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 CaliforniaRiver Group: North Coast
Issuance Time: Sep 23 2021 at 7:26 AM PDTNext Issuance: Sep 24 2021 at 9:00 AM PDT
Monitor Stage: 15.0 FeetFlood Stage: 22.0 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Mad River - Arcata (ARCC1)
#
# File Generation Time:  09/23/2021 at 07:26 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  09/18/2021 at 08:00 PM PDT
# Maximum Observed Stage:                       5.6 Feet
# Maximum Observed Flow:                        66 cfs
#
# Earliest Date & Time of Maximum Forecast:     09/28/2021 at 05:00 AM PDT
# Maximum Forecast Stage:                       5.5 Feet
# Maximum Forecast Flow:                        53 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  09/18/2021 07 AM PDT             5.4             38                        Normal
  09/18/2021 08 AM PDT             5.4             39         +              Normal
  09/18/2021 09 AM PDT             5.4             44         +              Normal
  09/18/2021 10 AM PDT             5.5             49         +              Normal
  09/18/2021 11 AM PDT             5.5             54         +              Normal
  09/18/2021 12 PM PDT             5.6             57         +              Normal
  09/18/2021 01 PM PDT             5.6             57         0              Normal
  09/18/2021 02 PM PDT             5.5             56         -              Normal
  09/18/2021 03 PM PDT             5.5             55         -              Normal
  09/18/2021 04 PM PDT             5.5             55         0              Normal
  09/18/2021 05 PM PDT             5.6             61         +              Normal
  09/18/2021 06 PM PDT             5.6             65         +              Normal
  09/18/2021 07 PM PDT             5.6             63         -              Normal
  09/18/2021 08 PM PDT             5.6             66         +              Normal
  09/18/2021 09 PM PDT             5.6             65         -              Normal
  09/18/2021 10 PM PDT             5.6             65         0              Normal
  09/18/2021 11 PM PDT             5.6             62         -              Normal
  09/19/2021 12 AM PDT             5.6             59         -              Normal
  09/19/2021 01 AM PDT             5.5             55         -              Normal
  09/19/2021 02 AM PDT             5.5             53         -              Normal
  09/19/2021 03 AM PDT             5.5             52         -              Normal
  09/19/2021 04 AM PDT             5.5             48         -              Normal
  09/19/2021 05 AM PDT             5.5             48         0              Normal
  09/19/2021 06 AM PDT             5.5             50         +              Normal
  09/19/2021 07 AM PDT             5.5             55         +              Normal
  09/19/2021 08 AM PDT             5.5             53         -              Normal
  09/19/2021 09 AM PDT             5.5             54         +              Normal
  09/19/2021 10 AM PDT             5.5             53         -              Normal
  09/19/2021 11 AM PDT             5.5             52         -              Normal
  09/19/2021 12 PM PDT             5.5             51         -              Normal
  09/19/2021 01 PM PDT             5.5             48         -              Normal
  09/19/2021 02 PM PDT             5.5             46         -              Normal
  09/19/2021 03 PM PDT             5.5             46         0              Normal
  09/19/2021 04 PM PDT             5.5             50         +              Normal
  09/19/2021 05 PM PDT             5.5             52         +              Normal
  09/19/2021 06 PM PDT             5.5             53         +              Normal
  09/19/2021 07 PM PDT             5.5             54         +              Normal
  09/19/2021 08 PM PDT             5.5             55         +              Normal
  09/19/2021 09 PM PDT             5.5             55         0              Normal
  09/19/2021 10 PM PDT             5.5             56         +              Normal
  09/19/2021 11 PM PDT             5.5             53         -              Normal
  09/20/2021 12 AM PDT             5.5             52         -              Normal
  09/20/2021 01 AM PDT             5.5             49         -              Normal
  09/20/2021 02 AM PDT             5.5             47         -              Normal
  09/20/2021 03 AM PDT             5.4             45         -              Normal
  09/20/2021 04 AM PDT             5.4             43         -              Normal
  09/20/2021 05 AM PDT             5.4             41         -              Normal
  09/20/2021 06 AM PDT             5.4             41         0              Normal
  09/20/2021 07 AM PDT             5.4             42         +              Normal
  09/20/2021 08 AM PDT             5.4             44         +              Normal
  09/20/2021 09 AM PDT             5.5             47         +              Normal
  09/20/2021 10 AM PDT             5.5             47         0              Normal
  09/20/2021 11 AM PDT             5.5             48         +              Normal
