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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: | Mar 18 2026 at 12:50 PM PDT | Next Issuance: | Mar 19 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: 03/18/2026 at 12:52 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 03/13/2026 at 02:00 PM PDT
# Maximum Observed Stage: 9.68 Feet
# Maximum Observed Flow: 140 cfs
#
# Earliest Date & Time of Maximum Forecast: 03/18/2026 at 01:00 PM PDT
# Maximum Forecast Stage: 9.44 Feet
# Maximum Forecast Flow: 98 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
03/13/2026 12 PM PDT 9.67 139 Not Applicable
03/13/2026 01 PM PDT 9.68 140 + Not Applicable
03/13/2026 02 PM PDT 9.68 140 0 Not Applicable
03/13/2026 03 PM PDT 9.67 139 - Not Applicable
03/13/2026 04 PM PDT 9.67 139 0 Not Applicable
03/13/2026 05 PM PDT 9.67 139 0 Not Applicable
03/13/2026 06 PM PDT 9.67 139 0 Not Applicable
03/13/2026 07 PM PDT 9.67 139 0 Not Applicable
03/13/2026 08 PM PDT 9.66 137 - Not Applicable
03/13/2026 09 PM PDT 9.65 136 - Not Applicable
03/13/2026 10 PM PDT 9.65 136 0 Not Applicable
03/13/2026 11 PM PDT 9.65 136 0 Not Applicable
03/14/2026 12 AM PDT 9.65 136 0 Not Applicable
03/14/2026 01 AM PDT 9.64 134 - Not Applicable
03/14/2026 02 AM PDT 9.64 134 0 Not Applicable
03/14/2026 03 AM PDT 9.64 134 0 Not Applicable
03/14/2026 04 AM PDT 9.64 134 0 Not Applicable
03/14/2026 05 AM PDT 9.63 132 - Not Applicable
03/14/2026 06 AM PDT 9.63 132 0 Not Applicable
03/14/2026 07 AM PDT 9.63 132 0 Not Applicable
03/14/2026 08 AM PDT 9.63 132 0 Not Applicable
03/14/2026 09 AM PDT 9.63 132 0 Not Applicable
03/14/2026 10 AM PDT 9.63 132 0 Not Applicable
03/14/2026 11 AM PDT 9.63 132 0 Not Applicable
03/14/2026 12 PM PDT 9.62 131 - Not Applicable
03/14/2026 01 PM PDT 9.62 131 0 Not Applicable
03/14/2026 02 PM PDT 9.62 131 0 Not Applicable
03/14/2026 03 PM PDT 9.63 132 + Not Applicable
03/14/2026 04 PM PDT 9.62 131 - Not Applicable
03/14/2026 05 PM PDT 9.62 131 0 Not Applicable
03/14/2026 06 PM PDT 9.62 131 0 Not Applicable
03/14/2026 07 PM PDT 9.61 129 - Not Applicable
03/14/2026 08 PM PDT 9.61 129 0 Not Applicable
03/14/2026 09 PM PDT 9.60 128 - Not Applicable
03/14/2026 10 PM PDT 9.60 128 0 Not Applicable
03/14/2026 11 PM PDT 9.60 128 0 Not Applicable
03/15/2026 12 AM PDT 9.60 128 0 Not Applicable
03/15/2026 01 AM PDT 9.60 128 0 Not Applicable
03/15/2026 02 AM PDT 9.58 124 - Not Applicable
03/15/2026 03 AM PDT 9.58 124 0 Not Applicable
03/15/2026 04 AM PDT 9.58 124 0 Not Applicable
03/15/2026 05 AM PDT 9.58 124 0 Not Applicable
03/15/2026 06 AM PDT 9.58 124 0 Not Applicable
03/15/2026 07 AM PDT 9.58 124 0 Not Applicable
03/15/2026 08 AM PDT 9.58 124 0 Not Applicable
03/15/2026 09 AM PDT 9.57 122 - Not Applicable
03/15/2026 10 AM PDT 9.57 122 0 Not Applicable
03/15/2026 11 AM PDT 9.57 122 0 Not Applicable
03/15/2026 12 PM PDT 9.57 122 0 Not Applicable
