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: Apr 03 2026 at 7:46 AM PDTNext Issuance: Apr 03 2026 at 3:00 PM 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:  04/03/2026 at 07:49 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/02/2026 at 07:00 AM PDT
# Maximum Observed Stage:                       12.94 Feet
# Maximum Observed Flow:                        953 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/03/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       12.37 Feet
# Maximum Forecast Flow:                        455 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/29/2026 07 AM PDT           12.18            322                Not Applicable
  03/29/2026 08 AM PDT           12.18            322         0      Not Applicable
  03/29/2026 09 AM PDT           12.18            322         0      Not Applicable
  03/29/2026 10 AM PDT           12.18            322         0      Not Applicable
  03/29/2026 11 AM PDT           12.18            322         0      Not Applicable
  03/29/2026 12 PM PDT           12.19            328         +      Not Applicable
  03/29/2026 01 PM PDT           12.18            322         -      Not Applicable
  03/29/2026 02 PM PDT           12.18            322         0      Not Applicable
  03/29/2026 03 PM PDT           12.19            328         +      Not Applicable
  03/29/2026 04 PM PDT           12.18            322         -      Not Applicable
  03/29/2026 05 PM PDT           12.18            322         0      Not Applicable
  03/29/2026 06 PM PDT           12.18            322         0      Not Applicable
  03/29/2026 07 PM PDT           12.18            322         0      Not Applicable
  03/29/2026 08 PM PDT           12.17            314         -      Not Applicable
  03/29/2026 09 PM PDT           12.17            314         0      Not Applicable
  03/29/2026 10 PM PDT           12.18            322         +      Not Applicable
  03/29/2026 11 PM PDT           12.17            314         -      Not Applicable
  03/30/2026 12 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 01 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 02 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 03 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 04 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 05 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 06 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 07 AM PDT           12.16            306         -      Not Applicable
  03/30/2026 08 AM PDT           12.16            306         0      Not Applicable
  03/30/2026 09 AM PDT           12.17            314         +      Not Applicable
  03/30/2026 10 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 11 AM PDT           12.17            314         0      Not Applicable
  03/30/2026 12 PM PDT           12.17            314         0      Not Applicable
  03/30/2026 01 PM PDT           12.17            314         0      Not Applicable
  03/30/2026 02 PM PDT           12.17            314         0      Not Applicable
  03/30/2026 03 PM PDT           12.17            314         0      Not Applicable
  03/30/2026 04 PM PDT           12.17            314         0      Not Applicable
  03/30/2026 05 PM PDT           12.16            306         -      Not Applicable
  03/30/2026 06 PM PDT           12.16            306         0      Not Applicable
  03/30/2026 07 PM PDT           12.16            306         0      Not Applicable
  03/30/2026 08 PM PDT           12.16            306         0      Not Applicable
  03/30/2026 09 PM PDT           12.16            306         0      Not Applicable
  03/30/2026 10 PM PDT           12.16            306         0      Not Applicable
  03/30/2026 11 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 12 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 01 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 02 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 03 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 04 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 05 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 06 AM PDT           12.15            298         -      Not Applicable
  03/31/2026 07 AM PDT           12.16            306         +      Not Applicable
  03/31/2026 08 AM PDT           12.16            306         0      Not Applicable
  03/31/2026 09 AM PDT           12.15            298         -      Not Applicable
  03/31/2026 10 AM PDT           12.15            298         0      Not Applicable
  03/31/2026 11 AM PDT           12.16            306         +      Not Applicable
  03/31/2026 12 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 01 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 02 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 03 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 04 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 05 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 06 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 07 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 08 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 09 PM PDT           12.16            306         0      Not Applicable
  03/31/2026 10 PM PDT           12.15            298         -      Not Applicable
  03/31/2026 11 PM PDT           12.15            298         0      Not Applicable
  04/01/2026 12 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 01 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 02 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 03 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 04 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 05 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 06 AM PDT           12.15            298         0      Not Applicable
  04/01/2026 07 AM PDT           12.16            306         +      Not Applicable
  04/01/2026 08 AM PDT           12.16            306         0      Not Applicable
  04/01/2026 09 AM PDT           12.16            306         0      Not Applicable
