MATTOLE RIVER - ETTERSBURG (ETTC1)
Latitude: 40.14º NLongitude: 123.99º WElevation: 579 FeetForecast Type: Unofficial Location
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Mar 02 2026 at 12:51 PM PSTNext Issuance: Mar 03 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 - Ettersburg (ETTC1)
#
# File Generation Time:  03/02/2026 at 12:53 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  02/25/2026 at 12:00 PM PST
# Maximum Observed Stage:                       16.05 Feet
# Maximum Observed Flow:                        3343 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/04/2026 at 08:00 PM PST
# Maximum Forecast Stage:                       11.23 Feet
# Maximum Forecast Flow:                        481 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  02/25/2026 12 PM PST           16.05           3343                Not Applicable
  02/25/2026 01 PM PST           15.84           3173         -      Not Applicable
  02/25/2026 02 PM PST           15.76           3109         -      Not Applicable
  02/25/2026 03 PM PST           15.56           2953         -      Not Applicable
  02/25/2026 04 PM PST           15.40           2830         -      Not Applicable
  02/25/2026 05 PM PST           15.36           2800         -      Not Applicable
  02/25/2026 06 PM PST           15.21           2687         -      Not Applicable
  02/25/2026 07 PM PST           15.11           2613         -      Not Applicable
  02/25/2026 08 PM PST           14.87           2439         -      Not Applicable
  02/25/2026 09 PM PST           14.75           2355         -      Not Applicable
  02/25/2026 10 PM PST           14.66           2292         -      Not Applicable
  02/25/2026 11 PM PST           14.57           2230         -      Not Applicable
  02/26/2026 12 AM PST           14.42           2128         -      Not Applicable
  02/26/2026 01 AM PST           14.39           2108         -      Not Applicable
  02/26/2026 02 AM PST           14.30           2048         -      Not Applicable
  02/26/2026 03 AM PST           14.19           1976         -      Not Applicable
  02/26/2026 04 AM PST           14.08           1905         -      Not Applicable
  02/26/2026 05 AM PST           14.14           1943         +      Not Applicable
  02/26/2026 06 AM PST           13.95           1823         -      Not Applicable
  02/26/2026 07 AM PST           13.78           1717         -      Not Applicable
  02/26/2026 08 AM PST           13.82           1742         +      Not Applicable
  02/26/2026 09 AM PST           13.77           1711         -      Not Applicable
  02/26/2026 10 AM PST           13.70           1669         -      Not Applicable
  02/26/2026 11 AM PST           13.58           1597         -      Not Applicable
  02/26/2026 12 PM PST           13.48           1538         -      Not Applicable
  02/26/2026 01 PM PST           13.51           1556         +      Not Applicable
  02/26/2026 02 PM PST           13.42           1503         -      Not Applicable
  02/26/2026 03 PM PST           13.30           1435         -      Not Applicable
  02/26/2026 04 PM PST           13.25           1406         -      Not Applicable
  02/26/2026 05 PM PST           13.15           1351         -      Not Applicable
  02/26/2026 06 PM PST           13.09           1318         -      Not Applicable
  02/26/2026 07 PM PST           13.02           1280         -      Not Applicable
  02/26/2026 08 PM PST           12.98           1259         -      Not Applicable
  02/26/2026 09 PM PST           12.92           1227         -      Not Applicable
  02/26/2026 10 PM PST           12.87           1201         -      Not Applicable
  02/26/2026 11 PM PST           12.84           1185         -      Not Applicable
  02/27/2026 12 AM PST           12.86           1195         +      Not Applicable
  02/27/2026 01 AM PST           12.81           1169         -      Not Applicable
  02/27/2026 02 AM PST           12.73           1128         -      Not Applicable
  02/27/2026 03 AM PST           12.68           1103         -      Not Applicable
  02/27/2026 04 AM PST           12.65           1088         -      Not Applicable
  02/27/2026 05 AM PST           12.62           1073         -      Not Applicable
  02/27/2026 06 AM PST           12.57           1048         -      Not Applicable
  02/27/2026 07 AM PST           12.54           1033         -      Not Applicable
  02/27/2026 08 AM PST           12.49           1009         -      Not Applicable
  02/27/2026 09 AM PST           12.46            994         -      Not Applicable
  02/27/2026 10 AM PST           12.43            980         -      Not Applicable
  02/27/2026 11 AM PST           12.41            970         -      Not Applicable
  02/27/2026 12 PM PST           12.38            956         -      Not Applicable
  02/27/2026 01 PM PST           12.35            942         -      Not Applicable
  02/27/2026 02 PM PST           12.29            914         -      Not Applicable
