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MAD RIVER - ARCATA (ARCC1)
| Latitude: 40.91º N | Longitude: 124.06º W | Elevation: 13 Feet | | | |
| Location: Humboldt County in California | Bulletin Group: North Coast | River Group: North Coast |
| Issuance Time: | Dec 24 2025 at 2:06 PM PST | Next Issuance: | Dec 25 2025 at 9:00 AM PST
| |
| Action/Monitor: 15.0 Feet | Minor Flood: 22.0 Feet | Moderate Flood: 24.0 Feet | Major Flood: 28.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Mad River - Arcata (ARCC1)
#
# File Generation Time: 12/24/2025 at 02:06 PM PST
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 12/21/2025 at 04:00 PM PST
# Maximum Observed Stage: 24.70 Feet
# Maximum Observed Flow: 42532 cfs
#
# Earliest Date & Time of Maximum Forecast: 12/26/2025 at 05:00 PM PST
# Maximum Forecast Stage: 14.73 Feet
# Maximum Forecast Flow: 11639 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
12/19/2025 02 PM PST 13.90 9886 Normal
12/19/2025 03 PM PST 14.31 10735 + Normal
12/19/2025 04 PM PST 14.66 11486 + Normal
12/19/2025 05 PM PST 14.85 11903 + Normal
12/19/2025 06 PM PST 14.92 12059 + Normal
12/19/2025 07 PM PST 14.82 11837 - Normal
12/19/2025 08 PM PST 14.52 11183 - Normal
12/19/2025 09 PM PST 14.22 10546 - Normal
12/19/2025 10 PM PST 13.82 9724 - Normal
12/19/2025 11 PM PST 13.40 8867 - Normal
12/20/2025 12 AM PST 13.06 8133 - Normal
12/20/2025 01 AM PST 12.77 7531 - Normal
12/20/2025 02 AM PST 12.49 6969 - Normal
12/20/2025 03 AM PST 12.26 6523 - Normal
12/20/2025 04 AM PST 11.99 6017 - Normal
12/20/2025 05 AM PST 11.78 5636 - Normal
12/20/2025 06 AM PST 11.57 5266 - Normal
12/20/2025 07 AM PST 11.40 4976 - Normal
12/20/2025 08 AM PST 11.22 4676 - Normal
12/20/2025 09 AM PST 11.08 4449 - Normal
12/20/2025 10 AM PST 10.93 4212 - Normal
12/20/2025 11 AM PST 10.86 4103 - Normal
12/20/2025 12 PM PST 10.75 3935 - Normal
12/20/2025 01 PM PST 10.67 3815 - Normal
12/20/2025 02 PM PST 10.64 3770 - Normal
12/20/2025 03 PM PST 10.59 3696 - Normal
12/20/2025 04 PM PST 10.56 3652 - Normal
12/20/2025 05 PM PST 10.51 3579 - Normal
12/20/2025 06 PM PST 10.48 3536 - Normal
12/20/2025 07 PM PST 10.45 3493 - Normal
12/20/2025 08 PM PST 10.43 3464 - Normal
12/20/2025 09 PM PST 10.39 3407 - Normal
12/20/2025 10 PM PST 10.37 3379 - Normal
12/20/2025 11 PM PST 10.36 3365 - Normal
12/21/2025 12 AM PST 10.35 3351 - Normal
12/21/2025 01 AM PST 10.36 3365 + Normal
12/21/2025 02 AM PST 10.37 3379 + Normal
12/21/2025 03 AM PST 10.41 3436 + Normal
12/21/2025 04 AM PST 10.53 3608 + Normal
12/21/2025 05 AM PST 10.74 3920 + Normal
12/21/2025 06 AM PST 11.26 4742 + Normal
12/21/2025 07 AM PST 12.23 6466 + Normal
12/21/2025 08 AM PST 13.66 9403 + Normal
12/21/2025 09 AM PST 15.40 13149 + Action/Monitor
