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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 03 2026 at 8:48 AM PDT | Next Issuance: | May 04 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: 05/03/2026 at 08:50 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/28/2026 at 06:00 PM PDT
# Maximum Observed Stage: 9.24 Feet
# Maximum Observed Flow: 89 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/03/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 9.12 Feet
# Maximum Forecast Flow: 76 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/28/2026 08 AM PDT 9.24 89 Not Applicable
04/28/2026 09 AM PDT 9.24 89 0 Not Applicable
04/28/2026 10 AM PDT 9.24 89 0 Not Applicable
04/28/2026 11 AM PDT 9.24 89 0 Not Applicable
04/28/2026 12 PM PDT 9.24 89 0 Not Applicable
04/28/2026 01 PM PDT 9.24 89 0 Not Applicable
04/28/2026 02 PM PDT 9.24 89 0 Not Applicable
04/28/2026 03 PM PDT 9.24 89 0 Not Applicable
04/28/2026 04 PM PDT 9.24 89 0 Not Applicable
04/28/2026 05 PM PDT 9.24 89 0 Not Applicable
04/28/2026 06 PM PDT 9.24 89 0 Not Applicable
04/28/2026 07 PM PDT 9.23 88 - Not Applicable
04/28/2026 08 PM PDT 9.23 88 0 Not Applicable
04/28/2026 09 PM PDT 9.23 88 0 Not Applicable
04/28/2026 10 PM PDT 9.22 87 - Not Applicable
04/28/2026 11 PM PDT 9.22 87 0 Not Applicable
04/29/2026 12 AM PDT 9.22 87 0 Not Applicable
04/29/2026 01 AM PDT 9.22 87 0 Not Applicable
04/29/2026 02 AM PDT 9.22 87 0 Not Applicable
04/29/2026 03 AM PDT 9.22 87 0 Not Applicable
04/29/2026 04 AM PDT 9.21 86 - Not Applicable
04/29/2026 05 AM PDT 9.21 86 0 Not Applicable
04/29/2026 06 AM PDT 9.21 86 0 Not Applicable
04/29/2026 07 AM PDT 9.21 86 0 Not Applicable
04/29/2026 08 AM PDT 9.21 86 0 Not Applicable
04/29/2026 09 AM PDT 9.21 86 0 Not Applicable
04/29/2026 10 AM PDT 9.21 86 0 Not Applicable
04/29/2026 11 AM PDT 9.21 86 0 Not Applicable
04/29/2026 12 PM PDT 9.21 86 0 Not Applicable
04/29/2026 01 PM PDT 9.21 86 0 Not Applicable
04/29/2026 02 PM PDT 9.21 86 0 Not Applicable
04/29/2026 03 PM PDT 9.20 84 - Not Applicable
04/29/2026 04 PM PDT 9.21 86 + Not Applicable
04/29/2026 05 PM PDT 9.21 86 0 Not Applicable
04/29/2026 06 PM PDT 9.21 86 0 Not Applicable
04/29/2026 07 PM PDT 9.20 84 - Not Applicable
04/29/2026 08 PM PDT 9.20 84 0 Not Applicable
04/29/2026 09 PM PDT 9.19 83 - Not Applicable
04/29/2026 10 PM PDT 9.20 84 + Not Applicable
04/29/2026 11 PM PDT 9.19 83 - Not Applicable
04/30/2026 12 AM PDT 9.19 83 0 Not Applicable
04/30/2026 01 AM PDT 9.19 83 0 Not Applicable
04/30/2026 02 AM PDT 9.19 83 0 Not Applicable
04/30/2026 03 AM PDT 9.18 82 - Not Applicable
04/30/2026 04 AM PDT 9.18 82 0 Not Applicable
04/30/2026 05 AM PDT 9.18 82 0 Not Applicable
04/30/2026 06 AM PDT 9.18 82 0 Not Applicable
04/30/2026 07 AM PDT 9.18 82 0 Not Applicable
04/30/2026 08 AM PDT 9.18 82 0 Not Applicable
04/30/2026 09 AM PDT 9.18 82 0 Not Applicable
04/30/2026 10 AM PDT 9.18 82 0 Not Applicable
04/30/2026 11 AM PDT 9.19 83 + Not Applicable
04/30/2026 12 PM PDT 9.19 83 0 Not Applicable
04/30/2026 01 PM PDT 9.18 82 - Not Applicable
04/30/2026 02 PM PDT 9.19 83 + Not Applicable
04/30/2026 03 PM PDT 9.18 82 - Not Applicable
04/30/2026 04 PM PDT 9.19 83 + Not Applicable
04/30/2026 05 PM PDT 9.18 82 - Not Applicable
04/30/2026 06 PM PDT 9.18 82 0 Not Applicable
04/30/2026 07 PM PDT 9.18 82 0 Not Applicable
04/30/2026 08 PM PDT 9.18 82 0 Not Applicable
