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 Feet
Location: Humboldt County in CaliforniaRiver Group: North Coast
Issuance Time: Mar 22 2023 at 2:24 PM PDTNext Issuance: Mar 23 2023 at 9:00 AM PDT
Monitor Stage: N/A Flood Stage: N/A

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Mattole River - Ettersburg (ETTC1)
#
# File Generation Time:  03/22/2023 at 02:25 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/17/2023 at 02:00 PM PDT
# Maximum Observed Stage:                       12.7 Feet
# Maximum Observed Flow:                        1128 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/22/2023 at 03:00 PM PDT
# Maximum Forecast Stage:                       11.1 Feet
# Maximum Forecast Flow:                        426 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/17/2023 02 PM PDT            12.7           1128                Not Applicable
  03/17/2023 03 PM PDT            12.7           1113         -      Not Applicable
  03/17/2023 04 PM PDT            12.7           1113         0      Not Applicable
  03/17/2023 05 PM PDT            12.6           1078         -      Not Applicable
  03/17/2023 06 PM PDT            12.6           1043         -      Not Applicable
  03/17/2023 07 PM PDT            12.6           1038         -      Not Applicable
  03/17/2023 08 PM PDT            12.5           1004         -      Not Applicable
  03/17/2023 09 PM PDT            12.5           1004         0      Not Applicable
  03/17/2023 10 PM PDT            12.4            975         -      Not Applicable
  03/17/2023 11 PM PDT            12.4            970         -      Not Applicable
  03/18/2023 12 AM PDT            12.5            994         +      Not Applicable
  03/18/2023 01 AM PDT            12.3            928         -      Not Applicable
  03/18/2023 02 AM PDT            12.3            937         +      Not Applicable
  03/18/2023 03 AM PDT            12.3            909         -      Not Applicable
  03/18/2023 04 AM PDT            12.2            895         -      Not Applicable
  03/18/2023 05 AM PDT            12.3            905         +      Not Applicable
  03/18/2023 06 AM PDT            12.3            933         +      Not Applicable
  03/18/2023 07 AM PDT            12.2            895         -      Not Applicable
  03/18/2023 08 AM PDT            12.3            900         +      Not Applicable
  03/18/2023 09 AM PDT            12.2            886         -      Not Applicable
  03/18/2023 10 AM PDT            12.2            882         -      Not Applicable
  03/18/2023 11 AM PDT            12.2            877         -      Not Applicable
  03/18/2023 12 PM PDT            12.2            873         -      Not Applicable
  03/18/2023 01 PM PDT            12.2            864         -      Not Applicable
  03/18/2023 02 PM PDT            12.1            814         -      Not Applicable
  03/18/2023 03 PM PDT            12.0            797         -      Not Applicable
  03/18/2023 04 PM PDT            12.0            797         0      Not Applicable
  03/18/2023 05 PM PDT            12.1            810         +      Not Applicable
  03/18/2023 06 PM PDT            11.9            736         -      Not Applicable
  03/18/2023 07 PM PDT            11.9            732         -      Not Applicable
  03/18/2023 08 PM PDT            11.8            720         -      Not Applicable
  03/18/2023 09 PM PDT            12.1            841         +      Not Applicable
  03/18/2023 10 PM PDT            12.0            792         -      Not Applicable
  03/18/2023 11 PM PDT            11.9            736         -      Not Applicable
  03/19/2023 12 AM PDT            11.9            745         +      Not Applicable
  03/19/2023 01 AM PDT            12.0            784         +      Not Applicable
  03/19/2023 02 AM PDT            11.9            724         -      Not Applicable
  03/19/2023 03 AM PDT            11.9            728         +      Not Applicable
  03/19/2023 04 AM PDT            11.9            732         +      Not Applicable
  03/19/2023 05 AM PDT            11.9            736         +      Not Applicable
  03/19/2023 06 AM PDT            11.9            749         +      Not Applicable
  03/19/2023 07 AM PDT            11.9            741         -      Not Applicable
  03/19/2023 08 AM PDT            11.9            732         -      Not Applicable
  03/19/2023 09 AM PDT            11.9            732         0      Not Applicable
  03/19/2023 10 AM PDT            11.8            720         -      Not Applicable
  03/19/2023 11 AM PDT            11.8            711         -      Not Applicable
  03/19/2023 12 PM PDT            11.8            707         -      Not Applicable
  03/19/2023 01 PM PDT            11.8            699         -      Not Applicable
  03/19/2023 02 PM PDT            11.8            691         -      Not Applicable
  03/19/2023 03 PM PDT            11.8            687         -      Not Applicable
  03/19/2023 04 PM PDT            11.8            678         -      Not Applicable
