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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: | May 19 2026 at 7:23 AM PDT | Next Issuance: | May 20 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: 05/19/2026 at 07:25 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/14/2026 at 03:00 PM PDT
# Maximum Observed Stage: 8.94 Feet
# Maximum Observed Flow: 56 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/19/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 8.86 Feet
# Maximum Forecast Flow: 48 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/14/2026 07 AM PDT 8.93 55 Not Applicable
05/14/2026 08 AM PDT 8.93 55 0 Not Applicable
05/14/2026 09 AM PDT 8.93 55 0 Not Applicable
05/14/2026 10 AM PDT 8.93 55 0 Not Applicable
05/14/2026 11 AM PDT 8.93 55 0 Not Applicable
05/14/2026 12 PM PDT 8.94 56 + Not Applicable
05/14/2026 01 PM PDT 8.94 56 0 Not Applicable
05/14/2026 02 PM PDT 8.94 56 0 Not Applicable
05/14/2026 03 PM PDT 8.94 56 0 Not Applicable
05/14/2026 04 PM PDT 8.93 55 - Not Applicable
05/14/2026 05 PM PDT 8.93 55 0 Not Applicable
05/14/2026 06 PM PDT 8.93 55 0 Not Applicable
05/14/2026 07 PM PDT 8.92 54 - Not Applicable
05/14/2026 08 PM PDT 8.92 54 0 Not Applicable
05/14/2026 09 PM PDT 8.92 54 0 Not Applicable
05/14/2026 10 PM PDT 8.91 53 - Not Applicable
05/14/2026 11 PM PDT 8.92 54 + Not Applicable
05/15/2026 12 AM PDT 8.91 53 - Not Applicable
05/15/2026 01 AM PDT 8.91 53 0 Not Applicable
05/15/2026 02 AM PDT 8.92 54 + Not Applicable
05/15/2026 03 AM PDT 8.91 53 - Not Applicable
05/15/2026 04 AM PDT 8.91 53 0 Not Applicable
05/15/2026 05 AM PDT 8.91 53 0 Not Applicable
05/15/2026 06 AM PDT 8.91 53 0 Not Applicable
05/15/2026 07 AM PDT 8.91 53 0 Not Applicable
05/15/2026 08 AM PDT 8.92 54 + Not Applicable
05/15/2026 09 AM PDT 8.91 53 - Not Applicable
05/15/2026 10 AM PDT 8.92 54 + Not Applicable
05/15/2026 11 AM PDT 8.92 54 0 Not Applicable
05/15/2026 12 PM PDT 8.92 54 0 Not Applicable
05/15/2026 01 PM PDT 8.92 54 0 Not Applicable
05/15/2026 02 PM PDT 8.92 54 0 Not Applicable
05/15/2026 03 PM PDT 8.92 54 0 Not Applicable
05/15/2026 04 PM PDT 8.92 54 0 Not Applicable
05/15/2026 05 PM PDT 8.91 53 - Not Applicable
05/15/2026 06 PM PDT 8.91 53 0 Not Applicable
05/15/2026 07 PM PDT 8.90 52 - Not Applicable
05/15/2026 08 PM PDT 8.90 52 0 Not Applicable
05/15/2026 09 PM PDT 8.90 52 0 Not Applicable
05/15/2026 10 PM PDT 8.90 52 0 Not Applicable
05/15/2026 11 PM PDT 8.90 52 0 Not Applicable
05/16/2026 12 AM PDT 8.90 52 0 Not Applicable
05/16/2026 01 AM PDT 8.90 52 0 Not Applicable
05/16/2026 02 AM PDT 8.90 52 0 Not Applicable
05/16/2026 03 AM PDT 8.90 52 0 Not Applicable
05/16/2026 04 AM PDT 8.90 52 0 Not Applicable
05/16/2026 05 AM PDT 8.90 52 0 Not Applicable
05/16/2026 06 AM PDT 8.90 52 0 Not Applicable
05/16/2026 07 AM PDT 8.90 52 0 Not Applicable
05/16/2026 08 AM PDT 8.90 52 0 Not Applicable
05/16/2026 09 AM PDT 8.90 52 0 Not Applicable
