 12 PM PDT            8.78             18         -      Not Applicable
  07/07/2025 01 PM PDT            8.78             18         0      Not Applicable
  07/07/2025 02 PM PDT            8.78             18         0      Not Applicable
  07/07/2025 03 PM PDT            8.78             18         0      Not Applicable
  07/07/2025 04 PM PDT            8.77             17         -      Not Applicable
  07/07/2025 05 PM PDT            8.77             17         0      Not Applicable
  07/07/2025 06 PM PDT            8.76             17         -      Not Applicable
  07/07/2025 07 PM PDT            8.77             17         +      Not Applicable
  07/07/2025 08 PM PDT            8.77             17         0      Not Applicable
  07/07/2025 09 PM PDT            8.77             17         0      Not Applicable
  07/07/2025 10 PM PDT            8.76             17         -      Not Applicable
  07/07/2025 11 PM PDT            8.76             17         0      Not Applicable
  07/08/2025 12 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 01 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 02 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 03 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 04 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 05 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 06 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 07 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 08 AM PDT            8.76             17         0      Not Applicable
  07/08/2025 09 AM PDT            8.77             17         +      Not Applicable
  07/08/2025 10 AM PDT            8.77             17         0      Not Applicable
  07/08/2025 11 AM PDT            8.77             17         0      Not Applicable
  07/08/2025 12 PM PDT            8.77             17         0      Not Applicable
  07/08/2025 01 PM PDT            8.77             17         0      Not Applicable
  07/08/2025 02 PM PDT            8.68             13         -      Not Applicable
  07/08/2025 03 PM PDT            8.72             15         +      Not Applicable
  07/08/2025 04 PM PDT            8.76             17         +      Not Applicable
  07/08/2025 05 PM PDT            8.77             17         +      Not Applicable
  07/08/2025 06 PM PDT            8.76             17         -      Not Applicable
  07/08/2025 07 PM PDT            8.76             17         0      Not Applicable
  07/08/2025 08 PM PDT            8.76             17         0      Not Applicable
  07/08/2025 09 PM PDT            8.76             17         0      Not Applicable
  07/08/2025 10 PM PDT            8.76             17         0      Not Applicable
  07/08/2025 11 PM PDT            8.76             17         0      Not Applicable
  07/09/2025 12 AM PDT            8.76             17         0      Not Applicable
  07/09/2025 01 AM PDT            8.76             17         0      Not Applicable
  07/09/2025 02 AM PDT            8.76             17         0      Not Applicable
  07/09/2025 03 AM PDT            8.76             17         0      Not Applicable
  07/09/2025 04 AM PDT            8.76             17         0      Not Applicable
  07/09/2025 05 AM PDT            8.76             17         0      Not Applicable
  07/09/2025 06 AM PDT            8.77             17         +      Not Applicable
  07/09/2025 07 AM PDT            8.77             17         0      Not Applicable
  07/09/2025 08 AM PDT            8.77             17         0      Not Applicable
  07/09/2025 09 AM PDT            8.77             17         0      Not Applicable
  07/09/2025 10 AM PDT            8.78             18         +      Not Applicable
  07/09/2025 11 AM PDT            8.78             18         0      Not Applicable
  07/09/2025 12 PM PDT            8.78             18         0      Not Applicable
  07/09/2025 01 PM PDT            8.76             17         -      Not Applicable
  07/09/2025 02 PM PDT            8.77             17         +      Not Applicable
  07/09/2025 03 PM PDT            8.77             17         0      Not Applicable
  07/09/2025 04 PM PDT            8.77             17         0      Not Applicable
  07/09/2025 05 PM PDT            8.76             17         -      Not Applicable
  07/09/2025 06 PM PDT            8.76             17         0      Not Applicable
  07/09/2025 07 PM PDT            8.76             17         0      Not Applicable
  07/09/2025 08 PM PDT            8.76             17         0      Not Applicable
  07/09/2025 09 PM PDT            8.77             17         +      Not Applicable
  07/09/2025 10 PM PDT            8.77             17         0      Not Applicable
  07/09/2025 11 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 12 AM PDT            8.76             17         -      Not Applicable
  07/10/2025 01 AM PDT            8.77             17         +      Not Applicable
  07/10/2025 02 AM PDT            8.76             17         -      Not Applicable
  07/10/2025 03 AM PDT            8.76             17         0      Not Applicable
  07/10/2025 04 AM PDT            8.76             17         0      Not Applicable
  07/10/2025 05 AM PDT            8.76             17         0      Not Applicable
  07/10/2025 06 AM PDT            8.77             17         +      Not Applicable
  07/10/2025 07 AM PDT            8.77             17         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/10/2025 08 AM PDT            8.77             17                Not Applicable
  07/10/2025 09 AM PDT            8.77             17         0      Not Applicable
  07/10/2025 10 AM PDT            8.77             17         0      Not Applicable
  07/10/2025 11 AM PDT            8.77             17         0      Not Applicable
  07/10/2025 12 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 01 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 02 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 03 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 04 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 05 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 06 PM PDT            8.77             17         0      Not Applicable
  07/10/2025 07 PM PDT            8.76             17         -      Not Applicable
  07/10/2025 08 PM PDT            8.76             17         0      Not Applicable
  07/10/2025 09 PM PDT            8.76             17         0      Not Applicable
  07/10/2025 10 PM PDT            8.76             17         0      Not Applicable
  07/10/2025 11 PM PDT            8.76             17         0      Not Applicable
