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: Apr 28 2025 at 8:10 AM PDTNext Issuance: Apr 29 2025 at 9:00 AM PDT
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:  04/28/2025 at 08:11 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/23/2025 at 12:00 PM PDT
# Maximum Observed Stage:                       10.23 Feet
# Maximum Observed Flow:                        188 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/28/2025 at 09:00 AM PDT
# Maximum Forecast Stage:                       10.01 Feet
# Maximum Forecast Flow:                        140 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/23/2025 08 AM PDT           10.22            185                Not Applicable
  04/23/2025 09 AM PDT           10.22            185         0      Not Applicable
  04/23/2025 10 AM PDT           10.22            185         0      Not Applicable
  04/23/2025 11 AM PDT           10.22            185         0      Not Applicable
  04/23/2025 12 PM PDT           10.23            188         +      Not Applicable
  04/23/2025 01 PM PDT           10.21            183         -      Not Applicable
  04/23/2025 02 PM PDT           10.22            185         +      Not Applicable
  04/23/2025 03 PM PDT           10.22            185         0      Not Applicable
  04/23/2025 04 PM PDT           10.21            183         -      Not Applicable
  04/23/2025 05 PM PDT           10.22            185         +      Not Applicable
  04/23/2025 06 PM PDT           10.21            183         -      Not Applicable
  04/23/2025 07 PM PDT           10.20            181         -      Not Applicable
  04/23/2025 08 PM PDT           10.20            181         0      Not Applicable
  04/23/2025 09 PM PDT           10.20            181         0      Not Applicable
  04/23/2025 10 PM PDT           10.18            176         -      Not Applicable
  04/23/2025 11 PM PDT           10.19            179         +      Not Applicable
  04/24/2025 12 AM PDT           10.20            181         +      Not Applicable
  04/24/2025 01 AM PDT           10.19            179         -      Not Applicable
  04/24/2025 02 AM PDT           10.19            179         0      Not Applicable
  04/24/2025 03 AM PDT           10.18            176         -      Not Applicable
  04/24/2025 04 AM PDT           10.19            179         +      Not Applicable
  04/24/2025 05 AM PDT           10.18            176         -      Not Applicable
  04/24/2025 06 AM PDT           10.18            176         0      Not Applicable
  04/24/2025 07 AM PDT           10.18            176         0      Not Applicable
  04/24/2025 08 AM PDT           10.18            176         0      Not Applicable
  04/24/2025 09 AM PDT           10.18            176         0      Not Applicable
  04/24/2025 10 AM PDT           10.18            176         0      Not Applicable
  04/24/2025 11 AM PDT           10.17            174         -      Not Applicable
  04/24/2025 12 PM PDT           10.18            176         +      Not Applicable
  04/24/2025 01 PM PDT           10.14            167         -      Not Applicable
  04/24/2025 02 PM PDT           10.18            176         +      Not Applicable
  04/24/2025 03 PM PDT           10.17            174         -      Not Applicable
  04/24/2025 04 PM PDT           10.16            172         -      Not Applicable
  04/24/2025 05 PM PDT           10.17            174         +      Not Applicable
  04/24/2025 06 PM PDT           10.16            172         -      Not Applicable
  04/24/2025 07 PM PDT           10.16            172         0      Not Applicable
  04/24/2025 08 PM PDT           10.15            170         -      Not Applicable
  04/24/2025 09 PM PDT           10.15            170         0      Not Applicable
  04/24/2025 10 PM PDT           10.15            170         0      Not Applicable
  04/24/2025 11 PM PDT           10.15            170         0      Not Applicable
  04/25/2025 12 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 01 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 02 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 03 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 04 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 05 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 06 AM PDT           10.15            170         0      Not Applicable
  04/25/2025 07 AM PDT           10.14            167         -      Not Applicable
  04/25/2025 08 AM PDT           10.14            167         0      Not Applicable
  04/25/2025 09 AM PDT           10.14            167         0      Not Applicable
  04/25/2025 10 AM PDT           10.14            167         0      Not Applicable
  04/25/2025 11 AM PDT           10.14            167         0      Not Applicable
  04/25/2025 12 PM PDT           10.13            165         -      Not Applicable
  04/25/2025 01 PM PDT           10.13            165         0      Not Applicable
  04/25/2025 02 PM PDT           10.13            165         0      Not Applicable
  04/25/2025 03 PM PDT           10.13            165         0      Not Applicable
  04/25/2025 04 PM PDT           10.12            163         -      Not Applicable
  04/25/2025 05 PM PDT           10.13            165         +      Not Applicable
  04/25/2025 06 PM PDT           10.13            165         0      Not Applicable
  04/25/2025 07 PM PDT           10.13            165         0      Not Applicable
  04/25/2025 08 PM PDT           10.15            170         +      Not Applicable
  04/25/2025 09 PM PDT           10.14            167         -      Not Applicable
  04/25/2025 10 PM PDT           10.14            167         0      Not Applicable
  04/25/2025 11 PM PDT           10.14            167         0      Not Applicable
  04/26/2025 12 AM PDT           10.14            167         0      Not Applicable
  04/26/2025 01 AM PDT           10.12            163         -      Not Applicable
  04/26/2025 02 AM PDT           10.12            163         0      Not Applicable
  04/26/2025 03 AM PDT           10.12            163         0      Not Applicable
  04/26/2025 04 AM PDT           10.11            161         -      Not Applicable
  04/26/2025 05 AM PDT           10.12            163         +      Not Applicable
  04/26/2025 06 AM PDT           10.11            161         -      Not Applicable
