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 09 2026 at 12:34 PM PDTNext Issuance: Mar 10 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:  03/09/2026 at 12:36 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/04/2026 at 01:00 PM PST
# Maximum Observed Stage:                       13.21 Feet
# Maximum Observed Flow:                        1260 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/09/2026 at 01:00 PM PDT
# Maximum Forecast Stage:                       12.76 Feet
# Maximum Forecast Flow:                        767 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/04/2026 11 AM PST           13.21           1260                Not Applicable
  03/04/2026 12 PM PST           13.20           1249         -      Not Applicable
  03/04/2026 01 PM PST           13.21           1260         +      Not Applicable
  03/04/2026 02 PM PST           13.19           1237         -      Not Applicable
  03/04/2026 03 PM PST           13.16           1202         -      Not Applicable
  03/04/2026 04 PM PST           13.20           1249         +      Not Applicable
  03/04/2026 05 PM PST           13.19           1237         -      Not Applicable
  03/04/2026 06 PM PST           13.19           1237         0      Not Applicable
  03/04/2026 07 PM PST           13.19           1237         0      Not Applicable
  03/04/2026 08 PM PST           13.18           1225         -      Not Applicable
  03/04/2026 09 PM PST           13.17           1214         -      Not Applicable
  03/04/2026 10 PM PST           13.16           1202         -      Not Applicable
  03/04/2026 11 PM PST           13.16           1202         0      Not Applicable
  03/05/2026 12 AM PST           13.15           1191         -      Not Applicable
  03/05/2026 01 AM PST           13.15           1191         0      Not Applicable
  03/05/2026 02 AM PST           13.14           1179         -      Not Applicable
  03/05/2026 03 AM PST           13.13           1168         -      Not Applicable
  03/05/2026 04 AM PST           13.11           1145         -      Not Applicable
  03/05/2026 05 AM PST           13.11           1145         0      Not Applicable
  03/05/2026 06 AM PST           13.11           1145         0      Not Applicable
  03/05/2026 07 AM PST           13.11           1145         0      Not Applicable
  03/05/2026 08 AM PST           13.11           1145         0      Not Applicable
  03/05/2026 09 AM PST           13.10           1133         -      Not Applicable
  03/05/2026 10 AM PST           13.09           1122         -      Not Applicable
  03/05/2026 11 AM PST           13.08           1110         -      Not Applicable
  03/05/2026 12 PM PST           13.07           1099         -      Not Applicable
  03/05/2026 01 PM PST           13.07           1099         0      Not Applicable
  03/05/2026 02 PM PST           13.08           1110         +      Not Applicable
  03/05/2026 03 PM PST           13.07           1099         -      Not Applicable
  03/05/2026 04 PM PST           13.06           1088         -      Not Applicable
  03/05/2026 05 PM PST           13.06           1088         0      Not Applicable
  03/05/2026 06 PM PST           13.07           1099         +      Not Applicable
  03/05/2026 07 PM PST           13.05           1076         -      Not Applicable
  03/05/2026 08 PM PST           13.04           1065         -      Not Applicable
  03/05/2026 09 PM PST           13.05           1076         +      Not Applicable
  03/05/2026 10 PM PST           13.04           1065         -      Not Applicable
  03/05/2026 11 PM PST           13.03           1054         -      Not Applicable
  03/06/2026 12 AM PST           13.03           1054         0      Not Applicable
  03/06/2026 01 AM PST           13.04           1065         +      Not Applicable
  03/06/2026 02 AM PST           13.02           1042         -      Not Applicable
  03/06/2026 03 AM PST           13.02           1042         0      Not Applicable
  03/06/2026 04 AM PST           13.00           1020         -      Not Applicable
  03/06/2026 05 AM PST           13.01           1031         +      Not Applicable
  03/06/2026 06 AM PST           13.01           1031         0      Not Applicable
  03/06/2026 07 AM PST           13.00           1020         -      Not Applicable
  03/06/2026 08 AM PST           13.00           1020         0      Not Applicable
  03/06/2026 09 AM PST           12.99           1009         -      Not Applicable
  03/06/2026 10 AM PST           12.99           1009         0      Not Applicable
  03/06/2026 11 AM PST           12.99           1009         0      Not Applicable
  03/06/2026 12 PM PST           12.97            986         -      Not Applicable
  03/06/2026 01 PM PST           12.97            986         0      Not Applicable
  03/06/2026 02 PM PST           12.97            986         0      Not Applicable
  03/06/2026 03 PM PST           12.98            998         +      Not Applicable
