MATTOLE RIVER - PETROLIA (MTOC1)
Latitude: 40.31º NLongitude: 124.28º WElevation: 40 Feet
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Dec 23 2025 at 8:07 PM PSTNext Issuance: Dec 24 2025 at 9:00 AM PST
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:  12/23/2025 at 08:11 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  12/21/2025 at 01:00 PM PST
# Maximum Observed Stage:                       26.29 Feet
# Maximum Observed Flow:                        30656 cfs
#
# Earliest Date & Time of Maximum Forecast:     12/24/2025 at 08:00 AM PST
# Maximum Forecast Stage:                       17.61 Feet
# Maximum Forecast Flow:                        8366 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  12/18/2025 08 PM PST           13.93           2247                Not Applicable
  12/18/2025 09 PM PST           13.91           2220         -      Not Applicable
  12/18/2025 10 PM PST           13.89           2193         -      Not Applicable
  12/18/2025 11 PM PST           13.88           2180         -      Not Applicable
  12/19/2025 12 AM PST           13.84           2127         -      Not Applicable
  12/19/2025 01 AM PST           13.83           2114         -      Not Applicable
  12/19/2025 02 AM PST           13.85           2140         +      Not Applicable
  12/19/2025 03 AM PST           13.84           2127         -      Not Applicable
  12/19/2025 04 AM PST           13.89           2193         +      Not Applicable
  12/19/2025 05 AM PST           13.95           2273         +      Not Applicable
  12/19/2025 06 AM PST           14.11           2491         +      Not Applicable
  12/19/2025 07 AM PST           14.41           2914         +      Not Applicable
  12/19/2025 08 AM PST           14.81           3506         +      Not Applicable
  12/19/2025 09 AM PST           15.34           4334         +      Not Applicable
  12/19/2025 10 AM PST           15.93           5310         +      Not Applicable
  12/19/2025 11 AM PST           16.50           6304         +      Not Applicable
  12/19/2025 12 PM PST           16.86           6955         +      Not Applicable
  12/19/2025 01 PM PST           17.51           8174         +      Not Applicable
  12/19/2025 02 PM PST           18.06           9247         +      Not Applicable
  12/19/2025 03 PM PST           18.48          10091         +      Not Applicable
  12/19/2025 04 PM PST           18.65          10438         +      Not Applicable
  12/19/2025 05 PM PST           18.93          11017         +      Not Applicable
  12/19/2025 06 PM PST           18.98          11121         +      Not Applicable
  12/19/2025 07 PM PST           18.91          10975         -      Not Applicable
  12/19/2025 08 PM PST           18.83          10809         -      Not Applicable
  12/19/2025 09 PM PST           18.74          10623         -      Not Applicable
  12/19/2025 10 PM PST           18.46          10050         -      Not Applicable
  12/19/2025 11 PM PST           18.18           9486         -      Not Applicable
  12/20/2025 12 AM PST           17.83           8794         -      Not Applicable
  12/20/2025 01 AM PST           17.56           8270         -      Not Applicable
  12/20/2025 02 AM PST           17.31           7793         -      Not Applicable
  12/20/2025 03 AM PST           17.04           7287         -      Not Applicable
  12/20/2025 04 AM PST           16.87           6973         -      Not Applicable
  12/20/2025 05 AM PST           16.72           6700         -      Not Applicable
  12/20/2025 06 AM PST           16.48           6268         -      Not Applicable
  12/20/2025 07 AM PST           16.37           6073         -      Not Applicable
  12/20/2025 08 AM PST           16.25           5862         -      Not Applicable
  12/20/2025 09 AM PST           16.04           5498         -      Not Applicable
  12/20/2025 10 AM PST           15.93           5310         -      Not Applicable
  12/20/2025 11 AM PST           15.87           5208         -      Not Applicable
  12/20/2025 12 PM PST           15.76           5023         -      Not Applicable
  12/20/2025 01 PM PST           15.62           4790         -      Not Applicable
  12/20/2025 02 PM PST           15.53           4642         -      Not Applicable
  12/20/2025 03 PM PST           15.47           4544         -      Not Applicable
  12/20/2025 04 PM PST           15.40           4430         -      Not Applicable
  12/20/2025 05 PM PST           15.28           4238         -      Not Applicable
  12/20/2025 06 PM PST           15.25           4190         -      Not Applicable
  12/20/2025 07 PM PST           15.22           4142         -      Not Applicable
  12/20/2025 08 PM PST           15.18           4079         -      Not Applicable
  12/20/2025 09 PM PST           15.13           4000         -      Not Applicable