  04/01/2026 10 AM PDT           12.16            306         0      Not Applicable
  04/01/2026 11 AM PDT           12.16            306         0      Not Applicable
  04/01/2026 12 PM PDT           12.18            322         +      Not Applicable
  04/01/2026 01 PM PDT           12.20            334         +      Not Applicable
  04/01/2026 02 PM PDT           12.23            354         +      Not Applicable
  04/01/2026 03 PM PDT           12.26            374         +      Not Applicable
  04/01/2026 04 PM PDT           12.31            410         +      Not Applicable
  04/01/2026 05 PM PDT           12.37            455         +      Not Applicable
  04/01/2026 06 PM PDT           12.42            496         +      Not Applicable
  04/01/2026 07 PM PDT           12.47            534         +      Not Applicable
  04/01/2026 08 PM PDT           12.51            565         +      Not Applicable
  04/01/2026 09 PM PDT           12.57            612         +      Not Applicable
  04/01/2026 10 PM PDT           12.61            644         +      Not Applicable
  04/01/2026 11 PM PDT           12.68            701         +      Not Applicable
  04/02/2026 12 AM PDT           12.79            792         +      Not Applicable
  04/02/2026 01 AM PDT           12.87            876         +      Not Applicable
  04/02/2026 02 AM PDT           12.85            854         -      Not Applicable
  04/02/2026 03 AM PDT           12.84            843         -      Not Applicable
  04/02/2026 04 AM PDT           12.83            832         -      Not Applicable
  04/02/2026 05 AM PDT           12.82            821         -      Not Applicable
  04/02/2026 06 AM PDT           12.88            887         +      Not Applicable
  04/02/2026 07 AM PDT           12.94            953         +      Not Applicable
  04/02/2026 08 AM PDT           12.92            931         -      Not Applicable
  04/02/2026 09 AM PDT           12.87            876         -      Not Applicable
  04/02/2026 10 AM PDT           12.82            821         -      Not Applicable
  04/02/2026 11 AM PDT           12.79            792         -      Not Applicable
  04/02/2026 12 PM PDT           12.75            758         -      Not Applicable
  04/02/2026 01 PM PDT           12.72            734         -      Not Applicable
  04/02/2026 02 PM PDT           12.68            701         -      Not Applicable
  04/02/2026 03 PM PDT           12.65            677         -      Not Applicable
  04/02/2026 04 PM PDT           12.63            661         -      Not Applicable
  04/02/2026 05 PM PDT           12.60            636         -      Not Applicable
  04/02/2026 06 PM PDT           12.58            620         -      Not Applicable
  04/02/2026 07 PM PDT           12.56            605         -      Not Applicable
  04/02/2026 08 PM PDT           12.54            589         -      Not Applicable
  04/02/2026 09 PM PDT           12.52            573         -      Not Applicable
  04/02/2026 10 PM PDT           12.51            565         -      Not Applicable
  04/02/2026 11 PM PDT           12.49            550         -      Not Applicable
  04/03/2026 12 AM PDT           12.48            542         -      Not Applicable
  04/03/2026 01 AM PDT           12.46            526         -      Not Applicable
  04/03/2026 02 AM PDT           12.45            519         -      Not Applicable
  04/03/2026 03 AM PDT           12.44            511         -      Not Applicable
  04/03/2026 04 AM PDT           12.42            496         -      Not Applicable
  04/03/2026 05 AM PDT           12.41            488         -      Not Applicable
  04/03/2026 06 AM PDT           12.40            480         -      Not Applicable
  04/03/2026 07 AM PDT           12.38            463         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/03/2026 08 AM PDT           12.37            455                Not Applicable
  04/03/2026 09 AM PDT           12.36            448         -      Not Applicable
  04/03/2026 10 AM PDT           12.35            440         -      Not Applicable
  04/03/2026 11 AM PDT           12.33            425         -      Not Applicable
  04/03/2026 12 PM PDT           12.32            417         -      Not Applicable
  04/03/2026 01 PM PDT           12.31            410         -      Not Applicable
  04/03/2026 02 PM PDT           12.30            402         -      Not Applicable
  04/03/2026 03 PM PDT           12.29            395         -      Not Applicable
  04/03/2026 04 PM PDT           12.27            381         -      Not Applicable
  04/03/2026 05 PM PDT           12.26            374         -      Not Applicable
  04/03/2026 06 PM PDT           12.25            367         -      Not Applicable
  04/03/2026 07 PM PDT           12.24            360         -      Not Applicable
  04/03/2026 08 PM PDT           12.23            354         -      Not Applicable
  04/03/2026 09 PM PDT           12.22            347         -      Not Applicable
  04/03/2026 10 PM PDT           12.21            341         -      Not Applicable
  04/03/2026 11 PM PDT           12.19            328         -      Not Applicable
  04/04/2026 12 AM PDT           12.18            322         -      Not Applicable
  04/04/2026 01 AM PDT           12.17            314         -      Not Applicable
  04/04/2026 02 AM PDT           12.16            306         -      Not Applicable
  04/04/2026 03 AM PDT           12.15            298         -      Not Applicable
  04/04/2026 04 AM PDT           12.14            291         -      Not Applicable
  04/04/2026 05 AM PDT           12.14            291         0      Not Applicable
  04/04/2026 06 AM PDT           12.13            283         -      Not Applicable
  04/04/2026 07 AM PDT           12.13            283         0      Not Applicable
  04/04/2026 08 AM PDT           12.13            283         0      Not Applicable
  04/04/2026 09 AM PDT           12.13            283         0      Not Applicable