03/15/2026 01 PM PDT 9.57 122 0 Not Applicable
03/15/2026 02 PM PDT 9.57 122 0 Not Applicable
03/15/2026 03 PM PDT 9.57 122 0 Not Applicable
03/15/2026 04 PM PDT 9.57 122 0 Not Applicable
03/15/2026 05 PM PDT 9.56 120 - Not Applicable
03/15/2026 06 PM PDT 9.57 122 + Not Applicable
03/15/2026 07 PM PDT 9.57 122 0 Not Applicable
03/15/2026 08 PM PDT 9.56 120 - Not Applicable
03/15/2026 09 PM PDT 9.56 120 0 Not Applicable
03/15/2026 10 PM PDT 9.55 118 - Not Applicable
03/15/2026 11 PM PDT 9.55 118 0 Not Applicable
03/16/2026 12 AM PDT 9.54 116 - Not Applicable
03/16/2026 01 AM PDT 9.54 116 0 Not Applicable
03/16/2026 02 AM PDT 9.54 116 0 Not Applicable
03/16/2026 03 AM PDT 9.53 114 - Not Applicable
03/16/2026 04 AM PDT 9.54 116 + Not Applicable
03/16/2026 05 AM PDT 9.53 114 - Not Applicable
03/16/2026 06 AM PDT 9.53 114 0 Not Applicable
03/16/2026 07 AM PDT 9.53 114 0 Not Applicable
03/16/2026 08 AM PDT 9.52 113 - Not Applicable
03/16/2026 09 AM PDT 9.52 113 0 Not Applicable
03/16/2026 10 AM PDT 9.53 114 + Not Applicable
03/16/2026 11 AM PDT 9.52 113 - Not Applicable
03/16/2026 12 PM PDT 9.52 113 0 Not Applicable
03/16/2026 01 PM PDT 9.53 114 + Not Applicable
03/16/2026 02 PM PDT 9.53 114 0 Not Applicable
03/16/2026 03 PM PDT 9.52 113 - Not Applicable
03/16/2026 04 PM PDT 9.52 113 0 Not Applicable
03/16/2026 05 PM PDT 9.53 114 + Not Applicable
03/16/2026 06 PM PDT 9.52 113 - Not Applicable
03/16/2026 07 PM PDT 9.52 113 0 Not Applicable
03/16/2026 08 PM PDT 9.52 113 0 Not Applicable
03/16/2026 09 PM PDT 9.52 113 0 Not Applicable
03/16/2026 10 PM PDT 9.51 111 - Not Applicable
03/16/2026 11 PM PDT 9.50 109 - Not Applicable
03/17/2026 12 AM PDT 9.50 109 0 Not Applicable
03/17/2026 01 AM PDT 9.50 109 0 Not Applicable
03/17/2026 02 AM PDT 9.50 109 0 Not Applicable
03/17/2026 03 AM PDT 9.50 109 0 Not Applicable
03/17/2026 04 AM PDT 9.49 107 - Not Applicable
03/17/2026 05 AM PDT 9.49 107 0 Not Applicable
03/17/2026 06 AM PDT 9.50 109 + Not Applicable
03/17/2026 07 AM PDT 9.48 105 - Not Applicable
03/17/2026 08 AM PDT 9.49 107 + Not Applicable
03/17/2026 09 AM PDT 9.49 107 0 Not Applicable
03/17/2026 10 AM PDT 9.49 107 0 Not Applicable
03/17/2026 11 AM PDT 9.49 107 0 Not Applicable
03/17/2026 12 PM PDT 9.48 105 - Not Applicable
03/17/2026 01 PM PDT 9.49 107 + Not Applicable
03/17/2026 02 PM PDT 9.49 107 0 Not Applicable
03/17/2026 03 PM PDT 9.49 107 0 Not Applicable
03/17/2026 04 PM PDT 9.48 105 - Not Applicable
03/17/2026 05 PM PDT 9.49 107 + Not Applicable
03/17/2026 06 PM PDT 9.48 105 - Not Applicable
03/17/2026 07 PM PDT 9.48 105 0 Not Applicable
03/17/2026 08 PM PDT 9.48 105 0 Not Applicable
03/17/2026 09 PM PDT 9.47 104 - Not Applicable
03/17/2026 10 PM PDT 9.47 104 0 Not Applicable
03/17/2026 11 PM PDT 9.47 104 0 Not Applicable
03/18/2026 12 AM PDT 9.46 102 - Not Applicable
03/18/2026 01 AM PDT 9.46 102 0 Not Applicable
03/18/2026 02 AM PDT 9.46 102 0 Not Applicable
