National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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MAD RIVER - ARCATA (ARCC1)
Latitude: 40.91º NLongitude: 124.06º WElevation: 13 FeetForecast Type: Official Location
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Apr 06 2026 at 7:05 AM PDTNext Issuance: Apr 06 2026 at 3:00 PM PDT
Action/Monitor: 15.0 FeetMinor Flood: 22.0 FeetModerate Flood: 24.0 FeetMajor Flood: 28.0 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Mad River - Arcata (ARCC1)
#
# File Generation Time:  04/06/2026 at 07:05 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/02/2026 at 11:00 AM PDT
# Maximum Observed Stage:                       8.26 Feet
# Maximum Observed Flow:                        1063 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/11/2026 at 05:00 AM PDT
# Maximum Forecast Stage:                       7.26 Feet
# Maximum Forecast Flow:                        454 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/01/2026 07 AM PDT            6.72            240                        Normal
  04/01/2026 08 AM PDT            6.71            237         -              Normal
  04/01/2026 09 AM PDT            6.71            237         0              Normal
  04/01/2026 10 AM PDT            6.73            244         +              Normal
  04/01/2026 11 AM PDT            6.75            250         +              Normal
  04/01/2026 12 PM PDT            6.79            264         +              Normal
  04/01/2026 01 PM PDT            6.80            268         +              Normal
  04/01/2026 02 PM PDT            6.80            268         0              Normal
  04/01/2026 03 PM PDT            6.84            282         +              Normal
  04/01/2026 04 PM PDT            6.92            312         +              Normal
  04/01/2026 05 PM PDT            7.02            352         +              Normal
  04/01/2026 06 PM PDT            7.11            391         +              Normal
  04/01/2026 07 PM PDT            7.17            416         +              Normal
  04/01/2026 08 PM PDT            7.27            459         +              Normal
  04/01/2026 09 PM PDT            7.39            512         +              Normal
  04/01/2026 10 PM PDT            7.49            560         +              Normal
  04/01/2026 11 PM PDT            7.64            635         +              Normal
  04/02/2026 12 AM PDT            7.77            706         +              Normal
  04/02/2026 01 AM PDT            7.85            759         +              Normal
  04/02/2026 02 AM PDT            7.91            800         +              Normal
  04/02/2026 03 AM PDT            7.93            814         +              Normal
  04/02/2026 04 AM PDT            8.01            871         +              Normal
  04/02/2026 05 AM PDT            8.09            930         +              Normal
  04/02/2026 06 AM PDT            8.15            976         +              Normal
  04/02/2026 07 AM PDT            8.15            976         0              Normal
  04/02/2026 08 AM PDT            8.18            999         +              Normal
  04/02/2026 09 AM PDT            8.20           1015         +              Normal
  04/02/2026 10 AM PDT            8.25           1055         +              Normal
  04/02/2026 11 AM PDT            8.26           1063         +              Normal
  04/02/2026 12 PM PDT            8.25           1055         -              Normal
  04/02/2026 01 PM PDT            8.24           1047         -              Normal
  04/02/2026 02 PM PDT            8.22           1031         -              Normal
  04/02/2026 03 PM PDT            8.19           1007         -              Normal
  04/02/2026 04 PM PDT            8.22           1031         +              Normal
  04/02/2026 05 PM PDT            8.16            984         -              Normal
  04/02/2026 06 PM PDT            8.14            968         -              Normal
  04/02/2026 07 PM PDT            8.09            930         -              Normal
  04/02/2026 08 PM PDT            8.06            908         -              Normal
  04/02/2026 09 PM PDT            8.02            878         -              Normal
  04/02/2026 10 PM PDT            7.98            849         -              Normal
  04/02/2026 11 PM PDT            7.95            828         -              Normal
  04/03/2026 12 AM PDT            7.91            800         -              Normal
  04/03/2026 01 AM PDT            7.88            779         -              Normal
  04/03/2026 02 AM PDT            7.84            752         -              Normal
  04/03/2026 03 AM PDT            7.84            752         0              Normal
  04/03/2026 04 AM PDT            7.81            732         -              Normal
  04/03/2026 05 AM PDT            7.77            706         -              Normal
  04/03/2026 06 AM PDT            7.74            688         -              Normal
  04/03/2026 07 AM PDT            7.72            677         -              Normal
  04/03/2026 08 AM PDT            7.70            666         -              Normal
  04/03/2026 09 AM PDT            7.68            656         -              Normal