  03/06/2026 04 PM PST           12.96            975         -      Not Applicable
  03/06/2026 05 PM PST           12.96            975         0      Not Applicable
  03/06/2026 06 PM PST           12.95            964         -      Not Applicable
  03/06/2026 07 PM PST           12.94            953         -      Not Applicable
  03/06/2026 08 PM PST           12.93            942         -      Not Applicable
  03/06/2026 09 PM PST           12.94            953         +      Not Applicable
  03/06/2026 10 PM PST           12.95            964         +      Not Applicable
  03/06/2026 11 PM PST           12.94            953         -      Not Applicable
  03/07/2026 12 AM PST           12.92            931         -      Not Applicable
  03/07/2026 01 AM PST           12.94            953         +      Not Applicable
  03/07/2026 02 AM PST           12.93            942         -      Not Applicable
  03/07/2026 03 AM PST           12.93            942         0      Not Applicable
  03/07/2026 04 AM PST           12.92            931         -      Not Applicable
  03/07/2026 05 AM PST           12.92            931         0      Not Applicable
  03/07/2026 06 AM PST           12.92            931         0      Not Applicable
  03/07/2026 07 AM PST           12.91            920         -      Not Applicable
  03/07/2026 08 AM PST           12.91            920         0      Not Applicable
  03/07/2026 09 AM PST           12.91            920         0      Not Applicable
  03/07/2026 10 AM PST           12.90            909         -      Not Applicable
  03/07/2026 11 AM PST           12.91            920         +      Not Applicable
  03/07/2026 12 PM PST           12.90            909         -      Not Applicable
  03/07/2026 01 PM PST           12.90            909         0      Not Applicable
  03/07/2026 02 PM PST           12.90            909         0      Not Applicable
  03/07/2026 03 PM PST           12.89            898         -      Not Applicable
  03/07/2026 04 PM PST           12.88            887         -      Not Applicable
  03/07/2026 05 PM PST           12.89            898         +      Not Applicable
  03/07/2026 06 PM PST           12.88            887         -      Not Applicable
  03/07/2026 07 PM PST           12.87            876         -      Not Applicable
  03/07/2026 08 PM PST           12.87            876         0      Not Applicable
  03/07/2026 09 PM PST           12.87            876         0      Not Applicable
  03/07/2026 10 PM PST           12.86            865         -      Not Applicable
  03/07/2026 11 PM PST           12.87            876         +      Not Applicable
  03/08/2026 12 AM PST           12.87            876         0      Not Applicable
  03/08/2026 01 AM PST           12.86            865         -      Not Applicable
  03/08/2026 03 AM PDT           12.84            843         -      Not Applicable
  03/08/2026 04 AM PDT           12.86            865         +      Not Applicable
  03/08/2026 05 AM PDT           12.85            854         -      Not Applicable
  03/08/2026 06 AM PDT           12.84            843         -      Not Applicable
  03/08/2026 07 AM PDT           12.85            854         +      Not Applicable
  03/08/2026 08 AM PDT           12.84            843         -      Not Applicable
  03/08/2026 09 AM PDT           12.84            843         0      Not Applicable
  03/08/2026 10 AM PDT           12.84            843         0      Not Applicable
  03/08/2026 11 AM PDT           12.84            843         0      Not Applicable
  03/08/2026 12 PM PDT           12.83            832         -      Not Applicable
  03/08/2026 01 PM PDT           12.83            832         0      Not Applicable
  03/08/2026 02 PM PDT           12.82            821         -      Not Applicable
  03/08/2026 03 PM PDT           12.82            821         0      Not Applicable
  03/08/2026 04 PM PDT           12.82            821         0      Not Applicable
  03/08/2026 05 PM PDT           12.81            811         -      Not Applicable
  03/08/2026 06 PM PDT           12.82            821         +      Not Applicable
  03/08/2026 07 PM PDT           12.81            811         -      Not Applicable
  03/08/2026 08 PM PDT           12.80            800         -      Not Applicable
  03/08/2026 09 PM PDT           12.80            800         0      Not Applicable
  03/08/2026 10 PM PDT           12.81            811         +      Not Applicable
  03/08/2026 11 PM PDT           12.78            783         -      Not Applicable
  03/09/2026 12 AM PDT           12.80            800         +      Not Applicable
  03/09/2026 01 AM PDT           12.80            800         0      Not Applicable
  03/09/2026 02 AM PDT           12.80            800         0      Not Applicable
  03/09/2026 03 AM PDT           12.78            783         -      Not Applicable
  03/09/2026 04 AM PDT           12.79            792         +      Not Applicable
  03/09/2026 05 AM PDT           12.79            792         0      Not Applicable