05/16/2026 10 AM PDT 8.90 52 0 Not Applicable
05/16/2026 11 AM PDT 8.90 52 0 Not Applicable
05/16/2026 12 PM PDT 8.90 52 0 Not Applicable
05/16/2026 01 PM PDT 8.90 52 0 Not Applicable
05/16/2026 02 PM PDT 8.90 52 0 Not Applicable
05/16/2026 03 PM PDT 8.90 52 0 Not Applicable
05/16/2026 04 PM PDT 8.90 52 0 Not Applicable
05/16/2026 05 PM PDT 8.90 52 0 Not Applicable
05/16/2026 06 PM PDT 8.90 52 0 Not Applicable
05/16/2026 07 PM PDT 8.89 51 - Not Applicable
05/16/2026 08 PM PDT 8.89 51 0 Not Applicable
05/16/2026 09 PM PDT 8.89 51 0 Not Applicable
05/16/2026 10 PM PDT 8.89 51 0 Not Applicable
05/16/2026 11 PM PDT 8.89 51 0 Not Applicable
05/17/2026 12 AM PDT 8.89 51 0 Not Applicable
05/17/2026 01 AM PDT 8.89 51 0 Not Applicable
05/17/2026 02 AM PDT 8.89 51 0 Not Applicable
05/17/2026 03 AM PDT 8.89 51 0 Not Applicable
05/17/2026 04 AM PDT 8.89 51 0 Not Applicable
05/17/2026 05 AM PDT 8.89 51 0 Not Applicable
05/17/2026 06 AM PDT 8.89 51 0 Not Applicable
05/17/2026 07 AM PDT 8.89 51 0 Not Applicable
05/17/2026 08 AM PDT 8.89 51 0 Not Applicable
05/17/2026 09 AM PDT 8.89 51 0 Not Applicable
05/17/2026 10 AM PDT 8.89 51 0 Not Applicable
05/17/2026 11 AM PDT 8.89 51 0 Not Applicable
05/17/2026 12 PM PDT 8.89 51 0 Not Applicable
05/17/2026 01 PM PDT 8.89 51 0 Not Applicable
05/17/2026 02 PM PDT 8.89 51 0 Not Applicable
05/17/2026 03 PM PDT 8.89 51 0 Not Applicable
05/17/2026 04 PM PDT 8.89 51 0 Not Applicable
05/17/2026 05 PM PDT 8.89 51 0 Not Applicable
05/17/2026 06 PM PDT 8.88 50 - Not Applicable
05/17/2026 07 PM PDT 8.89 51 + Not Applicable
05/17/2026 08 PM PDT 8.88 50 - Not Applicable
05/17/2026 09 PM PDT 8.88 50 0 Not Applicable
05/17/2026 10 PM PDT 8.88 50 0 Not Applicable
05/17/2026 11 PM PDT 8.88 50 0 Not Applicable
05/18/2026 12 AM PDT 8.88 50 0 Not Applicable
05/18/2026 01 AM PDT 8.88 50 0 Not Applicable
05/18/2026 02 AM PDT 8.88 50 0 Not Applicable
05/18/2026 03 AM PDT 8.88 50 0 Not Applicable
05/18/2026 04 AM PDT 8.88 50 0 Not Applicable
05/18/2026 05 AM PDT 8.88 50 0 Not Applicable
05/18/2026 06 AM PDT 8.88 50 0 Not Applicable
05/18/2026 07 AM PDT 8.88 50 0 Not Applicable
05/18/2026 08 AM PDT 8.88 50 0 Not Applicable
05/18/2026 09 AM PDT 8.88 50 0 Not Applicable
05/18/2026 10 AM PDT 8.88 50 0 Not Applicable
05/18/2026 11 AM PDT 8.89 51 + Not Applicable
05/18/2026 12 PM PDT 8.89 51 0 Not Applicable
05/18/2026 01 PM PDT 8.89 51 0 Not Applicable
05/18/2026 02 PM PDT 8.89 51 0 Not Applicable
05/18/2026 03 PM PDT 8.89 51 0 Not Applicable
05/18/2026 04 PM PDT 8.88 50 - Not Applicable
05/18/2026 05 PM PDT 8.88 50 0 Not Applicable
05/18/2026 06 PM PDT 8.88 50 0 Not Applicable
05/18/2026 07 PM PDT 8.88 50 0 Not Applicable
05/18/2026 08 PM PDT 8.87 49 - Not Applicable
05/18/2026 09 PM PDT 8.87 49 0 Not Applicable
05/18/2026 10 PM PDT 8.87 49 0 Not Applicable
05/18/2026 11 PM PDT 8.87 49 0 Not Applicable
05/19/2026 12 AM PDT 8.87 49 0 Not Applicable
05/19/2026 01 AM PDT 8.86 48 - Not Applicable
