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

 | 

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: Jul 29 2026 at 6:17 AM PDTNext Issuance: Jul 30 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:  07/29/2026 at 06:18 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/25/2026 at 02:00 PM PDT
# Maximum Observed Stage:                       8.40 Feet
# Maximum Observed Flow:                        11 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/29/2026 at 07:00 AM PDT
# Maximum Forecast Stage:                       8.36 Feet
# Maximum Forecast Flow:                        9 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/24/2026 06 AM PDT            8.39             10                Not Applicable
  07/24/2026 07 AM PDT            8.39             10         0      Not Applicable
  07/24/2026 08 AM PDT            8.39             10         0      Not Applicable
  07/24/2026 09 AM PDT            8.39             10         0      Not Applicable
  07/24/2026 10 AM PDT            8.40             11         +      Not Applicable
  07/24/2026 11 AM PDT            8.40             11         0      Not Applicable
  07/24/2026 12 PM PDT            8.40             11         0      Not Applicable
  07/24/2026 01 PM PDT            8.40             11         0      Not Applicable
  07/24/2026 02 PM PDT            8.40             11         0      Not Applicable
  07/24/2026 03 PM PDT            8.40             11         0      Not Applicable
  07/24/2026 04 PM PDT            8.40             11         0      Not Applicable
  07/24/2026 05 PM PDT            8.40             11         0      Not Applicable
  07/24/2026 06 PM PDT            8.39             10         -      Not Applicable
  07/24/2026 07 PM PDT            8.39             10         0      Not Applicable
  07/24/2026 08 PM PDT            8.39             10         0      Not Applicable
  07/24/2026 09 PM PDT            8.39             10         0      Not Applicable
  07/24/2026 10 PM PDT            8.39             10         0      Not Applicable
  07/24/2026 11 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 12 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 01 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 02 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 03 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 04 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 05 AM PDT            8.38             10         -      Not Applicable
  07/25/2026 06 AM PDT            8.39             10         +      Not Applicable
  07/25/2026 07 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 08 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 09 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 10 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 11 AM PDT            8.39             10         0      Not Applicable
  07/25/2026 12 PM PDT            8.40             11         +      Not Applicable
  07/25/2026 01 PM PDT            8.39             10         -      Not Applicable
  07/25/2026 02 PM PDT            8.40             11         +      Not Applicable
  07/25/2026 03 PM PDT            8.39             10         -      Not Applicable
  07/25/2026 04 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 05 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 06 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 07 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 08 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 09 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 10 PM PDT            8.39             10         0      Not Applicable
  07/25/2026 11 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 12 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 01 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 02 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 03 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 04 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 05 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 06 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 07 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 08 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 09 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 10 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 11 AM PDT            8.39             10         0      Not Applicable
  07/26/2026 12 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 01 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 02 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 03 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 04 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 05 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 06 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 07 PM PDT            8.39             10         0      Not Applicable
  07/26/2026 08 PM PDT            8.38             10         -      Not Applicable
  07/26/2026 09 PM PDT            8.39             10         +      Not Applicable
  07/26/2026 10 PM PDT            8.38             10         -      Not Applicable
  07/26/2026 11 PM PDT            8.39             10         +      Not Applicable
  07/27/2026 12 AM PDT            8.38             10         -      Not Applicable
  07/27/2026 01 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 02 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 03 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 04 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 05 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 06 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 07 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 08 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 09 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 10 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 11 AM PDT            8.38             10         0      Not Applicable
  07/27/2026 12 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 01 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 02 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 03 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 04 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 05 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 06 PM PDT            8.38             10         0      Not Applicable
  07/27/2026 07 PM PDT            8.37              9         -      Not Applicable
  07/27/2026 08 PM PDT            8.37              9         0      Not Applicable
  07/27/2026 09 PM PDT            8.37              9         0      Not Applicable
  07/27/2026 10 PM PDT            8.37              9         0      Not Applicable
  07/27/2026 11 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 12 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 01 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 02 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 03 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 04 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 05 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 06 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 07 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 08 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 09 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 10 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 11 AM PDT            8.37              9         0      Not Applicable
  07/28/2026 12 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 01 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 02 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 03 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 04 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 05 PM PDT            8.37              9         0      Not Applicable
  07/28/2026 06 PM PDT            8.36              9         -      Not Applicable
  07/28/2026 07 PM PDT            8.36              9         0      Not Applicable
  07/28/2026 08 PM PDT            8.36              9         0      Not Applicable
