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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 08 2026 at 8:13 AM PDT | Next Issuance: | May 09 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: 05/08/2026 at 08:15 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/03/2026 at 11:00 AM PDT
# Maximum Observed Stage: 9.13 Feet
# Maximum Observed Flow: 78 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/08/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 9.03 Feet
# Maximum Forecast Flow: 66 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/03/2026 08 AM PDT 9.12 76 Not Applicable
05/03/2026 09 AM PDT 9.12 76 0 Not Applicable
05/03/2026 10 AM PDT 9.12 76 0 Not Applicable
05/03/2026 11 AM PDT 9.13 78 + Not Applicable
05/03/2026 12 PM PDT 9.12 76 - Not Applicable
05/03/2026 01 PM PDT 9.12 76 0 Not Applicable
05/03/2026 02 PM PDT 9.12 76 0 Not Applicable
05/03/2026 03 PM PDT 9.12 76 0 Not Applicable
05/03/2026 04 PM PDT 9.12 76 0 Not Applicable
05/03/2026 05 PM PDT 9.12 76 0 Not Applicable
05/03/2026 06 PM PDT 9.12 76 0 Not Applicable
05/03/2026 07 PM PDT 9.12 76 0 Not Applicable
05/03/2026 08 PM PDT 9.12 76 0 Not Applicable
05/03/2026 09 PM PDT 9.12 76 0 Not Applicable
05/03/2026 10 PM PDT 9.11 75 - Not Applicable
05/03/2026 11 PM PDT 9.12 76 + Not Applicable
05/04/2026 12 AM PDT 9.11 75 - Not Applicable
05/04/2026 01 AM PDT 9.11 75 0 Not Applicable
05/04/2026 02 AM PDT 9.11 75 0 Not Applicable
05/04/2026 03 AM PDT 9.11 75 0 Not Applicable
05/04/2026 04 AM PDT 9.11 75 0 Not Applicable
05/04/2026 05 AM PDT 9.11 75 0 Not Applicable
05/04/2026 06 AM PDT 9.11 75 0 Not Applicable
05/04/2026 07 AM PDT 9.12 76 + Not Applicable
05/04/2026 08 AM PDT 9.11 75 - Not Applicable
05/04/2026 09 AM PDT 9.11 75 0 Not Applicable
05/04/2026 10 AM PDT 9.11 75 0 Not Applicable
05/04/2026 11 AM PDT 9.11 75 0 Not Applicable
05/04/2026 12 PM PDT 9.11 75 0 Not Applicable
05/04/2026 01 PM PDT 9.11 75 0 Not Applicable
05/04/2026 02 PM PDT 9.11 75 0 Not Applicable
05/04/2026 03 PM PDT 9.11 75 0 Not Applicable
05/04/2026 04 PM PDT 9.11 75 0 Not Applicable
05/04/2026 05 PM PDT 9.11 75 0 Not Applicable
05/04/2026 06 PM PDT 9.11 75 0 Not Applicable
05/04/2026 07 PM PDT 9.11 75 0 Not Applicable
05/04/2026 08 PM PDT 9.10 74 - Not Applicable
05/04/2026 09 PM PDT 9.10 74 0 Not Applicable
05/04/2026 10 PM PDT 9.10 74 0 Not Applicable
05/04/2026 11 PM PDT 9.10 74 0 Not Applicable
05/05/2026 12 AM PDT 9.10 74 0 Not Applicable
05/05/2026 01 AM PDT 9.10 74 0 Not Applicable
05/05/2026 02 AM PDT 9.10 74 0 Not Applicable
05/05/2026 03 AM PDT 9.10 74 0 Not Applicable
05/05/2026 04 AM PDT 9.10 74 0 Not Applicable
05/05/2026 05 AM PDT 9.10 74 0 Not Applicable
05/05/2026 06 AM PDT 9.10 74 0 Not Applicable
05/05/2026 07 AM PDT 9.10 74 0 Not Applicable
05/05/2026 08 AM PDT 9.10 74 0 Not Applicable
05/05/2026 09 AM PDT 9.10 74 0 Not Applicable
05/05/2026 10 AM PDT 9.10 74 0 Not Applicable