  09/20/2021 12 PM PDT             5.5             51         +              Normal
  09/20/2021 01 PM PDT             5.5             52         +              Normal
  09/20/2021 02 PM PDT             5.5             51         -              Normal
  09/20/2021 03 PM PDT             5.5             50         -              Normal
  09/20/2021 04 PM PDT             5.5             53         +              Normal
  09/20/2021 05 PM PDT             5.5             55         +              Normal
  09/20/2021 06 PM PDT             5.6             57         +              Normal
  09/20/2021 07 PM PDT             5.6             59         +              Normal
  09/20/2021 08 PM PDT             5.6             60         +              Normal
  09/20/2021 09 PM PDT             5.6             61         +              Normal
  09/20/2021 10 PM PDT             5.6             61         0              Normal
  09/20/2021 11 PM PDT             5.6             57         -              Normal
  09/21/2021 12 AM PDT             5.6             57         0              Normal
  09/21/2021 01 AM PDT             5.5             55         -              Normal
  09/21/2021 02 AM PDT             5.5             53         -              Normal
  09/21/2021 03 AM PDT             5.5             54         +              Normal
  09/21/2021 04 AM PDT             5.5             51         -              Normal
  09/21/2021 05 AM PDT             5.5             50         -              Normal
  09/21/2021 06 AM PDT             5.5             49         -              Normal
  09/21/2021 07 AM PDT             5.5             49         0              Normal
  09/21/2021 08 AM PDT             5.5             47         -              Normal
  09/21/2021 09 AM PDT             5.5             46         -              Normal
  09/21/2021 10 AM PDT             5.5             46         0              Normal
  09/21/2021 11 AM PDT             5.4             45         -              Normal
  09/21/2021 12 PM PDT             5.4             45         0              Normal
  09/21/2021 01 PM PDT             5.5             46         +              Normal
  09/21/2021 02 PM PDT             5.5             47         +              Normal
  09/21/2021 03 PM PDT             5.5             47         0              Normal
  09/21/2021 04 PM PDT             5.5             46         -              Normal
  09/21/2021 05 PM PDT             5.5             49         +              Normal
  09/21/2021 06 PM PDT             5.5             50         +              Normal
  09/21/2021 07 PM PDT             5.5             51         +              Normal
  09/21/2021 08 PM PDT             5.5             53         +              Normal
  09/21/2021 09 PM PDT             5.5             52         -              Normal
  09/21/2021 10 PM PDT             5.5             54         +              Normal
  09/21/2021 11 PM PDT             5.5             52         -              Normal
  09/22/2021 12 AM PDT             5.5             50         -              Normal
  09/22/2021 01 AM PDT             5.5             47         -              Normal
  09/22/2021 02 AM PDT             5.4             45         -              Normal
  09/22/2021 03 AM PDT             5.4             42         -              Normal
  09/22/2021 04 AM PDT             5.4             39         -              Normal
  09/22/2021 05 AM PDT             5.4             39         0              Normal
  09/22/2021 06 AM PDT             5.4             39         0              Normal
  09/22/2021 07 AM PDT             5.4             41         +              Normal
  09/22/2021 08 AM PDT             5.4             42         +              Normal
  09/22/2021 09 AM PDT             5.4             41         -              Normal
  09/22/2021 10 AM PDT             5.4             41         0              Normal
  09/22/2021 11 AM PDT             5.4             39         -              Normal
  09/22/2021 12 PM PDT             5.4             39         -              Normal
  09/22/2021 01 PM PDT             5.4             39         0              Normal
  09/22/2021 02 PM PDT             5.4             39         0              Normal
  09/22/2021 03 PM PDT             5.4             39         0              Normal
  09/22/2021 04 PM PDT             5.4             41         +              Normal
  09/22/2021 05 PM PDT             5.4             43         +              Normal
  09/22/2021 06 PM PDT             5.5             46         +              Normal
  09/22/2021 07 PM PDT             5.5             47         +              Normal
  09/22/2021 08 PM PDT             5.5             48         +              Normal
  09/22/2021 09 PM PDT             5.5             49         +              Normal
  09/22/2021 10 PM PDT             5.5             50         +              Normal
  09/22/2021 11 PM PDT             5.5             48         -              Normal
  09/23/2021 12 AM PDT             5.5             47         -              Normal
  09/23/2021 01 AM PDT             5.4             45         -              Normal
  09/23/2021 02 AM PDT             5.4             43         -              Normal
