MATTOLE RIVER - ETTERSBURG (ETTC1)
Latitude: 40.14º NLongitude: 123.99º WElevation: 579 Feet
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Jan 07 2026 at 7:06 AM PSTNext Issuance: Jan 07 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 - Ettersburg (ETTC1)
#
# File Generation Time:  01/07/2026 at 07:08 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  01/04/2026 at 09:00 AM PST
# Maximum Observed Stage:                       16.37 Feet
# Maximum Observed Flow:                        3609 cfs
#
# Earliest Date & Time of Maximum Forecast:     01/07/2026 at 08:00 AM PST
# Maximum Forecast Stage:                       13.57 Feet
# Maximum Forecast Flow:                        1591 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  01/02/2026 07 AM PST           14.20           1982                Not Applicable
  01/02/2026 08 AM PST           14.19           1976         -      Not Applicable
  01/02/2026 09 AM PST           14.17           1963         -      Not Applicable
  01/02/2026 10 AM PST           14.17           1963         0      Not Applicable
  01/02/2026 11 AM PST           14.16           1956         -      Not Applicable
  01/02/2026 12 PM PST           14.15           1950         -      Not Applicable
  01/02/2026 01 PM PST           14.14           1943         -      Not Applicable
  01/02/2026 02 PM PST           14.11           1924         -      Not Applicable
  01/02/2026 03 PM PST           14.05           1886         -      Not Applicable
  01/02/2026 04 PM PST           14.02           1867         -      Not Applicable
  01/02/2026 05 PM PST           13.95           1823         -      Not Applicable
  01/02/2026 06 PM PST           13.96           1829         +      Not Applicable
  01/02/2026 07 PM PST           13.96           1829         0      Not Applicable
  01/02/2026 08 PM PST           13.98           1841         +      Not Applicable
  01/02/2026 09 PM PST           14.04           1879         +      Not Applicable
  01/02/2026 10 PM PST           14.27           2028         +      Not Applicable
  01/02/2026 11 PM PST           14.79           2383         +      Not Applicable
  01/03/2026 12 AM PST           14.94           2490         +      Not Applicable
  01/03/2026 01 AM PST           14.95           2497         +      Not Applicable
  01/03/2026 02 AM PST           14.93           2482         -      Not Applicable
  01/03/2026 03 AM PST           14.92           2475         -      Not Applicable
  01/03/2026 04 AM PST           14.88           2447         -      Not Applicable
  01/03/2026 05 AM PST           14.88           2447         0      Not Applicable
  01/03/2026 06 AM PST           14.82           2404         -      Not Applicable
  01/03/2026 07 AM PST           14.77           2369         -      Not Applicable
  01/03/2026 08 AM PST           14.73           2341         -      Not Applicable
  01/03/2026 09 AM PST           14.68           2306         -      Not Applicable
  01/03/2026 10 AM PST           14.66           2292         -      Not Applicable
  01/03/2026 11 AM PST           14.62           2264         -      Not Applicable
  01/03/2026 12 PM PST           14.68           2306         +      Not Applicable
  01/03/2026 01 PM PST           14.83           2411         +      Not Applicable
  01/03/2026 02 PM PST           15.03           2555         +      Not Applicable
  01/03/2026 03 PM PST           15.10           2606         +      Not Applicable
  01/03/2026 04 PM PST           15.15           2643         +      Not Applicable
  01/03/2026 05 PM PST           15.16           2650         +      Not Applicable
  01/03/2026 06 PM PST           15.13           2628         -      Not Applicable
  01/03/2026 07 PM PST           15.21           2687         +      Not Applicable
  01/03/2026 08 PM PST           15.22           2694         +      Not Applicable
  01/03/2026 09 PM PST           15.27           2732         +      Not Applicable
  01/03/2026 10 PM PST           15.26           2724         -      Not Applicable
  01/03/2026 11 PM PST           15.23           2702         -      Not Applicable
  01/04/2026 12 AM PST           15.30           2754         +      Not Applicable
  01/04/2026 01 AM PST           15.54           2937         +      Not Applicable
  01/04/2026 02 AM PST           15.87           3197         +      Not Applicable
  01/04/2026 03 AM PST           16.17           3442         +      Not Applicable
  01/04/2026 04 AM PST           16.21           3475         +      Not Applicable
  01/04/2026 05 AM PST           16.24           3500         +      Not Applicable
  01/04/2026 06 AM PST           16.29           3542         +      Not Applicable
  01/04/2026 07 AM PST           16.34           3584         +      Not Applicable
  01/04/2026 08 AM PST           16.36           3601         +      Not Applicable
  01/04/2026 09 AM PST           16.37           3609         +      Not Applicable
  01/04/2026 10 AM PST           16.33           3575         -      Not Applicable
  01/04/2026 11 AM PST           16.32           3567         -      Not Applicable
