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: Sep 07 2026 at 7:26 AM PDTNext Issuance: Sep 08 2026 at 9:00 AM PDT
Action: 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:  09/07/2026 at 07:27 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  09/04/2026 at 03:00 AM PDT
# Maximum Observed Stage:                       11.90 Feet
# Maximum Observed Flow:                        183 cfs
#
# Earliest Date & Time of Maximum Forecast:     09/07/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       11.35 Feet
# Maximum Forecast Flow:                        46 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  09/02/2026 07 AM PDT           11.05             17                Not Applicable
  09/02/2026 08 AM PDT           11.05             17         0      Not Applicable
  09/02/2026 09 AM PDT           11.05             17         0      Not Applicable
  09/02/2026 10 AM PDT           11.06             18         +      Not Applicable
  09/02/2026 11 AM PDT           11.06             18         0      Not Applicable
  09/02/2026 12 PM PDT           11.06             18         0      Not Applicable
  09/02/2026 01 PM PDT           11.06             18         0      Not Applicable
  09/02/2026 02 PM PDT           11.07             19         +      Not Applicable
  09/02/2026 03 PM PDT           11.08             20         +      Not Applicable
  09/02/2026 04 PM PDT           11.09             21         +      Not Applicable
  09/02/2026 05 PM PDT           11.11             24         +      Not Applicable
  09/02/2026 06 PM PDT           11.15             28         +      Not Applicable
  09/02/2026 07 PM PDT           11.19             31         +      Not Applicable
  09/02/2026 08 PM PDT           11.23             34         +      Not Applicable
  09/02/2026 09 PM PDT           11.26             37         +      Not Applicable
  09/02/2026 10 PM PDT           11.28             39         +      Not Applicable
  09/02/2026 11 PM PDT           11.32             43         +      Not Applicable
  09/03/2026 12 AM PDT           11.36             48         +      Not Applicable
  09/03/2026 01 AM PDT           11.41             54         +      Not Applicable
  09/03/2026 02 AM PDT           11.44             57         +      Not Applicable
  09/03/2026 03 AM PDT           11.46             60         +      Not Applicable
  09/03/2026 04 AM PDT           11.46             60         0      Not Applicable
  09/03/2026 05 AM PDT           11.45             59         -      Not Applicable
  09/03/2026 06 AM PDT           11.45             59         0      Not Applicable
  09/03/2026 07 AM PDT           11.48             63         +      Not Applicable
  09/03/2026 08 AM PDT           11.55             73         +      Not Applicable
  09/03/2026 09 AM PDT           11.62             84         +      Not Applicable
  09/03/2026 10 AM PDT           11.63             86         +      Not Applicable
  09/03/2026 11 AM PDT           11.62             84         -      Not Applicable
  09/03/2026 12 PM PDT           11.60             81         -      Not Applicable
  09/03/2026 01 PM PDT           11.59             79         -      Not Applicable
  09/03/2026 02 PM PDT           11.66             91         +      Not Applicable
  09/03/2026 03 PM PDT           11.76            122         +      Not Applicable
  09/03/2026 04 PM PDT           11.77            126         +      Not Applicable
  09/03/2026 05 PM PDT           11.76            122         -      Not Applicable
  09/03/2026 06 PM PDT           11.74            115         -      Not Applicable
  09/03/2026 07 PM PDT           11.72            108         -      Not Applicable
  09/03/2026 08 PM PDT           11.70            102         -      Not Applicable
  09/03/2026 09 PM PDT           11.68             95         -      Not Applicable
  09/03/2026 10 PM PDT           11.66             91         -      Not Applicable
  09/03/2026 11 PM PDT           11.65             89         -      Not Applicable
  09/04/2026 12 AM PDT           11.76            122         +      Not Applicable
  09/04/2026 01 AM PDT           11.88            173         +      Not Applicable
  09/04/2026 02 AM PDT           11.90            183         +      Not Applicable
  09/04/2026 03 AM PDT           11.90            183         0      Not Applicable
  09/04/2026 04 AM PDT           11.89            178         -      Not Applicable
  09/04/2026 05 AM PDT           11.88            173         -      Not Applicable
  09/04/2026 06 AM PDT           11.87            168         -      Not Applicable
  09/04/2026 07 AM PDT           11.86            164         -      Not Applicable
  09/04/2026 08 AM PDT           11.85            159         -      Not Applicable