  03/09/2026 06 AM PDT           12.77            775         -      Not Applicable
  03/09/2026 07 AM PDT           12.78            783         +      Not Applicable
  03/09/2026 08 AM PDT           12.78            783         0      Not Applicable
  03/09/2026 09 AM PDT           12.77            775         -      Not Applicable
  03/09/2026 10 AM PDT           12.77            775         0      Not Applicable
  03/09/2026 11 AM PDT           12.77            775         0      Not Applicable
  03/09/2026 12 PM PDT           12.76            767         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/09/2026 01 PM PDT           12.76            767                Not Applicable
  03/09/2026 02 PM PDT           12.76            767         0      Not Applicable
  03/09/2026 03 PM PDT           12.76            767         0      Not Applicable
  03/09/2026 04 PM PDT           12.75            758         -      Not Applicable
  03/09/2026 05 PM PDT           12.75            758         0      Not Applicable
  03/09/2026 06 PM PDT           12.75            758         0      Not Applicable
  03/09/2026 07 PM PDT           12.74            750         -      Not Applicable
  03/09/2026 08 PM PDT           12.74            750         0      Not Applicable
  03/09/2026 09 PM PDT           12.74            750         0      Not Applicable
  03/09/2026 10 PM PDT           12.74            750         0      Not Applicable
  03/09/2026 11 PM PDT           12.73            742         -      Not Applicable
  03/10/2026 12 AM PDT           12.73            742         0      Not Applicable
  03/10/2026 01 AM PDT           12.73            742         0      Not Applicable
  03/10/2026 02 AM PDT           12.72            734         -      Not Applicable
  03/10/2026 03 AM PDT           12.72            734         0      Not Applicable
  03/10/2026 04 AM PDT           12.72            734         0      Not Applicable
  03/10/2026 05 AM PDT           12.72            734         0      Not Applicable
  03/10/2026 06 AM PDT           12.71            726         -      Not Applicable
  03/10/2026 07 AM PDT           12.71            726         0      Not Applicable
  03/10/2026 08 AM PDT           12.71            726         0      Not Applicable
  03/10/2026 09 AM PDT           12.71            726         0      Not Applicable
  03/10/2026 10 AM PDT           12.70            717         -      Not Applicable
  03/10/2026 11 AM PDT           12.70            717         0      Not Applicable
  03/10/2026 12 PM PDT           12.70            717         0      Not Applicable
  03/10/2026 01 PM PDT           12.69            709         -      Not Applicable
  03/10/2026 02 PM PDT           12.69            709         0      Not Applicable
  03/10/2026 03 PM PDT           12.69            709         0      Not Applicable
  03/10/2026 04 PM PDT           12.69            709         0      Not Applicable
  03/10/2026 05 PM PDT           12.68            701         -      Not Applicable
  03/10/2026 06 PM PDT           12.68            701         0      Not Applicable
  03/10/2026 07 PM PDT           12.68            701         0      Not Applicable
  03/10/2026 08 PM PDT           12.68            701         0      Not Applicable
  03/10/2026 09 PM PDT           12.67            693         -      Not Applicable
  03/10/2026 10 PM PDT           12.67            693         0      Not Applicable
  03/10/2026 11 PM PDT           12.67            693         0      Not Applicable
  03/11/2026 12 AM PDT           12.67            693         0      Not Applicable
  03/11/2026 01 AM PDT           12.66            685         -      Not Applicable
  03/11/2026 02 AM PDT           12.66            685         0      Not Applicable
  03/11/2026 03 AM PDT           12.66            685         0      Not Applicable
  03/11/2026 04 AM PDT           12.66            685         0      Not Applicable
  03/11/2026 05 AM PDT           12.65            677         -      Not Applicable
  03/11/2026 06 AM PDT           12.65            677         0      Not Applicable
  03/11/2026 07 AM PDT           12.65            677         0      Not Applicable
  03/11/2026 08 AM PDT           12.65            677         0      Not Applicable
  03/11/2026 09 AM PDT           12.64            669         -      Not Applicable
  03/11/2026 10 AM PDT           12.64            669         0      Not Applicable
  03/11/2026 11 AM PDT           12.64            669         0      Not Applicable
  03/11/2026 12 PM PDT           12.64            669         0      Not Applicable
  03/11/2026 01 PM PDT           12.64            669         0      Not Applicable
  03/11/2026 02 PM PDT           12.63            661         -      Not Applicable
  03/11/2026 03 PM PDT           12.63            661         0      Not Applicable
  03/11/2026 04 PM PDT           12.63            661         0      Not Applicable
  03/11/2026 05 PM PDT           12.63            661         0      Not Applicable
