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 27 2026 at 1:31 PM PSTNext Issuance: Feb 28 2026 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:  02/27/2026 at 01:33 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  02/24/2026 at 02:00 PM PST
# Maximum Observed Stage:                       24.97 Feet
# Maximum Observed Flow:                        25842 cfs
#
# Earliest Date & Time of Maximum Forecast:     02/27/2026 at 02:00 PM PST
# Maximum Forecast Stage:                       14.42 Feet
# Maximum Forecast Flow:                        2783 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  02/22/2026 01 PM PST           13.69           1839                Not Applicable
  02/22/2026 02 PM PST           13.73           1889         +      Not Applicable
  02/22/2026 03 PM PST           13.74           1902         +      Not Applicable
  02/22/2026 04 PM PST           13.73           1889         -      Not Applicable
  02/22/2026 05 PM PST           13.67           1814         -      Not Applicable
  02/22/2026 06 PM PST           13.66           1802         -      Not Applicable
  02/22/2026 07 PM PST           13.56           1679         -      Not Applicable
  02/22/2026 08 PM PST           13.62           1753         +      Not Applicable
  02/22/2026 09 PM PST           13.62           1753         0      Not Applicable
  02/22/2026 10 PM PST           13.59           1716         -      Not Applicable
  02/22/2026 11 PM PST           13.58           1703         -      Not Applicable
  02/23/2026 12 AM PST           13.60           1728         +      Not Applicable
  02/23/2026 01 AM PST           13.60           1728         0      Not Applicable
  02/23/2026 02 AM PST           13.62           1753         +      Not Applicable
  02/23/2026 03 AM PST           13.65           1790         +      Not Applicable
  02/23/2026 04 AM PST           13.65           1790         0      Not Applicable
  02/23/2026 05 AM PST           13.66           1802         +      Not Applicable
  02/23/2026 06 AM PST           13.68           1827         +      Not Applicable
  02/23/2026 07 AM PST           13.69           1839         +      Not Applicable
  02/23/2026 08 AM PST           13.68           1827         -      Not Applicable
  02/23/2026 09 AM PST           13.69           1839         +      Not Applicable
  02/23/2026 10 AM PST           13.69           1839         0      Not Applicable
  02/23/2026 11 AM PST           13.69           1839         0      Not Applicable
  02/23/2026 12 PM PST           13.70           1852         +      Not Applicable
  02/23/2026 01 PM PST           13.69           1839         -      Not Applicable
  02/23/2026 02 PM PST           13.70           1852         +      Not Applicable
  02/23/2026 03 PM PST           13.69           1839         -      Not Applicable
  02/23/2026 04 PM PST           13.67           1814         -      Not Applicable
  02/23/2026 05 PM PST           13.65           1790         -      Not Applicable
  02/23/2026 06 PM PST           13.65           1790         0      Not Applicable
  02/23/2026 07 PM PST           13.65           1790         0      Not Applicable
  02/23/2026 08 PM PST           13.63           1765         -      Not Applicable
  02/23/2026 09 PM PST           13.69           1839         +      Not Applicable
  02/23/2026 10 PM PST           13.79           1964         +      Not Applicable
  02/23/2026 11 PM PST           13.97           2193         +      Not Applicable
  02/24/2026 12 AM PST           14.18           2465         +      Not Applicable
  02/24/2026 01 AM PST           14.66           3107         +      Not Applicable
  02/24/2026 02 AM PST           15.23           3900         +      Not Applicable
  02/24/2026 03 AM PST           16.18           5450         +      Not Applicable
  02/24/2026 04 AM PST           17.21           7394         +      Not Applicable
  02/24/2026 05 AM PST           18.29           9587         +      Not Applicable
  02/24/2026 06 AM PST           19.61          12457         +      Not Applicable
  02/24/2026 07 AM PST           20.86          15346         +      Not Applicable
  02/24/2026 08 AM PST           22.02          18162         +      Not Applicable
  02/24/2026 09 AM PST           22.98          20583         +      Not Applicable
  02/24/2026 10 AM PST           23.38          21614         +      Not Applicable
  02/24/2026 11 AM PST           23.80          22712         +      Not Applicable
  02/24/2026 12 PM PST           24.31          24063         +      Not Applicable
  02/24/2026 01 PM PST           24.69          25083         +      Not Applicable
  02/24/2026 02 PM PST           24.97          25842         +      Not Applicable
  02/24/2026 03 PM PST           24.66          25002         -      Not Applicable
  02/24/2026 04 PM PST           24.54          24679         -      Not Applicable
  02/24/2026 05 PM PST           24.32          24090         -      Not Applicable