  04/26/2025 07 AM PDT           10.11            161         0      Not Applicable
  04/26/2025 08 AM PDT           10.11            161         0      Not Applicable
  04/26/2025 09 AM PDT           10.10            159         -      Not Applicable
  04/26/2025 10 AM PDT           10.10            159         0      Not Applicable
  04/26/2025 11 AM PDT           10.11            161         +      Not Applicable
  04/26/2025 12 PM PDT           10.11            161         0      Not Applicable
  04/26/2025 01 PM PDT           10.11            161         0      Not Applicable
  04/26/2025 02 PM PDT           10.10            159         -      Not Applicable
  04/26/2025 03 PM PDT           10.10            159         0      Not Applicable
  04/26/2025 04 PM PDT           10.10            159         0      Not Applicable
  04/26/2025 05 PM PDT           10.09            156         -      Not Applicable
  04/26/2025 06 PM PDT           10.09            156         0      Not Applicable
  04/26/2025 07 PM PDT           10.10            159         +      Not Applicable
  04/26/2025 08 PM PDT           10.09            156         -      Not Applicable
  04/26/2025 09 PM PDT           10.09            156         0      Not Applicable
  04/26/2025 10 PM PDT           10.08            154         -      Not Applicable
  04/26/2025 11 PM PDT           10.08            154         0      Not Applicable
  04/27/2025 12 AM PDT           10.08            154         0      Not Applicable
  04/27/2025 01 AM PDT           10.08            154         0      Not Applicable
  04/27/2025 02 AM PDT           10.08            154         0      Not Applicable
  04/27/2025 03 AM PDT           10.07            152         -      Not Applicable
  04/27/2025 04 AM PDT           10.07            152         0      Not Applicable
  04/27/2025 05 AM PDT           10.07            152         0      Not Applicable
  04/27/2025 06 AM PDT           10.08            154         +      Not Applicable
  04/27/2025 07 AM PDT           10.07            152         -      Not Applicable
  04/27/2025 08 AM PDT           10.06            150         -      Not Applicable
  04/27/2025 09 AM PDT           10.07            152         +      Not Applicable
  04/27/2025 10 AM PDT           10.06            150         -      Not Applicable
  04/27/2025 11 AM PDT           10.06            150         0      Not Applicable
  04/27/2025 12 PM PDT           10.07            152         +      Not Applicable
  04/27/2025 01 PM PDT           10.05            148         -      Not Applicable
  04/27/2025 02 PM PDT           10.05            148         0      Not Applicable
  04/27/2025 03 PM PDT           10.05            148         0      Not Applicable
  04/27/2025 04 PM PDT           10.05            148         0      Not Applicable
  04/27/2025 05 PM PDT           10.05            148         0      Not Applicable
  04/27/2025 06 PM PDT           10.02            142         -      Not Applicable
  04/27/2025 07 PM PDT           10.04            146         +      Not Applicable
  04/27/2025 08 PM PDT           10.03            144         -      Not Applicable
  04/27/2025 09 PM PDT           10.03            144         0      Not Applicable
  04/27/2025 10 PM PDT           10.03            144         0      Not Applicable
  04/27/2025 11 PM PDT           10.03            144         0      Not Applicable
  04/28/2025 12 AM PDT           10.02            142         -      Not Applicable
  04/28/2025 01 AM PDT           10.03            144         +      Not Applicable
  04/28/2025 02 AM PDT           10.02            142         -      Not Applicable
  04/28/2025 03 AM PDT           10.01            140         -      Not Applicable
  04/28/2025 04 AM PDT           10.01            140         0      Not Applicable
  04/28/2025 05 AM PDT           10.00            138         -      Not Applicable
  04/28/2025 06 AM PDT           10.01            140         +      Not Applicable
  04/28/2025 07 AM PDT           10.01            140         0      Not Applicable
  04/28/2025 08 AM PDT           10.01            140         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/28/2025 09 AM PDT           10.01            140                Not Applicable
  04/28/2025 10 AM PDT           10.01            140         0      Not Applicable
  04/28/2025 11 AM PDT           10.00            138         -      Not Applicable
  04/28/2025 12 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 01 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 02 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 03 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 04 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 05 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 06 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 07 PM PDT           10.00            138         0      Not Applicable
  04/28/2025 08 PM PDT            9.99            136         -      Not Applicable
  04/28/2025 09 PM PDT            9.99            136         0      Not Applicable
  04/28/2025 10 PM PDT            9.99            136         0      Not Applicable
  04/28/2025 11 PM PDT            9.99            136         0      Not Applicable
  04/29/2025 12 AM PDT            9.99            136         0      Not Applicable
  04/29/2025 01 AM PDT            9.99            136         0      Not Applicable
  04/29/2025 02 AM PDT            9.99            136         0      Not Applicable
  04/29/2025 03 AM PDT            9.99            136         0      Not Applicable
  04/29/2025 04 AM PDT            9.99            136         0      Not Applicable
  04/29/2025 05 AM PDT            9.98            134         -      Not Applicable
  04/29/2025 06 AM PDT            9.98            134         0      Not Applicable
  04/29/2025 07 AM PDT            9.98            134         0      Not Applicable
  04/29/2025 08 AM PDT            9.98            134         0      Not Applicable
  04/29/2025 09 AM PDT            9.98            134         0      Not Applicable
  04/29/2025 10 AM PDT            9.98            134         0      Not Applicable
  04/29/2025 11 AM PDT            9.98            134         0      Not Applicable
  04/29/2025 12 PM PDT            9.98            134         0      Not Applicable