  02/27/2026 03 PM PST           12.27            905         -      Not Applicable
  02/27/2026 04 PM PST           12.25            895         -      Not Applicable
  02/27/2026 05 PM PST           12.23            886         -      Not Applicable
  02/27/2026 06 PM PST           12.18            864         -      Not Applicable
  02/27/2026 07 PM PST           12.15            850         -      Not Applicable
  02/27/2026 08 PM PST           12.13            841         -      Not Applicable
  02/27/2026 09 PM PST           12.09            823         -      Not Applicable
  02/27/2026 10 PM PST           12.06            810         -      Not Applicable
  02/27/2026 11 PM PST           12.04            801         -      Not Applicable
  02/28/2026 12 AM PST           12.02            792         -      Not Applicable
  02/28/2026 01 AM PST           11.97            771         -      Not Applicable
  02/28/2026 02 AM PST           11.97            771         0      Not Applicable
  02/28/2026 03 AM PST           11.94            758         -      Not Applicable
  02/28/2026 04 AM PST           11.94            758         0      Not Applicable
  02/28/2026 05 AM PST           11.91            745         -      Not Applicable
  02/28/2026 06 AM PST           11.89            736         -      Not Applicable
  02/28/2026 07 AM PST           11.87            728         -      Not Applicable
  02/28/2026 08 AM PST           11.85            720         -      Not Applicable
  02/28/2026 09 AM PST           11.83            711         -      Not Applicable
  02/28/2026 10 AM PST           11.82            707         -      Not Applicable
  02/28/2026 11 AM PST           11.80            699         -      Not Applicable
  02/28/2026 12 PM PST           11.78            691         -      Not Applicable
  02/28/2026 01 PM PST           11.75            678         -      Not Applicable
  02/28/2026 02 PM PST           11.72            666         -      Not Applicable
  02/28/2026 03 PM PST           11.72            666         0      Not Applicable
  02/28/2026 04 PM PST           11.70            658         -      Not Applicable
  02/28/2026 05 PM PST           11.67            646         -      Not Applicable
  02/28/2026 06 PM PST           11.66            642         -      Not Applicable
  02/28/2026 07 PM PST           11.66            642         0      Not Applicable
  02/28/2026 08 PM PST           11.61            622         -      Not Applicable
  02/28/2026 09 PM PST           11.61            622         0      Not Applicable
  02/28/2026 10 PM PST           11.58            611         -      Not Applicable
  02/28/2026 11 PM PST           11.57            607         -      Not Applicable
  03/01/2026 12 AM PST           11.54            595         -      Not Applicable
  03/01/2026 01 AM PST           11.51            584         -      Not Applicable
  03/01/2026 02 AM PST           11.50            580         -      Not Applicable
  03/01/2026 03 AM PST           11.48            572         -      Not Applicable
  03/01/2026 04 AM PST           11.46            565         -      Not Applicable
  03/01/2026 05 AM PST           11.45            561         -      Not Applicable
  03/01/2026 06 AM PST           11.44            557         -      Not Applicable
  03/01/2026 07 AM PST           11.43            553         -      Not Applicable
  03/01/2026 08 AM PST           11.41            546         -      Not Applicable
  03/01/2026 09 AM PST           11.41            546         0      Not Applicable
  03/01/2026 10 AM PST           11.38            535         -      Not Applicable
  03/01/2026 11 AM PST           11.36            527         -      Not Applicable
  03/01/2026 12 PM PST           11.35            524         -      Not Applicable
  03/01/2026 01 PM PST           11.35            524         0      Not Applicable
  03/01/2026 02 PM PST           11.31            509         -      Not Applicable
  03/01/2026 03 PM PST           11.30            506         -      Not Applicable
  03/01/2026 04 PM PST           11.28            499         -      Not Applicable
  03/01/2026 05 PM PST           11.27            495         -      Not Applicable
  03/01/2026 06 PM PST           11.26            491         -      Not Applicable
  03/01/2026 07 PM PST           11.24            484         -      Not Applicable
  03/01/2026 08 PM PST           11.24            484         0      Not Applicable
  03/01/2026 09 PM PST           11.23            481         -      Not Applicable
  03/01/2026 10 PM PST           11.22            477         -      Not Applicable
  03/01/2026 11 PM PST           11.21            474         -      Not Applicable
  03/02/2026 12 AM PST           11.19            467         -      Not Applicable
  03/02/2026 01 AM PST           11.21            474         +      Not Applicable
  03/02/2026 02 AM PST           11.19            467         -      Not Applicable
  03/02/2026 03 AM PST           11.15            453         -      Not Applicable
