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: Feb 20 2026 at 8:05 AM PSTNext Issuance: Feb 20 2026 at 3:00 PM 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:  02/20/2026 at 08:07 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  02/16/2026 at 06:00 AM PST
# Maximum Observed Stage:                       13.78 Feet
# Maximum Observed Flow:                        1952 cfs
#
# Earliest Date & Time of Maximum Forecast:     02/24/2026 at 12:00 PM PST
# Maximum Forecast Stage:                       17.15 Feet
# Maximum Forecast Flow:                        7277 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  02/15/2026 08 AM PST           12.18            322                Not Applicable
  02/15/2026 09 AM PST           12.20            334         +      Not Applicable
  02/15/2026 10 AM PST           12.21            341         +      Not Applicable
  02/15/2026 11 AM PST           12.22            347         +      Not Applicable
  02/15/2026 12 PM PST           12.24            360         +      Not Applicable
  02/15/2026 01 PM PST           12.25            367         +      Not Applicable
  02/15/2026 02 PM PST           12.28            388         +      Not Applicable
  02/15/2026 03 PM PST           12.32            417         +      Not Applicable
  02/15/2026 04 PM PST           12.36            448         +      Not Applicable
  02/15/2026 05 PM PST           12.43            503         +      Not Applicable
  02/15/2026 06 PM PST           12.54            589         +      Not Applicable
  02/15/2026 07 PM PST           12.68            701         +      Not Applicable
  02/15/2026 08 PM PST           12.82            821         +      Not Applicable
  02/15/2026 09 PM PST           12.98            998         +      Not Applicable
  02/15/2026 10 PM PST           13.25           1307         +      Not Applicable
  02/15/2026 11 PM PST           13.42           1509         +      Not Applicable
  02/16/2026 12 AM PST           13.57           1691         +      Not Applicable
  02/16/2026 01 AM PST           13.73           1889         +      Not Applicable
  02/16/2026 02 AM PST           13.78           1952         +      Not Applicable
  02/16/2026 03 AM PST           13.75           1914         -      Not Applicable
  02/16/2026 04 AM PST           13.76           1927         +      Not Applicable
  02/16/2026 05 AM PST           13.75           1914         -      Not Applicable
  02/16/2026 06 AM PST           13.78           1952         +      Not Applicable
  02/16/2026 07 AM PST           13.76           1927         -      Not Applicable
  02/16/2026 08 AM PST           13.69           1839         -      Not Applicable
  02/16/2026 09 AM PST           13.69           1839         0      Not Applicable
  02/16/2026 10 AM PST           13.65           1790         -      Not Applicable
  02/16/2026 11 AM PST           13.63           1765         -      Not Applicable
  02/16/2026 12 PM PST           13.60           1728         -      Not Applicable
  02/16/2026 01 PM PST           13.58           1703         -      Not Applicable
  02/16/2026 02 PM PST           13.54           1654         -      Not Applicable
  02/16/2026 03 PM PST           13.51           1618         -      Not Applicable
  02/16/2026 04 PM PST           13.47           1569         -      Not Applicable
  02/16/2026 05 PM PST           13.43           1521         -      Not Applicable
  02/16/2026 06 PM PST           13.42           1509         -      Not Applicable
  02/16/2026 07 PM PST           13.39           1473         -      Not Applicable
  02/16/2026 08 PM PST           13.36           1437         -      Not Applicable
  02/16/2026 09 PM PST           13.35           1425         -      Not Applicable
  02/16/2026 10 PM PST           13.32           1390         -      Not Applicable
  02/16/2026 11 PM PST           13.29           1354         -      Not Applicable
  02/17/2026 12 AM PST           13.26           1319         -      Not Applicable
  02/17/2026 01 AM PST           13.26           1319         0      Not Applicable
  02/17/2026 02 AM PST           13.26           1319         0      Not Applicable
  02/17/2026 03 AM PST           13.25           1307         -      Not Applicable
  02/17/2026 04 AM PST           13.24           1295         -      Not Applicable
  02/17/2026 05 AM PST           13.21           1260         -      Not Applicable
  02/17/2026 06 AM PST           13.23           1284         +      Not Applicable
  02/17/2026 07 AM PST           13.22           1272         -      Not Applicable
  02/17/2026 08 AM PST           13.23           1284         +      Not Applicable
  02/17/2026 09 AM PST           13.23           1284         0      Not Applicable
  02/17/2026 10 AM PST           13.20           1249         -      Not Applicable
  02/17/2026 11 AM PST           13.23           1284         +      Not Applicable
  02/17/2026 12 PM PST           13.25           1307         +      Not Applicable
  02/17/2026 01 PM PST           13.25           1307         0      Not Applicable