  12/20/2025 10 PM PST           15.08           3921         -      Not Applicable
  12/20/2025 11 PM PST           15.03           3843         -      Not Applicable
  12/21/2025 12 AM PST           15.05           3875         +      Not Applicable
  12/21/2025 01 AM PST           15.08           3921         +      Not Applicable
  12/21/2025 02 AM PST           15.18           4079         +      Not Applicable
  12/21/2025 03 AM PST           15.38           4398         +      Not Applicable
  12/21/2025 04 AM PST           15.89           5242         +      Not Applicable
  12/21/2025 05 AM PST           16.77           6790         +      Not Applicable
  12/21/2025 06 AM PST           17.89           8912         +      Not Applicable
  12/21/2025 07 AM PST           19.31          11816         +      Not Applicable
  12/21/2025 08 AM PST           21.38          16763         +      Not Applicable
  12/21/2025 09 AM PST           23.16          21530         +      Not Applicable
  12/21/2025 10 AM PST           24.63          25705         +      Not Applicable
  12/21/2025 11 AM PST           25.23          27466         +      Not Applicable
  12/21/2025 12 PM PST           25.97          29683         +      Not Applicable
  12/21/2025 01 PM PST           26.29          30656         +      Not Applicable
  12/21/2025 02 PM PST           26.06          29956         -      Not Applicable
  12/21/2025 03 PM PST           25.89          29441         -      Not Applicable
  12/21/2025 04 PM PST           25.55          28419         -      Not Applicable
  12/21/2025 05 PM PST           25.56          28449         +      Not Applicable
  12/21/2025 06 PM PST           25.43          28061         -      Not Applicable
  12/21/2025 07 PM PST           25.19          27348         -      Not Applicable
  12/21/2025 08 PM PST           24.83          26288         -      Not Applicable
  12/21/2025 09 PM PST           24.48          25269         -      Not Applicable
  12/21/2025 10 PM PST           23.75          23181         -      Not Applicable
  12/21/2025 11 PM PST           23.37          22113         -      Not Applicable
  12/22/2025 12 AM PST           22.60          19995         -      Not Applicable
  12/22/2025 01 AM PST           22.08          18598         -      Not Applicable
  12/22/2025 02 AM PST           21.60          17334         -      Not Applicable
  12/22/2025 03 AM PST           21.24          16402         -      Not Applicable
  12/22/2025 04 AM PST           20.76          15182         -      Not Applicable
  12/22/2025 05 AM PST           20.43          14359         -      Not Applicable
  12/22/2025 06 AM PST           20.06          13452         -      Not Applicable
  12/22/2025 07 AM PST           19.80          12869         -      Not Applicable
  12/22/2025 08 AM PST           19.49          12200         -      Not Applicable
  12/22/2025 09 AM PST           19.24          11668         -      Not Applicable
  12/22/2025 10 AM PST           18.96          11079         -      Not Applicable
  12/22/2025 11 AM PST           18.66          10458         -      Not Applicable
  12/22/2025 12 PM PST           18.43           9989         -      Not Applicable
  12/22/2025 01 PM PST           18.22           9566         -      Not Applicable
  12/22/2025 02 PM PST           17.87           8872         -      Not Applicable
  12/22/2025 03 PM PST           17.91           8951         +      Not Applicable
  12/22/2025 04 PM PST           17.69           8521         -      Not Applicable
  12/22/2025 05 PM PST           17.53           8212         -      Not Applicable
  12/22/2025 06 PM PST           17.38           7926         -      Not Applicable
  12/22/2025 07 PM PST           17.28           7736         -      Not Applicable
  12/22/2025 08 PM PST           17.13           7455         -      Not Applicable
  12/22/2025 09 PM PST           16.95           7120         -      Not Applicable
  12/22/2025 10 PM PST           16.82           6882         -      Not Applicable
  12/22/2025 11 PM PST           16.78           6809         -      Not Applicable
  12/23/2025 12 AM PST           16.54           6375         -      Not Applicable
  12/23/2025 01 AM PST           16.50           6304         -      Not Applicable
  12/23/2025 02 AM PST           16.45           6215         -      Not Applicable
  12/23/2025 03 AM PST           16.29           5932         -      Not Applicable
  12/23/2025 04 AM PST           16.26           5880         -      Not Applicable
  12/23/2025 05 AM PST           16.14           5671         -      Not Applicable
  12/23/2025 06 AM PST           16.03           5481         -      Not Applicable
  12/23/2025 07 AM PST           15.94           5327         -      Not Applicable
  12/23/2025 08 AM PST           15.95           5344         +      Not Applicable