  03/02/2026 04 AM PST           11.15            453         0      Not Applicable
  03/02/2026 05 AM PST           11.14            450         -      Not Applicable
  03/02/2026 06 AM PST           11.12            443         -      Not Applicable
  03/02/2026 07 AM PST           11.11            440         -      Not Applicable
  03/02/2026 08 AM PST           11.12            443         +      Not Applicable
  03/02/2026 09 AM PST           11.09            434         -      Not Applicable
  03/02/2026 10 AM PST           11.09            434         0      Not Applicable
  03/02/2026 11 AM PST           11.09            434         0      Not Applicable
  03/02/2026 12 PM PST           11.08            431         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/02/2026 01 PM PST           11.08            431                Not Applicable
  03/02/2026 02 PM PST           11.08            431         0      Not Applicable
  03/02/2026 03 PM PST           11.08            431         0      Not Applicable
  03/02/2026 04 PM PST           11.08            431         0      Not Applicable
  03/02/2026 05 PM PST           11.08            431         0      Not Applicable
  03/02/2026 06 PM PST           11.08            431         0      Not Applicable
  03/02/2026 07 PM PST           11.07            429         -      Not Applicable
  03/02/2026 08 PM PST           11.07            429         0      Not Applicable
  03/02/2026 09 PM PST           11.07            429         0      Not Applicable
  03/02/2026 10 PM PST           11.07            429         0      Not Applicable
  03/02/2026 11 PM PST           11.08            431         +      Not Applicable
  03/03/2026 12 AM PST           11.08            431         0      Not Applicable
  03/03/2026 01 AM PST           11.08            431         0      Not Applicable
  03/03/2026 02 AM PST           11.08            431         0      Not Applicable
  03/03/2026 03 AM PST           11.08            431         0      Not Applicable
  03/03/2026 04 AM PST           11.08            431         0      Not Applicable
  03/03/2026 05 AM PST           11.08            431         0      Not Applicable
  03/03/2026 06 AM PST           11.08            431         0      Not Applicable
  03/03/2026 07 AM PST           11.09            434         +      Not Applicable
  03/03/2026 08 AM PST           11.09            434         0      Not Applicable
  03/03/2026 09 AM PST           11.09            434         0      Not Applicable
  03/03/2026 10 AM PST           11.09            434         0      Not Applicable
  03/03/2026 11 AM PST           11.09            434         0      Not Applicable
  03/03/2026 12 PM PST           11.10            436         +      Not Applicable
  03/03/2026 01 PM PST           11.10            436         0      Not Applicable
  03/03/2026 02 PM PST           11.10            436         0      Not Applicable
  03/03/2026 03 PM PST           11.10            436         0      Not Applicable
  03/03/2026 04 PM PST           11.11            440         +      Not Applicable
  03/03/2026 05 PM PST           11.11            440         0      Not Applicable
  03/03/2026 06 PM PST           11.11            440         0      Not Applicable
  03/03/2026 07 PM PST           11.11            440         0      Not Applicable
  03/03/2026 08 PM PST           11.12            443         +      Not Applicable
  03/03/2026 09 PM PST           11.12            443         0      Not Applicable
  03/03/2026 10 PM PST           11.12            443         0      Not Applicable
  03/03/2026 11 PM PST           11.12            443         0      Not Applicable
  03/04/2026 12 AM PST           11.13            446         +      Not Applicable
  03/04/2026 01 AM PST           11.13            446         0      Not Applicable
  03/04/2026 02 AM PST           11.14            450         +      Not Applicable
  03/04/2026 03 AM PST           11.15            453         +      Not Applicable
  03/04/2026 04 AM PST           11.15            453         0      Not Applicable
  03/04/2026 05 AM PST           11.16            457         +      Not Applicable
  03/04/2026 06 AM PST           11.16            457         0      Not Applicable
  03/04/2026 07 AM PST           11.17            460         +      Not Applicable
  03/04/2026 08 AM PST           11.17            460         0      Not Applicable
  03/04/2026 09 AM PST           11.18            463         +      Not Applicable
  03/04/2026 10 AM PST           11.18            463         0      Not Applicable
  03/04/2026 11 AM PST           11.19            467         +      Not Applicable
  03/04/2026 12 PM PST           11.20            470         +      Not Applicable
  03/04/2026 01 PM PST           11.20            470         0      Not Applicable
  03/04/2026 02 PM PST           11.19            467         -      Not Applicable
  03/04/2026 03 PM PST           11.20            470         +      Not Applicable
  03/04/2026 04 PM PST           11.20            470         0      Not Applicable