  03/19/2023 05 PM PDT            11.7            670         -      Not Applicable
  03/19/2023 06 PM PDT            11.7            674         +      Not Applicable
  03/19/2023 07 PM PDT            11.7            674         0      Not Applicable
  03/19/2023 08 PM PDT            11.7            666         -      Not Applicable
  03/19/2023 09 PM PDT            11.7            670         +      Not Applicable
  03/19/2023 10 PM PDT            11.7            670         0      Not Applicable
  03/19/2023 11 PM PDT            11.8            678         +      Not Applicable
  03/20/2023 12 AM PDT            11.7            666         -      Not Applicable
  03/20/2023 01 AM PDT            11.7            662         -      Not Applicable
  03/20/2023 02 AM PDT            11.7            658         -      Not Applicable
  03/20/2023 03 AM PDT            11.7            658         0      Not Applicable
  03/20/2023 04 AM PDT            11.7            646         -      Not Applicable
  03/20/2023 05 AM PDT            11.7            646         0      Not Applicable
  03/20/2023 06 AM PDT            11.7            642         -      Not Applicable
  03/20/2023 07 AM PDT            11.6            630         -      Not Applicable
  03/20/2023 08 AM PDT            11.6            626         -      Not Applicable
  03/20/2023 09 AM PDT            11.6            618         -      Not Applicable
  03/20/2023 10 AM PDT            11.6            614         -      Not Applicable
  03/20/2023 11 AM PDT            11.6            607         -      Not Applicable
  03/20/2023 12 PM PDT            11.6            611         +      Not Applicable
  03/20/2023 01 PM PDT            11.5            595         -      Not Applicable
  03/20/2023 02 PM PDT            11.5            595         0      Not Applicable
  03/20/2023 03 PM PDT            11.5            587         -      Not Applicable
  03/20/2023 04 PM PDT            11.5            584         -      Not Applicable
  03/20/2023 05 PM PDT            11.5            584         0      Not Applicable
  03/20/2023 06 PM PDT            11.5            572         -      Not Applicable
  03/20/2023 07 PM PDT            11.5            572         0      Not Applicable
  03/20/2023 08 PM PDT            11.5            568         -      Not Applicable
  03/20/2023 09 PM PDT            11.4            550         -      Not Applicable
  03/20/2023 10 PM PDT            11.4            550         0      Not Applicable
  03/20/2023 11 PM PDT            11.4            561         +      Not Applicable
  03/21/2023 12 AM PDT            11.4            550         -      Not Applicable
  03/21/2023 01 AM PDT            11.4            550         0      Not Applicable
  03/21/2023 02 AM PDT            11.4            542         -      Not Applicable
  03/21/2023 03 AM PDT            11.4            546         +      Not Applicable
  03/21/2023 04 AM PDT            11.4            546         0      Not Applicable
  03/21/2023 05 AM PDT            11.4            546         0      Not Applicable
  03/21/2023 06 AM PDT            11.3            524         -      Not Applicable
  03/21/2023 07 AM PDT            11.4            531         +      Not Applicable
  03/21/2023 08 AM PDT            11.3            517         -      Not Applicable
  03/21/2023 09 AM PDT            11.3            524         +      Not Applicable
  03/21/2023 10 AM PDT            11.3            524         0      Not Applicable
  03/21/2023 11 AM PDT            11.3            509         -      Not Applicable
  03/21/2023 12 PM PDT            11.3            499         -      Not Applicable
  03/21/2023 01 PM PDT            11.3            513         +      Not Applicable
  03/21/2023 02 PM PDT            11.3            509         -      Not Applicable
  03/21/2023 03 PM PDT            11.3            499         -      Not Applicable
  03/21/2023 04 PM PDT            11.3            499         0      Not Applicable
  03/21/2023 05 PM PDT            11.3            495         -      Not Applicable
  03/21/2023 06 PM PDT            11.3            499         +      Not Applicable
  03/21/2023 07 PM PDT            11.3            491         -      Not Applicable
  03/21/2023 08 PM PDT            11.2            484         -      Not Applicable
  03/21/2023 09 PM PDT            11.2            481         -      Not Applicable
  03/21/2023 10 PM PDT            11.2            484         +      Not Applicable
  03/21/2023 11 PM PDT            11.3            506         +      Not Applicable
  03/22/2023 12 AM PDT            11.2            477         -      Not Applicable
  03/22/2023 01 AM PDT            11.2            477         0      Not Applicable
  03/22/2023 02 AM PDT            11.2            481         +      Not Applicable
  03/22/2023 03 AM PDT            11.2            481         0      Not Applicable
  03/22/2023 04 AM PDT            11.2            470         -      Not Applicable
  03/22/2023 05 AM PDT            11.2            457         -      Not Applicable
