MATTOLE RIVER - PETROLIA (MTOC1)
Latitude: 40.31º NLongitude: 124.28º WElevation: 40 FeetForecast Type: Unofficial Location
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Jun 05 2026 at 7:37 AM PDTNext Issuance: Jun 06 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 - Petrolia (MTOC1)
#
# File Generation Time:  06/05/2026 at 07:39 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/31/2026 at 02:00 PM PDT
# Maximum Observed Stage:                       11.73 Feet
# Maximum Observed Flow:                        107 cfs
#
# Earliest Date & Time of Maximum Forecast:     06/09/2026 at 12:00 PM PDT
# Maximum Forecast Stage:                       11.70 Feet
# Maximum Forecast Flow:                        96 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/31/2026 07 AM PDT           11.73            107                Not Applicable
  05/31/2026 08 AM PDT           11.73            107         0      Not Applicable
  05/31/2026 09 AM PDT           11.73            107         0      Not Applicable
  05/31/2026 10 AM PDT           11.72            103         -      Not Applicable
  05/31/2026 11 AM PDT           11.72            103         0      Not Applicable
  05/31/2026 12 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 01 PM PDT           11.73            107         +      Not Applicable
  05/31/2026 02 PM PDT           11.73            107         0      Not Applicable
  05/31/2026 03 PM PDT           11.72            103         -      Not Applicable
  05/31/2026 04 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 05 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 06 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 07 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 08 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 09 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 10 PM PDT           11.72            103         0      Not Applicable
  05/31/2026 11 PM PDT           11.72            103         0      Not Applicable
  06/01/2026 12 AM PDT           11.72            103         0      Not Applicable
  06/01/2026 01 AM PDT           11.71            100         -      Not Applicable
  06/01/2026 02 AM PDT           11.72            103         +      Not Applicable
  06/01/2026 03 AM PDT           11.72            103         0      Not Applicable
  06/01/2026 04 AM PDT           11.71            100         -      Not Applicable
  06/01/2026 05 AM PDT           11.71            100         0      Not Applicable
  06/01/2026 06 AM PDT           11.71            100         0      Not Applicable
  06/01/2026 07 AM PDT           11.71            100         0      Not Applicable
  06/01/2026 08 AM PDT           11.72            103         +      Not Applicable
  06/01/2026 09 AM PDT           11.71            100         -      Not Applicable
  06/01/2026 10 AM PDT           11.72            103         +      Not Applicable
  06/01/2026 11 AM PDT           11.72            103         0      Not Applicable
  06/01/2026 12 PM PDT           11.72            103         0      Not Applicable
  06/01/2026 01 PM PDT           11.71            100         -      Not Applicable
  06/01/2026 02 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 03 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 04 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 05 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 06 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 07 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 08 PM PDT           11.71            100         0      Not Applicable
  06/01/2026 09 PM PDT           11.70             96         -      Not Applicable
  06/01/2026 10 PM PDT           11.71            100         +      Not Applicable
  06/01/2026 11 PM PDT           11.71            100         0      Not Applicable
  06/02/2026 12 AM PDT           11.70             96         -      Not Applicable
  06/02/2026 01 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 02 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 03 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 04 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 05 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 06 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 07 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 08 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 09 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 10 AM PDT           11.70             96         0      Not Applicable
  06/02/2026 11 AM PDT           11.69             93         -      Not Applicable
  06/02/2026 12 PM PDT           11.69             93         0      Not Applicable
  06/02/2026 01 PM PDT           11.69             93         0      Not Applicable
  06/02/2026 02 PM PDT           11.70             96         +      Not Applicable
  06/02/2026 03 PM PDT           11.70             96         0      Not Applicable
  06/02/2026 04 PM PDT           11.70             96         0      Not Applicable
  06/02/2026 05 PM PDT           11.70             96         0      Not Applicable
  06/02/2026 06 PM PDT           11.69             93         -      Not Applicable
  06/02/2026 07 PM PDT           11.70             96         +      Not Applicable
  06/02/2026 08 PM PDT           11.69             93         -      Not Applicable
  06/02/2026 09 PM PDT           11.69             93         0      Not Applicable
  06/02/2026 10 PM PDT           11.69             93         0      Not Applicable
  06/02/2026 11 PM PDT           11.69             93         0      Not Applicable
  06/03/2026 12 AM PDT           11.69             93         0      Not Applicable
  06/03/2026 01 AM PDT           11.69             93         0      Not Applicable
  06/03/2026 02 AM PDT           11.69             93         0      Not Applicable
  06/03/2026 03 AM PDT           11.69             93         0      Not Applicable
  06/03/2026 04 AM PDT           11.69             93         0      Not Applicable