12/21/2025 10 AM PST 17.24 17729 + Action/Monitor
12/21/2025 11 AM PST 19.24 23410 + Action/Monitor
12/21/2025 12 PM PST 21.03 29104 + Action/Monitor
12/21/2025 01 PM PST 22.44 33986 + Minor Flood
12/21/2025 02 PM PST 23.83 39138 + Minor Flood
12/21/2025 03 PM PST 24.58 42056 + Moderate Flood
12/21/2025 04 PM PST 24.70 42532 + Moderate Flood
12/21/2025 05 PM PST 24.58 42056 - Moderate Flood
12/21/2025 06 PM PST 24.11 40216 - Moderate Flood
12/21/2025 07 PM PST 23.65 38452 - Minor Flood
12/21/2025 08 PM PST 23.06 36243 - Minor Flood
12/21/2025 09 PM PST 22.65 34743 - Minor Flood
12/21/2025 10 PM PST 22.00 32425 - Minor Flood
12/21/2025 11 PM PST 21.56 30898 - Action/Monitor
12/22/2025 12 AM PST 21.18 29607 - Action/Monitor
12/22/2025 01 AM PST 20.99 28970 - Action/Monitor
12/22/2025 02 AM PST 20.58 27619 - Action/Monitor
12/22/2025 03 AM PST 20.38 26971 - Action/Monitor
12/22/2025 04 AM PST 20.22 26457 - Action/Monitor
12/22/2025 05 AM PST 20.03 25853 - Action/Monitor
12/22/2025 06 AM PST 19.74 24943 - Action/Monitor
12/22/2025 07 AM PST 19.48 24141 - Action/Monitor
12/22/2025 08 AM PST 19.30 23592 - Action/Monitor
12/22/2025 09 AM PST 19.26 23471 - Action/Monitor
12/22/2025 10 AM PST 19.00 22690 - Action/Monitor
12/22/2025 11 AM PST 18.52 21282 - Action/Monitor
12/22/2025 12 PM PST 18.24 20479 - Action/Monitor
12/22/2025 01 PM PST 17.97 19719 - Action/Monitor
12/22/2025 02 PM PST 17.70 18971 - Action/Monitor
12/22/2025 03 PM PST 17.66 18862 - Action/Monitor
12/22/2025 04 PM PST 17.25 17756 - Action/Monitor
12/22/2025 05 PM PST 16.86 16732 - Action/Monitor
12/22/2025 06 PM PST 16.75 16448 - Action/Monitor
12/22/2025 07 PM PST 16.52 15862 - Action/Monitor
12/22/2025 08 PM PST 16.17 14989 - Action/Monitor
12/22/2025 09 PM PST 16.11 14842 - Action/Monitor
12/22/2025 10 PM PST 15.90 14332 - Action/Monitor
12/22/2025 11 PM PST 15.66 13758 - Action/Monitor
12/23/2025 12 AM PST 15.50 13382 - Action/Monitor
12/23/2025 01 AM PST 15.27 12850 - Action/Monitor
12/23/2025 02 AM PST 15.08 12417 - Action/Monitor
12/23/2025 03 AM PST 14.89 11992 - Normal
12/23/2025 04 AM PST 14.71 11595 - Normal
12/23/2025 05 AM PST 14.53 11204 - Normal
12/23/2025 06 AM PST 14.40 10926 - Normal
12/23/2025 07 AM PST 14.26 10630 - Normal
12/23/2025 08 AM PST 14.16 10421 - Normal
12/23/2025 09 AM PST 14.02 10131 - Normal
12/23/2025 10 AM PST 13.91 9906 - Normal
12/23/2025 11 AM PST 13.87 9825 - Normal
12/23/2025 12 PM PST 13.82 9724 - Normal
12/23/2025 01 PM PST 13.78 9643 - Normal
12/23/2025 02 PM PST 13.71 9503 - Normal
12/23/2025 03 PM PST 13.67 9423 - Normal
12/23/2025 04 PM PST 13.67 9423 0 Normal
12/23/2025 05 PM PST 13.69 9463 + Normal
12/23/2025 06 PM PST 13.74 9563 + Normal
12/23/2025 07 PM PST 13.81 9704 + Normal
