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 09 2026 at 12:34 PM PDTNext Issuance: Mar 10 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:  03/09/2026 at 12:36 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/04/2026 at 11:00 AM PST
# Maximum Observed Stage:                       10.64 Feet
# Maximum Observed Flow:                        325 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/09/2026 at 01:00 PM PDT
# Maximum Forecast Stage:                       9.95 Feet
# Maximum Forecast Flow:                        185 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/04/2026 11 AM PST           10.64            325                Not Applicable
  03/04/2026 12 PM PST           10.62            320         -      Not Applicable
  03/04/2026 01 PM PST           10.60            316         -      Not Applicable
  03/04/2026 02 PM PST           10.59            314         -      Not Applicable
  03/04/2026 03 PM PST           10.58            311         -      Not Applicable
  03/04/2026 04 PM PST           10.56            307         -      Not Applicable
  03/04/2026 05 PM PST           10.54            303         -      Not Applicable
  03/04/2026 06 PM PST           10.54            303         0      Not Applicable
  03/04/2026 07 PM PST           10.53            300         -      Not Applicable
  03/04/2026 08 PM PST           10.52            298         -      Not Applicable
  03/04/2026 09 PM PST           10.51            296         -      Not Applicable
  03/04/2026 10 PM PST           10.50            294         -      Not Applicable
  03/04/2026 11 PM PST           10.50            294         0      Not Applicable
  03/05/2026 12 AM PST           10.49            292         -      Not Applicable
  03/05/2026 01 AM PST           10.48            290         -      Not Applicable
  03/05/2026 02 AM PST           10.47            287         -      Not Applicable
  03/05/2026 03 AM PST           10.47            287         0      Not Applicable
  03/05/2026 04 AM PST           10.45            283         -      Not Applicable
  03/05/2026 05 AM PST           10.44            281         -      Not Applicable
  03/05/2026 06 AM PST           10.45            283         +      Not Applicable
  03/05/2026 07 AM PST           10.43            279         -      Not Applicable
  03/05/2026 08 AM PST           10.44            281         +      Not Applicable
  03/05/2026 09 AM PST           10.42            277         -      Not Applicable
  03/05/2026 10 AM PST           10.41            275         -      Not Applicable
  03/05/2026 11 AM PST           10.42            277         +      Not Applicable
  03/05/2026 12 PM PST           10.40            273         -      Not Applicable
  03/05/2026 01 PM PST           10.39            270         -      Not Applicable
  03/05/2026 02 PM PST           10.39            270         0      Not Applicable
  03/05/2026 03 PM PST           10.38            268         -      Not Applicable
  03/05/2026 04 PM PST           10.37            266         -      Not Applicable
  03/05/2026 05 PM PST           10.37            266         0      Not Applicable
  03/05/2026 06 PM PST           10.36            264         -      Not Applicable
  03/05/2026 07 PM PST           10.35            262         -      Not Applicable
  03/05/2026 08 PM PST           10.34            260         -      Not Applicable
  03/05/2026 09 PM PST           10.35            262         +      Not Applicable
  03/05/2026 10 PM PST           10.33            258         -      Not Applicable
  03/05/2026 11 PM PST           10.33            258         0      Not Applicable
  03/06/2026 12 AM PST           10.33            258         0      Not Applicable
  03/06/2026 01 AM PST           10.32            256         -      Not Applicable
  03/06/2026 02 AM PST           10.32            256         0      Not Applicable
  03/06/2026 03 AM PST           10.31            254         -      Not Applicable
  03/06/2026 04 AM PST           10.30            252         -      Not Applicable
  03/06/2026 05 AM PST           10.29            250         -      Not Applicable
  03/06/2026 06 AM PST           10.29            250         0      Not Applicable
  03/06/2026 07 AM PST           10.29            250         0      Not Applicable
  03/06/2026 08 AM PST           10.28            248         -      Not Applicable
  03/06/2026 09 AM PST           10.28            248         0      Not Applicable
  03/06/2026 10 AM PST           10.28            248         0      Not Applicable
  03/06/2026 11 AM PST           10.26            244         -      Not Applicable
  03/06/2026 12 PM PST           10.26            244         0      Not Applicable
  03/06/2026 01 PM PST           10.26            244         0      Not Applicable
  03/06/2026 02 PM PST           10.25            242         -      Not Applicable
  03/06/2026 03 PM PST           10.25            242         0      Not Applicable