  04/03/2026 10 AM PDT            7.65            640         -              Normal
  04/03/2026 11 AM PDT            7.64            635         -              Normal
  04/03/2026 12 PM PDT            7.62            624         -              Normal
  04/03/2026 01 PM PDT            7.61            619         -              Normal
  04/03/2026 02 PM PDT            7.60            614         -              Normal
  04/03/2026 03 PM PDT            7.60            614         0              Normal
  04/03/2026 04 PM PDT            7.59            609         -              Normal
  04/03/2026 05 PM PDT            7.58            604         -              Normal
  04/03/2026 06 PM PDT            7.57            599         -              Normal
  04/03/2026 07 PM PDT            7.55            589         -              Normal
  04/03/2026 08 PM PDT            7.54            584         -              Normal
  04/03/2026 09 PM PDT            7.52            574         -              Normal
  04/03/2026 10 PM PDT            7.50            565         -              Normal
  04/03/2026 11 PM PDT            7.47            550         -              Normal
  04/04/2026 12 AM PDT            7.46            545         -              Normal
  04/04/2026 01 AM PDT            7.45            541         -              Normal
  04/04/2026 02 AM PDT            7.43            531         -              Normal
  04/04/2026 03 AM PDT            7.42            526         -              Normal
  04/04/2026 04 AM PDT            7.41            522         -              Normal
  04/04/2026 05 AM PDT            7.40            517         -              Normal
  04/04/2026 06 AM PDT            7.37            503         -              Normal
  04/04/2026 07 AM PDT            7.37            503         0              Normal
  04/04/2026 08 AM PDT            7.36            499         -              Normal
  04/04/2026 09 AM PDT            7.35            494         -              Normal
  04/04/2026 10 AM PDT            7.33            485         -              Normal
  04/04/2026 11 AM PDT            7.34            490         +              Normal
  04/04/2026 12 PM PDT            7.32            481         -              Normal
  04/04/2026 01 PM PDT            7.31            476         -              Normal
  04/04/2026 02 PM PDT            7.31            476         0              Normal
  04/04/2026 03 PM PDT            7.29            467         -              Normal
  04/04/2026 04 PM PDT            7.28            463         -              Normal
  04/04/2026 05 PM PDT            7.29            467         +              Normal
  04/04/2026 06 PM PDT            7.28            463         -              Normal
  04/04/2026 07 PM PDT            7.27            459         -              Normal
  04/04/2026 08 PM PDT            7.26            454         -              Normal
  04/04/2026 09 PM PDT            7.26            454         0              Normal
  04/04/2026 10 PM PDT            7.25            450         -              Normal
  04/04/2026 11 PM PDT            7.24            446         -              Normal
  04/05/2026 12 AM PDT            7.22            437         -              Normal
  04/05/2026 01 AM PDT            7.21            433         -              Normal
  04/05/2026 02 AM PDT            7.19            425         -              Normal
  04/05/2026 03 AM PDT            7.19            425         0              Normal
  04/05/2026 04 AM PDT            7.19            425         0              Normal
  04/05/2026 05 AM PDT            7.17            416         -              Normal
  04/05/2026 06 AM PDT            7.17            416         0              Normal
  04/05/2026 07 AM PDT            7.17            416         0              Normal
  04/05/2026 08 AM PDT            7.15            408         -              Normal
  04/05/2026 09 AM PDT            7.15            408         0              Normal
  04/05/2026 10 AM PDT            7.14            404         -              Normal
  04/05/2026 11 AM PDT            7.13            400         -              Normal
  04/05/2026 12 PM PDT            7.12            396         -              Normal
  04/05/2026 01 PM PDT            7.12            396         0              Normal
  04/05/2026 02 PM PDT            7.11            391         -              Normal
  04/05/2026 03 PM PDT            7.11            391         0              Normal
  04/05/2026 04 PM PDT            7.12            396         +              Normal
  04/05/2026 05 PM PDT            7.13            400         +              Normal
  04/05/2026 06 PM PDT            7.12            396         -              Normal
  04/05/2026 07 PM PDT            7.11            391         -              Normal
  04/05/2026 08 PM PDT            7.11            391         0              Normal
  04/05/2026 09 PM PDT            7.10            387         -              Normal
  04/05/2026 10 PM PDT            7.09            382         -              Normal
  04/05/2026 11 PM PDT            7.07            374         -              Normal
  04/06/2026 12 AM PDT            7.07            374         0              Normal