04/30/2026 09 PM PDT 9.17 81 - Not Applicable
04/30/2026 10 PM PDT 9.17 81 0 Not Applicable
04/30/2026 11 PM PDT 9.17 81 0 Not Applicable
05/01/2026 12 AM PDT 9.17 81 0 Not Applicable
05/01/2026 01 AM PDT 9.16 80 - Not Applicable
05/01/2026 02 AM PDT 9.17 81 + Not Applicable
05/01/2026 03 AM PDT 9.16 80 - Not Applicable
05/01/2026 04 AM PDT 9.16 80 0 Not Applicable
05/01/2026 05 AM PDT 9.16 80 0 Not Applicable
05/01/2026 06 AM PDT 9.16 80 0 Not Applicable
05/01/2026 07 AM PDT 9.16 80 0 Not Applicable
05/01/2026 08 AM PDT 9.16 80 0 Not Applicable
05/01/2026 09 AM PDT 9.16 80 0 Not Applicable
05/01/2026 10 AM PDT 9.16 80 0 Not Applicable
05/01/2026 11 AM PDT 9.16 80 0 Not Applicable
05/01/2026 12 PM PDT 9.16 80 0 Not Applicable
05/01/2026 01 PM PDT 9.16 80 0 Not Applicable
05/01/2026 02 PM PDT 9.16 80 0 Not Applicable
05/01/2026 03 PM PDT 9.16 80 0 Not Applicable
05/01/2026 04 PM PDT 9.16 80 0 Not Applicable
05/01/2026 05 PM PDT 9.16 80 0 Not Applicable
05/01/2026 06 PM PDT 9.15 79 - Not Applicable
05/01/2026 07 PM PDT 9.16 80 + Not Applicable
05/01/2026 08 PM PDT 9.15 79 - Not Applicable
05/01/2026 09 PM PDT 9.15 79 0 Not Applicable
05/01/2026 10 PM PDT 9.15 79 0 Not Applicable
05/01/2026 11 PM PDT 9.15 79 0 Not Applicable
05/02/2026 12 AM PDT 9.15 79 0 Not Applicable
05/02/2026 01 AM PDT 9.14 79 - Not Applicable
05/02/2026 02 AM PDT 9.15 79 + Not Applicable
05/02/2026 03 AM PDT 9.15 79 0 Not Applicable
05/02/2026 04 AM PDT 9.14 79 - Not Applicable
05/02/2026 05 AM PDT 9.14 79 0 Not Applicable
05/02/2026 06 AM PDT 9.14 79 0 Not Applicable
05/02/2026 07 AM PDT 9.14 79 0 Not Applicable
05/02/2026 08 AM PDT 9.14 79 0 Not Applicable
05/02/2026 09 AM PDT 9.14 79 0 Not Applicable
05/02/2026 10 AM PDT 9.14 79 0 Not Applicable
05/02/2026 11 AM PDT 9.14 79 0 Not Applicable
05/02/2026 12 PM PDT 9.14 79 0 Not Applicable
05/02/2026 01 PM PDT 9.14 79 0 Not Applicable
05/02/2026 02 PM PDT 9.14 79 0 Not Applicable
05/02/2026 03 PM PDT 9.14 79 0 Not Applicable
05/02/2026 04 PM PDT 9.14 79 0 Not Applicable
05/02/2026 05 PM PDT 9.13 78 - Not Applicable
05/02/2026 06 PM PDT 9.13 78 0 Not Applicable
05/02/2026 07 PM PDT 9.13 78 0 Not Applicable
05/02/2026 08 PM PDT 9.13 78 0 Not Applicable
05/02/2026 09 PM PDT 9.13 78 0 Not Applicable
05/02/2026 10 PM PDT 9.13 78 0 Not Applicable
05/02/2026 11 PM PDT 9.13 78 0 Not Applicable
05/03/2026 12 AM PDT 9.13 78 0 Not Applicable
05/03/2026 01 AM PDT 9.12 76 - Not Applicable
05/03/2026 02 AM PDT 9.12 76 0 Not Applicable
05/03/2026 03 AM PDT 9.12 76 0 Not Applicable
05/03/2026 04 AM PDT 9.12 76 0 Not Applicable
05/03/2026 05 AM PDT 9.12 76 0 Not Applicable
05/03/2026 06 AM PDT 9.12 76 0 Not Applicable
05/03/2026 07 AM PDT 9.12 76 0 Not Applicable
05/03/2026 08 AM PDT 9.12 76 0 Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/03/2026 09 AM PDT 9.12 76 Not Applicable
05/03/2026 10 AM PDT 9.12 76 0 Not Applicable
05/03/2026 11 AM PDT 9.12 76 0 Not Applicable
05/03/2026 12 PM PDT 9.12 76 0 Not Applicable
05/03/2026 01 PM PDT 9.11 75 - Not Applicable
05/03/2026 02 PM PDT 9.11 75 0 Not Applicable
05/03/2026 03 PM PDT 9.11 75 0 Not Applicable
05/03/2026 04 PM PDT 9.11 75 0 Not Applicable
05/03/2026 05 PM PDT 9.11 75 0 Not Applicable
05/03/2026 06 PM PDT 9.11 75 0 Not Applicable
05/03/2026 07 PM PDT 9.11 75 0 Not Applicable
05/03/2026 08 PM PDT 9.11 75 0 Not Applicable