05/19/2026 02 AM PDT 8.87 49 + Not Applicable
05/19/2026 03 AM PDT 8.86 48 - Not Applicable
05/19/2026 04 AM PDT 8.86 48 0 Not Applicable
05/19/2026 05 AM PDT 8.86 48 0 Not Applicable
05/19/2026 06 AM PDT 8.86 48 0 Not Applicable
05/19/2026 07 AM PDT 8.86 48 0 Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/19/2026 08 AM PDT 8.86 48 Not Applicable
05/19/2026 09 AM PDT 8.86 48 0 Not Applicable
05/19/2026 10 AM PDT 8.86 48 0 Not Applicable
05/19/2026 11 AM PDT 8.86 48 0 Not Applicable
05/19/2026 12 PM PDT 8.86 48 0 Not Applicable
05/19/2026 01 PM PDT 8.86 48 0 Not Applicable
05/19/2026 02 PM PDT 8.86 48 0 Not Applicable
05/19/2026 03 PM PDT 8.86 48 0 Not Applicable
05/19/2026 04 PM PDT 8.86 48 0 Not Applicable
05/19/2026 05 PM PDT 8.86 48 0 Not Applicable
05/19/2026 06 PM PDT 8.86 48 0 Not Applicable
05/19/2026 07 PM PDT 8.86 48 0 Not Applicable
05/19/2026 08 PM PDT 8.86 48 0 Not Applicable
05/19/2026 09 PM PDT 8.86 48 0 Not Applicable
05/19/2026 10 PM PDT 8.86 48 0 Not Applicable
05/19/2026 11 PM PDT 8.86 48 0 Not Applicable
05/20/2026 12 AM PDT 8.85 47 - Not Applicable
05/20/2026 01 AM PDT 8.85 47 0 Not Applicable
05/20/2026 02 AM PDT 8.85 47 0 Not Applicable
05/20/2026 03 AM PDT 8.85 47 0 Not Applicable
05/20/2026 04 AM PDT 8.85 47 0 Not Applicable
05/20/2026 05 AM PDT 8.85 47 0 Not Applicable
05/20/2026 06 AM PDT 8.85 47 0 Not Applicable
05/20/2026 07 AM PDT 8.85 47 0 Not Applicable
05/20/2026 08 AM PDT 8.85 47 0 Not Applicable
05/20/2026 09 AM PDT 8.85 47 0 Not Applicable
05/20/2026 10 AM PDT 8.85 47 0 Not Applicable
05/20/2026 11 AM PDT 8.85 47 0 Not Applicable
05/20/2026 12 PM PDT 8.85 47 0 Not Applicable
05/20/2026 01 PM PDT 8.85 47 0 Not Applicable
05/20/2026 02 PM PDT 8.85 47 0 Not Applicable
05/20/2026 03 PM PDT 8.85 47 0 Not Applicable
05/20/2026 04 PM PDT 8.85 47 0 Not Applicable
05/20/2026 05 PM PDT 8.85 47 0 Not Applicable
05/20/2026 06 PM PDT 8.85 47 0 Not Applicable
05/20/2026 07 PM PDT 8.85 47 0 Not Applicable
05/20/2026 08 PM PDT 8.85 47 0 Not Applicable
05/20/2026 09 PM PDT 8.85 47 0 Not Applicable
05/20/2026 10 PM PDT 8.85 47 0 Not Applicable
05/20/2026 11 PM PDT 8.85 47 0 Not Applicable
05/21/2026 12 AM PDT 8.85 47 0 Not Applicable
05/21/2026 01 AM PDT 8.85 47 0 Not Applicable
05/21/2026 02 AM PDT 8.85 47 0 Not Applicable
05/21/2026 03 AM PDT 8.85 47 0 Not Applicable
05/21/2026 04 AM PDT 8.85 47 0 Not Applicable
05/21/2026 05 AM PDT 8.85 47 0 Not Applicable
05/21/2026 06 AM PDT 8.85 47 0 Not Applicable
05/21/2026 07 AM PDT 8.84 46 - Not Applicable
05/21/2026 08 AM PDT 8.84 46 0 Not Applicable
05/21/2026 09 AM PDT 8.84 46 0 Not Applicable
05/21/2026 10 AM PDT 8.84 46 0 Not Applicable
05/21/2026 11 AM PDT 8.84 46 0 Not Applicable
05/21/2026 12 PM PDT 8.84 46 0 Not Applicable
05/21/2026 01 PM PDT 8.84 46 0 Not Applicable
05/21/2026 02 PM PDT 8.84 46 0 Not Applicable
05/21/2026 03 PM PDT 8.84 46 0 Not Applicable
