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 Feet
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: North Coast
Issuance Time: Jul 10 2025 at 7:41 AM PDTNext Issuance: Jul 11 2025 at 9:00 AM 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:  07/10/2025 at 07:42 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  07/05/2025 at 06:00 PM PDT
# Maximum Observed Stage:                       5.88 Feet
# Maximum Observed Flow:                        124 cfs
#
# Earliest Date & Time of Maximum Forecast:     07/10/2025 at 08:00 AM PDT
# Maximum Forecast Stage:                       5.80 Feet
# Maximum Forecast Flow:                        106 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  07/05/2025 07 AM PDT            5.81            108                        Normal
  07/05/2025 08 AM PDT            5.81            108         0              Normal
  07/05/2025 09 AM PDT            5.81            108         0              Normal
  07/05/2025 10 AM PDT            5.82            110         +              Normal
  07/05/2025 11 AM PDT            5.83            113         +              Normal
  07/05/2025 12 PM PDT            5.82            110         -              Normal
  07/05/2025 01 PM PDT            5.83            113         +              Normal
  07/05/2025 02 PM PDT            5.81            108         -              Normal
  07/05/2025 03 PM PDT            5.83            113         +              Normal
  07/05/2025 04 PM PDT            5.84            115         +              Normal
  07/05/2025 05 PM PDT            5.84            115         0              Normal
  07/05/2025 06 PM PDT            5.88            124         +              Normal
  07/05/2025 07 PM PDT            5.87            121         -              Normal
  07/05/2025 08 PM PDT            5.86            119         -              Normal
  07/05/2025 09 PM PDT            5.85            117         -              Normal
  07/05/2025 10 PM PDT            5.84            115         -              Normal
  07/05/2025 11 PM PDT            5.83            113         -              Normal
  07/06/2025 12 AM PDT            5.83            113         0              Normal
  07/06/2025 01 AM PDT            5.81            108         -              Normal
  07/06/2025 02 AM PDT            5.82            110         +              Normal
  07/06/2025 03 AM PDT            5.82            110         0              Normal
  07/06/2025 04 AM PDT            5.81            108         -              Normal
  07/06/2025 05 AM PDT            5.80            106         -              Normal
  07/06/2025 06 AM PDT            5.83            113         +              Normal
  07/06/2025 07 AM PDT            5.81            108         -              Normal
  07/06/2025 08 AM PDT            5.81            108         0              Normal
  07/06/2025 09 AM PDT            5.82            110         +              Normal
  07/06/2025 10 AM PDT            5.81            108         -              Normal
  07/06/2025 11 AM PDT            5.82            110         +              Normal
  07/06/2025 12 PM PDT            5.83            113         +              Normal
  07/06/2025 01 PM PDT            5.80            106         -              Normal
  07/06/2025 02 PM PDT            5.82            110         +              Normal
  07/06/2025 03 PM PDT            5.83            113         +              Normal
  07/06/2025 04 PM PDT            5.83            113         0              Normal
  07/06/2025 05 PM PDT            5.84            115         +              Normal
  07/06/2025 06 PM PDT            5.84            115         0              Normal
  07/06/2025 07 PM PDT            5.84            115         0              Normal
  07/06/2025 08 PM PDT            5.83            113         -              Normal
  07/06/2025 09 PM PDT            5.83            113         0              Normal
  07/06/2025 10 PM PDT            5.82            110         -              Normal
  07/06/2025 11 PM PDT            5.81            108         -              Normal
  07/07/2025 12 AM PDT            5.81            108         0              Normal
  07/07/2025 01 AM PDT            5.80            106         -              Normal
  07/07/2025 02 AM PDT            5.80            106         0              Normal
  07/07/2025 03 AM PDT            5.80            106         0              Normal
  07/07/2025 04 AM PDT            5.80            106         0              Normal
  07/07/2025 05 AM PDT            5.80            106         0              Normal
  07/07/2025 06 AM PDT            5.80            106         0              Normal
  07/07/2025 07 AM PDT            5.79            104         -              Normal
  07/07/2025 08 AM PDT            5.78            102         -              Normal
  07/07/2025 09 AM PDT            5.78            102         0              Normal
  07/07/2025 10 AM PDT            5.79            104         +              Normal
  07/07/2025 11 AM PDT            5.79            104         0              Normal
  07/07/2025 12 PM PDT            5.79            104         0              Normal