  04/06/2026 01 AM PDT            7.05            365         -              Normal
  04/06/2026 02 AM PDT            7.03            357         -              Normal
  04/06/2026 03 AM PDT            7.02            352         -              Normal
  04/06/2026 04 AM PDT            7.02            352         0              Normal
  04/06/2026 05 AM PDT            7.02            352         0              Normal
  04/06/2026 06 AM PDT            7.02            352         0              Normal
  04/06/2026 07 AM PDT            7.01            348         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/06/2026 08 AM PDT            7.01            348                        Normal
  04/06/2026 09 AM PDT            7.01            348         0              Normal
  04/06/2026 10 AM PDT            7.00            344         -              Normal
  04/06/2026 11 AM PDT            7.00            344         0              Normal
  04/06/2026 12 PM PDT            7.00            344         0              Normal
  04/06/2026 01 PM PDT            6.99            340         -              Normal
  04/06/2026 02 PM PDT            6.99            340         0              Normal
  04/06/2026 03 PM PDT            6.99            340         0              Normal
  04/06/2026 04 PM PDT            6.99            340         0              Normal
  04/06/2026 05 PM PDT            6.99            340         0              Normal
  04/06/2026 06 PM PDT            6.99            340         0              Normal
  04/06/2026 07 PM PDT            6.98            336         -              Normal
  04/06/2026 08 PM PDT            6.98            336         0              Normal
  04/06/2026 09 PM PDT            6.98            336         0              Normal
  04/06/2026 10 PM PDT            6.98            336         0              Normal
  04/06/2026 11 PM PDT            6.98            336         0              Normal
  04/07/2026 12 AM PDT            6.97            332         -              Normal
  04/07/2026 01 AM PDT            6.97            332         0              Normal
  04/07/2026 02 AM PDT            6.96            328         -              Normal
  04/07/2026 03 AM PDT            6.96            328         0              Normal
  04/07/2026 04 AM PDT            6.96            328         0              Normal
  04/07/2026 05 AM PDT            6.96            328         0              Normal
  04/07/2026 06 AM PDT            6.96            328         0              Normal
  04/07/2026 07 AM PDT            6.96            328         0              Normal
  04/07/2026 08 AM PDT            6.96            328         0              Normal
  04/07/2026 09 AM PDT            6.96            328         0              Normal
  04/07/2026 10 AM PDT            6.95            324         -              Normal
  04/07/2026 11 AM PDT            6.95            324         0              Normal
  04/07/2026 12 PM PDT            6.95            324         0              Normal
  04/07/2026 01 PM PDT            6.95            324         0              Normal
  04/07/2026 02 PM PDT            6.95            324         0              Normal
  04/07/2026 03 PM PDT            6.94            320         -              Normal
  04/07/2026 04 PM PDT            6.94            320         0              Normal
  04/07/2026 05 PM PDT            6.94            320         0              Normal
  04/07/2026 06 PM PDT            6.94            320         0              Normal
  04/07/2026 07 PM PDT            6.94            320         0              Normal
  04/07/2026 08 PM PDT            6.94            320         0              Normal
  04/07/2026 09 PM PDT            6.94            320         0              Normal
  04/07/2026 10 PM PDT            6.94            320         0              Normal
  04/07/2026 11 PM PDT            6.94            320         0              Normal
  04/08/2026 12 AM PDT            6.93            316         -              Normal
  04/08/2026 01 AM PDT            6.93            316         0              Normal
  04/08/2026 02 AM PDT            6.93            316         0              Normal
  04/08/2026 03 AM PDT            6.93            316         0              Normal
  04/08/2026 04 AM PDT            6.93            316         0              Normal
  04/08/2026 05 AM PDT            6.93            316         0              Normal
  04/08/2026 06 AM PDT            6.92            312         -              Normal
  04/08/2026 07 AM PDT            6.92            312         0              Normal
  04/08/2026 08 AM PDT            6.92            312         0              Normal
  04/08/2026 09 AM PDT            6.92            312         0              Normal
  04/08/2026 10 AM PDT            6.92            312         0              Normal
  04/08/2026 11 AM PDT            6.92            312         0              Normal
  04/08/2026 12 PM PDT            6.92            312         0              Normal
  04/08/2026 01 PM PDT            6.92            312         0              Normal
  04/08/2026 02 PM PDT            6.91            308         -              Normal
  04/08/2026 03 PM PDT            6.91            308         0              Normal
