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: Mar 23 2026 at 1:07 PM PDTNext Issuance: Mar 24 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:  03/23/2026 at 01:10 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/18/2026 at 03:00 PM PDT
# Maximum Observed Stage:                       12.42 Feet
# Maximum Observed Flow:                        496 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/23/2026 at 02:00 PM PDT
# Maximum Forecast Stage:                       12.30 Feet
# Maximum Forecast Flow:                        402 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/18/2026 01 PM PDT           12.42            496                Not Applicable
  03/18/2026 02 PM PDT           12.42            496         0      Not Applicable
  03/18/2026 03 PM PDT           12.42            496         0      Not Applicable
  03/18/2026 04 PM PDT           12.41            488         -      Not Applicable
  03/18/2026 05 PM PDT           12.41            488         0      Not Applicable
  03/18/2026 06 PM PDT           12.41            488         0      Not Applicable
  03/18/2026 07 PM PDT           12.41            488         0      Not Applicable
  03/18/2026 08 PM PDT           12.41            488         0      Not Applicable
  03/18/2026 09 PM PDT           12.41            488         0      Not Applicable
  03/18/2026 10 PM PDT           12.40            480         -      Not Applicable
  03/18/2026 11 PM PDT           12.40            480         0      Not Applicable
  03/19/2026 12 AM PDT           12.40            480         0      Not Applicable
  03/19/2026 01 AM PDT           12.40            480         0      Not Applicable
  03/19/2026 02 AM PDT           12.40            480         0      Not Applicable
  03/19/2026 03 AM PDT           12.40            480         0      Not Applicable
  03/19/2026 04 AM PDT           12.40            480         0      Not Applicable
  03/19/2026 05 AM PDT           12.39            472         -      Not Applicable
  03/19/2026 06 AM PDT           12.39            472         0      Not Applicable
  03/19/2026 07 AM PDT           12.39            472         0      Not Applicable
  03/19/2026 08 AM PDT           12.39            472         0      Not Applicable
  03/19/2026 09 AM PDT           12.39            472         0      Not Applicable
  03/19/2026 10 AM PDT           12.39            472         0      Not Applicable
  03/19/2026 11 AM PDT           12.39            472         0      Not Applicable
  03/19/2026 12 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 01 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 02 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 03 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 04 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 05 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 06 PM PDT           12.39            472         0      Not Applicable
  03/19/2026 07 PM PDT           12.38            463         -      Not Applicable
  03/19/2026 08 PM PDT           12.38            463         0      Not Applicable
  03/19/2026 09 PM PDT           12.37            455         -      Not Applicable
  03/19/2026 10 PM PDT           12.38            463         +      Not Applicable
  03/19/2026 11 PM PDT           12.37            455         -      Not Applicable
  03/20/2026 12 AM PDT           12.38            463         +      Not Applicable
  03/20/2026 01 AM PDT           12.37            455         -      Not Applicable
  03/20/2026 02 AM PDT           12.36            448         -      Not Applicable
  03/20/2026 03 AM PDT           12.36            448         0      Not Applicable
  03/20/2026 04 AM PDT           12.37            455         +      Not Applicable
  03/20/2026 05 AM PDT           12.37            455         0      Not Applicable
  03/20/2026 06 AM PDT           12.36            448         -      Not Applicable
  03/20/2026 07 AM PDT           12.36            448         0      Not Applicable
  03/20/2026 08 AM PDT           12.36            448         0      Not Applicable
  03/20/2026 09 AM PDT           12.36            448         0      Not Applicable
  03/20/2026 10 AM PDT           12.36            448         0      Not Applicable
  03/20/2026 11 AM PDT           12.37            455         +      Not Applicable
  03/20/2026 12 PM PDT           12.36            448         -      Not Applicable
  03/20/2026 01 PM PDT           12.36            448         0      Not Applicable
  03/20/2026 02 PM PDT           12.36            448         0      Not Applicable
  03/20/2026 03 PM PDT           12.36            448         0      Not Applicable
  03/20/2026 04 PM PDT           12.36            448         0      Not Applicable
  03/20/2026 05 PM PDT           12.36            448         0      Not Applicable
  03/20/2026 06 PM PDT           12.36            448         0      Not Applicable
  03/20/2026 07 PM PDT           12.35            440         -      Not Applicable
  03/20/2026 08 PM PDT           12.36            448         +      Not Applicable
  03/20/2026 09 PM PDT           12.34            432         -      Not Applicable
  03/20/2026 10 PM PDT           12.35            440         +      Not Applicable
  03/20/2026 11 PM PDT           12.35            440         0      Not Applicable
  03/21/2026 12 AM PDT           12.36            448         +      Not Applicable
  03/21/2026 01 AM PDT           12.35            440         -      Not Applicable
  03/21/2026 02 AM PDT           12.35            440         0      Not Applicable
  03/21/2026 03 AM PDT           12.34            432         -      Not Applicable