  12/23/2025 09 AM PST           15.92           5293         -      Not Applicable
  12/23/2025 10 AM PST           15.89           5242         -      Not Applicable
  12/23/2025 11 AM PST           15.86           5192         -      Not Applicable
  12/23/2025 12 PM PST           15.94           5327         +      Not Applicable
  12/23/2025 01 PM PST           15.84           5158         -      Not Applicable
  12/23/2025 02 PM PST           15.94           5327         +      Not Applicable
  12/23/2025 03 PM PST           15.88           5225         -      Not Applicable
  12/23/2025 04 PM PST           15.88           5225         0      Not Applicable
  12/23/2025 05 PM PST           16.03           5481         +      Not Applicable
  12/23/2025 06 PM PST           16.17           5723         +      Not Applicable
  12/23/2025 07 PM PST           16.21           5792         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  12/23/2025 08 PM PST           16.25           5862                Not Applicable
  12/23/2025 09 PM PST           16.32           5985         +      Not Applicable
  12/23/2025 10 PM PST           16.42           6161         +      Not Applicable
  12/23/2025 11 PM PST           16.54           6375         +      Not Applicable
  12/24/2025 12 AM PST           16.66           6591         +      Not Applicable
  12/24/2025 01 AM PST           16.80           6845         +      Not Applicable
  12/24/2025 02 AM PST           16.96           7139         +      Not Applicable
  12/24/2025 03 AM PST           17.12           7436         +      Not Applicable
  12/24/2025 04 AM PST           17.26           7699         +      Not Applicable
  12/24/2025 05 AM PST           17.39           7945         +      Not Applicable
  12/24/2025 06 AM PST           17.52           8193         +      Not Applicable
  12/24/2025 07 AM PST           17.59           8328         +      Not Applicable
  12/24/2025 08 AM PST           17.61           8366         +      Not Applicable
  12/24/2025 09 AM PST           17.59           8328         -      Not Applicable
  12/24/2025 10 AM PST           17.55           8251         -      Not Applicable
  12/24/2025 11 AM PST           17.50           8155         -      Not Applicable
  12/24/2025 12 PM PST           17.43           8021         -      Not Applicable
  12/24/2025 01 PM PST           17.34           7850         -      Not Applicable
  12/24/2025 02 PM PST           17.24           7661         -      Not Applicable
  12/24/2025 03 PM PST           17.14           7473         -      Not Applicable
  12/24/2025 04 PM PST           17.03           7268         -      Not Applicable
  12/24/2025 05 PM PST           16.92           7065         -      Not Applicable
  12/24/2025 06 PM PST           16.81           6863         -      Not Applicable
  12/24/2025 07 PM PST           16.73           6718         -      Not Applicable
  12/24/2025 08 PM PST           16.66           6591         -      Not Applicable
  12/24/2025 09 PM PST           16.61           6501         -      Not Applicable
  12/24/2025 10 PM PST           16.58           6447         -      Not Applicable
  12/24/2025 11 PM PST           16.56           6411         -      Not Applicable
  12/25/2025 12 AM PST           16.55           6393         -      Not Applicable
  12/25/2025 01 AM PST           16.56           6411         +      Not Applicable
  12/25/2025 02 AM PST           16.59           6465         +      Not Applicable
  12/25/2025 03 AM PST           16.64           6555         +      Not Applicable
  12/25/2025 04 AM PST           16.69           6645         +      Not Applicable
  12/25/2025 05 AM PST           16.74           6736         +      Not Applicable
  12/25/2025 06 AM PST           16.80           6845         +      Not Applicable
  12/25/2025 07 AM PST           16.85           6937         +      Not Applicable
  12/25/2025 08 AM PST           16.90           7028         +      Not Applicable
  12/25/2025 09 AM PST           16.95           7120         +      Not Applicable
  12/25/2025 10 AM PST           17.00           7213         +      Not Applicable
  12/25/2025 11 AM PST           17.05           7306         +      Not Applicable
  12/25/2025 12 PM PST           17.10           7399         +      Not Applicable
  12/25/2025 01 PM PST           17.13           7455         +      Not Applicable
  12/25/2025 02 PM PST           17.16           7511         +      Not Applicable
  12/25/2025 03 PM PST           17.17           7529         +      Not Applicable
  12/25/2025 04 PM PST           17.18           7548         +      Not Applicable
  12/25/2025 05 PM PST           17.18           7548         0      Not Applicable
  12/25/2025 06 PM PST           17.18           7548         0      Not Applicable
