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: Aug 08 2026 at 7:32 AM PDTNext Issuance: Aug 09 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:  08/08/2026 at 07:33 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  08/04/2026 at 03:00 AM PDT
# Maximum Observed Stage:                       11.15 Feet
# Maximum Observed Flow:                        23 cfs
#
# Earliest Date & Time of Maximum Forecast:     08/08/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       11.12 Feet
# Maximum Forecast Flow:                        19 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  08/03/2026 07 AM PDT           11.14             21                Not Applicable
  08/03/2026 08 AM PDT           11.15             23         +      Not Applicable
  08/03/2026 09 AM PDT           11.15             23         0      Not Applicable
  08/03/2026 10 AM PDT           11.15             23         0      Not Applicable
  08/03/2026 11 AM PDT           11.15             23         0      Not Applicable
  08/03/2026 12 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 01 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 02 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 03 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 04 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 05 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 06 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 07 PM PDT           11.15             23         0      Not Applicable
  08/03/2026 08 PM PDT           11.14             21         -      Not Applicable
  08/03/2026 09 PM PDT           11.14             21         0      Not Applicable
  08/03/2026 10 PM PDT           11.14             21         0      Not Applicable
  08/03/2026 11 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 12 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 01 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 02 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 03 AM PDT           11.15             23         +      Not Applicable
  08/04/2026 04 AM PDT           11.14             21         -      Not Applicable
  08/04/2026 05 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 06 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 07 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 08 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 09 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 10 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 11 AM PDT           11.14             21         0      Not Applicable
  08/04/2026 12 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 01 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 02 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 03 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 04 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 05 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 06 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 07 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 08 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 09 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 10 PM PDT           11.14             21         0      Not Applicable
  08/04/2026 11 PM PDT           11.14             21         0      Not Applicable
  08/05/2026 12 AM PDT           11.14             21         0      Not Applicable
  08/05/2026 01 AM PDT           11.14             21         0      Not Applicable
  08/05/2026 02 AM PDT           11.14             21         0      Not Applicable
  08/05/2026 03 AM PDT           11.14             21         0      Not Applicable
  08/05/2026 04 AM PDT           11.13             20         -      Not Applicable
  08/05/2026 05 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 06 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 07 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 08 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 09 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 10 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 11 AM PDT           11.13             20         0      Not Applicable
  08/05/2026 12 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 01 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 02 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 03 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 04 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 05 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 06 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 07 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 08 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 09 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 10 PM PDT           11.13             20         0      Not Applicable
  08/05/2026 11 PM PDT           11.13             20         0      Not Applicable
  08/06/2026 12 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 01 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 02 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 03 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 04 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 05 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 06 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 07 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 08 AM PDT           11.13             20         0      Not Applicable
  08/06/2026 09 AM PDT           11.12             19         -      Not Applicable
  08/06/2026 10 AM PDT           11.12             19         0      Not Applicable
  08/06/2026 11 AM PDT           11.12             19         0      Not Applicable
  08/06/2026 12 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 01 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 02 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 03 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 04 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 05 PM PDT           11.13             20         +      Not Applicable
  08/06/2026 06 PM PDT           11.12             19         -      Not Applicable
  08/06/2026 07 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 08 PM PDT           11.13             20         +      Not Applicable
  08/06/2026 09 PM PDT           11.12             19         -      Not Applicable
  08/06/2026 10 PM PDT           11.12             19         0      Not Applicable
  08/06/2026 11 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 12 AM PDT           11.13             20         +      Not Applicable
  08/07/2026 01 AM PDT           11.13             20         0      Not Applicable
  08/07/2026 02 AM PDT           11.13             20         0      Not Applicable
  08/07/2026 03 AM PDT           11.13             20         0      Not Applicable
  08/07/2026 04 AM PDT           11.12             19         -      Not Applicable
  08/07/2026 05 AM PDT           11.13             20         +      Not Applicable
  08/07/2026 06 AM PDT           11.12             19         -      Not Applicable
  08/07/2026 07 AM PDT           11.12             19         0      Not Applicable
  08/07/2026 08 AM PDT           11.12             19         0      Not Applicable
  08/07/2026 09 AM PDT           11.12             19         0      Not Applicable
  08/07/2026 10 AM PDT           11.12             19         0      Not Applicable
  08/07/2026 11 AM PDT           11.12             19         0      Not Applicable
  08/07/2026 12 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 01 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 02 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 03 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 04 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 05 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 06 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 07 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 08 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 09 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 10 PM PDT           11.12             19         0      Not Applicable
  08/07/2026 11 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 12 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 01 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 02 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 03 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 04 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 05 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 06 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 07 AM PDT           11.12             19         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  08/08/2026 08 AM PDT           11.12             19                Not Applicable
  08/08/2026 09 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 10 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 11 AM PDT           11.12             19         0      Not Applicable
  08/08/2026 12 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 01 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 02 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 03 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 04 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 05 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 06 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 07 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 08 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 09 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 10 PM PDT           11.12             19         0      Not Applicable
  08/08/2026 11 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 12 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 01 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 02 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 03 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 04 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 05 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 06 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 07 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 08 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 09 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 10 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 11 AM PDT           11.12             19         0      Not Applicable
  08/09/2026 12 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 01 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 02 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 03 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 04 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 05 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 06 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 07 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 08 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 09 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 10 PM PDT           11.12             19         0      Not Applicable
  08/09/2026 11 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 12 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 01 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 02 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 03 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 04 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 05 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 06 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 07 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 08 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 09 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 10 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 11 AM PDT           11.12             19         0      Not Applicable
  08/10/2026 12 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 01 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 02 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 03 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 04 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 05 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 06 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 07 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 08 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 09 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 10 PM PDT           11.12             19         0      Not Applicable
  08/10/2026 11 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 12 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 01 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 02 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 03 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 04 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 05 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 06 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 07 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 08 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 09 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 10 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 11 AM PDT           11.12             19         0      Not Applicable
  08/11/2026 12 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 01 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 02 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 03 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 04 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 05 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 06 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 07 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 08 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 09 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 10 PM PDT           11.12             19         0      Not Applicable
  08/11/2026 11 PM PDT           11.12             19         0      Not Applicable
  08/12/2026 12 AM PDT           11.11             18         -      Not Applicable
  08/12/2026 01 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 02 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 03 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 04 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 05 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 06 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 07 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 08 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 09 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 10 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 11 AM PDT           11.11             18         0      Not Applicable
  08/12/2026 12 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 01 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 02 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 03 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 04 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 05 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 06 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 07 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 08 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 09 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 10 PM PDT           11.11             18         0      Not Applicable
  08/12/2026 11 PM PDT           11.11             18         0      Not Applicable
  08/13/2026 12 AM PDT           11.11             18         0      Not Applicable
  08/13/2026 01 AM PDT           11.11             18         0      Not Applicable
  08/13/2026 02 AM PDT           11.11             18         0      Not Applicable
  08/13/2026 03 AM PDT           11.11             18         0      Not Applicable
  08/13/2026 04 AM PDT           11.11             18         0      Not Applicable
  08/13/2026 05 AM PDT           11.11             18         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.