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 20 2026 at 8:15 AM PDTNext Issuance: Jun 21 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:  06/20/2026 at 08:16 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  06/15/2026 at 04:00 PM PDT
# Maximum Observed Stage:                       11.58 Feet
# Maximum Observed Flow:                        61 cfs
#
# Earliest Date & Time of Maximum Forecast:     06/20/2026 at 09:00 AM PDT
# Maximum Forecast Stage:                       11.54 Feet
# Maximum Forecast Flow:                        51 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  06/15/2026 08 AM PDT           11.58             61                Not Applicable
  06/15/2026 09 AM PDT           11.58             61         0      Not Applicable
  06/15/2026 10 AM PDT           11.57             58         -      Not Applicable
  06/15/2026 11 AM PDT           11.58             61         +      Not Applicable
  06/15/2026 12 PM PDT           11.57             58         -      Not Applicable
  06/15/2026 01 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 02 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 03 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 04 PM PDT           11.58             61         +      Not Applicable
  06/15/2026 05 PM PDT           11.57             58         -      Not Applicable
  06/15/2026 06 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 07 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 08 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 09 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 10 PM PDT           11.57             58         0      Not Applicable
  06/15/2026 11 PM PDT           11.56             56         -      Not Applicable
  06/16/2026 12 AM PDT           11.56             56         0      Not Applicable
  06/16/2026 01 AM PDT           11.56             56         0      Not Applicable
  06/16/2026 02 AM PDT           11.56             56         0      Not Applicable
  06/16/2026 03 AM PDT           11.56             56         0      Not Applicable
  06/16/2026 04 AM PDT           11.56             56         0      Not Applicable
  06/16/2026 05 AM PDT           11.57             58         +      Not Applicable
  06/16/2026 06 AM PDT           11.56             56         -      Not Applicable
  06/16/2026 07 AM PDT           11.57             58         +      Not Applicable
  06/16/2026 08 AM PDT           11.57             58         0      Not Applicable
  06/16/2026 09 AM PDT           11.56             56         -      Not Applicable
  06/16/2026 10 AM PDT           11.56             56         0      Not Applicable
  06/16/2026 11 AM PDT           11.57             58         +      Not Applicable
  06/16/2026 12 PM PDT           11.56             56         -      Not Applicable
  06/16/2026 01 PM PDT           11.57             58         +      Not Applicable
  06/16/2026 02 PM PDT           11.57             58         0      Not Applicable
  06/16/2026 03 PM PDT           11.56             56         -      Not Applicable
  06/16/2026 04 PM PDT           11.57             58         +      Not Applicable
  06/16/2026 05 PM PDT           11.56             56         -      Not Applicable
  06/16/2026 06 PM PDT           11.56             56         0      Not Applicable
  06/16/2026 07 PM PDT           11.56             56         0      Not Applicable
  06/16/2026 08 PM PDT           11.56             56         0      Not Applicable
  06/16/2026 09 PM PDT           11.56             56         0      Not Applicable
  06/16/2026 10 PM PDT           11.55             53         -      Not Applicable
  06/16/2026 11 PM PDT           11.56             56         +      Not Applicable
  06/17/2026 12 AM PDT           11.55             53         -      Not Applicable
  06/17/2026 01 AM PDT           11.56             56         +      Not Applicable
  06/17/2026 02 AM PDT           11.56             56         0      Not Applicable
  06/17/2026 03 AM PDT           11.56             56         0      Not Applicable
  06/17/2026 04 AM PDT           11.56             56         0      Not Applicable
  06/17/2026 05 AM PDT           11.56             56         0      Not Applicable
  06/17/2026 06 AM PDT           11.56             56         0      Not Applicable
  06/17/2026 07 AM PDT           11.55             53         -      Not Applicable
  06/17/2026 08 AM PDT           11.56             56         +      Not Applicable
  06/17/2026 09 AM PDT           11.56             56         0      Not Applicable
  06/17/2026 10 AM PDT           11.55             53         -      Not Applicable
  06/17/2026 11 AM PDT           11.55             53         0      Not Applicable
  06/17/2026 12 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 01 PM PDT           11.54             51         -      Not Applicable
  06/17/2026 02 PM PDT           11.55             53         +      Not Applicable
  06/17/2026 03 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 04 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 05 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 06 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 07 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 08 PM PDT           11.55             53         0      Not Applicable
  06/17/2026 09 PM PDT           11.54             51         -      Not Applicable
  06/17/2026 10 PM PDT           11.54             51         0      Not Applicable
  06/17/2026 11 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 12 AM PDT           11.54             51         0      Not Applicable
  06/18/2026 01 AM PDT           11.54             51         0      Not Applicable
  06/18/2026 02 AM PDT           11.54             51         0      Not Applicable
  06/18/2026 03 AM PDT           11.54             51         0      Not Applicable
  06/18/2026 04 AM PDT           11.55             53         +      Not Applicable
  06/18/2026 05 AM PDT           11.54             51         -      Not Applicable
  06/18/2026 06 AM PDT           11.54             51         0      Not Applicable
  06/18/2026 07 AM PDT           11.55             53         +      Not Applicable
  06/18/2026 08 AM PDT           11.54             51         -      Not Applicable
  06/18/2026 09 AM PDT           11.54             51         0      Not Applicable
  06/18/2026 10 AM PDT           11.55             53         +      Not Applicable
  06/18/2026 11 AM PDT           11.54             51         -      Not Applicable
  06/18/2026 12 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 01 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 02 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 03 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 04 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 05 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 06 PM PDT           11.54             51         0      Not Applicable
  06/18/2026 07 PM PDT           11.53             49         -      Not Applicable
  06/18/2026 08 PM PDT           11.54             51         +      Not Applicable
  06/18/2026 09 PM PDT           11.53             49         -      Not Applicable
  06/18/2026 10 PM PDT           11.53             49         0      Not Applicable
  06/18/2026 11 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 12 AM PDT           11.53             49         0      Not Applicable
  06/19/2026 01 AM PDT           11.53             49         0      Not Applicable
  06/19/2026 02 AM PDT           11.53             49         0      Not Applicable
  06/19/2026 03 AM PDT           11.54             51         +      Not Applicable
  06/19/2026 04 AM PDT           11.53             49         -      Not Applicable
  06/19/2026 05 AM PDT           11.53             49         0      Not Applicable
  06/19/2026 06 AM PDT           11.53             49         0      Not Applicable
  06/19/2026 07 AM PDT           11.53             49         0      Not Applicable
  06/19/2026 08 AM PDT           11.54             51         +      Not Applicable
  06/19/2026 09 AM PDT           11.53             49         -      Not Applicable
  06/19/2026 10 AM PDT           11.54             51         +      Not Applicable
  06/19/2026 11 AM PDT           11.54             51         0      Not Applicable
  06/19/2026 12 PM PDT           11.54             51         0      Not Applicable
  06/19/2026 01 PM PDT           11.54             51         0      Not Applicable
  06/19/2026 02 PM PDT           11.53             49         -      Not Applicable