05/21/2026 04 PM PDT 8.84 46 0 Not Applicable
05/21/2026 05 PM PDT 8.84 46 0 Not Applicable
05/21/2026 06 PM PDT 8.84 46 0 Not Applicable
05/21/2026 07 PM PDT 8.84 46 0 Not Applicable
05/21/2026 08 PM PDT 8.84 46 0 Not Applicable
05/21/2026 09 PM PDT 8.84 46 0 Not Applicable
05/21/2026 10 PM PDT 8.84 46 0 Not Applicable
05/21/2026 11 PM PDT 8.84 46 0 Not Applicable
05/22/2026 12 AM PDT 8.84 46 0 Not Applicable
05/22/2026 01 AM PDT 8.84 46 0 Not Applicable
05/22/2026 02 AM PDT 8.84 46 0 Not Applicable
05/22/2026 03 AM PDT 8.84 46 0 Not Applicable
05/22/2026 04 AM PDT 8.84 46 0 Not Applicable
05/22/2026 05 AM PDT 8.84 46 0 Not Applicable
05/22/2026 06 AM PDT 8.84 46 0 Not Applicable
05/22/2026 07 AM PDT 8.84 46 0 Not Applicable
05/22/2026 08 AM PDT 8.84 46 0 Not Applicable
05/22/2026 09 AM PDT 8.84 46 0 Not Applicable
05/22/2026 10 AM PDT 8.84 46 0 Not Applicable
05/22/2026 11 AM PDT 8.84 46 0 Not Applicable
05/22/2026 12 PM PDT 8.84 46 0 Not Applicable
05/22/2026 01 PM PDT 8.84 46 0 Not Applicable
05/22/2026 02 PM PDT 8.84 46 0 Not Applicable
05/22/2026 03 PM PDT 8.83 45 - Not Applicable
05/22/2026 04 PM PDT 8.83 45 0 Not Applicable
05/22/2026 05 PM PDT 8.83 45 0 Not Applicable
05/22/2026 06 PM PDT 8.83 45 0 Not Applicable
05/22/2026 07 PM PDT 8.83 45 0 Not Applicable
05/22/2026 08 PM PDT 8.83 45 0 Not Applicable
05/22/2026 09 PM PDT 8.83 45 0 Not Applicable
05/22/2026 10 PM PDT 8.83 45 0 Not Applicable
05/22/2026 11 PM PDT 8.83 45 0 Not Applicable
05/23/2026 12 AM PDT 8.83 45 0 Not Applicable
05/23/2026 01 AM PDT 8.83 45 0 Not Applicable
05/23/2026 02 AM PDT 8.83 45 0 Not Applicable
05/23/2026 03 AM PDT 8.83 45 0 Not Applicable
05/23/2026 04 AM PDT 8.83 45 0 Not Applicable
05/23/2026 05 AM PDT 8.83 45 0 Not Applicable
05/23/2026 06 AM PDT 8.83 45 0 Not Applicable
05/23/2026 07 AM PDT 8.83 45 0 Not Applicable
05/23/2026 08 AM PDT 8.83 45 0 Not Applicable
05/23/2026 09 AM PDT 8.83 45 0 Not Applicable
05/23/2026 10 AM PDT 8.83 45 0 Not Applicable
05/23/2026 11 AM PDT 8.83 45 0 Not Applicable
05/23/2026 12 PM PDT 8.83 45 0 Not Applicable
05/23/2026 01 PM PDT 8.83 45 0 Not Applicable
05/23/2026 02 PM PDT 8.83 45 0 Not Applicable
05/23/2026 03 PM PDT 8.83 45 0 Not Applicable
05/23/2026 04 PM PDT 8.83 45 0 Not Applicable
05/23/2026 05 PM PDT 8.83 45 0 Not Applicable
05/23/2026 06 PM PDT 8.83 45 0 Not Applicable
05/23/2026 07 PM PDT 8.83 45 0 Not Applicable
05/23/2026 08 PM PDT 8.82 45 - Not Applicable
05/23/2026 09 PM PDT 8.82 45 0 Not Applicable
05/23/2026 10 PM PDT 8.82 45 0 Not Applicable
05/23/2026 11 PM PDT 8.82 45 0 Not Applicable
05/24/2026 12 AM PDT 8.82 45 0 Not Applicable
05/24/2026 01 AM PDT 8.82 45 0 Not Applicable
05/24/2026 02 AM PDT 8.82 45 0 Not Applicable
05/24/2026 03 AM PDT 8.82 45 0 Not Applicable
05/24/2026 04 AM PDT 8.82 45 0 Not Applicable
05/24/2026 05 AM PDT 8.82 45 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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