  03/21/2026 04 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 05 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 06 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 07 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 08 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 09 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 10 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 11 AM PDT           12.34            432         0      Not Applicable
  03/21/2026 12 PM PDT           12.34            432         0      Not Applicable
  03/21/2026 01 PM PDT           12.34            432         0      Not Applicable
  03/21/2026 02 PM PDT           12.34            432         0      Not Applicable
  03/21/2026 03 PM PDT           12.34            432         0      Not Applicable
  03/21/2026 04 PM PDT           12.34            432         0      Not Applicable
  03/21/2026 05 PM PDT           12.34            432         0      Not Applicable
  03/21/2026 06 PM PDT           12.33            425         -      Not Applicable
  03/21/2026 07 PM PDT           12.33            425         0      Not Applicable
  03/21/2026 08 PM PDT           12.33            425         0      Not Applicable
  03/21/2026 09 PM PDT           12.33            425         0      Not Applicable
  03/21/2026 10 PM PDT           12.32            417         -      Not Applicable
  03/21/2026 11 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 12 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 01 AM PDT           12.33            425         +      Not Applicable
  03/22/2026 02 AM PDT           12.32            417         -      Not Applicable
  03/22/2026 03 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 04 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 05 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 06 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 07 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 08 AM PDT           12.31            410         -      Not Applicable
  03/22/2026 09 AM PDT           12.32            417         +      Not Applicable
  03/22/2026 10 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 11 AM PDT           12.32            417         0      Not Applicable
  03/22/2026 12 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 01 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 02 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 03 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 04 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 05 PM PDT           12.32            417         0      Not Applicable
  03/22/2026 06 PM PDT           12.31            410         -      Not Applicable
  03/22/2026 07 PM PDT           12.31            410         0      Not Applicable
  03/22/2026 08 PM PDT           12.31            410         0      Not Applicable
  03/22/2026 09 PM PDT           12.31            410         0      Not Applicable
  03/22/2026 10 PM PDT           12.31            410         0      Not Applicable
  03/22/2026 11 PM PDT           12.31            410         0      Not Applicable
  03/23/2026 12 AM PDT           12.30            402         -      Not Applicable
  03/23/2026 01 AM PDT           12.31            410         +      Not Applicable
  03/23/2026 02 AM PDT           12.30            402         -      Not Applicable
  03/23/2026 03 AM PDT           12.30            402         0      Not Applicable
  03/23/2026 04 AM PDT           12.30            402         0      Not Applicable
  03/23/2026 05 AM PDT           12.30            402         0      Not Applicable
  03/23/2026 06 AM PDT           12.30            402         0      Not Applicable
  03/23/2026 07 AM PDT           12.29            395         -      Not Applicable
  03/23/2026 08 AM PDT           12.29            395         0      Not Applicable
  03/23/2026 09 AM PDT           12.30            402         +      Not Applicable
  03/23/2026 10 AM PDT           12.30            402         0      Not Applicable
  03/23/2026 11 AM PDT           12.30            402         0      Not Applicable
  03/23/2026 12 PM PDT           12.30            402         0      Not Applicable
  03/23/2026 01 PM PDT           12.30            402         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/23/2026 02 PM PDT           12.30            402                Not Applicable
  03/23/2026 03 PM PDT           12.29            395         -      Not Applicable
  03/23/2026 04 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 05 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 06 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 07 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 08 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 09 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 10 PM PDT           12.29            395         0      Not Applicable
  03/23/2026 11 PM PDT           12.29            395         0      Not Applicable
  03/24/2026 12 AM PDT           12.29            395         0      Not Applicable
  03/24/2026 01 AM PDT           12.29            395         0      Not Applicable
  03/24/2026 02 AM PDT           12.29            395         0      Not Applicable
  03/24/2026 03 AM PDT           12.29            395         0      Not Applicable
  03/24/2026 04 AM PDT           12.28            388         -      Not Applicable
  03/24/2026 05 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 06 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 07 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 08 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 09 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 10 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 11 AM PDT           12.28            388         0      Not Applicable
  03/24/2026 12 PM PDT           12.28            388         0      Not Applicable
  03/24/2026 01 PM PDT           12.28            388         0      Not Applicable