  06/03/2026 05 AM PDT           11.68             90         -      Not Applicable
  06/03/2026 06 AM PDT           11.69             93         +      Not Applicable
  06/03/2026 07 AM PDT           11.68             90         -      Not Applicable
  06/03/2026 08 AM PDT           11.68             90         0      Not Applicable
  06/03/2026 09 AM PDT           11.69             93         +      Not Applicable
  06/03/2026 10 AM PDT           11.68             90         -      Not Applicable
  06/03/2026 11 AM PDT           11.68             90         0      Not Applicable
  06/03/2026 12 PM PDT           11.68             90         0      Not Applicable
  06/03/2026 01 PM PDT           11.68             90         0      Not Applicable
  06/03/2026 02 PM PDT           11.68             90         0      Not Applicable
  06/03/2026 03 PM PDT           11.68             90         0      Not Applicable
  06/03/2026 04 PM PDT           11.68             90         0      Not Applicable
  06/03/2026 05 PM PDT           11.67             86         -      Not Applicable
  06/03/2026 06 PM PDT           11.68             90         +      Not Applicable
  06/03/2026 07 PM PDT           11.66             83         -      Not Applicable
  06/03/2026 08 PM PDT           11.66             83         0      Not Applicable
  06/03/2026 09 PM PDT           11.67             86         +      Not Applicable
  06/03/2026 10 PM PDT           11.67             86         0      Not Applicable
  06/03/2026 11 PM PDT           11.67             86         0      Not Applicable
  06/04/2026 12 AM PDT           11.67             86         0      Not Applicable
  06/04/2026 01 AM PDT           11.66             83         -      Not Applicable
  06/04/2026 02 AM PDT           11.66             83         0      Not Applicable
  06/04/2026 03 AM PDT           11.67             86         +      Not Applicable
  06/04/2026 04 AM PDT           11.67             86         0      Not Applicable
  06/04/2026 05 AM PDT           11.66             83         -      Not Applicable
  06/04/2026 06 AM PDT           11.66             83         0      Not Applicable
  06/04/2026 07 AM PDT           11.67             86         +      Not Applicable
  06/04/2026 08 AM PDT           11.67             86         0      Not Applicable
  06/04/2026 09 AM PDT           11.66             83         -      Not Applicable
  06/04/2026 10 AM PDT           11.66             83         0      Not Applicable
  06/04/2026 11 AM PDT           11.66             83         0      Not Applicable
  06/04/2026 12 PM PDT           11.66             83         0      Not Applicable
  06/04/2026 01 PM PDT           11.67             86         +      Not Applicable
  06/04/2026 02 PM PDT           11.67             86         0      Not Applicable
  06/04/2026 03 PM PDT           11.66             83         -      Not Applicable
  06/04/2026 04 PM PDT           11.66             83         0      Not Applicable
  06/04/2026 05 PM PDT           11.66             83         0      Not Applicable
  06/04/2026 06 PM PDT           11.66             83         0      Not Applicable
  06/04/2026 07 PM PDT           11.64             77         -      Not Applicable
  06/04/2026 08 PM PDT           11.65             80         +      Not Applicable
  06/04/2026 09 PM PDT           11.65             80         0      Not Applicable
  06/04/2026 10 PM PDT           11.64             77         -      Not Applicable
  06/04/2026 11 PM PDT           11.65             80         +      Not Applicable
  06/05/2026 12 AM PDT           11.63             74         -      Not Applicable
  06/05/2026 01 AM PDT           11.65             80         +      Not Applicable
  06/05/2026 02 AM PDT           11.65             80         0      Not Applicable
  06/05/2026 03 AM PDT           11.64             77         -      Not Applicable
  06/05/2026 04 AM PDT           11.63             74         -      Not Applicable
  06/05/2026 05 AM PDT           11.65             80         +      Not Applicable
  06/05/2026 06 AM PDT           11.65             80         0      Not Applicable
  06/05/2026 07 AM PDT           11.65             80         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  06/05/2026 08 AM PDT           11.65             80                Not Applicable
  06/05/2026 09 AM PDT           11.65             80         0      Not Applicable
  06/05/2026 10 AM PDT           11.65             80         0      Not Applicable
  06/05/2026 11 AM PDT           11.65             80         0      Not Applicable
  06/05/2026 12 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 01 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 02 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 03 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 04 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 05 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 06 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 07 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 08 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 09 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 10 PM PDT           11.65             80         0      Not Applicable
  06/05/2026 11 PM PDT           11.65             80         0      Not Applicable
  06/06/2026 12 AM PDT           11.65             80         0      Not Applicable
  06/06/2026 01 AM PDT           11.65             80         0      Not Applicable
  06/06/2026 02 AM PDT           11.65             80         0      Not Applicable
  06/06/2026 03 AM PDT           11.64             77         -      Not Applicable
  06/06/2026 04 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 05 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 06 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 07 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 08 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 09 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 10 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 11 AM PDT           11.64             77         0      Not Applicable