  07/11/2025 12 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 01 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 02 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 03 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 04 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 05 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 06 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 07 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 08 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 09 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 10 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 11 AM PDT            8.76             17         0      Not Applicable
  07/11/2025 12 PM PDT            8.76             17         0      Not Applicable
  07/11/2025 01 PM PDT            8.76             17         0      Not Applicable
  07/11/2025 02 PM PDT            8.76             17         0      Not Applicable
  07/11/2025 03 PM PDT            8.76             17         0      Not Applicable
  07/11/2025 04 PM PDT            8.76             17         0      Not Applicable
  07/11/2025 05 PM PDT            8.75             16         -      Not Applicable
  07/11/2025 06 PM PDT            8.75             16         0      Not Applicable
  07/11/2025 07 PM PDT            8.75             16         0      Not Applicable
  07/11/2025 08 PM PDT            8.75             16         0      Not Applicable
  07/11/2025 09 PM PDT            8.75             16         0      Not Applicable
  07/11/2025 10 PM PDT            8.75             16         0      Not Applicable
  07/11/2025 11 PM PDT            8.75             16         0      Not Applicable
  07/12/2025 12 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 01 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 02 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 03 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 04 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 05 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 06 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 07 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 08 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 09 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 10 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 11 AM PDT            8.75             16         0      Not Applicable
  07/12/2025 12 PM PDT            8.75             16         0      Not Applicable
  07/12/2025 01 PM PDT            8.75             16         0      Not Applicable
  07/12/2025 02 PM PDT            8.74             16         -      Not Applicable
  07/12/2025 03 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 04 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 05 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 06 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 07 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 08 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 09 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 10 PM PDT            8.74             16         0      Not Applicable
  07/12/2025 11 PM PDT            8.74             16         0      Not Applicable
  07/13/2025 12 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 01 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 02 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 03 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 04 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 05 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 06 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 07 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 08 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 09 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 10 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 11 AM PDT            8.74             16         0      Not Applicable
  07/13/2025 12 PM PDT            8.73             15         -      Not Applicable
  07/13/2025 01 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 02 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 03 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 04 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 05 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 06 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 07 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 08 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 09 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 10 PM PDT            8.73             15         0      Not Applicable
  07/13/2025 11 PM PDT            8.73             15         0      Not Applicable
  07/14/2025 12 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 01 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 02 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 03 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 04 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 05 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 06 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 07 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 08 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 09 AM PDT            8.73             15         0      Not Applicable
  07/14/2025 10 AM PDT            8.72             15         -      Not Applicable
  07/14/2025 11 AM PDT            8.72             15         0      Not Applicable
  07/14/2025 12 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 01 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 02 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 03 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 04 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 05 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 06 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 07 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 08 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 09 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 10 PM PDT            8.72             15         0      Not Applicable
  07/14/2025 11 PM PDT            8.72             15         0      Not Applicable
  07/15/2025 12 AM PDT            8.72             15         0      Not Applicable
  07/15/2025 01 AM PDT            8.72             15         0      Not Applicable
  07/15/2025 02 AM PDT            8.72             15         0      Not Applicable
  07/15/2025 03 AM PDT            8.72             15         0      Not Applicable
  07/15/2025 04 AM PDT            8.72             15         0      Not Applicable
  07/15/2025 05 AM PDT            8.72             15         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.