  02/24/2026 06 PM PST           24.30          24036         -      Not Applicable
  02/24/2026 07 PM PST           23.86          22870         -      Not Applicable
  02/24/2026 08 PM PST           23.76          22607         -      Not Applicable
  02/24/2026 09 PM PST           23.50          21926         -      Not Applicable
  02/24/2026 10 PM PST           23.19          21123         -      Not Applicable
  02/24/2026 11 PM PST           22.90          20378         -      Not Applicable
  02/25/2026 12 AM PST           22.50          19362         -      Not Applicable
  02/25/2026 01 AM PST           22.21          18634         -      Not Applicable
  02/25/2026 02 AM PST           21.83          17692         -      Not Applicable
  02/25/2026 03 AM PST           21.60          17128         -      Not Applicable
  02/25/2026 04 AM PST           21.17          16086         -      Not Applicable
  02/25/2026 05 AM PST           20.84          15298         -      Not Applicable
  02/25/2026 06 AM PST           20.45          14381         -      Not Applicable
  02/25/2026 07 AM PST           20.07          13502         -      Not Applicable
  02/25/2026 08 AM PST           19.81          12908         -      Not Applicable
  02/25/2026 09 AM PST           19.62          12479         -      Not Applicable
  02/25/2026 10 AM PST           19.31          11787         -      Not Applicable
  02/25/2026 11 AM PST           19.11          11347         -      Not Applicable
  02/25/2026 12 PM PST           18.77          10608         -      Not Applicable
  02/25/2026 01 PM PST           18.61          10264         -      Not Applicable
  02/25/2026 02 PM PST           18.45           9924         -      Not Applicable
  02/25/2026 03 PM PST           18.18           9357         -      Not Applicable
  02/25/2026 04 PM PST           17.97           8922         -      Not Applicable
  02/25/2026 05 PM PST           17.64           8249         -      Not Applicable
  02/25/2026 06 PM PST           17.67           8310         +      Not Applicable
  02/25/2026 07 PM PST           17.49           7948         -      Not Applicable
  02/25/2026 08 PM PST           17.41           7789         -      Not Applicable
  02/25/2026 09 PM PST           17.25           7472         -      Not Applicable
  02/25/2026 10 PM PST           17.16           7296         -      Not Applicable
  02/25/2026 11 PM PST           16.90           6793         -      Not Applicable
  02/26/2026 12 AM PST           16.74           6488         -      Not Applicable
  02/26/2026 01 AM PST           16.55           6131         -      Not Applicable
  02/26/2026 02 AM PST           16.44           5926         -      Not Applicable
  02/26/2026 03 AM PST           16.22           5523         -      Not Applicable
  02/26/2026 04 AM PST           16.01           5145         -      Not Applicable
  02/26/2026 05 AM PST           16.07           5252         +      Not Applicable
  02/26/2026 06 AM PST           16.02           5163         -      Not Applicable
  02/26/2026 07 AM PST           15.82           4821         -      Not Applicable
  02/26/2026 08 AM PST           15.71           4645         -      Not Applicable
  02/26/2026 09 AM PST           15.65           4549         -      Not Applicable
  02/26/2026 10 AM PST           15.56           4407         -      Not Applicable
  02/26/2026 11 AM PST           15.47           4265         -      Not Applicable
  02/26/2026 12 PM PST           15.37           4109         -      Not Applicable
  02/26/2026 01 PM PST           15.36           4093         -      Not Applicable
  02/26/2026 02 PM PST           15.28           3972         -      Not Applicable
  02/26/2026 03 PM PST           15.21           3872         -      Not Applicable
  02/26/2026 04 PM PST           15.15           3787         -      Not Applicable
  02/26/2026 05 PM PST           15.15           3787         0      Not Applicable
  02/26/2026 06 PM PST           15.10           3717         -      Not Applicable
  02/26/2026 07 PM PST           15.06           3661         -      Not Applicable
  02/26/2026 08 PM PST           15.01           3591         -      Not Applicable
  02/26/2026 09 PM PST           14.95           3507         -      Not Applicable
  02/26/2026 10 PM PST           14.95           3507         0      Not Applicable
  02/26/2026 11 PM PST           14.91           3451         -      Not Applicable
  02/27/2026 12 AM PST           14.84           3354         -      Not Applicable
  02/27/2026 01 AM PST           14.83           3341         -      Not Applicable
  02/27/2026 02 AM PST           14.82           3327         -      Not Applicable
  02/27/2026 03 AM PST           14.75           3230         -      Not Applicable
  02/27/2026 04 AM PST           14.73           3203         -      Not Applicable
  02/27/2026 05 AM PST           14.65           3094         -      Not Applicable