12/23/2025 08 PM PST 13.83 9744 + Normal
12/23/2025 09 PM PST 13.84 9764 + Normal
12/23/2025 10 PM PST 13.84 9764 0 Normal
12/23/2025 11 PM PST 13.83 9744 - Normal
12/24/2025 12 AM PST 13.75 9583 - Normal
12/24/2025 01 AM PST 13.71 9503 - Normal
12/24/2025 02 AM PST 13.67 9423 - Normal
12/24/2025 03 AM PST 13.66 9403 - Normal
12/24/2025 04 AM PST 13.63 9344 - Normal
12/24/2025 05 AM PST 13.71 9503 + Normal
12/24/2025 06 AM PST 13.83 9744 + Normal
12/24/2025 07 AM PST 13.94 9967 + Normal
12/24/2025 08 AM PST 14.25 10609 + Normal
12/24/2025 09 AM PST 14.60 11356 + Normal
12/24/2025 10 AM PST 14.69 11551 + Normal
12/24/2025 11 AM PST 14.58 11312 - Normal
12/24/2025 12 PM PST 14.60 11356 + Normal
12/24/2025 01 PM PST 14.49 11118 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
12/24/2025 02 PM PST 14.41 10947 Normal
12/24/2025 03 PM PST 14.36 10841 - Normal
12/24/2025 04 PM PST 14.33 10778 - Normal
12/24/2025 05 PM PST 14.31 10735 - Normal
12/24/2025 06 PM PST 14.24 10588 - Normal
12/24/2025 07 PM PST 14.10 10296 - Normal
12/24/2025 08 PM PST 14.02 10131 - Normal
12/24/2025 09 PM PST 13.97 10029 - Normal
12/24/2025 10 PM PST 13.96 10008 - Normal
12/24/2025 11 PM PST 13.98 10049 + Normal
12/25/2025 12 AM PST 13.87 9825 - Normal
12/25/2025 01 AM PST 13.76 9603 - Normal
12/25/2025 02 AM PST 13.70 9483 - Normal
12/25/2025 03 AM PST 13.63 9344 - Normal
12/25/2025 04 AM PST 13.59 9265 - Normal
12/25/2025 05 AM PST 13.58 9245 - Normal
12/25/2025 06 AM PST 13.62 9324 + Normal
12/25/2025 07 AM PST 13.73 9543 + Normal
12/25/2025 08 AM PST 13.87 9825 + Normal
12/25/2025 09 AM PST 13.95 9988 + Normal
12/25/2025 10 AM PST 14.01 10111 + Normal
12/25/2025 11 AM PST 14.07 10234 + Normal
12/25/2025 12 PM PST 14.15 10400 + Normal
12/25/2025 01 PM PST 14.26 10630 + Normal
12/25/2025 02 PM PST 14.33 10778 + Normal
12/25/2025 03 PM PST 14.39 10905 + Normal
12/25/2025 04 PM PST 14.42 10969 + Normal
12/25/2025 05 PM PST 14.45 11033 + Normal
12/25/2025 06 PM PST 14.46 11054 + Normal
12/25/2025 07 PM PST 14.46 11054 0 Normal
12/25/2025 08 PM PST 14.46 11054 0 Normal
12/25/2025 09 PM PST 14.46 11054 0 Normal
12/25/2025 10 PM PST 14.46 11054 0 Normal
12/25/2025 11 PM PST 14.46 11054 0 Normal
12/26/2025 12 AM PST 14.46 11054 0 Normal
12/26/2025 01 AM PST 14.46 11054 0 Normal
12/26/2025 02 AM PST 14.46 11054 0 Normal
12/26/2025 03 AM PST 14.46 11054 0 Normal
12/26/2025 04 AM PST 14.45 11033 - Normal
12/26/2025 05 AM PST 14.44 11011 - Normal
12/26/2025 06 AM PST 14.41 10947 - Normal
12/26/2025 07 AM PST 14.36 10841 - Normal
12/26/2025 08 AM PST 14.32 10756 - Normal
12/26/2025 09 AM PST 14.31 10735 - Normal
12/26/2025 10 AM PST 14.32 10756 + Normal
12/26/2025 11 AM PST 14.36 10841 + Normal
12/26/2025 12 PM PST 14.43 10990 + Normal