  04/29/2025 01 PM PDT            9.98            134         0      Not Applicable
  04/29/2025 02 PM PDT            9.97            132         -      Not Applicable
  04/29/2025 03 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 04 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 05 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 06 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 07 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 08 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 09 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 10 PM PDT            9.97            132         0      Not Applicable
  04/29/2025 11 PM PDT            9.97            132         0      Not Applicable
  04/30/2025 12 AM PDT            9.96            130         -      Not Applicable
  04/30/2025 01 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 02 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 03 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 04 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 05 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 06 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 07 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 08 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 09 AM PDT            9.96            130         0      Not Applicable
  04/30/2025 10 AM PDT            9.95            128         -      Not Applicable
  04/30/2025 11 AM PDT            9.95            128         0      Not Applicable
  04/30/2025 12 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 01 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 02 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 03 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 04 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 05 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 06 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 07 PM PDT            9.95            128         0      Not Applicable
  04/30/2025 08 PM PDT            9.94            126         -      Not Applicable
  04/30/2025 09 PM PDT            9.94            126         0      Not Applicable
  04/30/2025 10 PM PDT            9.94            126         0      Not Applicable
  04/30/2025 11 PM PDT            9.94            126         0      Not Applicable
  05/01/2025 12 AM PDT            9.94            126         0      Not Applicable
  05/01/2025 01 AM PDT            9.94            126         0      Not Applicable
  05/01/2025 02 AM PDT            9.94            126         0      Not Applicable
  05/01/2025 03 AM PDT            9.94            126         0      Not Applicable
  05/01/2025 04 AM PDT            9.94            126         0      Not Applicable
  05/01/2025 05 AM PDT            9.94            126         0      Not Applicable
  05/01/2025 06 AM PDT            9.93            124         -      Not Applicable
  05/01/2025 07 AM PDT            9.93            124         0      Not Applicable
  05/01/2025 08 AM PDT            9.93            124         0      Not Applicable
  05/01/2025 09 AM PDT            9.93            124         0      Not Applicable
  05/01/2025 10 AM PDT            9.93            124         0      Not Applicable
  05/01/2025 11 AM PDT            9.93            124         0      Not Applicable
  05/01/2025 12 PM PDT            9.93            124         0      Not Applicable
  05/01/2025 01 PM PDT            9.93            124         0      Not Applicable
  05/01/2025 02 PM PDT            9.93            124         0      Not Applicable
  05/01/2025 03 PM PDT            9.93            124         0      Not Applicable
  05/01/2025 04 PM PDT            9.92            122         -      Not Applicable
  05/01/2025 05 PM PDT            9.92            122         0      Not Applicable
  05/01/2025 06 PM PDT            9.92            122         0      Not Applicable
  05/01/2025 07 PM PDT            9.92            122         0      Not Applicable
  05/01/2025 08 PM PDT            9.92            122         0      Not Applicable
  05/01/2025 09 PM PDT            9.92            122         0      Not Applicable
  05/01/2025 10 PM PDT            9.92            122         0      Not Applicable
  05/01/2025 11 PM PDT            9.92            122         0      Not Applicable
  05/02/2025 12 AM PDT            9.92            122         0      Not Applicable
  05/02/2025 01 AM PDT            9.91            120         -      Not Applicable
  05/02/2025 02 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 03 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 04 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 05 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 06 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 07 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 08 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 09 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 10 AM PDT            9.91            120         0      Not Applicable
  05/02/2025 11 AM PDT            9.90            118         -      Not Applicable
  05/02/2025 12 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 01 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 02 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 03 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 04 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 05 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 06 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 07 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 08 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 09 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 10 PM PDT            9.90            118         0      Not Applicable
  05/02/2025 11 PM PDT            9.90            118         0      Not Applicable
  05/03/2025 12 AM PDT            9.90            118         0      Not Applicable
  05/03/2025 01 AM PDT            9.90            118         0      Not Applicable
  05/03/2025 02 AM PDT            9.90            118         0      Not Applicable
  05/03/2025 03 AM PDT            9.90            118         0      Not Applicable
  05/03/2025 04 AM PDT            9.90            118         0      Not Applicable
  05/03/2025 05 AM PDT            9.91            120         +      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.