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MATTOLE RIVER - ETTERSBURG (ETTC1)
| Latitude: 40.14º N | Longitude: 123.99º W | Elevation: 579 Feet | | Forecast Type: Unofficial Location |
| Location: Humboldt County in California | Bulletin Group: North Coast | River Group: North Coast |
| Issuance Time: | Sep 13 2026 at 7:57 AM PDT | Next Issuance: | Sep 14 2026 at 9:00 AM PDT
| |
| Action: 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: 09/13/2026 at 07:59 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 09/08/2026 at 04:00 PM PDT
# Maximum Observed Stage: 8.41 Feet
# Maximum Observed Flow: 9 cfs
#
# Earliest Date & Time of Maximum Forecast: 09/13/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 8.36 Feet
# Maximum Forecast Flow: 7 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
09/08/2026 07 AM PDT 8.41 9 Not Applicable
09/08/2026 08 AM PDT 8.41 9 0 Not Applicable
09/08/2026 09 AM PDT 8.40 9 - Not Applicable
09/08/2026 10 AM PDT 8.41 9 + Not Applicable
09/08/2026 11 AM PDT 8.41 9 0 Not Applicable
09/08/2026 12 PM PDT 8.41 9 0 Not Applicable
09/08/2026 01 PM PDT 8.41 9 0 Not Applicable
09/08/2026 02 PM PDT 8.41 9 0 Not Applicable
09/08/2026 03 PM PDT 8.41 9 0 Not Applicable
09/08/2026 04 PM PDT 8.41 9 0 Not Applicable
09/08/2026 05 PM PDT 8.40 9 - Not Applicable
09/08/2026 06 PM PDT 8.40 9 0 Not Applicable
09/08/2026 07 PM PDT 8.40 9 0 Not Applicable
09/08/2026 08 PM PDT 8.40 9 0 Not Applicable
09/08/2026 09 PM PDT 8.40 9 0 Not Applicable
09/08/2026 10 PM PDT 8.40 9 0 Not Applicable
09/08/2026 11 PM PDT 8.40 9 0 Not Applicable
09/09/2026 12 AM PDT 8.40 9 0 Not Applicable
09/09/2026 01 AM PDT 8.40 9 0 Not Applicable
09/09/2026 02 AM PDT 8.40 9 0 Not Applicable
09/09/2026 03 AM PDT 8.40 9 0 Not Applicable
09/09/2026 04 AM PDT 8.40 9 0 Not Applicable
09/09/2026 05 AM PDT 8.40 9 0 Not Applicable
09/09/2026 06 AM PDT 8.39 9 - Not Applicable
09/09/2026 07 AM PDT 8.39 9 0 Not Applicable
09/09/2026 08 AM PDT 8.39 9 0 Not Applicable
09/09/2026 09 AM PDT 8.39 9 0 Not Applicable
09/09/2026 10 AM PDT 8.39 9 0 Not Applicable
09/09/2026 11 AM PDT 8.40 9 + Not Applicable
09/09/2026 12 PM PDT 8.40 9 0 Not Applicable
09/09/2026 01 PM PDT 8.40 9 0 Not Applicable
09/09/2026 02 PM PDT 8.40 9 0 Not Applicable
09/09/2026 03 PM PDT 8.40 9 0 Not Applicable
09/09/2026 04 PM PDT 8.39 9 - Not Applicable
09/09/2026 05 PM PDT 8.39 9 0 Not Applicable
09/09/2026 06 PM PDT 8.39 9 0 Not Applicable
09/09/2026 07 PM PDT 8.39 9 0 Not Applicable
09/09/2026 08 PM PDT 8.40 9 + Not Applicable
09/09/2026 09 PM PDT 8.39 9 - Not Applicable
09/09/2026 10 PM PDT 8.40 9 + Not Applicable
09/09/2026 11 PM PDT 8.40 9 0 Not Applicable
09/10/2026 12 AM PDT 8.40 9 0 Not Applicable
09/10/2026 01 AM PDT 8.39 9 - Not Applicable
09/10/2026 02 AM PDT 8.39 9 0 Not Applicable
09/10/2026 03 AM PDT 8.39 9 0 Not Applicable
09/10/2026 04 AM PDT 8.39 9 0 Not Applicable
09/10/2026 05 AM PDT 8.39 9 0 Not Applicable