05/03/2026 09 PM PDT 9.11 75 0 Not Applicable
05/03/2026 10 PM PDT 9.11 75 0 Not Applicable
05/03/2026 11 PM PDT 9.11 75 0 Not Applicable
05/04/2026 12 AM PDT 9.11 75 0 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 9.11 75 0 Not Applicable
05/04/2026 08 AM PDT 9.10 74 - Not Applicable
05/04/2026 09 AM PDT 9.10 74 0 Not Applicable
05/04/2026 10 AM PDT 9.10 74 0 Not Applicable
05/04/2026 11 AM PDT 9.10 74 0 Not Applicable
05/04/2026 12 PM PDT 9.10 74 0 Not Applicable
05/04/2026 01 PM PDT 9.10 74 0 Not Applicable
05/04/2026 02 PM PDT 9.10 74 0 Not Applicable
05/04/2026 03 PM PDT 9.10 74 0 Not Applicable
05/04/2026 04 PM PDT 9.10 74 0 Not Applicable
05/04/2026 05 PM PDT 9.10 74 0 Not Applicable
05/04/2026 06 PM PDT 9.10 74 0 Not Applicable
05/04/2026 07 PM PDT 9.10 74 0 Not Applicable
05/04/2026 08 PM PDT 9.10 74 0 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 9.09 72 - Not Applicable
05/05/2026 07 AM PDT 9.09 72 0 Not Applicable
05/05/2026 08 AM PDT 9.09 72 0 Not Applicable
05/05/2026 09 AM PDT 9.09 72 0 Not Applicable
05/05/2026 10 AM PDT 9.09 72 0 Not Applicable
05/05/2026 11 AM PDT 9.08 71 - Not Applicable
05/05/2026 12 PM PDT 9.08 71 0 Not Applicable
05/05/2026 01 PM PDT 9.08 71 0 Not Applicable
05/05/2026 02 PM PDT 9.08 71 0 Not Applicable
05/05/2026 03 PM PDT 9.08 71 0 Not Applicable
05/05/2026 04 PM PDT 9.08 71 0 Not Applicable
05/05/2026 05 PM PDT 9.08 71 0 Not Applicable
05/05/2026 06 PM PDT 9.07 70 - Not Applicable
05/05/2026 07 PM PDT 9.07 70 0 Not Applicable
05/05/2026 08 PM PDT 9.07 70 0 Not Applicable
05/05/2026 09 PM PDT 9.07 70 0 Not Applicable
05/05/2026 10 PM PDT 9.07 70 0 Not Applicable
05/05/2026 11 PM PDT 9.07 70 0 Not Applicable
05/06/2026 12 AM PDT 9.07 70 0 Not Applicable
05/06/2026 01 AM PDT 9.07 70 0 Not Applicable
05/06/2026 02 AM PDT 9.07 70 0 Not Applicable
05/06/2026 03 AM PDT 9.07 70 0 Not Applicable
05/06/2026 04 AM PDT 9.07 70 0 Not Applicable
05/06/2026 05 AM PDT 9.07 70 0 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 9.06 69 - Not Applicable
05/06/2026 09 AM PDT 9.06 69 0 Not Applicable
05/06/2026 10 AM PDT 9.06 69 0 Not Applicable
05/06/2026 11 AM PDT 9.06 69 0 Not Applicable
05/06/2026 12 PM PDT 9.06 69 0 Not Applicable
05/06/2026 01 PM PDT 9.06 69 0 Not Applicable
05/06/2026 02 PM PDT 9.06 69 0 Not Applicable
05/06/2026 03 PM PDT 9.06 69 0 Not Applicable
05/06/2026 04 PM PDT 9.06 69 0 Not Applicable
05/06/2026 05 PM PDT 9.06 69 0 Not Applicable
05/06/2026 06 PM PDT 9.06 69 0 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 9.05 68 - Not Applicable
05/07/2026 02 AM PDT 9.05 68 0 Not Applicable
05/07/2026 03 AM PDT 9.05 68 0 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 9.05 68 0 Not Applicable
05/07/2026 12 PM PDT 9.05 68 0 Not Applicable
05/07/2026 01 PM PDT 9.05 68 0 Not Applicable
05/07/2026 02 PM PDT 9.05 68 0 Not Applicable
05/07/2026 03 PM PDT 9.05 68 0 Not Applicable
05/07/2026 04 PM PDT 9.05 68 0 Not Applicable
05/07/2026 05 PM PDT 9.05 68 0 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 9.05 68 0 Not Applicable
05/07/2026 09 PM PDT 9.04 67 - 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 9.04 67 0 Not Applicable
05/08/2026 02 AM PDT 9.04 67 0 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 9.04 67 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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