  03/06/2026 04 PM PST           10.24            240         -      Not Applicable
  03/06/2026 05 PM PST           10.23            238         -      Not Applicable
  03/06/2026 06 PM PST           10.24            240         +      Not Applicable
  03/06/2026 07 PM PST           10.23            238         -      Not Applicable
  03/06/2026 08 PM PST           10.22            236         -      Not Applicable
  03/06/2026 09 PM PST           10.20            232         -      Not Applicable
  03/06/2026 10 PM PST           10.21            234         +      Not Applicable
  03/06/2026 11 PM PST           10.20            232         -      Not Applicable
  03/07/2026 12 AM PST           10.20            232         0      Not Applicable
  03/07/2026 01 AM PST           10.19            230         -      Not Applicable
  03/07/2026 02 AM PST           10.19            230         0      Not Applicable
  03/07/2026 03 AM PST           10.18            228         -      Not Applicable
  03/07/2026 04 AM PST           10.17            226         -      Not Applicable
  03/07/2026 05 AM PST           10.18            228         +      Not Applicable
  03/07/2026 06 AM PST           10.16            224         -      Not Applicable
  03/07/2026 07 AM PST           10.16            224         0      Not Applicable
  03/07/2026 08 AM PST           10.15            222         -      Not Applicable
  03/07/2026 09 AM PST           10.15            222         0      Not Applicable
  03/07/2026 10 AM PST           10.16            224         +      Not Applicable
  03/07/2026 11 AM PST           10.15            222         -      Not Applicable
  03/07/2026 12 PM PST           10.15            222         0      Not Applicable
  03/07/2026 01 PM PST           10.15            222         0      Not Applicable
  03/07/2026 02 PM PST           10.14            220         -      Not Applicable
  03/07/2026 03 PM PST           10.13            218         -      Not Applicable
  03/07/2026 04 PM PST           10.13            218         0      Not Applicable
  03/07/2026 05 PM PST           10.12            217         -      Not Applicable
  03/07/2026 06 PM PST           10.12            217         0      Not Applicable
  03/07/2026 07 PM PST           10.11            215         -      Not Applicable
  03/07/2026 08 PM PST           10.12            217         +      Not Applicable
  03/07/2026 09 PM PST           10.10            213         -      Not Applicable
  03/07/2026 10 PM PST           10.10            213         0      Not Applicable
  03/07/2026 11 PM PST           10.09            211         -      Not Applicable
  03/08/2026 12 AM PST           10.09            211         0      Not Applicable
  03/08/2026 01 AM PST           10.09            211         0      Not Applicable
  03/08/2026 03 AM PDT           10.08            209         -      Not Applicable
  03/08/2026 04 AM PDT           10.07            207         -      Not Applicable
  03/08/2026 05 AM PDT           10.07            207         0      Not Applicable
  03/08/2026 06 AM PDT           10.07            207         0      Not Applicable
  03/08/2026 07 AM PDT           10.07            207         0      Not Applicable
  03/08/2026 08 AM PDT           10.06            205         -      Not Applicable
  03/08/2026 09 AM PDT           10.06            205         0      Not Applicable
  03/08/2026 10 AM PDT           10.06            205         0      Not Applicable
  03/08/2026 11 AM PDT           10.06            205         0      Not Applicable
  03/08/2026 12 PM PDT           10.04            202         -      Not Applicable
  03/08/2026 01 PM PDT           10.06            205         +      Not Applicable
  03/08/2026 02 PM PDT           10.04            202         -      Not Applicable
  03/08/2026 03 PM PDT           10.05            203         +      Not Applicable
  03/08/2026 04 PM PDT           10.04            202         -      Not Applicable
  03/08/2026 05 PM PDT           10.04            202         0      Not Applicable
  03/08/2026 06 PM PDT           10.03            200         -      Not Applicable
  03/08/2026 07 PM PDT           10.02            198         -      Not Applicable
  03/08/2026 08 PM PDT           10.03            200         +      Not Applicable
  03/08/2026 09 PM PDT           10.02            198         -      Not Applicable
  03/08/2026 10 PM PDT           10.01            196         -      Not Applicable
  03/08/2026 11 PM PDT           10.01            196         0      Not Applicable
  03/09/2026 12 AM PDT           10.00            194         -      Not Applicable
  03/09/2026 01 AM PDT            9.99            193         -      Not Applicable
  03/09/2026 02 AM PDT            9.99            193         0      Not Applicable
  03/09/2026 03 AM PDT            9.99            193         0      Not Applicable
  03/09/2026 04 AM PDT            9.99            193         0      Not Applicable
  03/09/2026 05 AM PDT            9.98            191         -      Not Applicable