05/05/2026 11 AM PDT 9.10 74 0 Not Applicable
05/05/2026 12 PM PDT 9.10 74 0 Not Applicable
05/05/2026 01 PM PDT 9.10 74 0 Not Applicable
05/05/2026 02 PM PDT 9.10 74 0 Not Applicable
05/05/2026 03 PM PDT 9.10 74 0 Not Applicable
05/05/2026 04 PM PDT 9.09 72 - Not Applicable
05/05/2026 05 PM PDT 9.09 72 0 Not Applicable
05/05/2026 06 PM PDT 9.09 72 0 Not Applicable
05/05/2026 07 PM PDT 9.09 72 0 Not Applicable
05/05/2026 08 PM PDT 9.08 71 - Not Applicable
05/05/2026 09 PM PDT 9.08 71 0 Not Applicable
05/05/2026 10 PM PDT 9.08 71 0 Not Applicable
05/05/2026 11 PM PDT 9.08 71 0 Not Applicable
05/06/2026 12 AM PDT 9.08 71 0 Not Applicable
05/06/2026 01 AM PDT 9.08 71 0 Not Applicable
05/06/2026 02 AM PDT 9.08 71 0 Not Applicable
05/06/2026 03 AM PDT 9.08 71 0 Not Applicable
05/06/2026 04 AM PDT 9.08 71 0 Not Applicable
05/06/2026 05 AM PDT 9.07 70 - Not Applicable
05/06/2026 06 AM PDT 9.07 70 0 Not Applicable
05/06/2026 07 AM PDT 9.07 70 0 Not Applicable
05/06/2026 08 AM PDT 9.07 70 0 Not Applicable
05/06/2026 09 AM PDT 9.07 70 0 Not Applicable
05/06/2026 10 AM PDT 9.07 70 0 Not Applicable
05/06/2026 11 AM PDT 9.07 70 0 Not Applicable
05/06/2026 12 PM PDT 9.07 70 0 Not Applicable
05/06/2026 01 PM PDT 9.07 70 0 Not Applicable
05/06/2026 02 PM PDT 9.07 70 0 Not Applicable
05/06/2026 03 PM PDT 9.07 70 0 Not Applicable
05/06/2026 04 PM PDT 9.07 70 0 Not Applicable
05/06/2026 05 PM PDT 9.07 70 0 Not Applicable
05/06/2026 06 PM PDT 9.06 69 - Not Applicable
05/06/2026 07 PM PDT 9.06 69 0 Not Applicable
05/06/2026 08 PM PDT 9.06 69 0 Not Applicable
05/06/2026 09 PM PDT 9.06 69 0 Not Applicable
05/06/2026 10 PM PDT 9.06 69 0 Not Applicable
05/06/2026 11 PM PDT 9.06 69 0 Not Applicable
05/07/2026 12 AM PDT 9.06 69 0 Not Applicable
05/07/2026 01 AM PDT 9.06 69 0 Not Applicable
05/07/2026 02 AM PDT 9.06 69 0 Not Applicable
05/07/2026 03 AM PDT 9.05 68 - Not Applicable
05/07/2026 04 AM PDT 9.05 68 0 Not Applicable
05/07/2026 05 AM PDT 9.05 68 0 Not Applicable
05/07/2026 06 AM PDT 9.05 68 0 Not Applicable
05/07/2026 07 AM PDT 9.05 68 0 Not Applicable
05/07/2026 08 AM PDT 9.05 68 0 Not Applicable
05/07/2026 09 AM PDT 9.05 68 0 Not Applicable
05/07/2026 10 AM PDT 9.05 68 0 Not Applicable
05/07/2026 11 AM PDT 9.06 69 + Not Applicable
05/07/2026 12 PM PDT 9.06 69 0 Not Applicable
05/07/2026 01 PM PDT 9.06 69 0 Not Applicable
05/07/2026 02 PM PDT 9.05 68 - Not Applicable
05/07/2026 03 PM PDT 9.05 68 0 Not Applicable
05/07/2026 04 PM PDT 9.06 69 + Not Applicable
05/07/2026 05 PM PDT 9.05 68 - Not Applicable
05/07/2026 06 PM PDT 9.05 68 0 Not Applicable
05/07/2026 07 PM PDT 9.05 68 0 Not Applicable
05/07/2026 08 PM PDT 9.04 67 - Not Applicable
05/07/2026 09 PM PDT 9.04 67 0 Not Applicable
05/07/2026 10 PM PDT 9.04 67 0 Not Applicable
05/07/2026 11 PM PDT 9.04 67 0 Not Applicable
05/08/2026 12 AM PDT 9.04 67 0 Not Applicable
05/08/2026 01 AM PDT 9.03 66 - Not Applicable