  02/27/2026 06 AM PST           14.62           3053         -      Not Applicable
  02/27/2026 07 AM PST           14.64           3080         +      Not Applicable
  02/27/2026 08 AM PST           14.60           3026         -      Not Applicable
  02/27/2026 09 AM PST           14.57           2985         -      Not Applicable
  02/27/2026 10 AM PST           14.54           2944         -      Not Applicable
  02/27/2026 11 AM PST           14.52           2917         -      Not Applicable
  02/27/2026 12 PM PST           14.49           2877         -      Not Applicable
  02/27/2026 01 PM PST           14.45           2823         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  02/27/2026 02 PM PST           14.42           2783                Not Applicable
  02/27/2026 03 PM PST           14.39           2743         -      Not Applicable
  02/27/2026 04 PM PST           14.36           2703         -      Not Applicable
  02/27/2026 05 PM PST           14.34           2677         -      Not Applicable
  02/27/2026 06 PM PST           14.32           2650         -      Not Applicable
  02/27/2026 07 PM PST           14.30           2623         -      Not Applicable
  02/27/2026 08 PM PST           14.28           2597         -      Not Applicable
  02/27/2026 09 PM PST           14.26           2571         -      Not Applicable
  02/27/2026 10 PM PST           14.24           2544         -      Not Applicable
  02/27/2026 11 PM PST           14.22           2518         -      Not Applicable
  02/28/2026 12 AM PST           14.21           2505         -      Not Applicable
  02/28/2026 01 AM PST           14.19           2479         -      Not Applicable
  02/28/2026 02 AM PST           14.18           2465         -      Not Applicable
  02/28/2026 03 AM PST           14.16           2439         -      Not Applicable
  02/28/2026 04 AM PST           14.15           2426         -      Not Applicable
  02/28/2026 05 AM PST           14.13           2400         -      Not Applicable
  02/28/2026 06 AM PST           14.12           2387         -      Not Applicable
  02/28/2026 07 AM PST           14.11           2374         -      Not Applicable
  02/28/2026 08 AM PST           14.10           2361         -      Not Applicable
  02/28/2026 09 AM PST           14.09           2348         -      Not Applicable
  02/28/2026 10 AM PST           14.08           2335         -      Not Applicable
  02/28/2026 11 AM PST           14.07           2322         -      Not Applicable
  02/28/2026 12 PM PST           14.06           2309         -      Not Applicable
  02/28/2026 01 PM PST           14.05           2296         -      Not Applicable
  02/28/2026 02 PM PST           14.04           2283         -      Not Applicable
  02/28/2026 03 PM PST           14.03           2270         -      Not Applicable
  02/28/2026 04 PM PST           14.02           2258         -      Not Applicable
  02/28/2026 05 PM PST           14.01           2245         -      Not Applicable
  02/28/2026 06 PM PST           13.99           2219         -      Not Applicable
  02/28/2026 07 PM PST           13.98           2206         -      Not Applicable
  02/28/2026 08 PM PST           13.97           2193         -      Not Applicable
  02/28/2026 09 PM PST           13.96           2180         -      Not Applicable
  02/28/2026 10 PM PST           13.95           2168         -      Not Applicable
  02/28/2026 11 PM PST           13.93           2142         -      Not Applicable
  03/01/2026 12 AM PST           13.92           2129         -      Not Applicable
  03/01/2026 01 AM PST           13.91           2116         -      Not Applicable
  03/01/2026 02 AM PST           13.89           2091         -      Not Applicable
  03/01/2026 03 AM PST           13.88           2078         -      Not Applicable
  03/01/2026 04 AM PST           13.87           2066         -      Not Applicable
  03/01/2026 05 AM PST           13.86           2053         -      Not Applicable
  03/01/2026 06 AM PST           13.85           2040         -      Not Applicable
  03/01/2026 07 AM PST           13.83           2015         -      Not Applicable
  03/01/2026 08 AM PST           13.82           2002         -      Not Applicable
  03/01/2026 09 AM PST           13.81           1990         -      Not Applicable
  03/01/2026 10 AM PST           13.80           1977         -      Not Applicable
  03/01/2026 11 AM PST           13.79           1964         -      Not Applicable
  03/01/2026 12 PM PST           13.78           1952         -      Not Applicable
  03/01/2026 01 PM PST           13.77           1939         -      Not Applicable
  03/01/2026 02 PM PST           13.76           1927         -      Not Applicable
  03/01/2026 03 PM PST           13.74           1902         -      Not Applicable
  03/01/2026 04 PM PST           13.73           1889         -      Not Applicable