  09/23/2021 03 AM PDT             5.4             41         -              Normal
  09/23/2021 04 AM PDT             5.3             37         -              Normal
  09/23/2021 05 AM PDT             5.3             36         -              Normal
  09/23/2021 06 AM PDT             5.3             36         0              Normal
  09/23/2021 07 AM PDT             5.3             36         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  09/23/2021 08 AM PDT             5.3             36                        Normal
  09/23/2021 09 AM PDT             5.3             36         0              Normal
  09/23/2021 10 AM PDT             5.3             36         0              Normal
  09/23/2021 11 AM PDT             5.3             35         -              Normal
  09/23/2021 12 PM PDT             5.3             35         0              Normal
  09/23/2021 01 PM PDT             5.3             35         0              Normal
  09/23/2021 02 PM PDT             5.3             35         0              Normal
  09/23/2021 03 PM PDT             5.3             35         0              Normal
  09/23/2021 04 PM PDT             5.3             35         0              Normal
  09/23/2021 05 PM PDT             5.3             35         0              Normal
  09/23/2021 06 PM PDT             5.3             35         0              Normal
  09/23/2021 07 PM PDT             5.3             35         0              Normal
  09/23/2021 08 PM PDT             5.3             35         0              Normal
  09/23/2021 09 PM PDT             5.3             35         0              Normal
  09/23/2021 10 PM PDT             5.3             35         0              Normal
  09/23/2021 11 PM PDT             5.3             35         0              Normal
  09/24/2021 12 AM PDT             5.3             35         0              Normal
  09/24/2021 01 AM PDT             5.3             35         0              Normal
  09/24/2021 02 AM PDT             5.3             35         0              Normal
  09/24/2021 03 AM PDT             5.3             35         0              Normal
  09/24/2021 04 AM PDT             5.3             35         0              Normal
  09/24/2021 05 AM PDT             5.3             35         0              Normal
  09/24/2021 06 AM PDT             5.3             35         0              Normal
  09/24/2021 07 AM PDT             5.3             34         -              Normal
  09/24/2021 08 AM PDT             5.3             34         0              Normal
  09/24/2021 09 AM PDT             5.3             34         0              Normal
  09/24/2021 10 AM PDT             5.3             34         0              Normal
  09/24/2021 11 AM PDT             5.3             34         0              Normal
  09/24/2021 12 PM PDT             5.3             34         0              Normal
  09/24/2021 01 PM PDT             5.3             34         0              Normal
  09/24/2021 02 PM PDT             5.3             34         0              Normal
  09/24/2021 03 PM PDT             5.3             34         0              Normal
  09/24/2021 04 PM PDT             5.3             34         0              Normal
  09/24/2021 05 PM PDT             5.3             34         0              Normal
  09/24/2021 06 PM PDT             5.3             33         -              Normal
  09/24/2021 07 PM PDT             5.3             33         0              Normal
  09/24/2021 08 PM PDT             5.3             33         0              Normal
  09/24/2021 09 PM PDT             5.3             33         0              Normal
  09/24/2021 10 PM PDT             5.3             33         0              Normal
  09/24/2021 11 PM PDT             5.3             33         0              Normal
  09/25/2021 12 AM PDT             5.3             33         0              Normal
  09/25/2021 01 AM PDT             5.3             33         0              Normal
  09/25/2021 02 AM PDT             5.3             33         0              Normal
  09/25/2021 03 AM PDT             5.3             33         0              Normal
  09/25/2021 04 AM PDT             5.3             33         0              Normal
  09/25/2021 05 AM PDT             5.3             33         0              Normal
  09/25/2021 06 AM PDT             5.3             33         0              Normal
  09/25/2021 07 AM PDT             5.3             33         0              Normal
  09/25/2021 08 AM PDT             5.3             33         0              Normal
  09/25/2021 09 AM PDT             5.3             33         0              Normal
  09/25/2021 10 AM PDT             5.3             33         0              Normal
  09/25/2021 11 AM PDT             5.3             33         0              Normal
  09/25/2021 12 PM PDT             5.3             33         0              Normal
  09/25/2021 01 PM PDT             5.3             33         0              Normal
  09/25/2021 02 PM PDT             5.3             32         -              Normal
  09/25/2021 03 PM PDT             5.3             32         0              Normal
  09/25/2021 04 PM PDT             5.3             32         0              Normal