  03/22/2023 06 AM PDT            11.2            457         0      Not Applicable
  03/22/2023 07 AM PDT            11.1            450         -      Not Applicable
  03/22/2023 08 AM PDT            11.1            446         -      Not Applicable
  03/22/2023 09 AM PDT            11.1            446         0      Not Applicable
  03/22/2023 10 AM PDT            11.1            443         -      Not Applicable
  03/22/2023 11 AM PDT            11.1            443         0      Not Applicable
  03/22/2023 12 PM PDT            11.1            436         -      Not Applicable
  03/22/2023 01 PM PDT            11.1            433         -      Not Applicable
  03/22/2023 02 PM PDT            11.1            430         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/22/2023 03 PM PDT            11.1            426                Not Applicable
  03/22/2023 04 PM PDT            11.1            423         -      Not Applicable
  03/22/2023 05 PM PDT            11.0            416         -      Not Applicable
  03/22/2023 06 PM PDT            11.0            413         -      Not Applicable
  03/22/2023 07 PM PDT            11.0            410         -      Not Applicable
  03/22/2023 08 PM PDT            11.0            406         -      Not Applicable
  03/22/2023 09 PM PDT            11.0            403         -      Not Applicable
  03/22/2023 10 PM PDT            11.0            400         -      Not Applicable
  03/22/2023 11 PM PDT            11.0            397         -      Not Applicable
  03/23/2023 12 AM PDT            11.0            393         -      Not Applicable
  03/23/2023 01 AM PDT            11.0            390         -      Not Applicable
  03/23/2023 02 AM PDT            10.9            387         -      Not Applicable
  03/23/2023 03 AM PDT            10.9            384         -      Not Applicable
  03/23/2023 04 AM PDT            10.9            381         -      Not Applicable
  03/23/2023 05 AM PDT            10.9            378         -      Not Applicable
  03/23/2023 06 AM PDT            10.9            374         -      Not Applicable
  03/23/2023 07 AM PDT            10.9            371         -      Not Applicable
  03/23/2023 08 AM PDT            10.9            368         -      Not Applicable
  03/23/2023 09 AM PDT            10.9            365         -      Not Applicable
  03/23/2023 10 AM PDT            10.9            362         -      Not Applicable
  03/23/2023 11 AM PDT            10.9            359         -      Not Applicable
  03/23/2023 12 PM PDT            10.8            356         -      Not Applicable
  03/23/2023 01 PM PDT            10.8            353         -      Not Applicable
  03/23/2023 02 PM PDT            10.8            350         -      Not Applicable
  03/23/2023 03 PM PDT            10.8            350         0      Not Applicable
  03/23/2023 04 PM PDT            10.8            347         -      Not Applicable
  03/23/2023 05 PM PDT            10.8            347         0      Not Applicable
  03/23/2023 06 PM PDT            10.8            343         -      Not Applicable
  03/23/2023 07 PM PDT            10.8            343         0      Not Applicable
  03/23/2023 08 PM PDT            10.8            340         -      Not Applicable
  03/23/2023 09 PM PDT            10.8            337         -      Not Applicable
  03/23/2023 10 PM PDT            10.8            337         0      Not Applicable
  03/23/2023 11 PM PDT            10.8            334         -      Not Applicable
  03/24/2023 12 AM PDT            10.8            331         -      Not Applicable
  03/24/2023 01 AM PDT            10.8            328         -      Not Applicable
  03/24/2023 02 AM PDT            10.8            325         -      Not Applicable
  03/24/2023 03 AM PDT            10.7            323         -      Not Applicable
  03/24/2023 04 AM PDT            10.7            320         -      Not Applicable
  03/24/2023 05 AM PDT            10.7            317         -      Not Applicable
  03/24/2023 06 AM PDT            10.7            314         -      Not Applicable
  03/24/2023 07 AM PDT            10.7            311         -      Not Applicable
  03/24/2023 08 AM PDT            10.7            311         0      Not Applicable
  03/24/2023 09 AM PDT            10.7            308         -      Not Applicable
  03/24/2023 10 AM PDT            10.7            305         -      Not Applicable
  03/24/2023 11 AM PDT            10.7            302         -      Not Applicable
  03/24/2023 12 PM PDT            10.7            299         -      Not Applicable
  03/24/2023 01 PM PDT            10.7            296         -      Not Applicable
  03/24/2023 02 PM PDT            10.6            294         -      Not Applicable
  03/24/2023 03 PM PDT            10.6            291         -      Not Applicable
  03/24/2023 04 PM PDT            10.6            291         0      Not Applicable
  03/24/2023 05 PM PDT            10.6            288         -      Not Applicable
  03/24/2023 06 PM PDT            10.6            285         -      Not Applicable