09/10/2026 06 AM PDT 8.39 9 0 Not Applicable
09/10/2026 07 AM PDT 8.39 9 0 Not Applicable
09/10/2026 08 AM PDT 8.39 9 0 Not Applicable
09/10/2026 09 AM PDT 8.39 9 0 Not Applicable
09/10/2026 10 AM PDT 8.39 9 0 Not Applicable
09/10/2026 11 AM PDT 8.39 9 0 Not Applicable
09/10/2026 12 PM PDT 8.39 9 0 Not Applicable
09/10/2026 01 PM PDT 8.39 9 0 Not Applicable
09/10/2026 02 PM PDT 8.39 9 0 Not Applicable
09/10/2026 03 PM PDT 8.39 9 0 Not Applicable
09/10/2026 04 PM PDT 8.39 9 0 Not Applicable
09/10/2026 05 PM PDT 8.39 9 0 Not Applicable
09/10/2026 06 PM PDT 8.39 9 0 Not Applicable
09/10/2026 07 PM PDT 8.39 9 0 Not Applicable
09/10/2026 08 PM PDT 8.39 9 0 Not Applicable
09/10/2026 09 PM PDT 8.39 9 0 Not Applicable
09/10/2026 10 PM PDT 8.39 9 0 Not Applicable
09/10/2026 11 PM PDT 8.39 9 0 Not Applicable
09/11/2026 12 AM PDT 8.39 9 0 Not Applicable
09/11/2026 01 AM PDT 8.39 9 0 Not Applicable
09/11/2026 02 AM PDT 8.39 9 0 Not Applicable
09/11/2026 03 AM PDT 8.38 8 - Not Applicable
09/11/2026 04 AM PDT 8.38 8 0 Not Applicable
09/11/2026 05 AM PDT 8.38 8 0 Not Applicable
09/11/2026 06 AM PDT 8.38 8 0 Not Applicable
09/11/2026 07 AM PDT 8.38 8 0 Not Applicable
09/11/2026 08 AM PDT 8.38 8 0 Not Applicable
09/11/2026 09 AM PDT 8.38 8 0 Not Applicable
09/11/2026 10 AM PDT 8.38 8 0 Not Applicable
09/11/2026 11 AM PDT 8.38 8 0 Not Applicable
09/11/2026 12 PM PDT 8.38 8 0 Not Applicable
09/11/2026 01 PM PDT 8.38 8 0 Not Applicable
09/11/2026 02 PM PDT 8.38 8 0 Not Applicable
09/11/2026 03 PM PDT 8.38 8 0 Not Applicable
09/11/2026 04 PM PDT 8.38 8 0 Not Applicable
09/11/2026 05 PM PDT 8.38 8 0 Not Applicable
09/11/2026 06 PM PDT 8.37 8 - Not Applicable
09/11/2026 07 PM PDT 8.37 8 0 Not Applicable
09/11/2026 08 PM PDT 8.37 8 0 Not Applicable
09/11/2026 09 PM PDT 8.37 8 0 Not Applicable
09/11/2026 10 PM PDT 8.37 8 0 Not Applicable
09/11/2026 11 PM PDT 8.37 8 0 Not Applicable
09/12/2026 12 AM PDT 8.37 8 0 Not Applicable
09/12/2026 01 AM PDT 8.37 8 0 Not Applicable
09/12/2026 02 AM PDT 8.37 8 0 Not Applicable
09/12/2026 03 AM PDT 8.37 8 0 Not Applicable
09/12/2026 04 AM PDT 8.37 8 0 Not Applicable
09/12/2026 05 AM PDT 8.37 8 0 Not Applicable
09/12/2026 06 AM PDT 8.37 8 0 Not Applicable
09/12/2026 07 AM PDT 8.37 8 0 Not Applicable
09/12/2026 08 AM PDT 8.37 8 0 Not Applicable
09/12/2026 09 AM PDT 8.37 8 0 Not Applicable
09/12/2026 10 AM PDT 8.37 8 0 Not Applicable
09/12/2026 11 AM PDT 8.37 8 0 Not Applicable
09/12/2026 12 PM PDT 8.37 8 0 Not Applicable
09/12/2026 01 PM PDT 8.37 8 0 Not Applicable
09/12/2026 02 PM PDT 8.37 8 0 Not Applicable
09/12/2026 03 PM PDT 8.37 8 0 Not Applicable
09/12/2026 04 PM PDT 8.37 8 0 Not Applicable
09/12/2026 05 PM PDT 8.37 8 0 Not Applicable
09/12/2026 06 PM PDT 8.37 8 0 Not Applicable
09/12/2026 07 PM PDT 8.37 8 0 Not Applicable
09/12/2026 08 PM PDT 8.36 7 - Not Applicable
09/12/2026 09 PM PDT 8.36 7 0 Not Applicable
09/12/2026 10 PM PDT 8.36 7 0 Not Applicable