  03/09/2026 06 AM PDT            9.98            191         0      Not Applicable
  03/09/2026 07 AM PDT            9.98            191         0      Not Applicable
  03/09/2026 08 AM PDT            9.97            189         -      Not Applicable
  03/09/2026 09 AM PDT            9.97            189         0      Not Applicable
  03/09/2026 10 AM PDT            9.95            185         -      Not Applicable
  03/09/2026 11 AM PDT            9.96            187         +      Not Applicable
  03/09/2026 12 PM PDT            9.96            187         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/09/2026 01 PM PDT            9.95            185                Not Applicable
  03/09/2026 02 PM PDT            9.95            185         0      Not Applicable
  03/09/2026 03 PM PDT            9.94            184         -      Not Applicable
  03/09/2026 04 PM PDT            9.94            184         0      Not Applicable
  03/09/2026 05 PM PDT            9.93            182         -      Not Applicable
  03/09/2026 06 PM PDT            9.93            182         0      Not Applicable
  03/09/2026 07 PM PDT            9.92            180         -      Not Applicable
  03/09/2026 08 PM PDT            9.92            180         0      Not Applicable
  03/09/2026 09 PM PDT            9.91            178         -      Not Applicable
  03/09/2026 10 PM PDT            9.91            178         0      Not Applicable
  03/09/2026 11 PM PDT            9.90            177         -      Not Applicable
  03/10/2026 12 AM PDT            9.90            177         0      Not Applicable
  03/10/2026 01 AM PDT            9.89            175         -      Not Applicable
  03/10/2026 02 AM PDT            9.89            175         0      Not Applicable
  03/10/2026 03 AM PDT            9.88            173         -      Not Applicable
  03/10/2026 04 AM PDT            9.88            173         0      Not Applicable
  03/10/2026 05 AM PDT            9.88            173         0      Not Applicable
  03/10/2026 06 AM PDT            9.87            171         -      Not Applicable
  03/10/2026 07 AM PDT            9.87            171         0      Not Applicable
  03/10/2026 08 AM PDT            9.86            170         -      Not Applicable
  03/10/2026 09 AM PDT            9.86            170         0      Not Applicable
  03/10/2026 10 AM PDT            9.85            168         -      Not Applicable
  03/10/2026 11 AM PDT            9.85            168         0      Not Applicable
  03/10/2026 12 PM PDT            9.85            168         0      Not Applicable
  03/10/2026 01 PM PDT            9.84            166         -      Not Applicable
  03/10/2026 02 PM PDT            9.84            166         0      Not Applicable
  03/10/2026 03 PM PDT            9.83            165         -      Not Applicable
  03/10/2026 04 PM PDT            9.83            165         0      Not Applicable
  03/10/2026 05 PM PDT            9.83            165         0      Not Applicable
  03/10/2026 06 PM PDT            9.82            163         -      Not Applicable
  03/10/2026 07 PM PDT            9.82            163         0      Not Applicable
  03/10/2026 08 PM PDT            9.81            161         -      Not Applicable
  03/10/2026 09 PM PDT            9.81            161         0      Not Applicable
  03/10/2026 10 PM PDT            9.81            161         0      Not Applicable
  03/10/2026 11 PM PDT            9.80            160         -      Not Applicable
  03/11/2026 12 AM PDT            9.80            160         0      Not Applicable
  03/11/2026 01 AM PDT            9.80            160         0      Not Applicable
  03/11/2026 02 AM PDT            9.79            158         -      Not Applicable
  03/11/2026 03 AM PDT            9.79            158         0      Not Applicable
  03/11/2026 04 AM PDT            9.79            158         0      Not Applicable
  03/11/2026 05 AM PDT            9.78            156         -      Not Applicable
  03/11/2026 06 AM PDT            9.78            156         0      Not Applicable
  03/11/2026 07 AM PDT            9.78            156         0      Not Applicable
  03/11/2026 08 AM PDT            9.77            155         -      Not Applicable
  03/11/2026 09 AM PDT            9.77            155         0      Not Applicable
  03/11/2026 10 AM PDT            9.77            155         0      Not Applicable
  03/11/2026 11 AM PDT            9.76            153         -      Not Applicable
  03/11/2026 12 PM PDT            9.76            153         0      Not Applicable
  03/11/2026 01 PM PDT            9.76            153         0      Not Applicable
  03/11/2026 02 PM PDT            9.75            151         -      Not Applicable
  03/11/2026 03 PM PDT            9.75            151         0      Not Applicable
  03/11/2026 04 PM PDT            9.75            151         0      Not Applicable
  03/11/2026 05 PM PDT            9.74            150         -      Not Applicable