  04/04/2026 10 AM PDT           12.13            283         0      Not Applicable
  04/04/2026 11 AM PDT           12.13            283         0      Not Applicable
  04/04/2026 12 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 01 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 02 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 03 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 04 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 05 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 06 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 07 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 08 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 09 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 10 PM PDT           12.13            283         0      Not Applicable
  04/04/2026 11 PM PDT           12.13            283         0      Not Applicable
  04/05/2026 12 AM PDT           12.12            276         -      Not Applicable
  04/05/2026 01 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 02 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 03 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 04 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 05 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 06 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 07 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 08 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 09 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 10 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 11 AM PDT           12.12            276         0      Not Applicable
  04/05/2026 12 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 01 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 02 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 03 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 04 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 05 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 06 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 07 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 08 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 09 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 10 PM PDT           12.12            276         0      Not Applicable
  04/05/2026 11 PM PDT           12.12            276         0      Not Applicable
  04/06/2026 12 AM PDT           12.12            276         0      Not Applicable
  04/06/2026 01 AM PDT           12.12            276         0      Not Applicable
  04/06/2026 02 AM PDT           12.11            269         -      Not Applicable
  04/06/2026 03 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 04 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 05 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 06 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 07 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 08 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 09 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 10 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 11 AM PDT           12.11            269         0      Not Applicable
  04/06/2026 12 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 01 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 02 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 03 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 04 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 05 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 06 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 07 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 08 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 09 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 10 PM PDT           12.11            269         0      Not Applicable
  04/06/2026 11 PM PDT           12.11            269         0      Not Applicable
  04/07/2026 12 AM PDT           12.11            269         0      Not Applicable
  04/07/2026 01 AM PDT           12.11            269         0      Not Applicable
  04/07/2026 02 AM PDT           12.11            269         0      Not Applicable
  04/07/2026 03 AM PDT           12.11            269         0      Not Applicable
  04/07/2026 04 AM PDT           12.10            262         -      Not Applicable
  04/07/2026 05 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 06 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 07 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 08 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 09 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 10 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 11 AM PDT           12.10            262         0      Not Applicable
  04/07/2026 12 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 01 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 02 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 03 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 04 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 05 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 06 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 07 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 08 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 09 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 10 PM PDT           12.10            262         0      Not Applicable
  04/07/2026 11 PM PDT           12.10            262         0      Not Applicable
  04/08/2026 12 AM PDT           12.10            262         0      Not Applicable
  04/08/2026 01 AM PDT           12.10            262         0      Not Applicable
  04/08/2026 02 AM PDT           12.10            262         0      Not Applicable
  04/08/2026 03 AM PDT           12.10            262         0      Not Applicable
  04/08/2026 04 AM PDT           12.10            262         0      Not Applicable
  04/08/2026 05 AM PDT           12.10            262         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.