  07/07/2025 01 PM PDT            5.78            102         -              Normal
  07/07/2025 02 PM PDT            5.84            115         +              Normal
  07/07/2025 03 PM PDT            5.82            110         -              Normal
  07/07/2025 04 PM PDT            5.84            115         +              Normal
  07/07/2025 05 PM PDT            5.82            110         -              Normal
  07/07/2025 06 PM PDT            5.84            115         +              Normal
  07/07/2025 07 PM PDT            5.84            115         0              Normal
  07/07/2025 08 PM PDT            5.84            115         0              Normal
  07/07/2025 09 PM PDT            5.86            119         +              Normal
  07/07/2025 10 PM PDT            5.84            115         -              Normal
  07/07/2025 11 PM PDT            5.81            108         -              Normal
  07/08/2025 12 AM PDT            5.82            110         +              Normal
  07/08/2025 01 AM PDT            5.79            104         -              Normal
  07/08/2025 02 AM PDT            5.81            108         +              Normal
  07/08/2025 03 AM PDT            5.80            106         -              Normal
  07/08/2025 04 AM PDT            5.83            113         +              Normal
  07/08/2025 05 AM PDT            5.80            106         -              Normal
  07/08/2025 06 AM PDT            5.80            106         0              Normal
  07/08/2025 07 AM PDT            5.81            108         +              Normal
  07/08/2025 08 AM PDT            5.79            104         -              Normal
  07/08/2025 09 AM PDT            5.81            108         +              Normal
  07/08/2025 10 AM PDT            5.83            113         +              Normal
  07/08/2025 11 AM PDT            5.84            115         +              Normal
  07/08/2025 12 PM PDT            5.81            108         -              Normal
  07/08/2025 01 PM PDT            5.81            108         0              Normal
  07/08/2025 02 PM PDT            5.80            106         -              Normal
  07/08/2025 03 PM PDT            5.81            108         +              Normal
  07/08/2025 04 PM PDT            5.82            110         +              Normal
  07/08/2025 05 PM PDT            5.86            119         +              Normal
  07/08/2025 06 PM PDT            5.83            113         -              Normal
  07/08/2025 07 PM PDT            5.84            115         +              Normal
  07/08/2025 08 PM PDT            5.85            117         +              Normal
  07/08/2025 09 PM PDT            5.84            115         -              Normal
  07/08/2025 10 PM PDT            5.83            113         -              Normal
  07/08/2025 11 PM PDT            5.82            110         -              Normal
  07/09/2025 12 AM PDT            5.81            108         -              Normal
  07/09/2025 01 AM PDT            5.80            106         -              Normal
  07/09/2025 02 AM PDT            5.79            104         -              Normal
  07/09/2025 03 AM PDT            5.79            104         0              Normal
  07/09/2025 04 AM PDT            5.81            108         +              Normal
  07/09/2025 05 AM PDT            5.78            102         -              Normal
  07/09/2025 06 AM PDT            5.80            106         +              Normal
  07/09/2025 07 AM PDT            5.80            106         0              Normal
  07/09/2025 08 AM PDT            5.79            104         -              Normal
  07/09/2025 09 AM PDT            5.79            104         0              Normal
  07/09/2025 10 AM PDT            5.80            106         +              Normal
  07/09/2025 11 AM PDT            5.80            106         0              Normal
  07/09/2025 12 PM PDT            5.79            104         -              Normal
  07/09/2025 01 PM PDT            5.79            104         0              Normal
  07/09/2025 02 PM PDT            5.79            104         0              Normal
  07/09/2025 03 PM PDT            5.81            108         +              Normal
  07/09/2025 04 PM PDT            5.81            108         0              Normal
  07/09/2025 05 PM PDT            5.83            113         +              Normal
  07/09/2025 06 PM PDT            5.83            113         0              Normal
  07/09/2025 07 PM PDT            5.84            115         +              Normal
  07/09/2025 08 PM PDT            5.83            113         -              Normal
  07/09/2025 09 PM PDT            5.82            110         -              Normal
  07/09/2025 10 PM PDT            5.81            108         -              Normal
  07/09/2025 11 PM PDT            5.79            104         -              Normal
  07/10/2025 12 AM PDT            5.80            106         +              Normal
  07/10/2025 01 AM PDT            5.79            104         -              Normal
  07/10/2025 02 AM PDT            5.79            104         0              Normal