  06/19/2026 03 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 04 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 05 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 06 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 07 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 08 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 09 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 10 PM PDT           11.53             49         0      Not Applicable
  06/19/2026 11 PM PDT           11.53             49         0      Not Applicable
  06/20/2026 12 AM PDT           11.53             49         0      Not Applicable
  06/20/2026 01 AM PDT           11.53             49         0      Not Applicable
  06/20/2026 02 AM PDT           11.53             49         0      Not Applicable
  06/20/2026 03 AM PDT           11.54             51         +      Not Applicable
  06/20/2026 04 AM PDT           11.54             51         0      Not Applicable
  06/20/2026 05 AM PDT           11.54             51         0      Not Applicable
  06/20/2026 06 AM PDT           11.54             51         0      Not Applicable
  06/20/2026 07 AM PDT           11.54             51         0      Not Applicable
  06/20/2026 08 AM PDT           11.54             51         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  06/20/2026 09 AM PDT           11.54             51                Not Applicable
  06/20/2026 10 AM PDT           11.54             51         0      Not Applicable
  06/20/2026 11 AM PDT           11.54             51         0      Not Applicable
  06/20/2026 12 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 01 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 02 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 03 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 04 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 05 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 06 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 07 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 08 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 09 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 10 PM PDT           11.54             51         0      Not Applicable
  06/20/2026 11 PM PDT           11.54             51         0      Not Applicable
  06/21/2026 12 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 01 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 02 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 03 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 04 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 05 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 06 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 07 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 08 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 09 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 10 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 11 AM PDT           11.54             51         0      Not Applicable
  06/21/2026 12 PM PDT           11.54             51         0      Not Applicable
  06/21/2026 01 PM PDT           11.54             51         0      Not Applicable
  06/21/2026 02 PM PDT           11.53             49         -      Not Applicable
  06/21/2026 03 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 04 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 05 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 06 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 07 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 08 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 09 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 10 PM PDT           11.53             49         0      Not Applicable
  06/21/2026 11 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 12 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 01 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 02 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 03 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 04 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 05 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 06 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 07 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 08 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 09 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 10 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 11 AM PDT           11.53             49         0      Not Applicable
  06/22/2026 12 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 01 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 02 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 03 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 04 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 05 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 06 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 07 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 08 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 09 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 10 PM PDT           11.53             49         0      Not Applicable
  06/22/2026 11 PM PDT           11.53             49         0      Not Applicable
  06/23/2026 12 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 01 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 02 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 03 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 04 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 05 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 06 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 07 AM PDT           11.53             49         0      Not Applicable
  06/23/2026 08 AM PDT           11.52             47         -      Not Applicable
  06/23/2026 09 AM PDT           11.52             47         0      Not Applicable
  06/23/2026 10 AM PDT           11.52             47         0      Not Applicable
  06/23/2026 11 AM PDT           11.52             47         0      Not Applicable
  06/23/2026 12 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 01 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 02 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 03 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 04 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 05 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 06 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 07 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 08 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 09 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 10 PM PDT           11.52             47         0      Not Applicable
  06/23/2026 11 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 12 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 01 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 02 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 03 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 04 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 05 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 06 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 07 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 08 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 09 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 10 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 11 AM PDT           11.52             47         0      Not Applicable
  06/24/2026 12 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 01 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 02 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 03 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 04 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 05 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 06 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 07 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 08 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 09 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 10 PM PDT           11.52             47         0      Not Applicable
  06/24/2026 11 PM PDT           11.52             47         0      Not Applicable
  06/25/2026 12 AM PDT           11.52             47         0      Not Applicable
  06/25/2026 01 AM PDT           11.52             47         0      Not Applicable
  06/25/2026 02 AM PDT           11.51             45         -      Not Applicable
  06/25/2026 03 AM PDT           11.51             45         0      Not Applicable
  06/25/2026 04 AM PDT           11.51             45         0      Not Applicable
  06/25/2026 05 AM PDT           11.51             45         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.