05/08/2026 02 AM PDT 9.04 67 + Not Applicable
05/08/2026 03 AM PDT 9.04 67 0 Not Applicable
05/08/2026 04 AM PDT 9.04 67 0 Not Applicable
05/08/2026 05 AM PDT 9.03 66 - Not Applicable
05/08/2026 06 AM PDT 9.03 66 0 Not Applicable
05/08/2026 07 AM PDT 9.03 66 0 Not Applicable
05/08/2026 08 AM PDT 9.03 66 0 Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/08/2026 09 AM PDT 9.03 66 Not Applicable
05/08/2026 10 AM PDT 9.03 66 0 Not Applicable
05/08/2026 11 AM PDT 9.03 66 0 Not Applicable
05/08/2026 12 PM PDT 9.03 66 0 Not Applicable
05/08/2026 01 PM PDT 9.03 66 0 Not Applicable
05/08/2026 02 PM PDT 9.03 66 0 Not Applicable
05/08/2026 03 PM PDT 9.03 66 0 Not Applicable
05/08/2026 04 PM PDT 9.03 66 0 Not Applicable
05/08/2026 05 PM PDT 9.03 66 0 Not Applicable
05/08/2026 06 PM PDT 9.03 66 0 Not Applicable
05/08/2026 07 PM PDT 9.03 66 0 Not Applicable
05/08/2026 08 PM PDT 9.03 66 0 Not Applicable
05/08/2026 09 PM PDT 9.03 66 0 Not Applicable
05/08/2026 10 PM PDT 9.03 66 0 Not Applicable
05/08/2026 11 PM PDT 9.02 64 - Not Applicable
05/09/2026 12 AM PDT 9.02 64 0 Not Applicable
05/09/2026 01 AM PDT 9.02 64 0 Not Applicable
05/09/2026 02 AM PDT 9.02 64 0 Not Applicable
05/09/2026 03 AM PDT 9.02 64 0 Not Applicable
05/09/2026 04 AM PDT 9.02 64 0 Not Applicable
05/09/2026 05 AM PDT 9.02 64 0 Not Applicable
05/09/2026 06 AM PDT 9.02 64 0 Not Applicable
05/09/2026 07 AM PDT 9.02 64 0 Not Applicable
05/09/2026 08 AM PDT 9.02 64 0 Not Applicable
05/09/2026 09 AM PDT 9.02 64 0 Not Applicable
05/09/2026 10 AM PDT 9.02 64 0 Not Applicable
05/09/2026 11 AM PDT 9.02 64 0 Not Applicable
05/09/2026 12 PM PDT 9.02 64 0 Not Applicable
05/09/2026 01 PM PDT 9.02 64 0 Not Applicable
05/09/2026 02 PM PDT 9.02 64 0 Not Applicable
05/09/2026 03 PM PDT 9.02 64 0 Not Applicable
05/09/2026 04 PM PDT 9.02 64 0 Not Applicable
05/09/2026 05 PM PDT 9.02 64 0 Not Applicable
05/09/2026 06 PM PDT 9.02 64 0 Not Applicable
05/09/2026 07 PM PDT 9.02 64 0 Not Applicable
05/09/2026 08 PM PDT 9.02 64 0 Not Applicable
05/09/2026 09 PM PDT 9.02 64 0 Not Applicable
05/09/2026 10 PM PDT 9.02 64 0 Not Applicable
05/09/2026 11 PM PDT 9.02 64 0 Not Applicable
05/10/2026 12 AM PDT 9.02 64 0 Not Applicable
05/10/2026 01 AM PDT 9.02 64 0 Not Applicable
05/10/2026 02 AM PDT 9.02 64 0 Not Applicable
05/10/2026 03 AM PDT 9.02 64 0 Not Applicable
05/10/2026 04 AM PDT 9.02 64 0 Not Applicable
05/10/2026 05 AM PDT 9.02 64 0 Not Applicable
05/10/2026 06 AM PDT 9.02 64 0 Not Applicable
05/10/2026 07 AM PDT 9.02 64 0 Not Applicable
05/10/2026 08 AM PDT 9.02 64 0 Not Applicable
05/10/2026 09 AM PDT 9.02 64 0 Not Applicable
05/10/2026 10 AM PDT 9.01 63 - Not Applicable
05/10/2026 11 AM PDT 9.01 63 0 Not Applicable
05/10/2026 12 PM PDT 9.01 63 0 Not Applicable
05/10/2026 01 PM PDT 9.01 63 0 Not Applicable
05/10/2026 02 PM PDT 9.01 63 0 Not Applicable
05/10/2026 03 PM PDT 9.01 63 0 Not Applicable
05/10/2026 04 PM PDT 9.01 63 0 Not Applicable