  01/04/2026 12 PM PST           16.26           3517         -      Not Applicable
  01/04/2026 01 PM PST           16.16           3433         -      Not Applicable
  01/04/2026 02 PM PST           16.06           3351         -      Not Applicable
  01/04/2026 03 PM PST           15.99           3294         -      Not Applicable
  01/04/2026 04 PM PST           15.90           3221         -      Not Applicable
  01/04/2026 05 PM PST           15.85           3181         -      Not Applicable
  01/04/2026 06 PM PST           15.75           3102         -      Not Applicable
  01/04/2026 07 PM PST           15.66           3031         -      Not Applicable
  01/04/2026 08 PM PST           15.57           2961         -      Not Applicable
  01/04/2026 09 PM PST           15.48           2891         -      Not Applicable
  01/04/2026 10 PM PST           15.42           2845         -      Not Applicable
  01/04/2026 11 PM PST           15.36           2800         -      Not Applicable
  01/05/2026 12 AM PST           15.35           2792         -      Not Applicable
  01/05/2026 01 AM PST           15.36           2800         +      Not Applicable
  01/05/2026 02 AM PST           15.46           2876         +      Not Applicable
  01/05/2026 03 AM PST           15.58           2968         +      Not Applicable
  01/05/2026 04 AM PST           15.64           3015         +      Not Applicable
  01/05/2026 05 AM PST           15.60           2984         -      Not Applicable
  01/05/2026 06 AM PST           15.54           2937         -      Not Applicable
  01/05/2026 07 AM PST           15.59           2976         +      Not Applicable
  01/05/2026 08 AM PST           15.69           3054         +      Not Applicable
  01/05/2026 09 AM PST           15.74           3094         +      Not Applicable
  01/05/2026 10 AM PST           15.83           3165         +      Not Applicable
  01/05/2026 11 AM PST           15.85           3181         +      Not Applicable
  01/05/2026 12 PM PST           15.92           3237         +      Not Applicable
  01/05/2026 01 PM PST           15.98           3286         +      Not Applicable
  01/05/2026 02 PM PST           16.02           3318         +      Not Applicable
  01/05/2026 03 PM PST           16.02           3318         0      Not Applicable
  01/05/2026 04 PM PST           15.99           3294         -      Not Applicable
  01/05/2026 05 PM PST           15.96           3270         -      Not Applicable
  01/05/2026 06 PM PST           15.89           3213         -      Not Applicable
  01/05/2026 07 PM PST           15.87           3197         -      Not Applicable
  01/05/2026 08 PM PST           15.80           3141         -      Not Applicable
  01/05/2026 09 PM PST           15.73           3086         -      Not Applicable
  01/05/2026 10 PM PST           15.67           3039         -      Not Applicable
  01/05/2026 11 PM PST           15.63           3007         -      Not Applicable
  01/06/2026 12 AM PST           15.54           2937         -      Not Applicable
  01/06/2026 01 AM PST           15.46           2876         -      Not Applicable
  01/06/2026 02 AM PST           15.38           2815         -      Not Applicable
  01/06/2026 03 AM PST           15.30           2754         -      Not Applicable
  01/06/2026 04 AM PST           15.20           2680         -      Not Applicable
  01/06/2026 05 AM PST           15.12           2620         -      Not Applicable
  01/06/2026 06 AM PST           15.07           2584         -      Not Applicable
  01/06/2026 07 AM PST           14.99           2526         -      Not Applicable
  01/06/2026 08 AM PST           14.91           2468         -      Not Applicable
  01/06/2026 09 AM PST           14.85           2425         -      Not Applicable
  01/06/2026 10 AM PST           14.79           2383         -      Not Applicable
  01/06/2026 11 AM PST           14.70           2320         -      Not Applicable
  01/06/2026 12 PM PST           14.62           2264         -      Not Applicable
  01/06/2026 01 PM PST           14.56           2223         -      Not Applicable
  01/06/2026 02 PM PST           14.50           2182         -      Not Applicable
  01/06/2026 03 PM PST           14.42           2128         -      Not Applicable
  01/06/2026 04 PM PST           14.38           2101         -      Not Applicable
  01/06/2026 05 PM PST           14.33           2068         -      Not Applicable
  01/06/2026 06 PM PST           14.24           2009         -      Not Applicable
  01/06/2026 07 PM PST           14.21           1989         -      Not Applicable
  01/06/2026 08 PM PST           14.14           1943         -      Not Applicable
  01/06/2026 09 PM PST           14.07           1899         -      Not Applicable
  01/06/2026 10 PM PST           14.03           1873         -      Not Applicable
  01/06/2026 11 PM PST           14.00           1854         -      Not Applicable
  01/07/2026 12 AM PST           13.91           1797         -      Not Applicable
  01/07/2026 01 AM PST           13.87           1773         -      Not Applicable