  07/28/2026 09 PM PDT            8.36              9         0      Not Applicable
  07/28/2026 10 PM PDT            8.36              9         0      Not Applicable
  07/28/2026 11 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 12 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 01 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 02 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 03 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 04 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 05 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 06 AM PDT            8.36              9         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/29/2026 07 AM PDT            8.36              9                Not Applicable
  07/29/2026 08 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 09 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 10 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 11 AM PDT            8.36              9         0      Not Applicable
  07/29/2026 12 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 01 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 02 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 03 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 04 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 05 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 06 PM PDT            8.36              9         0      Not Applicable
  07/29/2026 07 PM PDT            8.35              9         -      Not Applicable
  07/29/2026 08 PM PDT            8.35              9         0      Not Applicable
  07/29/2026 09 PM PDT            8.35              9         0      Not Applicable
  07/29/2026 10 PM PDT            8.35              9         0      Not Applicable
  07/29/2026 11 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 12 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 01 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 02 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 03 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 04 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 05 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 06 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 07 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 08 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 09 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 10 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 11 AM PDT            8.35              9         0      Not Applicable
  07/30/2026 12 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 01 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 02 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 03 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 04 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 05 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 06 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 07 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 08 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 09 PM PDT            8.35              9         0      Not Applicable
  07/30/2026 10 PM PDT            8.34              8         -      Not Applicable
  07/30/2026 11 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 12 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 01 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 02 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 03 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 04 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 05 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 06 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 07 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 08 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 09 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 10 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 11 AM PDT            8.34              8         0      Not Applicable
  07/31/2026 12 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 01 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 02 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 03 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 04 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 05 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 06 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 07 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 08 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 09 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 10 PM PDT            8.34              8         0      Not Applicable
  07/31/2026 11 PM PDT            8.34              8         0      Not Applicable
  08/01/2026 12 AM PDT            8.33              8         -      Not Applicable
  08/01/2026 01 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 02 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 03 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 04 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 05 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 06 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 07 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 08 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 09 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 10 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 11 AM PDT            8.33              8         0      Not Applicable
  08/01/2026 12 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 01 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 02 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 03 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 04 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 05 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 06 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 07 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 08 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 09 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 10 PM PDT            8.33              8         0      Not Applicable
  08/01/2026 11 PM PDT            8.33              8         0      Not Applicable
  08/02/2026 12 AM PDT            8.32              7         -      Not Applicable
  08/02/2026 01 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 02 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 03 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 04 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 05 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 06 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 07 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 08 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 09 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 10 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 11 AM PDT            8.32              7         0      Not Applicable
  08/02/2026 12 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 01 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 02 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 03 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 04 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 05 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 06 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 07 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 08 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 09 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 10 PM PDT            8.32              7         0      Not Applicable
  08/02/2026 11 PM PDT            8.32              7         0      Not Applicable
  08/03/2026 12 AM PDT            8.32              7         0      Not Applicable
  08/03/2026 01 AM PDT            8.32              7         0      Not Applicable
  08/03/2026 02 AM PDT            8.31              7         -      Not Applicable
  08/03/2026 03 AM PDT            8.31              7         0      Not Applicable
  08/03/2026 04 AM PDT            8.31              7         0      Not Applicable
  08/03/2026 05 AM PDT            8.31              7         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.