  03/24/2026 02 PM PDT           12.28            388         0      Not Applicable
  03/24/2026 03 PM PDT           12.27            381         -      Not Applicable
  03/24/2026 04 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 05 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 06 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 07 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 08 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 09 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 10 PM PDT           12.27            381         0      Not Applicable
  03/24/2026 11 PM PDT           12.27            381         0      Not Applicable
  03/25/2026 12 AM PDT           12.27            381         0      Not Applicable
  03/25/2026 01 AM PDT           12.27            381         0      Not Applicable
  03/25/2026 02 AM PDT           12.26            374         -      Not Applicable
  03/25/2026 03 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 04 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 05 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 06 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 07 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 08 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 09 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 10 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 11 AM PDT           12.26            374         0      Not Applicable
  03/25/2026 12 PM PDT           12.26            374         0      Not Applicable
  03/25/2026 01 PM PDT           12.26            374         0      Not Applicable
  03/25/2026 02 PM PDT           12.25            367         -      Not Applicable
  03/25/2026 03 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 04 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 05 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 06 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 07 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 08 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 09 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 10 PM PDT           12.25            367         0      Not Applicable
  03/25/2026 11 PM PDT           12.25            367         0      Not Applicable
  03/26/2026 12 AM PDT           12.25            367         0      Not Applicable
  03/26/2026 01 AM PDT           12.24            360         -      Not Applicable
  03/26/2026 02 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 03 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 04 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 05 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 06 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 07 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 08 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 09 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 10 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 11 AM PDT           12.24            360         0      Not Applicable
  03/26/2026 12 PM PDT           12.23            354         -      Not Applicable
  03/26/2026 01 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 02 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 03 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 04 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 05 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 06 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 07 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 08 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 09 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 10 PM PDT           12.23            354         0      Not Applicable
  03/26/2026 11 PM PDT           12.22            347         -      Not Applicable
  03/27/2026 12 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 01 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 02 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 03 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 04 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 05 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 06 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 07 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 08 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 09 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 10 AM PDT           12.22            347         0      Not Applicable
  03/27/2026 11 AM PDT           12.21            341         -      Not Applicable
  03/27/2026 12 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 01 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 02 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 03 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 04 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 05 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 06 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 07 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 08 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 09 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 10 PM PDT           12.21            341         0      Not Applicable
  03/27/2026 11 PM PDT           12.21            341         0      Not Applicable
  03/28/2026 12 AM PDT           12.21            341         0      Not Applicable
  03/28/2026 01 AM PDT           12.20            334         -      Not Applicable
  03/28/2026 02 AM PDT           12.20            334         0      Not Applicable
  03/28/2026 03 AM PDT           12.20            334         0      Not Applicable
  03/28/2026 04 AM PDT           12.20            334         0      Not Applicable
  03/28/2026 05 AM PDT           12.20            334         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.