  03/11/2026 06 PM PDT           12.62            652         -      Not Applicable
  03/11/2026 07 PM PDT           12.62            652         0      Not Applicable
  03/11/2026 08 PM PDT           12.62            652         0      Not Applicable
  03/11/2026 09 PM PDT           12.62            652         0      Not Applicable
  03/11/2026 10 PM PDT           12.62            652         0      Not Applicable
  03/11/2026 11 PM PDT           12.61            644         -      Not Applicable
  03/12/2026 12 AM PDT           12.61            644         0      Not Applicable
  03/12/2026 01 AM PDT           12.61            644         0      Not Applicable
  03/12/2026 02 AM PDT           12.61            644         0      Not Applicable
  03/12/2026 03 AM PDT           12.61            644         0      Not Applicable
  03/12/2026 04 AM PDT           12.60            636         -      Not Applicable
  03/12/2026 05 AM PDT           12.60            636         0      Not Applicable
  03/12/2026 06 AM PDT           12.60            636         0      Not Applicable
  03/12/2026 07 AM PDT           12.60            636         0      Not Applicable
  03/12/2026 08 AM PDT           12.60            636         0      Not Applicable
  03/12/2026 09 AM PDT           12.59            628         -      Not Applicable
  03/12/2026 10 AM PDT           12.59            628         0      Not Applicable
  03/12/2026 11 AM PDT           12.59            628         0      Not Applicable
  03/12/2026 12 PM PDT           12.59            628         0      Not Applicable
  03/12/2026 01 PM PDT           12.59            628         0      Not Applicable
  03/12/2026 02 PM PDT           12.59            628         0      Not Applicable
  03/12/2026 03 PM PDT           12.59            628         0      Not Applicable
  03/12/2026 04 PM PDT           12.58            620         -      Not Applicable
  03/12/2026 05 PM PDT           12.58            620         0      Not Applicable
  03/12/2026 06 PM PDT           12.58            620         0      Not Applicable
  03/12/2026 07 PM PDT           12.58            620         0      Not Applicable
  03/12/2026 08 PM PDT           12.58            620         0      Not Applicable
  03/12/2026 09 PM PDT           12.57            612         -      Not Applicable
  03/12/2026 10 PM PDT           12.57            612         0      Not Applicable
  03/12/2026 11 PM PDT           12.57            612         0      Not Applicable
  03/13/2026 12 AM PDT           12.57            612         0      Not Applicable
  03/13/2026 01 AM PDT           12.57            612         0      Not Applicable
  03/13/2026 02 AM PDT           12.57            612         0      Not Applicable
  03/13/2026 03 AM PDT           12.57            612         0      Not Applicable
  03/13/2026 04 AM PDT           12.56            605         -      Not Applicable
  03/13/2026 05 AM PDT           12.56            605         0      Not Applicable
  03/13/2026 06 AM PDT           12.56            605         0      Not Applicable
  03/13/2026 07 AM PDT           12.56            605         0      Not Applicable
  03/13/2026 08 AM PDT           12.56            605         0      Not Applicable
  03/13/2026 09 AM PDT           12.56            605         0      Not Applicable
  03/13/2026 10 AM PDT           12.55            597         -      Not Applicable
  03/13/2026 11 AM PDT           12.55            597         0      Not Applicable
  03/13/2026 12 PM PDT           12.55            597         0      Not Applicable
  03/13/2026 01 PM PDT           12.55            597         0      Not Applicable
  03/13/2026 02 PM PDT           12.55            597         0      Not Applicable
  03/13/2026 03 PM PDT           12.55            597         0      Not Applicable
  03/13/2026 04 PM PDT           12.54            589         -      Not Applicable
  03/13/2026 05 PM PDT           12.54            589         0      Not Applicable
  03/13/2026 06 PM PDT           12.54            589         0      Not Applicable
  03/13/2026 07 PM PDT           12.54            589         0      Not Applicable
  03/13/2026 08 PM PDT           12.54            589         0      Not Applicable
  03/13/2026 09 PM PDT           12.54            589         0      Not Applicable
  03/13/2026 10 PM PDT           12.54            589         0      Not Applicable
  03/13/2026 11 PM PDT           12.54            589         0      Not Applicable
  03/14/2026 12 AM PDT           12.53            581         -      Not Applicable
  03/14/2026 01 AM PDT           12.53            581         0      Not Applicable
  03/14/2026 02 AM PDT           12.53            581         0      Not Applicable
  03/14/2026 03 AM PDT           12.53            581         0      Not Applicable
  03/14/2026 04 AM PDT           12.53            581         0      Not Applicable
  03/14/2026 05 AM PDT           12.53            581         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.