  03/24/2023 07 PM PDT            10.6            282         -      Not Applicable
  03/24/2023 08 PM PDT            10.6            282         0      Not Applicable
  03/24/2023 09 PM PDT            10.6            280         -      Not Applicable
  03/24/2023 10 PM PDT            10.6            277         -      Not Applicable
  03/24/2023 11 PM PDT            10.6            274         -      Not Applicable
  03/25/2023 12 AM PDT            10.6            274         0      Not Applicable
  03/25/2023 01 AM PDT            10.6            271         -      Not Applicable
  03/25/2023 02 AM PDT            10.6            269         -      Not Applicable
  03/25/2023 03 AM PDT            10.5            266         -      Not Applicable
  03/25/2023 04 AM PDT            10.5            263         -      Not Applicable
  03/25/2023 05 AM PDT            10.5            263         0      Not Applicable
  03/25/2023 06 AM PDT            10.5            261         -      Not Applicable
  03/25/2023 07 AM PDT            10.5            258         -      Not Applicable
  03/25/2023 08 AM PDT            10.5            258         0      Not Applicable
  03/25/2023 09 AM PDT            10.5            255         -      Not Applicable
  03/25/2023 10 AM PDT            10.5            253         -      Not Applicable
  03/25/2023 11 AM PDT            10.5            250         -      Not Applicable
  03/25/2023 12 PM PDT            10.5            250         0      Not Applicable
  03/25/2023 01 PM PDT            10.5            247         -      Not Applicable
  03/25/2023 02 PM PDT            10.5            245         -      Not Applicable
  03/25/2023 03 PM PDT            10.5            245         0      Not Applicable
  03/25/2023 04 PM PDT            10.4            242         -      Not Applicable
  03/25/2023 05 PM PDT            10.4            239         -      Not Applicable
  03/25/2023 06 PM PDT            10.4            239         0      Not Applicable
  03/25/2023 07 PM PDT            10.4            237         -      Not Applicable
  03/25/2023 08 PM PDT            10.4            234         -      Not Applicable
  03/25/2023 09 PM PDT            10.4            234         0      Not Applicable
  03/25/2023 10 PM PDT            10.4            232         -      Not Applicable
  03/25/2023 11 PM PDT            10.4            229         -      Not Applicable
  03/26/2023 12 AM PDT            10.4            229         0      Not Applicable
  03/26/2023 01 AM PDT            10.4            227         -      Not Applicable
  03/26/2023 02 AM PDT            10.4            227         0      Not Applicable
  03/26/2023 03 AM PDT            10.4            224         -      Not Applicable
  03/26/2023 04 AM PDT            10.4            222         -      Not Applicable
  03/26/2023 05 AM PDT            10.4            222         0      Not Applicable
  03/26/2023 06 AM PDT            10.4            219         -      Not Applicable
  03/26/2023 07 AM PDT            10.4            219         0      Not Applicable
  03/26/2023 08 AM PDT            10.3            217         -      Not Applicable
  03/26/2023 09 AM PDT            10.3            217         0      Not Applicable
  03/26/2023 10 AM PDT            10.3            214         -      Not Applicable
  03/26/2023 11 AM PDT            10.3            212         -      Not Applicable
  03/26/2023 12 PM PDT            10.3            212         0      Not Applicable
  03/26/2023 01 PM PDT            10.3            209         -      Not Applicable
  03/26/2023 02 PM PDT            10.3            209         0      Not Applicable
  03/26/2023 03 PM PDT            10.3            207         -      Not Applicable
  03/26/2023 04 PM PDT            10.3            207         0      Not Applicable
  03/26/2023 05 PM PDT            10.3            204         -      Not Applicable
  03/26/2023 06 PM PDT            10.3            204         0      Not Applicable
  03/26/2023 07 PM PDT            10.3            202         -      Not Applicable
  03/26/2023 08 PM PDT            10.3            202         0      Not Applicable
  03/26/2023 09 PM PDT            10.3            200         -      Not Applicable
  03/26/2023 10 PM PDT            10.3            200         0      Not Applicable
  03/26/2023 11 PM PDT            10.3            197         -      Not Applicable
  03/27/2023 12 AM PDT            10.3            197         0      Not Applicable
  03/27/2023 01 AM PDT            10.3            197         0      Not Applicable
  03/27/2023 02 AM PDT            10.3            195         -      Not Applicable
  03/27/2023 03 AM PDT            10.3            195         0      Not Applicable
  03/27/2023 04 AM PDT            10.2            192         -      Not Applicable
  03/27/2023 05 AM PDT            10.2            192         0      Not Applicable
#
# NOTE 1: Stages are rounded to the nearest tenth (.1) 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.