  02/17/2026 02 PM PST           13.26           1319         +      Not Applicable
  02/17/2026 03 PM PST           13.27           1330         +      Not Applicable
  02/17/2026 04 PM PST           13.35           1425         +      Not Applicable
  02/17/2026 05 PM PST           13.36           1437         +      Not Applicable
  02/17/2026 06 PM PST           13.37           1449         +      Not Applicable
  02/17/2026 07 PM PST           13.36           1437         -      Not Applicable
  02/17/2026 08 PM PST           13.36           1437         0      Not Applicable
  02/17/2026 09 PM PST           13.37           1449         +      Not Applicable
  02/17/2026 10 PM PST           13.37           1449         0      Not Applicable
  02/17/2026 11 PM PST           13.36           1437         -      Not Applicable
  02/18/2026 12 AM PST           13.35           1425         -      Not Applicable
  02/18/2026 01 AM PST           13.33           1401         -      Not Applicable
  02/18/2026 02 AM PST           13.33           1401         0      Not Applicable
  02/18/2026 03 AM PST           13.30           1366         -      Not Applicable
  02/18/2026 04 AM PST           13.32           1390         +      Not Applicable
  02/18/2026 05 AM PST           13.31           1378         -      Not Applicable
  02/18/2026 06 AM PST           13.30           1366         -      Not Applicable
  02/18/2026 07 AM PST           13.29           1354         -      Not Applicable
  02/18/2026 08 AM PST           13.28           1342         -      Not Applicable
  02/18/2026 09 AM PST           13.28           1342         0      Not Applicable
  02/18/2026 10 AM PST           13.28           1342         0      Not Applicable
  02/18/2026 11 AM PST           13.27           1330         -      Not Applicable
  02/18/2026 12 PM PST           13.27           1330         0      Not Applicable
  02/18/2026 01 PM PST           13.24           1295         -      Not Applicable
  02/18/2026 02 PM PST           13.25           1307         +      Not Applicable
  02/18/2026 03 PM PST           13.25           1307         0      Not Applicable
  02/18/2026 04 PM PST           13.24           1295         -      Not Applicable
  02/18/2026 05 PM PST           13.24           1295         0      Not Applicable
  02/18/2026 06 PM PST           13.25           1307         +      Not Applicable
  02/18/2026 07 PM PST           13.25           1307         0      Not Applicable
  02/18/2026 08 PM PST           13.25           1307         0      Not Applicable
  02/18/2026 09 PM PST           13.28           1342         +      Not Applicable
  02/18/2026 10 PM PST           13.28           1342         0      Not Applicable
  02/18/2026 11 PM PST           13.29           1354         +      Not Applicable
  02/19/2026 12 AM PST           13.29           1354         0      Not Applicable
  02/19/2026 01 AM PST           13.30           1366         +      Not Applicable
  02/19/2026 02 AM PST           13.31           1378         +      Not Applicable
  02/19/2026 03 AM PST           13.32           1390         +      Not Applicable
  02/19/2026 04 AM PST           13.35           1425         +      Not Applicable
  02/19/2026 05 AM PST           13.37           1449         +      Not Applicable
  02/19/2026 06 AM PST           13.38           1461         +      Not Applicable
  02/19/2026 07 AM PST           13.41           1497         +      Not Applicable
  02/19/2026 08 AM PST           13.43           1521         +      Not Applicable
  02/19/2026 09 AM PST           13.46           1557         +      Not Applicable
  02/19/2026 10 AM PST           13.47           1569         +      Not Applicable
  02/19/2026 11 AM PST           13.51           1618         +      Not Applicable
  02/19/2026 12 PM PST           13.51           1618         0      Not Applicable
  02/19/2026 01 PM PST           13.52           1630         +      Not Applicable
  02/19/2026 02 PM PST           13.52           1630         0      Not Applicable
  02/19/2026 03 PM PST           13.53           1642         +      Not Applicable
  02/19/2026 04 PM PST           13.53           1642         0      Not Applicable
  02/19/2026 05 PM PST           13.53           1642         0      Not Applicable
  02/19/2026 06 PM PST           13.54           1654         +      Not Applicable
  02/19/2026 07 PM PST           13.56           1679         +      Not Applicable
  02/19/2026 08 PM PST           13.54           1654         -      Not Applicable
  02/19/2026 09 PM PST           13.55           1667         +      Not Applicable
  02/19/2026 10 PM PST           13.56           1679         +      Not Applicable
  02/19/2026 11 PM PST           13.55           1667         -      Not Applicable
  02/20/2026 12 AM PST           13.53           1642         -      Not Applicable
  02/20/2026 01 AM PST           13.54           1654         +      Not Applicable
  02/20/2026 02 AM PST           13.55           1667         +      Not Applicable