  09/04/2026 09 AM PDT           11.83            150         -      Not Applicable
  09/04/2026 10 AM PDT           11.83            150         0      Not Applicable
  09/04/2026 11 AM PDT           11.81            142         -      Not Applicable
  09/04/2026 12 PM PDT           11.80            138         -      Not Applicable
  09/04/2026 01 PM PDT           11.79            134         -      Not Applicable
  09/04/2026 02 PM PDT           11.78            130         -      Not Applicable
  09/04/2026 03 PM PDT           11.77            126         -      Not Applicable
  09/04/2026 04 PM PDT           11.76            122         -      Not Applicable
  09/04/2026 05 PM PDT           11.75            119         -      Not Applicable
  09/04/2026 06 PM PDT           11.74            115         -      Not Applicable
  09/04/2026 07 PM PDT           11.73            112         -      Not Applicable
  09/04/2026 08 PM PDT           11.72            108         -      Not Applicable
  09/04/2026 09 PM PDT           11.71            105         -      Not Applicable
  09/04/2026 10 PM PDT           11.70            102         -      Not Applicable
  09/04/2026 11 PM PDT           11.69             98         -      Not Applicable
  09/05/2026 12 AM PDT           11.68             95         -      Not Applicable
  09/05/2026 01 AM PDT           11.68             95         0      Not Applicable
  09/05/2026 02 AM PDT           11.66             91         -      Not Applicable
  09/05/2026 03 AM PDT           11.66             91         0      Not Applicable
  09/05/2026 04 AM PDT           11.65             89         -      Not Applicable
  09/05/2026 05 AM PDT           11.64             88         -      Not Applicable
  09/05/2026 06 AM PDT           11.63             86         -      Not Applicable
  09/05/2026 07 AM PDT           11.62             84         -      Not Applicable
  09/05/2026 08 AM PDT           11.61             82         -      Not Applicable
  09/05/2026 09 AM PDT           11.61             82         0      Not Applicable
  09/05/2026 10 AM PDT           11.59             79         -      Not Applicable
  09/05/2026 11 AM PDT           11.58             78         -      Not Applicable
  09/05/2026 12 PM PDT           11.58             78         0      Not Applicable
  09/05/2026 01 PM PDT           11.57             76         -      Not Applicable
  09/05/2026 02 PM PDT           11.57             76         0      Not Applicable
  09/05/2026 03 PM PDT           11.55             73         -      Not Applicable
  09/05/2026 04 PM PDT           11.55             73         0      Not Applicable
  09/05/2026 05 PM PDT           11.55             73         0      Not Applicable
  09/05/2026 06 PM PDT           11.54             71         -      Not Applicable
  09/05/2026 07 PM PDT           11.52             68         -      Not Applicable
  09/05/2026 08 PM PDT           11.52             68         0      Not Applicable
  09/05/2026 09 PM PDT           11.51             67         -      Not Applicable
  09/05/2026 10 PM PDT           11.50             65         -      Not Applicable
  09/05/2026 11 PM PDT           11.50             65         0      Not Applicable
  09/06/2026 12 AM PDT           11.49             64         -      Not Applicable
  09/06/2026 01 AM PDT           11.49             64         0      Not Applicable
  09/06/2026 02 AM PDT           11.48             63         -      Not Applicable
  09/06/2026 03 AM PDT           11.47             61         -      Not Applicable
  09/06/2026 04 AM PDT           11.47             61         0      Not Applicable
  09/06/2026 05 AM PDT           11.46             60         -      Not Applicable
  09/06/2026 06 AM PDT           11.46             60         0      Not Applicable
  09/06/2026 07 AM PDT           11.45             59         -      Not Applicable
  09/06/2026 08 AM PDT           11.45             59         0      Not Applicable
  09/06/2026 09 AM PDT           11.44             57         -      Not Applicable
  09/06/2026 10 AM PDT           11.43             56         -      Not Applicable
  09/06/2026 11 AM PDT           11.43             56         0      Not Applicable
  09/06/2026 12 PM PDT           11.42             55         -      Not Applicable
  09/06/2026 01 PM PDT           11.41             54         -      Not Applicable
  09/06/2026 02 PM PDT           11.42             55         +      Not Applicable
  09/06/2026 03 PM PDT           11.41             54         -      Not Applicable
  09/06/2026 04 PM PDT           11.41             54         0      Not Applicable
  09/06/2026 05 PM PDT           11.40             52         -      Not Applicable
  09/06/2026 06 PM PDT           11.40             52         0      Not Applicable