  04/08/2026 04 PM PDT            6.90            305         -              Normal
  04/08/2026 05 PM PDT            6.90            305         0              Normal
  04/08/2026 06 PM PDT            6.89            301         -              Normal
  04/08/2026 07 PM PDT            6.89            301         0              Normal
  04/08/2026 08 PM PDT            6.89            301         0              Normal
  04/08/2026 09 PM PDT            6.88            297         -              Normal
  04/08/2026 10 PM PDT            6.88            297         0              Normal
  04/08/2026 11 PM PDT            6.88            297         0              Normal
  04/09/2026 12 AM PDT            6.88            297         0              Normal
  04/09/2026 01 AM PDT            6.89            301         +              Normal
  04/09/2026 02 AM PDT            6.89            301         0              Normal
  04/09/2026 03 AM PDT            6.89            301         0              Normal
  04/09/2026 04 AM PDT            6.89            301         0              Normal
  04/09/2026 05 AM PDT            6.89            301         0              Normal
  04/09/2026 06 AM PDT            6.89            301         0              Normal
  04/09/2026 07 AM PDT            6.89            301         0              Normal
  04/09/2026 08 AM PDT            6.89            301         0              Normal
  04/09/2026 09 AM PDT            6.89            301         0              Normal
  04/09/2026 10 AM PDT            6.89            301         0              Normal
  04/09/2026 11 AM PDT            6.89            301         0              Normal
  04/09/2026 12 PM PDT            6.89            301         0              Normal
  04/09/2026 01 PM PDT            6.88            297         -              Normal
  04/09/2026 02 PM PDT            6.88            297         0              Normal
  04/09/2026 03 PM PDT            6.87            293         -              Normal
  04/09/2026 04 PM PDT            6.87            293         0              Normal
  04/09/2026 05 PM PDT            6.86            290         -              Normal
  04/09/2026 06 PM PDT            6.86            290         0              Normal
  04/09/2026 07 PM PDT            6.85            286         -              Normal
  04/09/2026 08 PM PDT            6.85            286         0              Normal
  04/09/2026 09 PM PDT            6.84            282         -              Normal
  04/09/2026 10 PM PDT            6.84            282         0              Normal
  04/09/2026 11 PM PDT            6.84            282         0              Normal
  04/10/2026 12 AM PDT            6.84            282         0              Normal
  04/10/2026 01 AM PDT            6.84            282         0              Normal
  04/10/2026 02 AM PDT            6.84            282         0              Normal
  04/10/2026 03 AM PDT            6.85            286         +              Normal
  04/10/2026 04 AM PDT            6.85            286         0              Normal
  04/10/2026 05 AM PDT            6.85            286         0              Normal
  04/10/2026 06 AM PDT            6.86            290         +              Normal
  04/10/2026 07 AM PDT            6.86            290         0              Normal
  04/10/2026 08 AM PDT            6.86            290         0              Normal
  04/10/2026 09 AM PDT            6.86            290         0              Normal
  04/10/2026 10 AM PDT            6.87            293         +              Normal
  04/10/2026 11 AM PDT            6.87            293         0              Normal
  04/10/2026 12 PM PDT            6.87            293         0              Normal
  04/10/2026 01 PM PDT            6.88            297         +              Normal
  04/10/2026 02 PM PDT            6.88            297         0              Normal
  04/10/2026 03 PM PDT            6.89            301         +              Normal
  04/10/2026 04 PM PDT            6.89            301         0              Normal
  04/10/2026 05 PM PDT            6.90            305         +              Normal
  04/10/2026 06 PM PDT            6.90            305         0              Normal
  04/10/2026 07 PM PDT            6.91            308         +              Normal
  04/10/2026 08 PM PDT            6.91            308         0              Normal
  04/10/2026 09 PM PDT            6.92            312         +              Normal
  04/10/2026 10 PM PDT            6.93            316         +              Normal
  04/10/2026 11 PM PDT            6.96            328         +              Normal
  04/11/2026 12 AM PDT            7.00            344         +              Normal
  04/11/2026 01 AM PDT            7.05            365         +              Normal
  04/11/2026 02 AM PDT            7.11            391         +              Normal
  04/11/2026 03 AM PDT            7.17            416         +              Normal
  04/11/2026 04 AM PDT            7.22            437         +              Normal
  04/11/2026 05 AM PDT            7.26            454         +              Normal
#
# 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.