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: May 12 2026 at 7:30 AM PDTNext Issuance: May 13 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:  05/12/2026 at 07:31 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/07/2026 at 10:00 PM PDT
# Maximum Observed Stage:                       12.02 Feet
# Maximum Observed Flow:                        193 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/12/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       11.94 Feet
# Maximum Forecast Flow:                        151 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/07/2026 07 AM PDT           12.02            193                Not Applicable
  05/07/2026 08 AM PDT           12.02            193         0      Not Applicable
  05/07/2026 09 AM PDT           12.02            193         0      Not Applicable
  05/07/2026 10 AM PDT           12.02            193         0      Not Applicable
  05/07/2026 11 AM PDT           12.02            193         0      Not Applicable
  05/07/2026 12 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 01 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 02 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 03 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 04 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 05 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 06 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 07 PM PDT           12.02            193         0      Not Applicable
  05/07/2026 08 PM PDT           12.01            187         -      Not Applicable
  05/07/2026 09 PM PDT           12.01            187         0      Not Applicable
  05/07/2026 10 PM PDT           12.02            193         +      Not Applicable
  05/07/2026 11 PM PDT           12.01            187         -      Not Applicable
  05/08/2026 12 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 01 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 02 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 03 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 04 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 05 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 06 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 07 AM PDT           12.00            182         -      Not Applicable
  05/08/2026 08 AM PDT           12.01            187         +      Not Applicable
  05/08/2026 09 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 10 AM PDT           12.01            187         0      Not Applicable
  05/08/2026 11 AM PDT           12.00            182         -      Not Applicable
  05/08/2026 12 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 01 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 02 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 03 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 04 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 05 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 06 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 07 PM PDT           12.00            182         0      Not Applicable
  05/08/2026 08 PM PDT           11.99            176         -      Not Applicable
  05/08/2026 09 PM PDT           11.99            176         0      Not Applicable
  05/08/2026 10 PM PDT           11.99            176         0      Not Applicable
  05/08/2026 11 PM PDT           11.99            176         0      Not Applicable
  05/09/2026 12 AM PDT           11.99            176         0      Not Applicable
  05/09/2026 01 AM PDT           11.99            176         0      Not Applicable
  05/09/2026 02 AM PDT           11.99            176         0      Not Applicable
  05/09/2026 03 AM PDT           11.99            176         0      Not Applicable
  05/09/2026 04 AM PDT           11.99            176         0      Not Applicable
  05/09/2026 05 AM PDT           11.98            171         -      Not Applicable
  05/09/2026 06 AM PDT           11.98            171         0      Not Applicable
  05/09/2026 07 AM PDT           11.98            171         0      Not Applicable
  05/09/2026 08 AM PDT           11.98            171         0      Not Applicable
  05/09/2026 09 AM PDT           11.98            171         0      Not Applicable
  05/09/2026 10 AM PDT           11.98            171         0      Not Applicable
  05/09/2026 11 AM PDT           11.98            171         0      Not Applicable
  05/09/2026 12 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 01 PM PDT           11.99            176         +      Not Applicable
  05/09/2026 02 PM PDT           11.98            171         -      Not Applicable
  05/09/2026 03 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 04 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 05 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 06 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 07 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 08 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 09 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 10 PM PDT           11.98            171         0      Not Applicable
  05/09/2026 11 PM PDT           11.97            166         -      Not Applicable
  05/10/2026 12 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 01 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 02 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 03 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 04 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 05 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 06 AM PDT           11.97            166         0      Not Applicable
  05/10/2026 07 AM PDT           11.96            161         -      Not Applicable
  05/10/2026 08 AM PDT           11.96            161         0      Not Applicable
  05/10/2026 09 AM PDT           11.98            171         +      Not Applicable
  05/10/2026 10 AM PDT           11.96            161         -      Not Applicable
  05/10/2026 11 AM PDT           11.97            166         +      Not Applicable
  05/10/2026 12 PM PDT           11.96            161         -      Not Applicable
  05/10/2026 01 PM PDT           11.96            161         0      Not Applicable
  05/10/2026 02 PM PDT           11.97            166         +      Not Applicable
  05/10/2026 03 PM PDT           11.97            166         0      Not Applicable
  05/10/2026 04 PM PDT           11.96            161         -      Not Applicable
  05/10/2026 05 PM PDT           11.96            161         0      Not Applicable
  05/10/2026 06 PM PDT           11.95            156         -      Not Applicable
  05/10/2026 07 PM PDT           11.96            161         +      Not Applicable
  05/10/2026 08 PM PDT           11.96            161         0      Not Applicable
  05/10/2026 09 PM PDT           11.95            156         -      Not Applicable
  05/10/2026 10 PM PDT           11.96            161         +      Not Applicable
  05/10/2026 11 PM PDT           11.96            161         0      Not Applicable
  05/11/2026 12 AM PDT           11.95            156         -      Not Applicable
  05/11/2026 01 AM PDT           11.96            161         +      Not Applicable
  05/11/2026 02 AM PDT           11.95            156         -      Not Applicable
  05/11/2026 03 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 04 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 05 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 06 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 07 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 08 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 09 AM PDT           11.95            156         0      Not Applicable
  05/11/2026 10 AM PDT           11.94            151         -      Not Applicable
  05/11/2026 11 AM PDT           11.95            156         +      Not Applicable
  05/11/2026 12 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 01 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 02 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 03 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 04 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 05 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 06 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 07 PM PDT           11.95            156         0      Not Applicable
