National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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MATTOLE RIVER - ETTERSBURG (ETTC1)
Latitude: 40.14º NLongitude: 123.99º WElevation: 579 FeetForecast Type: Unofficial Location
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Mar 18 2026 at 12:50 PM PDTNext 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.