  01/07/2026 02 AM PST           13.83           1748         -      Not Applicable
  01/07/2026 03 AM PST           13.78           1717         -      Not Applicable
  01/07/2026 04 AM PST           13.74           1693         -      Not Applicable
  01/07/2026 05 AM PST           13.70           1669         -      Not Applicable
  01/07/2026 06 AM PST           13.66           1644         -      Not Applicable
  01/07/2026 07 AM PST           13.61           1615         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  01/07/2026 08 AM PST           13.57           1591                Not Applicable
  01/07/2026 09 AM PST           13.53           1567         -      Not Applicable
  01/07/2026 10 AM PST           13.48           1538         -      Not Applicable
  01/07/2026 11 AM PST           13.44           1515         -      Not Applicable
  01/07/2026 12 PM PST           13.40           1492         -      Not Applicable
  01/07/2026 01 PM PST           13.36           1469         -      Not Applicable
  01/07/2026 02 PM PST           13.31           1440         -      Not Applicable
  01/07/2026 03 PM PST           13.27           1418         -      Not Applicable
  01/07/2026 04 PM PST           13.23           1395         -      Not Applicable
  01/07/2026 05 PM PST           13.19           1373         -      Not Applicable
  01/07/2026 06 PM PST           13.15           1351         -      Not Applicable
  01/07/2026 07 PM PST           13.11           1329         -      Not Applicable
  01/07/2026 08 PM PST           13.07           1307         -      Not Applicable
  01/07/2026 09 PM PST           13.03           1286         -      Not Applicable
  01/07/2026 10 PM PST           13.00           1269         -      Not Applicable
  01/07/2026 11 PM PST           12.97           1253         -      Not Applicable
  01/08/2026 12 AM PST           12.96           1248         -      Not Applicable
  01/08/2026 01 AM PST           12.96           1248         0      Not Applicable
  01/08/2026 02 AM PST           12.97           1253         +      Not Applicable
  01/08/2026 03 AM PST           12.98           1259         +      Not Applicable
  01/08/2026 04 AM PST           12.99           1264         +      Not Applicable
  01/08/2026 05 AM PST           12.98           1259         -      Not Applicable
  01/08/2026 06 AM PST           12.95           1243         -      Not Applicable
  01/08/2026 07 AM PST           12.91           1222         -      Not Applicable
  01/08/2026 08 AM PST           12.86           1195         -      Not Applicable
  01/08/2026 09 AM PST           12.81           1169         -      Not Applicable
  01/08/2026 10 AM PST           12.76           1144         -      Not Applicable
  01/08/2026 11 AM PST           12.71           1118         -      Not Applicable
  01/08/2026 12 PM PST           12.66           1093         -      Not Applicable
  01/08/2026 01 PM PST           12.63           1078         -      Not Applicable
  01/08/2026 02 PM PST           12.59           1058         -      Not Applicable
  01/08/2026 03 PM PST           12.56           1043         -      Not Applicable
  01/08/2026 04 PM PST           12.53           1028         -      Not Applicable
  01/08/2026 05 PM PST           12.51           1019         -      Not Applicable
  01/08/2026 06 PM PST           12.48           1004         -      Not Applicable
  01/08/2026 07 PM PST           12.46            994         -      Not Applicable
  01/08/2026 08 PM PST           12.45            990         -      Not Applicable
  01/08/2026 09 PM PST           12.44            985         -      Not Applicable
  01/08/2026 10 PM PST           12.42            975         -      Not Applicable
  01/08/2026 11 PM PST           12.40            966         -      Not Applicable
  01/09/2026 12 AM PST           12.38            956         -      Not Applicable
  01/09/2026 01 AM PST           12.36            947         -      Not Applicable
  01/09/2026 02 AM PST           12.34            937         -      Not Applicable
  01/09/2026 03 AM PST           12.32            928         -      Not Applicable
  01/09/2026 04 AM PST           12.31            923         -      Not Applicable
  01/09/2026 05 AM PST           12.29            914         -      Not Applicable
  01/09/2026 06 AM PST           12.27            905         -      Not Applicable
  01/09/2026 07 AM PST           12.25            895         -      Not Applicable
  01/09/2026 08 AM PST           12.23            886         -      Not Applicable
  01/09/2026 09 AM PST           12.22            882         -      Not Applicable
  01/09/2026 10 AM PST           12.20            873         -      Not Applicable
  01/09/2026 11 AM PST           12.18            864         -      Not Applicable
  01/09/2026 12 PM PST           12.17            859         -      Not Applicable
  01/09/2026 01 PM PST           12.15            850         -      Not Applicable
  01/09/2026 02 PM PST           12.14            845         -      Not Applicable
  01/09/2026 03 PM PST           12.12            837         -      Not Applicable