  07/10/2025 03 AM PDT            5.79            104         0              Normal
  07/10/2025 04 AM PDT            5.79            104         0              Normal
  07/10/2025 05 AM PDT            5.80            106         +              Normal
  07/10/2025 06 AM PDT            5.80            106         0              Normal
  07/10/2025 07 AM PDT            5.80            106         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  07/10/2025 08 AM PDT            5.80            106                        Normal
  07/10/2025 09 AM PDT            5.80            106         0              Normal
  07/10/2025 10 AM PDT            5.80            106         0              Normal
  07/10/2025 11 AM PDT            5.80            106         0              Normal
  07/10/2025 12 PM PDT            5.80            106         0              Normal
  07/10/2025 01 PM PDT            5.80            106         0              Normal
  07/10/2025 02 PM PDT            5.79            104         -              Normal
  07/10/2025 03 PM PDT            5.79            104         0              Normal
  07/10/2025 04 PM PDT            5.79            104         0              Normal
  07/10/2025 05 PM PDT            5.79            104         0              Normal
  07/10/2025 06 PM PDT            5.79            104         0              Normal
  07/10/2025 07 PM PDT            5.79            104         0              Normal
  07/10/2025 08 PM PDT            5.79            104         0              Normal
  07/10/2025 09 PM PDT            5.79            104         0              Normal
  07/10/2025 10 PM PDT            5.79            104         0              Normal
  07/10/2025 11 PM PDT            5.79            104         0              Normal
  07/11/2025 12 AM PDT            5.79            104         0              Normal
  07/11/2025 01 AM PDT            5.79            104         0              Normal
  07/11/2025 02 AM PDT            5.79            104         0              Normal
  07/11/2025 03 AM PDT            5.79            104         0              Normal
  07/11/2025 04 AM PDT            5.79            104         0              Normal
  07/11/2025 05 AM PDT            5.79            104         0              Normal
  07/11/2025 06 AM PDT            5.79            104         0              Normal
  07/11/2025 07 AM PDT            5.79            104         0              Normal
  07/11/2025 08 AM PDT            5.79            104         0              Normal
  07/11/2025 09 AM PDT            5.79            104         0              Normal
  07/11/2025 10 AM PDT            5.79            104         0              Normal
  07/11/2025 11 AM PDT            5.78            102         -              Normal
  07/11/2025 12 PM PDT            5.78            102         0              Normal
  07/11/2025 01 PM PDT            5.78            102         0              Normal
  07/11/2025 02 PM PDT            5.78            102         0              Normal
  07/11/2025 03 PM PDT            5.78            102         0              Normal
  07/11/2025 04 PM PDT            5.78            102         0              Normal
  07/11/2025 05 PM PDT            5.78            102         0              Normal
  07/11/2025 06 PM PDT            5.78            102         0              Normal
  07/11/2025 07 PM PDT            5.78            102         0              Normal
  07/11/2025 08 PM PDT            5.78            102         0              Normal
  07/11/2025 09 PM PDT            5.78            102         0              Normal
  07/11/2025 10 PM PDT            5.78            102         0              Normal
  07/11/2025 11 PM PDT            5.78            102         0              Normal
  07/12/2025 12 AM PDT            5.78            102         0              Normal
  07/12/2025 01 AM PDT            5.78            102         0              Normal
  07/12/2025 02 AM PDT            5.78            102         0              Normal
  07/12/2025 03 AM PDT            5.78            102         0              Normal
  07/12/2025 04 AM PDT            5.78            102         0              Normal
  07/12/2025 05 AM PDT            5.78            102         0              Normal
  07/12/2025 06 AM PDT            5.78            102         0              Normal
  07/12/2025 07 AM PDT            5.77            100         -              Normal
  07/12/2025 08 AM PDT            5.77            100         0              Normal
  07/12/2025 09 AM PDT            5.77            100         0              Normal
  07/12/2025 10 AM PDT            5.77            100         0              Normal
  07/12/2025 11 AM PDT            5.77            100         0              Normal
  07/12/2025 12 PM PDT            5.77            100         0              Normal
  07/12/2025 01 PM PDT            5.77            100         0              Normal
  07/12/2025 02 PM PDT            5.77            100         0              Normal
  07/12/2025 03 PM PDT            5.77            100         0              Normal