  03/01/2026 05 PM PST           13.73           1889         0      Not Applicable
  03/01/2026 06 PM PST           13.72           1877         -      Not Applicable
  03/01/2026 07 PM PST           13.71           1864         -      Not Applicable
  03/01/2026 08 PM PST           13.70           1852         -      Not Applicable
  03/01/2026 09 PM PST           13.69           1839         -      Not Applicable
  03/01/2026 10 PM PST           13.68           1827         -      Not Applicable
  03/01/2026 11 PM PST           13.67           1814         -      Not Applicable
  03/02/2026 12 AM PST           13.66           1802         -      Not Applicable
  03/02/2026 01 AM PST           13.65           1790         -      Not Applicable
  03/02/2026 02 AM PST           13.65           1790         0      Not Applicable
  03/02/2026 03 AM PST           13.64           1777         -      Not Applicable
  03/02/2026 04 AM PST           13.63           1765         -      Not Applicable
  03/02/2026 05 AM PST           13.62           1753         -      Not Applicable
  03/02/2026 06 AM PST           13.61           1740         -      Not Applicable
  03/02/2026 07 AM PST           13.61           1740         0      Not Applicable
  03/02/2026 08 AM PST           13.60           1728         -      Not Applicable
  03/02/2026 09 AM PST           13.59           1716         -      Not Applicable
  03/02/2026 10 AM PST           13.58           1703         -      Not Applicable
  03/02/2026 11 AM PST           13.57           1691         -      Not Applicable
  03/02/2026 12 PM PST           13.57           1691         0      Not Applicable
  03/02/2026 01 PM PST           13.56           1679         -      Not Applicable
  03/02/2026 02 PM PST           13.55           1667         -      Not Applicable
  03/02/2026 03 PM PST           13.54           1654         -      Not Applicable
  03/02/2026 04 PM PST           13.54           1654         0      Not Applicable
  03/02/2026 05 PM PST           13.53           1642         -      Not Applicable
  03/02/2026 06 PM PST           13.52           1630         -      Not Applicable
  03/02/2026 07 PM PST           13.51           1618         -      Not Applicable
  03/02/2026 08 PM PST           13.51           1618         0      Not Applicable
  03/02/2026 09 PM PST           13.50           1606         -      Not Applicable
  03/02/2026 10 PM PST           13.49           1593         -      Not Applicable
  03/02/2026 11 PM PST           13.49           1593         0      Not Applicable
  03/03/2026 12 AM PST           13.48           1581         -      Not Applicable
  03/03/2026 01 AM PST           13.47           1569         -      Not Applicable
  03/03/2026 02 AM PST           13.47           1569         0      Not Applicable
  03/03/2026 03 AM PST           13.46           1557         -      Not Applicable
  03/03/2026 04 AM PST           13.45           1545         -      Not Applicable
  03/03/2026 05 AM PST           13.45           1545         0      Not Applicable
  03/03/2026 06 AM PST           13.44           1533         -      Not Applicable
  03/03/2026 07 AM PST           13.44           1533         0      Not Applicable
  03/03/2026 08 AM PST           13.43           1521         -      Not Applicable
  03/03/2026 09 AM PST           13.43           1521         0      Not Applicable
  03/03/2026 10 AM PST           13.42           1509         -      Not Applicable
  03/03/2026 11 AM PST           13.41           1497         -      Not Applicable
  03/03/2026 12 PM PST           13.41           1497         0      Not Applicable
  03/03/2026 01 PM PST           13.40           1485         -      Not Applicable
  03/03/2026 02 PM PST           13.40           1485         0      Not Applicable
  03/03/2026 03 PM PST           13.39           1473         -      Not Applicable
  03/03/2026 04 PM PST           13.39           1473         0      Not Applicable
  03/03/2026 05 PM PST           13.38           1461         -      Not Applicable
  03/03/2026 06 PM PST           13.38           1461         0      Not Applicable
  03/03/2026 07 PM PST           13.37           1449         -      Not Applicable
  03/03/2026 08 PM PST           13.37           1449         0      Not Applicable
  03/03/2026 09 PM PST           13.36           1437         -      Not Applicable
  03/03/2026 10 PM PST           13.36           1437         0      Not Applicable
  03/03/2026 11 PM PST           13.35           1425         -      Not Applicable
  03/04/2026 12 AM PST           13.35           1425         0      Not Applicable
  03/04/2026 01 AM PST           13.33           1401         -      Not Applicable
  03/04/2026 02 AM PST           13.34           1413         +      Not Applicable
  03/04/2026 03 AM PST           13.34           1413         0      Not Applicable
  03/04/2026 04 AM PST           13.33           1401         -      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.