03/18/2026 03 AM PDT 9.46 102 0 Not Applicable
03/18/2026 04 AM PDT 9.46 102 0 Not Applicable
03/18/2026 05 AM PDT 9.45 100 - Not Applicable
03/18/2026 06 AM PDT 9.45 100 0 Not Applicable
03/18/2026 07 AM PDT 9.45 100 0 Not Applicable
03/18/2026 08 AM PDT 9.45 100 0 Not Applicable
03/18/2026 09 AM PDT 9.45 100 0 Not Applicable
03/18/2026 10 AM PDT 9.45 100 0 Not Applicable
03/18/2026 11 AM PDT 9.44 98 - Not Applicable
03/18/2026 12 PM PDT 9.44 98 0 Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
03/18/2026 01 PM PDT 9.44 98 Not Applicable
03/18/2026 02 PM PDT 9.44 98 0 Not Applicable
03/18/2026 03 PM PDT 9.44 98 0 Not Applicable
03/18/2026 04 PM PDT 9.44 98 0 Not Applicable
03/18/2026 05 PM PDT 9.44 98 0 Not Applicable
03/18/2026 06 PM PDT 9.43 97 - Not Applicable
03/18/2026 07 PM PDT 9.43 97 0 Not Applicable
03/18/2026 08 PM PDT 9.43 97 0 Not Applicable
03/18/2026 09 PM PDT 9.43 97 0 Not Applicable
03/18/2026 10 PM PDT 9.43 97 0 Not Applicable
03/18/2026 11 PM PDT 9.43 97 0 Not Applicable
03/19/2026 12 AM PDT 9.43 97 0 Not Applicable
03/19/2026 01 AM PDT 9.43 97 0 Not Applicable
03/19/2026 02 AM PDT 9.43 97 0 Not Applicable
03/19/2026 03 AM PDT 9.43 97 0 Not Applicable
03/19/2026 04 AM PDT 9.43 97 0 Not Applicable
03/19/2026 05 AM PDT 9.43 97 0 Not Applicable
03/19/2026 06 AM PDT 9.42 95 - Not Applicable
03/19/2026 07 AM PDT 9.42 95 0 Not Applicable
03/19/2026 08 AM PDT 9.42 95 0 Not Applicable
03/19/2026 09 AM PDT 9.42 95 0 Not Applicable
03/19/2026 10 AM PDT 9.42 95 0 Not Applicable
03/19/2026 11 AM PDT 9.42 95 0 Not Applicable
03/19/2026 12 PM PDT 9.42 95 0 Not Applicable
03/19/2026 01 PM PDT 9.42 95 0 Not Applicable
03/19/2026 02 PM PDT 9.42 95 0 Not Applicable
03/19/2026 03 PM PDT 9.42 95 0 Not Applicable
03/19/2026 04 PM PDT 9.42 95 0 Not Applicable
03/19/2026 05 PM PDT 9.42 95 0 Not Applicable
03/19/2026 06 PM PDT 9.41 94 - Not Applicable
03/19/2026 07 PM PDT 9.41 94 0 Not Applicable
03/19/2026 08 PM PDT 9.41 94 0 Not Applicable
03/19/2026 09 PM PDT 9.41 94 0 Not Applicable
03/19/2026 10 PM PDT 9.41 94 0 Not Applicable
03/19/2026 11 PM PDT 9.41 94 0 Not Applicable
03/20/2026 12 AM PDT 9.41 94 0 Not Applicable
03/20/2026 01 AM PDT 9.41 94 0 Not Applicable
03/20/2026 02 AM PDT 9.41 94 0 Not Applicable
03/20/2026 03 AM PDT 9.41 94 0 Not Applicable
03/20/2026 04 AM PDT 9.41 94 0 Not Applicable
03/20/2026 05 AM PDT 9.41 94 0 Not Applicable
03/20/2026 06 AM PDT 9.41 94 0 Not Applicable
03/20/2026 07 AM PDT 9.41 94 0 Not Applicable
03/20/2026 08 AM PDT 9.41 94 0 Not Applicable
03/20/2026 09 AM PDT 9.41 94 0 Not Applicable
03/20/2026 10 AM PDT 9.40 92 - Not Applicable
03/20/2026 11 AM PDT 9.40 92 0 Not Applicable
03/20/2026 12 PM PDT 9.40 92 0 Not Applicable
03/20/2026 01 PM PDT 9.40 92 0 Not Applicable
03/20/2026 02 PM PDT 9.40 92 0 Not Applicable
03/20/2026 03 PM PDT 9.40 92 0 Not Applicable
03/20/2026 04 PM PDT 9.40 92 0 Not Applicable