09/12/2026 11 PM PDT 8.37 8 + Not Applicable
09/13/2026 12 AM PDT 8.37 8 0 Not Applicable
09/13/2026 01 AM PDT 8.37 8 0 Not Applicable
09/13/2026 02 AM PDT 8.37 8 0 Not Applicable
09/13/2026 03 AM PDT 8.36 7 - Not Applicable
09/13/2026 04 AM PDT 8.36 7 0 Not Applicable
09/13/2026 05 AM PDT 8.36 7 0 Not Applicable
09/13/2026 06 AM PDT 8.36 7 0 Not Applicable
09/13/2026 07 AM PDT 8.36 7 0 Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
09/13/2026 08 AM PDT 8.36 7 Not Applicable
09/13/2026 09 AM PDT 8.36 7 0 Not Applicable
09/13/2026 10 AM PDT 8.36 7 0 Not Applicable
09/13/2026 11 AM PDT 8.36 7 0 Not Applicable
09/13/2026 12 PM PDT 8.36 7 0 Not Applicable
09/13/2026 01 PM PDT 8.36 7 0 Not Applicable
09/13/2026 02 PM PDT 8.36 7 0 Not Applicable
09/13/2026 03 PM PDT 8.36 7 0 Not Applicable
09/13/2026 04 PM PDT 8.36 7 0 Not Applicable
09/13/2026 05 PM PDT 8.36 7 0 Not Applicable
09/13/2026 06 PM PDT 8.36 7 0 Not Applicable
09/13/2026 07 PM PDT 8.36 7 0 Not Applicable
09/13/2026 08 PM PDT 8.36 7 0 Not Applicable
09/13/2026 09 PM PDT 8.36 7 0 Not Applicable
09/13/2026 10 PM PDT 8.36 7 0 Not Applicable
09/13/2026 11 PM PDT 8.36 7 0 Not Applicable
09/14/2026 12 AM PDT 8.36 7 0 Not Applicable
09/14/2026 01 AM PDT 8.36 7 0 Not Applicable
09/14/2026 02 AM PDT 8.35 7 - Not Applicable
09/14/2026 03 AM PDT 8.35 7 0 Not Applicable
09/14/2026 04 AM PDT 8.35 7 0 Not Applicable
09/14/2026 05 AM PDT 8.35 7 0 Not Applicable
09/14/2026 06 AM PDT 8.35 7 0 Not Applicable
09/14/2026 07 AM PDT 8.35 7 0 Not Applicable
09/14/2026 08 AM PDT 8.35 7 0 Not Applicable
09/14/2026 09 AM PDT 8.35 7 0 Not Applicable
09/14/2026 10 AM PDT 8.35 7 0 Not Applicable
09/14/2026 11 AM PDT 8.35 7 0 Not Applicable
09/14/2026 12 PM PDT 8.35 7 0 Not Applicable
09/14/2026 01 PM PDT 8.35 7 0 Not Applicable
09/14/2026 02 PM PDT 8.35 7 0 Not Applicable
09/14/2026 03 PM PDT 8.35 7 0 Not Applicable
09/14/2026 04 PM PDT 8.35 7 0 Not Applicable
09/14/2026 05 PM PDT 8.35 7 0 Not Applicable
09/14/2026 06 PM PDT 8.35 7 0 Not Applicable
09/14/2026 07 PM PDT 8.35 7 0 Not Applicable
09/14/2026 08 PM PDT 8.35 7 0 Not Applicable
09/14/2026 09 PM PDT 8.35 7 0 Not Applicable
09/14/2026 10 PM PDT 8.35 7 0 Not Applicable
09/14/2026 11 PM PDT 8.35 7 0 Not Applicable
09/15/2026 12 AM PDT 8.35 7 0 Not Applicable
09/15/2026 01 AM PDT 8.35 7 0 Not Applicable
09/15/2026 02 AM PDT 8.35 7 0 Not Applicable
09/15/2026 03 AM PDT 8.35 7 0 Not Applicable
09/15/2026 04 AM PDT 8.35 7 0 Not Applicable
09/15/2026 05 AM PDT 8.35 7 0 Not Applicable
09/15/2026 06 AM PDT 8.35 7 0 Not Applicable
09/15/2026 07 AM PDT 8.35 7 0 Not Applicable
09/15/2026 08 AM PDT 8.35 7 0 Not Applicable
09/15/2026 09 AM PDT 8.35 7 0 Not Applicable
09/15/2026 10 AM PDT 8.35 7 0 Not Applicable
09/15/2026 11 AM PDT 8.35 7 0 Not Applicable
09/15/2026 12 PM PDT 8.35 7 0 Not Applicable
09/15/2026 01 PM PDT 8.35 7 0 Not Applicable
09/15/2026 02 PM PDT 8.34 7 - Not Applicable