  01/09/2026 04 PM PST           12.11            832         -      Not Applicable
  01/09/2026 05 PM PST           12.09            823         -      Not Applicable
  01/09/2026 06 PM PST           12.07            814         -      Not Applicable
  01/09/2026 07 PM PST           12.06            810         -      Not Applicable
  01/09/2026 08 PM PST           12.04            801         -      Not Applicable
  01/09/2026 09 PM PST           12.03            797         -      Not Applicable
  01/09/2026 10 PM PST           12.02            792         -      Not Applicable
  01/09/2026 11 PM PST           12.00            784         -      Not Applicable
  01/10/2026 12 AM PST           11.99            779         -      Not Applicable
  01/10/2026 01 AM PST           11.97            771         -      Not Applicable
  01/10/2026 02 AM PST           11.96            766         -      Not Applicable
  01/10/2026 03 AM PST           11.95            762         -      Not Applicable
  01/10/2026 04 AM PST           11.93            753         -      Not Applicable
  01/10/2026 05 AM PST           11.92            749         -      Not Applicable
  01/10/2026 06 AM PST           11.90            741         -      Not Applicable
  01/10/2026 07 AM PST           11.89            736         -      Not Applicable
  01/10/2026 08 AM PST           11.88            732         -      Not Applicable
  01/10/2026 09 AM PST           11.87            728         -      Not Applicable
  01/10/2026 10 AM PST           11.85            720         -      Not Applicable
  01/10/2026 11 AM PST           11.84            715         -      Not Applicable
  01/10/2026 12 PM PST           11.83            711         -      Not Applicable
  01/10/2026 01 PM PST           11.81            703         -      Not Applicable
  01/10/2026 02 PM PST           11.80            699         -      Not Applicable
  01/10/2026 03 PM PST           11.79            695         -      Not Applicable
  01/10/2026 04 PM PST           11.78            691         -      Not Applicable
  01/10/2026 05 PM PST           11.76            682         -      Not Applicable
  01/10/2026 06 PM PST           11.75            678         -      Not Applicable
  01/10/2026 07 PM PST           11.74            674         -      Not Applicable
  01/10/2026 08 PM PST           11.72            666         -      Not Applicable
  01/10/2026 09 PM PST           11.71            662         -      Not Applicable
  01/10/2026 10 PM PST           11.70            658         -      Not Applicable
  01/10/2026 11 PM PST           11.69            654         -      Not Applicable
  01/11/2026 12 AM PST           11.68            650         -      Not Applicable
  01/11/2026 01 AM PST           11.66            642         -      Not Applicable
  01/11/2026 02 AM PST           11.65            638         -      Not Applicable
  01/11/2026 03 AM PST           11.64            634         -      Not Applicable
  01/11/2026 04 AM PST           11.63            630         -      Not Applicable
  01/11/2026 05 AM PST           11.62            626         -      Not Applicable
  01/11/2026 06 AM PST           11.61            622         -      Not Applicable
  01/11/2026 07 AM PST           11.59            614         -      Not Applicable
  01/11/2026 08 AM PST           11.58            611         -      Not Applicable
  01/11/2026 09 AM PST           11.57            607         -      Not Applicable
  01/11/2026 10 AM PST           11.56            603         -      Not Applicable
  01/11/2026 11 AM PST           11.55            599         -      Not Applicable
  01/11/2026 12 PM PST           11.54            595         -      Not Applicable
  01/11/2026 01 PM PST           11.53            591         -      Not Applicable
  01/11/2026 02 PM PST           11.52            587         -      Not Applicable
  01/11/2026 03 PM PST           11.50            580         -      Not Applicable
  01/11/2026 04 PM PST           11.49            576         -      Not Applicable
  01/11/2026 05 PM PST           11.48            572         -      Not Applicable
  01/11/2026 06 PM PST           11.47            568         -      Not Applicable
  01/11/2026 07 PM PST           11.46            565         -      Not Applicable
  01/11/2026 08 PM PST           11.45            561         -      Not Applicable
  01/11/2026 09 PM PST           11.44            557         -      Not Applicable
  01/11/2026 10 PM PST           11.43            553         -      Not Applicable
  01/11/2026 11 PM PST           11.42            550         -      Not Applicable
  01/12/2026 12 AM PST           11.41            546         -      Not Applicable
  01/12/2026 01 AM PST           11.40            542         -      Not Applicable
  01/12/2026 02 AM PST           11.39            538         -      Not Applicable
  01/12/2026 03 AM PST           11.38            535         -      Not Applicable
  01/12/2026 04 AM PST           11.37            531         -      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.