  02/20/2026 03 AM PST           13.53           1642         -      Not Applicable
  02/20/2026 04 AM PST           13.54           1654         +      Not Applicable
  02/20/2026 05 AM PST           13.51           1618         -      Not Applicable
  02/20/2026 06 AM PST           13.49           1593         -      Not Applicable
  02/20/2026 07 AM PST           13.47           1569         -      Not Applicable
  02/20/2026 08 AM PST           13.45           1545         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  02/20/2026 09 AM PST           13.44           1533                Not Applicable
  02/20/2026 10 AM PST           13.42           1509         -      Not Applicable
  02/20/2026 11 AM PST           13.40           1485         -      Not Applicable
  02/20/2026 12 PM PST           13.38           1461         -      Not Applicable
  02/20/2026 01 PM PST           13.35           1425         -      Not Applicable
  02/20/2026 02 PM PST           13.33           1401         -      Not Applicable
  02/20/2026 03 PM PST           13.31           1378         -      Not Applicable
  02/20/2026 04 PM PST           13.29           1354         -      Not Applicable
  02/20/2026 05 PM PST           13.27           1330         -      Not Applicable
  02/20/2026 06 PM PST           13.25           1307         -      Not Applicable
  02/20/2026 07 PM PST           13.23           1284         -      Not Applicable
  02/20/2026 08 PM PST           13.21           1260         -      Not Applicable
  02/20/2026 09 PM PST           13.19           1237         -      Not Applicable
  02/20/2026 10 PM PST           13.18           1225         -      Not Applicable
  02/20/2026 11 PM PST           13.16           1202         -      Not Applicable
  02/21/2026 12 AM PST           13.15           1191         -      Not Applicable
  02/21/2026 01 AM PST           13.14           1179         -      Not Applicable
  02/21/2026 02 AM PST           13.13           1168         -      Not Applicable
  02/21/2026 03 AM PST           13.11           1145         -      Not Applicable
  02/21/2026 04 AM PST           13.10           1133         -      Not Applicable
  02/21/2026 05 AM PST           13.09           1122         -      Not Applicable
  02/21/2026 06 AM PST           13.09           1122         0      Not Applicable
  02/21/2026 07 AM PST           13.09           1122         0      Not Applicable
  02/21/2026 08 AM PST           13.09           1122         0      Not Applicable
  02/21/2026 09 AM PST           13.11           1145         +      Not Applicable
  02/21/2026 10 AM PST           13.13           1168         +      Not Applicable
  02/21/2026 11 AM PST           13.16           1202         +      Not Applicable
  02/21/2026 12 PM PST           13.20           1249         +      Not Applicable
  02/21/2026 01 PM PST           13.25           1307         +      Not Applicable
  02/21/2026 02 PM PST           13.37           1449         +      Not Applicable
  02/21/2026 03 PM PST           13.44           1533         +      Not Applicable
  02/21/2026 04 PM PST           13.53           1642         +      Not Applicable
  02/21/2026 05 PM PST           13.56           1679         +      Not Applicable
  02/21/2026 06 PM PST           13.58           1703         +      Not Applicable
  02/21/2026 07 PM PST           13.59           1716         +      Not Applicable
  02/21/2026 08 PM PST           13.59           1716         0      Not Applicable
  02/21/2026 09 PM PST           13.59           1716         0      Not Applicable
  02/21/2026 10 PM PST           13.59           1716         0      Not Applicable
  02/21/2026 11 PM PST           13.60           1728         +      Not Applicable
  02/22/2026 12 AM PST           13.62           1753         +      Not Applicable
  02/22/2026 01 AM PST           13.64           1777         +      Not Applicable
  02/22/2026 02 AM PST           13.67           1814         +      Not Applicable
  02/22/2026 03 AM PST           13.71           1864         +      Not Applicable
  02/22/2026 04 AM PST           13.76           1927         +      Not Applicable
  02/22/2026 05 AM PST           13.84           2028         +      Not Applicable
  02/22/2026 06 AM PST           13.97           2193         +      Not Applicable
  02/22/2026 07 AM PST           14.12           2387         +      Not Applicable
  02/22/2026 08 AM PST           14.28           2597         +      Not Applicable
  02/22/2026 09 AM PST           14.42           2783         +      Not Applicable
  02/22/2026 10 AM PST           14.58           2999         +      Not Applicable
  02/22/2026 11 AM PST           14.75           3230         +      Not Applicable
  02/22/2026 12 PM PST           14.95           3507         +      Not Applicable
  02/22/2026 01 PM PST           15.15           3787         +      Not Applicable
  02/22/2026 02 PM PST           15.36           4093         +      Not Applicable
  02/22/2026 03 PM PST           15.57           4423         +      Not Applicable