09/15/2026 03 PM PDT 8.34 7 0 Not Applicable
09/15/2026 04 PM PDT 8.34 7 0 Not Applicable
09/15/2026 05 PM PDT 8.34 7 0 Not Applicable
09/15/2026 06 PM PDT 8.34 7 0 Not Applicable
09/15/2026 07 PM PDT 8.34 7 0 Not Applicable
09/15/2026 08 PM PDT 8.34 7 0 Not Applicable
09/15/2026 09 PM PDT 8.34 7 0 Not Applicable
09/15/2026 10 PM PDT 8.34 7 0 Not Applicable
09/15/2026 11 PM PDT 8.34 7 0 Not Applicable
09/16/2026 12 AM PDT 8.34 7 0 Not Applicable
09/16/2026 01 AM PDT 8.34 7 0 Not Applicable
09/16/2026 02 AM PDT 8.34 7 0 Not Applicable
09/16/2026 03 AM PDT 8.34 7 0 Not Applicable
09/16/2026 04 AM PDT 8.34 7 0 Not Applicable
09/16/2026 05 AM PDT 8.34 7 0 Not Applicable
09/16/2026 06 AM PDT 8.34 7 0 Not Applicable
09/16/2026 07 AM PDT 8.34 7 0 Not Applicable
09/16/2026 08 AM PDT 8.34 7 0 Not Applicable
09/16/2026 09 AM PDT 8.34 7 0 Not Applicable
09/16/2026 10 AM PDT 8.34 7 0 Not Applicable
09/16/2026 11 AM PDT 8.34 7 0 Not Applicable
09/16/2026 12 PM PDT 8.34 7 0 Not Applicable
09/16/2026 01 PM PDT 8.34 7 0 Not Applicable
09/16/2026 02 PM PDT 8.34 7 0 Not Applicable
09/16/2026 03 PM PDT 8.34 7 0 Not Applicable
09/16/2026 04 PM PDT 8.34 7 0 Not Applicable
09/16/2026 05 PM PDT 8.34 7 0 Not Applicable
09/16/2026 06 PM PDT 8.34 7 0 Not Applicable
09/16/2026 07 PM PDT 8.34 7 0 Not Applicable
09/16/2026 08 PM PDT 8.34 7 0 Not Applicable
09/16/2026 09 PM PDT 8.34 7 0 Not Applicable
09/16/2026 10 PM PDT 8.34 7 0 Not Applicable
09/16/2026 11 PM PDT 8.34 7 0 Not Applicable
09/17/2026 12 AM PDT 8.34 7 0 Not Applicable
09/17/2026 01 AM PDT 8.34 7 0 Not Applicable
09/17/2026 02 AM PDT 8.34 7 0 Not Applicable
09/17/2026 03 AM PDT 8.34 7 0 Not Applicable
09/17/2026 04 AM PDT 8.33 6 - Not Applicable
09/17/2026 05 AM PDT 8.33 6 0 Not Applicable
09/17/2026 06 AM PDT 8.33 6 0 Not Applicable
09/17/2026 07 AM PDT 8.33 6 0 Not Applicable
09/17/2026 08 AM PDT 8.33 6 0 Not Applicable
09/17/2026 09 AM PDT 8.33 6 0 Not Applicable
09/17/2026 10 AM PDT 8.33 6 0 Not Applicable
09/17/2026 11 AM PDT 8.33 6 0 Not Applicable
09/17/2026 12 PM PDT 8.33 6 0 Not Applicable
09/17/2026 01 PM PDT 8.33 6 0 Not Applicable
09/17/2026 02 PM PDT 8.33 6 0 Not Applicable
09/17/2026 03 PM PDT 8.33 6 0 Not Applicable
09/17/2026 04 PM PDT 8.33 6 0 Not Applicable
09/17/2026 05 PM PDT 8.33 6 0 Not Applicable
09/17/2026 06 PM PDT 8.33 6 0 Not Applicable
09/17/2026 07 PM PDT 8.33 6 0 Not Applicable
09/17/2026 08 PM PDT 8.33 6 0 Not Applicable
09/17/2026 09 PM PDT 8.33 6 0 Not Applicable
09/17/2026 10 PM PDT 8.33 6 0 Not Applicable
09/17/2026 11 PM PDT 8.33 6 0 Not Applicable
09/18/2026 12 AM PDT 8.33 6 0 Not Applicable
09/18/2026 01 AM PDT 8.33 6 0 Not Applicable
09/18/2026 02 AM PDT 8.33 6 0 Not Applicable
09/18/2026 03 AM PDT 8.33 6 0 Not Applicable
09/18/2026 04 AM PDT 8.33 6 0 Not Applicable
09/18/2026 05 AM PDT 8.33 6 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.
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