05/10/2026 05 PM PDT 9.01 63 0 Not Applicable
05/10/2026 06 PM PDT 9.01 63 0 Not Applicable
05/10/2026 07 PM PDT 9.01 63 0 Not Applicable
05/10/2026 08 PM PDT 9.01 63 0 Not Applicable
05/10/2026 09 PM PDT 9.01 63 0 Not Applicable
05/10/2026 10 PM PDT 9.01 63 0 Not Applicable
05/10/2026 11 PM PDT 9.01 63 0 Not Applicable
05/11/2026 12 AM PDT 9.01 63 0 Not Applicable
05/11/2026 01 AM PDT 9.01 63 0 Not Applicable
05/11/2026 02 AM PDT 9.01 63 0 Not Applicable
05/11/2026 03 AM PDT 9.01 63 0 Not Applicable
05/11/2026 04 AM PDT 9.01 63 0 Not Applicable
05/11/2026 05 AM PDT 9.01 63 0 Not Applicable
05/11/2026 06 AM PDT 9.01 63 0 Not Applicable
05/11/2026 07 AM PDT 9.01 63 0 Not Applicable
05/11/2026 08 AM PDT 9.01 63 0 Not Applicable
05/11/2026 09 AM PDT 9.01 63 0 Not Applicable
05/11/2026 10 AM PDT 9.01 63 0 Not Applicable
05/11/2026 11 AM PDT 9.01 63 0 Not Applicable
05/11/2026 12 PM PDT 9.01 63 0 Not Applicable
05/11/2026 01 PM PDT 9.01 63 0 Not Applicable
05/11/2026 02 PM PDT 9.01 63 0 Not Applicable
05/11/2026 03 PM PDT 9.01 63 0 Not Applicable
05/11/2026 04 PM PDT 9.01 63 0 Not Applicable
05/11/2026 05 PM PDT 9.00 62 - Not Applicable
05/11/2026 06 PM PDT 9.00 62 0 Not Applicable
05/11/2026 07 PM PDT 9.00 62 0 Not Applicable
05/11/2026 08 PM PDT 9.00 62 0 Not Applicable
05/11/2026 09 PM PDT 9.00 62 0 Not Applicable
05/11/2026 10 PM PDT 9.00 62 0 Not Applicable
05/11/2026 11 PM PDT 9.00 62 0 Not Applicable
05/12/2026 12 AM PDT 9.00 62 0 Not Applicable
05/12/2026 01 AM PDT 9.00 62 0 Not Applicable
05/12/2026 02 AM PDT 9.00 62 0 Not Applicable
05/12/2026 03 AM PDT 9.00 62 0 Not Applicable
05/12/2026 04 AM PDT 9.00 62 0 Not Applicable
05/12/2026 05 AM PDT 9.00 62 0 Not Applicable
05/12/2026 06 AM PDT 9.00 62 0 Not Applicable
05/12/2026 07 AM PDT 9.00 62 0 Not Applicable
05/12/2026 08 AM PDT 9.00 62 0 Not Applicable
05/12/2026 09 AM PDT 9.00 62 0 Not Applicable
05/12/2026 10 AM PDT 9.00 62 0 Not Applicable
05/12/2026 11 AM PDT 9.00 62 0 Not Applicable
05/12/2026 12 PM PDT 9.00 62 0 Not Applicable
05/12/2026 01 PM PDT 9.00 62 0 Not Applicable
05/12/2026 02 PM PDT 9.00 62 0 Not Applicable
05/12/2026 03 PM PDT 9.00 62 0 Not Applicable
05/12/2026 04 PM PDT 8.99 61 - Not Applicable
05/12/2026 05 PM PDT 8.99 61 0 Not Applicable
05/12/2026 06 PM PDT 8.99 61 0 Not Applicable
05/12/2026 07 PM PDT 8.99 61 0 Not Applicable
05/12/2026 08 PM PDT 8.99 61 0 Not Applicable
05/12/2026 09 PM PDT 8.99 61 0 Not Applicable
05/12/2026 10 PM PDT 8.99 61 0 Not Applicable
05/12/2026 11 PM PDT 8.99 61 0 Not Applicable
05/13/2026 12 AM PDT 8.99 61 0 Not Applicable
05/13/2026 01 AM PDT 8.99 61 0 Not Applicable
05/13/2026 02 AM PDT 8.99 61 0 Not Applicable
05/13/2026 03 AM PDT 8.99 61 0 Not Applicable
05/13/2026 04 AM PDT 8.99 61 0 Not Applicable
05/13/2026 05 AM PDT 8.99 61 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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