  03/11/2026 06 PM PDT            9.74            150         0      Not Applicable
  03/11/2026 07 PM PDT            9.74            150         0      Not Applicable
  03/11/2026 08 PM PDT            9.74            150         0      Not Applicable
  03/11/2026 09 PM PDT            9.73            148         -      Not Applicable
  03/11/2026 10 PM PDT            9.73            148         0      Not Applicable
  03/11/2026 11 PM PDT            9.73            148         0      Not Applicable
  03/12/2026 12 AM PDT            9.72            147         -      Not Applicable
  03/12/2026 01 AM PDT            9.72            147         0      Not Applicable
  03/12/2026 02 AM PDT            9.72            147         0      Not Applicable
  03/12/2026 03 AM PDT            9.72            147         0      Not Applicable
  03/12/2026 04 AM PDT            9.71            145         -      Not Applicable
  03/12/2026 05 AM PDT            9.71            145         0      Not Applicable
  03/12/2026 06 AM PDT            9.71            145         0      Not Applicable
  03/12/2026 07 AM PDT            9.71            145         0      Not Applicable
  03/12/2026 08 AM PDT            9.70            143         -      Not Applicable
  03/12/2026 09 AM PDT            9.70            143         0      Not Applicable
  03/12/2026 10 AM PDT            9.70            143         0      Not Applicable
  03/12/2026 11 AM PDT            9.70            143         0      Not Applicable
  03/12/2026 12 PM PDT            9.69            142         -      Not Applicable
  03/12/2026 01 PM PDT            9.69            142         0      Not Applicable
  03/12/2026 02 PM PDT            9.69            142         0      Not Applicable
  03/12/2026 03 PM PDT            9.69            142         0      Not Applicable
  03/12/2026 04 PM PDT            9.68            140         -      Not Applicable
  03/12/2026 05 PM PDT            9.68            140         0      Not Applicable
  03/12/2026 06 PM PDT            9.68            140         0      Not Applicable
  03/12/2026 07 PM PDT            9.68            140         0      Not Applicable
  03/12/2026 08 PM PDT            9.68            140         0      Not Applicable
  03/12/2026 09 PM PDT            9.67            139         -      Not Applicable
  03/12/2026 10 PM PDT            9.67            139         0      Not Applicable
  03/12/2026 11 PM PDT            9.67            139         0      Not Applicable
  03/13/2026 12 AM PDT            9.67            139         0      Not Applicable
  03/13/2026 01 AM PDT            9.66            137         -      Not Applicable
  03/13/2026 02 AM PDT            9.66            137         0      Not Applicable
  03/13/2026 03 AM PDT            9.66            137         0      Not Applicable
  03/13/2026 04 AM PDT            9.66            137         0      Not Applicable
  03/13/2026 05 AM PDT            9.66            137         0      Not Applicable
  03/13/2026 06 AM PDT            9.65            136         -      Not Applicable
  03/13/2026 07 AM PDT            9.65            136         0      Not Applicable
  03/13/2026 08 AM PDT            9.65            136         0      Not Applicable
  03/13/2026 09 AM PDT            9.65            136         0      Not Applicable
  03/13/2026 10 AM PDT            9.65            136         0      Not Applicable
  03/13/2026 11 AM PDT            9.64            134         -      Not Applicable
  03/13/2026 12 PM PDT            9.64            134         0      Not Applicable
  03/13/2026 01 PM PDT            9.64            134         0      Not Applicable
  03/13/2026 02 PM PDT            9.64            134         0      Not Applicable
  03/13/2026 03 PM PDT            9.64            134         0      Not Applicable
  03/13/2026 04 PM PDT            9.64            134         0      Not Applicable
  03/13/2026 05 PM PDT            9.63            132         -      Not Applicable
  03/13/2026 06 PM PDT            9.63            132         0      Not Applicable
  03/13/2026 07 PM PDT            9.63            132         0      Not Applicable
  03/13/2026 08 PM PDT            9.63            132         0      Not Applicable
  03/13/2026 09 PM PDT            9.63            132         0      Not Applicable
  03/13/2026 10 PM PDT            9.63            132         0      Not Applicable
  03/13/2026 11 PM PDT            9.63            132         0      Not Applicable
  03/14/2026 12 AM PDT            9.62            131         -      Not Applicable
  03/14/2026 01 AM PDT            9.62            131         0      Not Applicable
  03/14/2026 02 AM PDT            9.62            131         0      Not Applicable
  03/14/2026 03 AM PDT            9.62            131         0      Not Applicable
  03/14/2026 04 AM PDT            9.62            131         0      Not Applicable
  03/14/2026 05 AM PDT            9.62            131         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.