  07/12/2025 04 PM PDT            5.77            100         0              Normal
  07/12/2025 05 PM PDT            5.77            100         0              Normal
  07/12/2025 06 PM PDT            5.77            100         0              Normal
  07/12/2025 07 PM PDT            5.77            100         0              Normal
  07/12/2025 08 PM PDT            5.77            100         0              Normal
  07/12/2025 09 PM PDT            5.77            100         0              Normal
  07/12/2025 10 PM PDT            5.77            100         0              Normal
  07/12/2025 11 PM PDT            5.77            100         0              Normal
  07/13/2025 12 AM PDT            5.77            100         0              Normal
  07/13/2025 01 AM PDT            5.77            100         0              Normal
  07/13/2025 02 AM PDT            5.76             98         -              Normal
  07/13/2025 03 AM PDT            5.76             98         0              Normal
  07/13/2025 04 AM PDT            5.76             98         0              Normal
  07/13/2025 05 AM PDT            5.76             98         0              Normal
  07/13/2025 06 AM PDT            5.76             98         0              Normal
  07/13/2025 07 AM PDT            5.76             98         0              Normal
  07/13/2025 08 AM PDT            5.76             98         0              Normal
  07/13/2025 09 AM PDT            5.76             98         0              Normal
  07/13/2025 10 AM PDT            5.76             98         0              Normal
  07/13/2025 11 AM PDT            5.76             98         0              Normal
  07/13/2025 12 PM PDT            5.76             98         0              Normal
  07/13/2025 01 PM PDT            5.76             98         0              Normal
  07/13/2025 02 PM PDT            5.76             98         0              Normal
  07/13/2025 03 PM PDT            5.76             98         0              Normal
  07/13/2025 04 PM PDT            5.76             98         0              Normal
  07/13/2025 05 PM PDT            5.76             98         0              Normal
  07/13/2025 06 PM PDT            5.76             98         0              Normal
  07/13/2025 07 PM PDT            5.76             98         0              Normal
  07/13/2025 08 PM PDT            5.76             98         0              Normal
  07/13/2025 09 PM PDT            5.76             98         0              Normal
  07/13/2025 10 PM PDT            5.75             96         -              Normal
  07/13/2025 11 PM PDT            5.75             96         0              Normal
  07/14/2025 12 AM PDT            5.75             96         0              Normal
  07/14/2025 01 AM PDT            5.75             96         0              Normal
  07/14/2025 02 AM PDT            5.75             96         0              Normal
  07/14/2025 03 AM PDT            5.75             96         0              Normal
  07/14/2025 04 AM PDT            5.75             96         0              Normal
  07/14/2025 05 AM PDT            5.75             96         0              Normal
  07/14/2025 06 AM PDT            5.75             96         0              Normal
  07/14/2025 07 AM PDT            5.75             96         0              Normal
  07/14/2025 08 AM PDT            5.75             96         0              Normal
  07/14/2025 09 AM PDT            5.75             96         0              Normal
  07/14/2025 10 AM PDT            5.75             96         0              Normal
  07/14/2025 11 AM PDT            5.75             96         0              Normal
  07/14/2025 12 PM PDT            5.75             96         0              Normal
  07/14/2025 01 PM PDT            5.75             96         0              Normal
  07/14/2025 02 PM PDT            5.75             96         0              Normal
  07/14/2025 03 PM PDT            5.75             96         0              Normal
  07/14/2025 04 PM PDT            5.75             96         0              Normal
  07/14/2025 05 PM PDT            5.75             96         0              Normal
  07/14/2025 06 PM PDT            5.74             94         -              Normal
  07/14/2025 07 PM PDT            5.74             94         0              Normal
  07/14/2025 08 PM PDT            5.74             94         0              Normal
  07/14/2025 09 PM PDT            5.74             94         0              Normal
  07/14/2025 10 PM PDT            5.74             94         0              Normal
  07/14/2025 11 PM PDT            5.74             94         0              Normal
  07/15/2025 12 AM PDT            5.74             94         0              Normal
  07/15/2025 01 AM PDT            5.74             94         0              Normal
  07/15/2025 02 AM PDT            5.74             94         0              Normal
  07/15/2025 03 AM PDT            5.74             94         0              Normal
  07/15/2025 04 AM PDT            5.74             94         0              Normal
  07/15/2025 05 AM PDT            5.74             94         0              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.