  03/04/2026 05 PM PST           11.21            474         +      Not Applicable
  03/04/2026 06 PM PST           11.21            474         0      Not Applicable
  03/04/2026 07 PM PST           11.22            477         +      Not Applicable
  03/04/2026 08 PM PST           11.23            481         +      Not Applicable
  03/04/2026 09 PM PST           11.23            481         0      Not Applicable
  03/04/2026 10 PM PST           11.23            481         0      Not Applicable
  03/04/2026 11 PM PST           11.23            481         0      Not Applicable
  03/05/2026 12 AM PST           11.23            481         0      Not Applicable
  03/05/2026 01 AM PST           11.22            477         -      Not Applicable
  03/05/2026 02 AM PST           11.21            474         -      Not Applicable
  03/05/2026 03 AM PST           11.20            470         -      Not Applicable
  03/05/2026 04 AM PST           11.18            463         -      Not Applicable
  03/05/2026 05 AM PST           11.17            460         -      Not Applicable
  03/05/2026 06 AM PST           11.15            453         -      Not Applicable
  03/05/2026 07 AM PST           11.14            450         -      Not Applicable
  03/05/2026 08 AM PST           11.12            443         -      Not Applicable
  03/05/2026 09 AM PST           11.11            440         -      Not Applicable
  03/05/2026 10 AM PST           11.09            434         -      Not Applicable
  03/05/2026 11 AM PST           11.07            429         -      Not Applicable
  03/05/2026 12 PM PST           11.06            426         -      Not Applicable
  03/05/2026 01 PM PST           11.04            421         -      Not Applicable
  03/05/2026 02 PM PST           11.02            416         -      Not Applicable
  03/05/2026 03 PM PST           11.01            413         -      Not Applicable
  03/05/2026 04 PM PST           10.99            408         -      Not Applicable
  03/05/2026 05 PM PST           10.98            406         -      Not Applicable
  03/05/2026 06 PM PST           10.97            403         -      Not Applicable
  03/05/2026 07 PM PST           10.95            398         -      Not Applicable
  03/05/2026 08 PM PST           10.94            396         -      Not Applicable
  03/05/2026 09 PM PST           10.93            393         -      Not Applicable
  03/05/2026 10 PM PST           10.91            388         -      Not Applicable
  03/05/2026 11 PM PST           10.90            386         -      Not Applicable
  03/06/2026 12 AM PST           10.89            384         -      Not Applicable
  03/06/2026 01 AM PST           10.88            381         -      Not Applicable
  03/06/2026 02 AM PST           10.87            379         -      Not Applicable
  03/06/2026 03 AM PST           10.86            376         -      Not Applicable
  03/06/2026 04 AM PST           10.85            374         -      Not Applicable
  03/06/2026 05 AM PST           10.84            372         -      Not Applicable
  03/06/2026 06 AM PST           10.83            369         -      Not Applicable
  03/06/2026 07 AM PST           10.82            367         -      Not Applicable
  03/06/2026 08 AM PST           10.81            364         -      Not Applicable
  03/06/2026 09 AM PST           10.80            362         -      Not Applicable
  03/06/2026 10 AM PST           10.79            360         -      Not Applicable
  03/06/2026 11 AM PST           10.78            357         -      Not Applicable
  03/06/2026 12 PM PST           10.77            355         -      Not Applicable
  03/06/2026 01 PM PST           10.76            353         -      Not Applicable
  03/06/2026 02 PM PST           10.75            350         -      Not Applicable
  03/06/2026 03 PM PST           10.74            348         -      Not Applicable
  03/06/2026 04 PM PST           10.73            346         -      Not Applicable
  03/06/2026 05 PM PST           10.72            343         -      Not Applicable
  03/06/2026 06 PM PST           10.71            341         -      Not Applicable
  03/06/2026 07 PM PST           10.70            339         -      Not Applicable
  03/06/2026 08 PM PST           10.69            336         -      Not Applicable
  03/06/2026 09 PM PST           10.69            336         0      Not Applicable
  03/06/2026 10 PM PST           10.68            334         -      Not Applicable
  03/06/2026 11 PM PST           10.67            332         -      Not Applicable
  03/07/2026 12 AM PST           10.66            329         -      Not Applicable
  03/07/2026 01 AM PST           10.65            327         -      Not Applicable
  03/07/2026 02 AM PST           10.64            325         -      Not Applicable
  03/07/2026 03 AM PST           10.63            323         -      Not Applicable
  03/07/2026 04 AM PST           10.62            320         -      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.