  09/06/2026 07 PM PDT           11.39             51         -      Not Applicable
  09/06/2026 08 PM PDT           11.39             51         0      Not Applicable
  09/06/2026 09 PM PDT           11.38             50         -      Not Applicable
  09/06/2026 10 PM PDT           11.38             50         0      Not Applicable
  09/06/2026 11 PM PDT           11.38             50         0      Not Applicable
  09/07/2026 12 AM PDT           11.38             50         0      Not Applicable
  09/07/2026 01 AM PDT           11.37             49         -      Not Applicable
  09/07/2026 02 AM PDT           11.36             48         -      Not Applicable
  09/07/2026 03 AM PDT           11.36             48         0      Not Applicable
  09/07/2026 04 AM PDT           11.36             48         0      Not Applicable
  09/07/2026 05 AM PDT           11.35             46         -      Not Applicable
  09/07/2026 06 AM PDT           11.35             46         0      Not Applicable
  09/07/2026 07 AM PDT           11.35             46         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  09/07/2026 08 AM PDT           11.35             46                Not Applicable
  09/07/2026 09 AM PDT           11.34             45         -      Not Applicable
  09/07/2026 10 AM PDT           11.34             45         0      Not Applicable
  09/07/2026 11 AM PDT           11.34             45         0      Not Applicable
  09/07/2026 12 PM PDT           11.34             45         0      Not Applicable
  09/07/2026 01 PM PDT           11.34             45         0      Not Applicable
  09/07/2026 02 PM PDT           11.34             45         0      Not Applicable
  09/07/2026 03 PM PDT           11.33             44         -      Not Applicable
  09/07/2026 04 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 05 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 06 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 07 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 08 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 09 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 10 PM PDT           11.33             44         0      Not Applicable
  09/07/2026 11 PM PDT           11.33             44         0      Not Applicable
  09/08/2026 12 AM PDT           11.33             44         0      Not Applicable
  09/08/2026 01 AM PDT           11.32             43         -      Not Applicable
  09/08/2026 02 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 03 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 04 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 05 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 06 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 07 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 08 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 09 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 10 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 11 AM PDT           11.32             43         0      Not Applicable
  09/08/2026 12 PM PDT           11.31             42         -      Not Applicable
  09/08/2026 01 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 02 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 03 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 04 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 05 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 06 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 07 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 08 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 09 PM PDT           11.31             42         0      Not Applicable
  09/08/2026 10 PM PDT           11.30             41         -      Not Applicable
  09/08/2026 11 PM PDT           11.30             41         0      Not Applicable
  09/09/2026 12 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 01 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 02 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 03 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 04 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 05 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 06 AM PDT           11.30             41         0      Not Applicable
  09/09/2026 07 AM PDT           11.29             40         -      Not Applicable
  09/09/2026 08 AM PDT           11.29             40         0      Not Applicable
  09/09/2026 09 AM PDT           11.29             40         0      Not Applicable
  09/09/2026 10 AM PDT           11.29             40         0      Not Applicable
  09/09/2026 11 AM PDT           11.29             40         0      Not Applicable
  09/09/2026 12 PM PDT           11.29             40         0      Not Applicable