  09/25/2021 05 PM PDT             5.3             32         0              Normal
  09/25/2021 06 PM PDT             5.3             32         0              Normal
  09/25/2021 07 PM PDT             5.3             32         0              Normal
  09/25/2021 08 PM PDT             5.3             32         0              Normal
  09/25/2021 09 PM PDT             5.3             32         0              Normal
  09/25/2021 10 PM PDT             5.3             32         0              Normal
  09/25/2021 11 PM PDT             5.3             32         0              Normal
  09/26/2021 12 AM PDT             5.3             32         0              Normal
  09/26/2021 01 AM PDT             5.3             32         0              Normal
  09/26/2021 02 AM PDT             5.3             32         0              Normal
  09/26/2021 03 AM PDT             5.3             32         0              Normal
  09/26/2021 04 AM PDT             5.3             32         0              Normal
  09/26/2021 05 AM PDT             5.3             32         0              Normal
  09/26/2021 06 AM PDT             5.3             32         0              Normal
  09/26/2021 07 AM PDT             5.3             32         0              Normal
  09/26/2021 08 AM PDT             5.3             32         0              Normal
  09/26/2021 09 AM PDT             5.3             32         0              Normal
  09/26/2021 10 AM PDT             5.3             32         0              Normal
  09/26/2021 11 AM PDT             5.3             32         0              Normal
  09/26/2021 12 PM PDT             5.3             32         0              Normal
  09/26/2021 01 PM PDT             5.3             32         -              Normal
  09/26/2021 02 PM PDT             5.3             32         0              Normal
  09/26/2021 03 PM PDT             5.3             32         0              Normal
  09/26/2021 04 PM PDT             5.3             32         0              Normal
  09/26/2021 05 PM PDT             5.3             32         0              Normal
  09/26/2021 06 PM PDT             5.3             32         0              Normal
  09/26/2021 07 PM PDT             5.3             32         0              Normal
  09/26/2021 08 PM PDT             5.3             32         0              Normal
  09/26/2021 09 PM PDT             5.3             32         0              Normal
  09/26/2021 10 PM PDT             5.3             32         0              Normal
  09/26/2021 11 PM PDT             5.3             32         0              Normal
  09/27/2021 12 AM PDT             5.3             32         0              Normal
  09/27/2021 01 AM PDT             5.3             32         0              Normal
  09/27/2021 02 AM PDT             5.3             32         0              Normal
  09/27/2021 03 AM PDT             5.3             32         0              Normal
  09/27/2021 04 AM PDT             5.3             32         0              Normal
  09/27/2021 05 AM PDT             5.3             32         0              Normal
  09/27/2021 06 AM PDT             5.3             32         0              Normal
  09/27/2021 07 AM PDT             5.3             32         0              Normal
  09/27/2021 08 AM PDT             5.3             32         0              Normal
  09/27/2021 09 AM PDT             5.3             32         0              Normal
  09/27/2021 10 AM PDT             5.3             32         0              Normal
  09/27/2021 11 AM PDT             5.3             32         0              Normal
  09/27/2021 12 PM PDT             5.3             32         0              Normal
  09/27/2021 01 PM PDT             5.3             32         0              Normal
  09/27/2021 02 PM PDT             5.3             32         0              Normal
  09/27/2021 03 PM PDT             5.3             32         0              Normal
  09/27/2021 04 PM PDT             5.3             32         0              Normal
  09/27/2021 05 PM PDT             5.3             32         0              Normal
  09/27/2021 06 PM PDT             5.3             32         +              Normal
  09/27/2021 07 PM PDT             5.3             33         +              Normal
  09/27/2021 08 PM PDT             5.3             34         +              Normal
  09/27/2021 09 PM PDT             5.3             35         +              Normal
  09/27/2021 10 PM PDT             5.3             36         +              Normal
  09/27/2021 11 PM PDT             5.4             38         +              Normal
  09/28/2021 12 AM PDT             5.4             39         +              Normal
  09/28/2021 01 AM PDT             5.4             42         +              Normal
  09/28/2021 02 AM PDT             5.4             44         +              Normal
  09/28/2021 03 AM PDT             5.5             47         +              Normal
  09/28/2021 04 AM PDT             5.5             50         +              Normal
  09/28/2021 05 AM PDT             5.5             53         +              Normal
#
# NOTE 1: Stages are rounded to the nearest tenth (.1) 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.