  02/22/2026 04 PM PST           15.74           4693         +      Not Applicable
  02/22/2026 05 PM PST           15.84           4853         +      Not Applicable
  02/22/2026 06 PM PST           15.88           4918         +      Not Applicable
  02/22/2026 07 PM PST           15.88           4918         0      Not Applicable
  02/22/2026 08 PM PST           15.87           4902         -      Not Applicable
  02/22/2026 09 PM PST           15.85           4869         -      Not Applicable
  02/22/2026 10 PM PST           15.82           4821         -      Not Applicable
  02/22/2026 11 PM PST           15.77           4741         -      Not Applicable
  02/23/2026 12 AM PST           15.72           4661         -      Not Applicable
  02/23/2026 01 AM PST           15.65           4549         -      Not Applicable
  02/23/2026 02 AM PST           15.59           4454         -      Not Applicable
  02/23/2026 03 AM PST           15.54           4375         -      Not Applicable
  02/23/2026 04 AM PST           15.49           4297         -      Not Applicable
  02/23/2026 05 AM PST           15.44           4218         -      Not Applicable
  02/23/2026 06 AM PST           15.39           4140         -      Not Applicable
  02/23/2026 07 AM PST           15.35           4078         -      Not Applicable
  02/23/2026 08 AM PST           15.31           4016         -      Not Applicable
  02/23/2026 09 AM PST           15.28           3972         -      Not Applicable
  02/23/2026 10 AM PST           15.25           3929         -      Not Applicable
  02/23/2026 11 AM PST           15.23           3900         -      Not Applicable
  02/23/2026 12 PM PST           15.22           3886         -      Not Applicable
  02/23/2026 01 PM PST           15.22           3886         0      Not Applicable
  02/23/2026 02 PM PST           15.23           3900         +      Not Applicable
  02/23/2026 03 PM PST           15.24           3915         +      Not Applicable
  02/23/2026 04 PM PST           15.26           3943         +      Not Applicable
  02/23/2026 05 PM PST           15.30           4000         +      Not Applicable
  02/23/2026 06 PM PST           15.36           4093         +      Not Applicable
  02/23/2026 07 PM PST           15.42           4187         +      Not Applicable
  02/23/2026 08 PM PST           15.49           4297         +      Not Applicable
  02/23/2026 09 PM PST           15.58           4438         +      Not Applicable
  02/23/2026 10 PM PST           15.68           4597         +      Not Applicable
  02/23/2026 11 PM PST           15.80           4789         +      Not Applicable
  02/24/2026 12 AM PST           15.94           5021         +      Not Applicable
  02/24/2026 01 AM PST           16.08           5270         +      Not Applicable
  02/24/2026 02 AM PST           16.22           5523         +      Not Applicable
  02/24/2026 03 AM PST           16.35           5760         +      Not Applicable
  02/24/2026 04 AM PST           16.48           6000         +      Not Applicable
  02/24/2026 05 AM PST           16.61           6243         +      Not Applicable
  02/24/2026 06 AM PST           16.73           6469         +      Not Applicable
  02/24/2026 07 AM PST           16.84           6678         +      Not Applicable
  02/24/2026 08 AM PST           16.94           6870         +      Not Applicable
  02/24/2026 09 AM PST           17.03           7043         +      Not Applicable
  02/24/2026 10 AM PST           17.10           7179         +      Not Applicable
  02/24/2026 11 AM PST           17.14           7257         +      Not Applicable
  02/24/2026 12 PM PST           17.15           7277         +      Not Applicable
  02/24/2026 01 PM PST           17.15           7277         0      Not Applicable
  02/24/2026 02 PM PST           17.14           7257         -      Not Applicable
  02/24/2026 03 PM PST           17.13           7237         -      Not Applicable
  02/24/2026 04 PM PST           17.09           7160         -      Not Applicable
  02/24/2026 05 PM PST           17.03           7043         -      Not Applicable
  02/24/2026 06 PM PST           16.94           6870         -      Not Applicable
  02/24/2026 07 PM PST           16.83           6659         -      Not Applicable
  02/24/2026 08 PM PST           16.72           6450         -      Not Applicable
  02/24/2026 09 PM PST           16.61           6243         -      Not Applicable
  02/24/2026 10 PM PST           16.51           6056         -      Not Applicable
  02/24/2026 11 PM PST           16.40           5852         -      Not Applicable
  02/25/2026 12 AM PST           16.30           5669         -      Not Applicable
  02/25/2026 01 AM PST           16.19           5469         -      Not Applicable
  02/25/2026 02 AM PST           16.09           5288         -      Not Applicable
  02/25/2026 03 AM PST           15.99           5109         -      Not Applicable
  02/25/2026 04 AM PST           15.90           4950         -      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.