  09/09/2026 01 PM PDT           11.29             40         0      Not Applicable
  09/09/2026 02 PM PDT           11.29             40         0      Not Applicable
  09/09/2026 03 PM PDT           11.29             40         0      Not Applicable
  09/09/2026 04 PM PDT           11.29             40         0      Not Applicable
  09/09/2026 05 PM PDT           11.28             39         -      Not Applicable
  09/09/2026 06 PM PDT           11.28             39         0      Not Applicable
  09/09/2026 07 PM PDT           11.28             39         0      Not Applicable
  09/09/2026 08 PM PDT           11.28             39         0      Not Applicable
  09/09/2026 09 PM PDT           11.28             39         0      Not Applicable
  09/09/2026 10 PM PDT           11.28             39         0      Not Applicable
  09/09/2026 11 PM PDT           11.28             39         0      Not Applicable
  09/10/2026 12 AM PDT           11.28             39         0      Not Applicable
  09/10/2026 01 AM PDT           11.28             39         0      Not Applicable
  09/10/2026 02 AM PDT           11.27             38         -      Not Applicable
  09/10/2026 03 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 04 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 05 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 06 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 07 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 08 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 09 AM PDT           11.27             38         0      Not Applicable
  09/10/2026 10 AM PDT           11.26             37         -      Not Applicable
  09/10/2026 11 AM PDT           11.26             37         0      Not Applicable
  09/10/2026 12 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 01 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 02 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 03 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 04 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 05 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 06 PM PDT           11.26             37         0      Not Applicable
  09/10/2026 07 PM PDT           11.25             36         -      Not Applicable
  09/10/2026 08 PM PDT           11.25             36         0      Not Applicable
  09/10/2026 09 PM PDT           11.25             36         0      Not Applicable
  09/10/2026 10 PM PDT           11.25             36         0      Not Applicable
  09/10/2026 11 PM PDT           11.25             36         0      Not Applicable
  09/11/2026 12 AM PDT           11.25             36         0      Not Applicable
  09/11/2026 01 AM PDT           11.25             36         0      Not Applicable
  09/11/2026 02 AM PDT           11.25             36         0      Not Applicable
  09/11/2026 03 AM PDT           11.24             35         -      Not Applicable
  09/11/2026 04 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 05 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 06 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 07 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 08 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 09 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 10 AM PDT           11.24             35         0      Not Applicable
  09/11/2026 11 AM PDT           11.23             34         -      Not Applicable
  09/11/2026 12 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 01 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 02 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 03 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 04 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 05 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 06 PM PDT           11.23             34         0      Not Applicable
  09/11/2026 07 PM PDT           11.22             33         -      Not Applicable
  09/11/2026 08 PM PDT           11.22             33         0      Not Applicable
  09/11/2026 09 PM PDT           11.22             33         0      Not Applicable
  09/11/2026 10 PM PDT           11.22             33         0      Not Applicable
  09/11/2026 11 PM PDT           11.22             33         0      Not Applicable
  09/12/2026 12 AM PDT           11.22             33         0      Not Applicable
  09/12/2026 01 AM PDT           11.22             33         0      Not Applicable
  09/12/2026 02 AM PDT           11.22             33         0      Not Applicable
  09/12/2026 03 AM PDT           11.21             33         -      Not Applicable
  09/12/2026 04 AM PDT           11.21             33         0      Not Applicable
  09/12/2026 05 AM PDT           11.21             33         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.