03/20/2026 05 PM PDT 9.40 92 0 Not Applicable
03/20/2026 06 PM PDT 9.40 92 0 Not Applicable
03/20/2026 07 PM PDT 9.40 92 0 Not Applicable
03/20/2026 08 PM PDT 9.40 92 0 Not Applicable
03/20/2026 09 PM PDT 9.40 92 0 Not Applicable
03/20/2026 10 PM PDT 9.40 92 0 Not Applicable
03/20/2026 11 PM PDT 9.40 92 0 Not Applicable
03/21/2026 12 AM PDT 9.40 92 0 Not Applicable
03/21/2026 01 AM PDT 9.40 92 0 Not Applicable
03/21/2026 02 AM PDT 9.40 92 0 Not Applicable
03/21/2026 03 AM PDT 9.40 92 0 Not Applicable
03/21/2026 04 AM PDT 9.39 91 - Not Applicable
03/21/2026 05 AM PDT 9.39 91 0 Not Applicable
03/21/2026 06 AM PDT 9.39 91 0 Not Applicable
03/21/2026 07 AM PDT 9.39 91 0 Not Applicable
03/21/2026 08 AM PDT 9.39 91 0 Not Applicable
03/21/2026 09 AM PDT 9.39 91 0 Not Applicable
03/21/2026 10 AM PDT 9.39 91 0 Not Applicable
03/21/2026 11 AM PDT 9.39 91 0 Not Applicable
03/21/2026 12 PM PDT 9.39 91 0 Not Applicable
03/21/2026 01 PM PDT 9.39 91 0 Not Applicable
03/21/2026 02 PM PDT 9.39 91 0 Not Applicable
03/21/2026 03 PM PDT 9.39 91 0 Not Applicable
03/21/2026 04 PM PDT 9.39 91 0 Not Applicable
03/21/2026 05 PM PDT 9.39 91 0 Not Applicable
03/21/2026 06 PM PDT 9.39 91 0 Not Applicable
03/21/2026 07 PM PDT 9.39 91 0 Not Applicable
03/21/2026 08 PM PDT 9.39 91 0 Not Applicable
03/21/2026 09 PM PDT 9.39 91 0 Not Applicable
03/21/2026 10 PM PDT 9.39 91 0 Not Applicable
03/21/2026 11 PM PDT 9.39 91 0 Not Applicable
03/22/2026 12 AM PDT 9.39 91 0 Not Applicable
03/22/2026 01 AM PDT 9.39 91 0 Not Applicable
03/22/2026 02 AM PDT 9.38 89 - Not Applicable
03/22/2026 03 AM PDT 9.38 89 0 Not Applicable
03/22/2026 04 AM PDT 9.38 89 0 Not Applicable
03/22/2026 05 AM PDT 9.38 89 0 Not Applicable
03/22/2026 06 AM PDT 9.38 89 0 Not Applicable
03/22/2026 07 AM PDT 9.38 89 0 Not Applicable
03/22/2026 08 AM PDT 9.38 89 0 Not Applicable
03/22/2026 09 AM PDT 9.38 89 0 Not Applicable
03/22/2026 10 AM PDT 9.38 89 0 Not Applicable
03/22/2026 11 AM PDT 9.38 89 0 Not Applicable
03/22/2026 12 PM PDT 9.38 89 0 Not Applicable
03/22/2026 01 PM PDT 9.38 89 0 Not Applicable
03/22/2026 02 PM PDT 9.38 89 0 Not Applicable
03/22/2026 03 PM PDT 9.38 89 0 Not Applicable
03/22/2026 04 PM PDT 9.38 89 0 Not Applicable
03/22/2026 05 PM PDT 9.38 89 0 Not Applicable
03/22/2026 06 PM PDT 9.38 89 0 Not Applicable
03/22/2026 07 PM PDT 9.38 89 0 Not Applicable
03/22/2026 08 PM PDT 9.38 89 0 Not Applicable
03/22/2026 09 PM PDT 9.38 89 0 Not Applicable
03/22/2026 10 PM PDT 9.38 89 0 Not Applicable
03/22/2026 11 PM PDT 9.38 89 0 Not Applicable
03/23/2026 12 AM PDT 9.38 89 0 Not Applicable
03/23/2026 01 AM PDT 9.38 89 0 Not Applicable
03/23/2026 02 AM PDT 9.38 89 0 Not Applicable
03/23/2026 03 AM PDT 9.38 89 0 Not Applicable
03/23/2026 04 AM PDT 9.38 89 0 Not Applicable
03/23/2026 05 AM PDT 9.38 89 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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