  06/06/2026 12 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 01 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 02 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 03 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 04 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 05 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 06 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 07 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 08 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 09 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 10 PM PDT           11.64             77         0      Not Applicable
  06/06/2026 11 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 12 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 01 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 02 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 03 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 04 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 05 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 06 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 07 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 08 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 09 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 10 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 11 AM PDT           11.64             77         0      Not Applicable
  06/07/2026 12 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 01 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 02 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 03 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 04 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 05 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 06 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 07 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 08 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 09 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 10 PM PDT           11.64             77         0      Not Applicable
  06/07/2026 11 PM PDT           11.64             77         0      Not Applicable
  06/08/2026 12 AM PDT           11.64             77         0      Not Applicable
  06/08/2026 01 AM PDT           11.63             74         -      Not Applicable
  06/08/2026 02 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 03 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 04 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 05 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 06 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 07 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 08 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 09 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 10 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 11 AM PDT           11.63             74         0      Not Applicable
  06/08/2026 12 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 01 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 02 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 03 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 04 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 05 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 06 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 07 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 08 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 09 PM PDT           11.63             74         0      Not Applicable
  06/08/2026 10 PM PDT           11.64             77         +      Not Applicable
  06/08/2026 11 PM PDT           11.64             77         0      Not Applicable
  06/09/2026 12 AM PDT           11.64             77         0      Not Applicable
  06/09/2026 01 AM PDT           11.64             77         0      Not Applicable
  06/09/2026 02 AM PDT           11.65             80         +      Not Applicable
  06/09/2026 03 AM PDT           11.65             80         0      Not Applicable
  06/09/2026 04 AM PDT           11.66             83         +      Not Applicable
  06/09/2026 05 AM PDT           11.66             83         0      Not Applicable
  06/09/2026 06 AM PDT           11.67             86         +      Not Applicable
  06/09/2026 07 AM PDT           11.68             90         +      Not Applicable
  06/09/2026 08 AM PDT           11.68             90         0      Not Applicable
  06/09/2026 09 AM PDT           11.69             93         +      Not Applicable
  06/09/2026 10 AM PDT           11.69             93         0      Not Applicable
  06/09/2026 11 AM PDT           11.69             93         0      Not Applicable
  06/09/2026 12 PM PDT           11.70             96         +      Not Applicable
  06/09/2026 01 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 02 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 03 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 04 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 05 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 06 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 07 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 08 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 09 PM PDT           11.70             96         0      Not Applicable
  06/09/2026 10 PM PDT           11.69             93         -      Not Applicable
  06/09/2026 11 PM PDT           11.69             93         0      Not Applicable
  06/10/2026 12 AM PDT           11.69             93         0      Not Applicable
  06/10/2026 01 AM PDT           11.68             90         -      Not Applicable
  06/10/2026 02 AM PDT           11.68             90         0      Not Applicable
  06/10/2026 03 AM PDT           11.68             90         0      Not Applicable
  06/10/2026 04 AM PDT           11.67             86         -      Not Applicable
  06/10/2026 05 AM PDT           11.67             86         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.