12/26/2025 01 PM PST 14.53 11204 + Normal
12/26/2025 02 PM PST 14.61 11377 + Normal
12/26/2025 03 PM PST 14.68 11530 + Normal
12/26/2025 04 PM PST 14.71 11595 + Normal
12/26/2025 05 PM PST 14.73 11639 + Normal
12/26/2025 06 PM PST 14.71 11595 - Normal
12/26/2025 07 PM PST 14.67 11508 - Normal
12/26/2025 08 PM PST 14.63 11421 - Normal
12/26/2025 09 PM PST 14.59 11334 - Normal
12/26/2025 10 PM PST 14.56 11269 - Normal
12/26/2025 11 PM PST 14.51 11161 - Normal
12/27/2025 12 AM PST 14.43 10990 - Normal
12/27/2025 01 AM PST 14.30 10714 - Normal
12/27/2025 02 AM PST 14.19 10483 - Normal
12/27/2025 03 AM PST 14.11 10317 - Normal
12/27/2025 04 AM PST 14.03 10152 - Normal
12/27/2025 05 AM PST 13.96 10008 - Normal
12/27/2025 06 AM PST 13.86 9805 - Normal
12/27/2025 07 AM PST 13.76 9603 - Normal
12/27/2025 08 AM PST 13.65 9384 - Normal
12/27/2025 09 AM PST 13.55 9186 - Normal
12/27/2025 10 AM PST 13.47 9021 - Normal
12/27/2025 11 AM PST 13.41 8889 - Normal
12/27/2025 12 PM PST 13.33 8713 - Normal
12/27/2025 01 PM PST 13.24 8518 - Normal
12/27/2025 02 PM PST 13.14 8303 - Normal
12/27/2025 03 PM PST 13.06 8133 - Normal
12/27/2025 04 PM PST 12.99 7986 - Normal
12/27/2025 05 PM PST 12.96 7923 - Normal
12/27/2025 06 PM PST 12.91 7819 - Normal
12/27/2025 07 PM PST 12.85 7695 - Normal
12/27/2025 08 PM PST 12.79 7572 - Normal
12/27/2025 09 PM PST 12.72 7429 - Normal
12/27/2025 10 PM PST 12.66 7308 - Normal
12/27/2025 11 PM PST 12.61 7207 - Normal
12/28/2025 12 AM PST 12.56 7108 - Normal
12/28/2025 01 AM PST 12.51 7009 - Normal
12/28/2025 02 AM PST 12.45 6891 - Normal
12/28/2025 03 AM PST 12.40 6793 - Normal
12/28/2025 04 AM PST 12.35 6696 - Normal
12/28/2025 05 AM PST 12.30 6600 - Normal
12/28/2025 06 AM PST 12.26 6523 - Normal
12/28/2025 07 AM PST 12.22 6447 - Normal
12/28/2025 08 AM PST 12.18 6371 - Normal
12/28/2025 09 AM PST 12.13 6277 - Normal
12/28/2025 10 AM PST 12.09 6202 - Normal
12/28/2025 11 AM PST 12.04 6109 - Normal
12/28/2025 12 PM PST 12.00 6035 - Normal
12/28/2025 01 PM PST 11.97 5980 - Normal
12/28/2025 02 PM PST 11.93 5907 - Normal
12/28/2025 03 PM PST 11.89 5834 - Normal
12/28/2025 04 PM PST 11.85 5761 - Normal
12/28/2025 05 PM PST 11.81 5689 - Normal
12/28/2025 06 PM PST 11.78 5636 - Normal
12/28/2025 07 PM PST 11.74 5564 - Normal
12/28/2025 08 PM PST 11.70 5494 - Normal
12/28/2025 09 PM PST 11.66 5423 - Normal
12/28/2025 10 PM PST 11.62 5353 - Normal
12/28/2025 11 PM PST 11.58 5284 - Normal
12/29/2025 12 AM PST 11.54 5214 - Normal
12/29/2025 01 AM PST 11.51 5163 - Normal
12/29/2025 02 AM PST 11.47 5094 - Normal
12/29/2025 03 AM PST 11.43 5026 - Normal
12/29/2025 04 AM PST 11.39 4959 - 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.
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