  12/25/2025 07 PM PST           17.18           7548         0      Not Applicable
  12/25/2025 08 PM PST           17.18           7548         0      Not Applicable
  12/25/2025 09 PM PST           17.19           7567         +      Not Applicable
  12/25/2025 10 PM PST           17.20           7586         +      Not Applicable
  12/25/2025 11 PM PST           17.20           7586         0      Not Applicable
  12/26/2025 12 AM PST           17.22           7623         +      Not Applicable
  12/26/2025 01 AM PST           17.22           7623         0      Not Applicable
  12/26/2025 02 AM PST           17.22           7623         0      Not Applicable
  12/26/2025 03 AM PST           17.22           7623         0      Not Applicable
  12/26/2025 04 AM PST           17.21           7605         -      Not Applicable
  12/26/2025 05 AM PST           17.20           7586         -      Not Applicable
  12/26/2025 06 AM PST           17.20           7586         0      Not Applicable
  12/26/2025 07 AM PST           17.21           7605         +      Not Applicable
  12/26/2025 08 AM PST           17.24           7661         +      Not Applicable
  12/26/2025 09 AM PST           17.29           7755         +      Not Applicable
  12/26/2025 10 AM PST           17.34           7850         +      Not Applicable
  12/26/2025 11 AM PST           17.41           7983         +      Not Applicable
  12/26/2025 12 PM PST           17.47           8097         +      Not Applicable
  12/26/2025 01 PM PST           17.51           8174         +      Not Applicable
  12/26/2025 02 PM PST           17.53           8212         +      Not Applicable
  12/26/2025 03 PM PST           17.53           8212         0      Not Applicable
  12/26/2025 04 PM PST           17.51           8174         -      Not Applicable
  12/26/2025 05 PM PST           17.48           8117         -      Not Applicable
  12/26/2025 06 PM PST           17.45           8059         -      Not Applicable
  12/26/2025 07 PM PST           17.39           7945         -      Not Applicable
  12/26/2025 08 PM PST           17.33           7831         -      Not Applicable
  12/26/2025 09 PM PST           17.25           7680         -      Not Applicable
  12/26/2025 10 PM PST           17.17           7529         -      Not Applicable
  12/26/2025 11 PM PST           17.09           7380         -      Not Applicable
  12/27/2025 12 AM PST           17.00           7213         -      Not Applicable
  12/27/2025 01 AM PST           16.91           7047         -      Not Applicable
  12/27/2025 02 AM PST           16.82           6882         -      Not Applicable
  12/27/2025 03 AM PST           16.72           6700         -      Not Applicable
  12/27/2025 04 AM PST           16.63           6537         -      Not Applicable
  12/27/2025 05 AM PST           16.54           6375         -      Not Applicable
  12/27/2025 06 AM PST           16.45           6215         -      Not Applicable
  12/27/2025 07 AM PST           16.36           6055         -      Not Applicable
  12/27/2025 08 AM PST           16.27           5897         -      Not Applicable
  12/27/2025 09 AM PST           16.19           5758         -      Not Applicable
  12/27/2025 10 AM PST           16.11           5619         -      Not Applicable
  12/27/2025 11 AM PST           16.04           5498         -      Not Applicable
  12/27/2025 12 PM PST           15.96           5361         -      Not Applicable
  12/27/2025 01 PM PST           15.90           5259         -      Not Applicable
  12/27/2025 02 PM PST           15.83           5141         -      Not Applicable
  12/27/2025 03 PM PST           15.77           5040         -      Not Applicable
  12/27/2025 04 PM PST           15.71           4940         -      Not Applicable
  12/27/2025 05 PM PST           15.65           4840         -      Not Applicable
  12/27/2025 06 PM PST           15.60           4757         -      Not Applicable
  12/27/2025 07 PM PST           15.55           4675         -      Not Applicable
  12/27/2025 08 PM PST           15.50           4593         -      Not Applicable
  12/27/2025 09 PM PST           15.46           4528         -      Not Applicable
  12/27/2025 10 PM PST           15.41           4447         -      Not Applicable
  12/27/2025 11 PM PST           15.37           4382         -      Not Applicable
  12/28/2025 12 AM PST           15.32           4302         -      Not Applicable
  12/28/2025 01 AM PST           15.28           4238         -      Not Applicable
  12/28/2025 02 AM PST           15.24           4174         -      Not Applicable
  12/28/2025 03 AM PST           15.20           4110         -      Not Applicable
  12/28/2025 04 AM PST           15.16           4047         -      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.