  05/11/2026 08 PM PDT           11.94            151         -      Not Applicable
  05/11/2026 09 PM PDT           11.94            151         0      Not Applicable
  05/11/2026 10 PM PDT           11.94            151         0      Not Applicable
  05/11/2026 11 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 12 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 01 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 02 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 03 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 04 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 05 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 06 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 07 AM PDT           11.94            151         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/12/2026 08 AM PDT           11.94            151                Not Applicable
  05/12/2026 09 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 10 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 11 AM PDT           11.94            151         0      Not Applicable
  05/12/2026 12 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 01 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 02 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 03 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 04 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 05 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 06 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 07 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 08 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 09 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 10 PM PDT           11.94            151         0      Not Applicable
  05/12/2026 11 PM PDT           11.94            151         0      Not Applicable
  05/13/2026 12 AM PDT           11.94            151         0      Not Applicable
  05/13/2026 01 AM PDT           11.94            151         0      Not Applicable
  05/13/2026 02 AM PDT           11.94            151         0      Not Applicable
  05/13/2026 03 AM PDT           11.94            151         0      Not Applicable
  05/13/2026 04 AM PDT           11.93            147         -      Not Applicable
  05/13/2026 05 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 06 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 07 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 08 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 09 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 10 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 11 AM PDT           11.93            147         0      Not Applicable
  05/13/2026 12 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 01 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 02 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 03 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 04 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 05 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 06 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 07 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 08 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 09 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 10 PM PDT           11.93            147         0      Not Applicable
  05/13/2026 11 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 12 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 01 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 02 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 03 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 04 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 05 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 06 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 07 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 08 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 09 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 10 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 11 AM PDT           11.93            147         0      Not Applicable
  05/14/2026 12 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 01 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 02 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 03 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 04 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 05 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 06 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 07 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 08 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 09 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 10 PM PDT           11.93            147         0      Not Applicable
  05/14/2026 11 PM PDT           11.93            147         0      Not Applicable
  05/15/2026 12 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 01 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 02 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 03 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 04 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 05 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 06 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 07 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 08 AM PDT           11.93            147         0      Not Applicable
  05/15/2026 09 AM PDT           11.92            142         -      Not Applicable
  05/15/2026 10 AM PDT           11.92            142         0      Not Applicable
  05/15/2026 11 AM PDT           11.92            142         0      Not Applicable
  05/15/2026 12 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 01 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 02 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 03 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 04 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 05 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 06 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 07 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 08 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 09 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 10 PM PDT           11.92            142         0      Not Applicable
  05/15/2026 11 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 12 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 01 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 02 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 03 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 04 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 05 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 06 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 07 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 08 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 09 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 10 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 11 AM PDT           11.92            142         0      Not Applicable
  05/16/2026 12 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 01 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 02 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 03 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 04 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 05 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 06 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 07 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 08 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 09 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 10 PM PDT           11.92            142         0      Not Applicable
  05/16/2026 11 PM PDT           11.92            142         0      Not Applicable
  05/17/2026 12 AM PDT           11.92            142         0      Not Applicable
  05/17/2026 01 AM PDT           11.92            142         0      Not Applicable
  05/17/2026 02 AM PDT           11.92            142         0      Not Applicable
  05/17/2026 03 AM PDT           11.92            142         0      Not Applicable
  05/17/2026 04 AM PDT           11.92            142         0      Not Applicable
  05/17/2026 05 AM PDT           11.92            142         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.