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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: | Apr 30 2025 at 8:07 AM PDT | Next Issuance: | May 01 2025 at 9:00 AM PDT
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| 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: 04/30/2025 at 08:07 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/26/2025 at 09:00 PM PDT
# Maximum Observed Stage: 7.22 Feet
# Maximum Observed Flow: 560 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/30/2025 at 09:00 AM PDT
# Maximum Forecast Stage: 6.95 Feet
# Maximum Forecast Flow: 437 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/25/2025 08 AM PDT 7.19 545 Normal
04/25/2025 09 AM PDT 7.18 541 - Normal
04/25/2025 10 AM PDT 7.19 545 + Normal
04/25/2025 11 AM PDT 7.18 541 - Normal
04/25/2025 12 PM PDT 7.18 541 0 Normal
04/25/2025 01 PM PDT 7.17 536 - Normal
04/25/2025 02 PM PDT 7.17 536 0 Normal
04/25/2025 03 PM PDT 7.17 536 0 Normal
04/25/2025 04 PM PDT 7.18 541 + Normal
04/25/2025 05 PM PDT 7.19 545 + Normal
04/25/2025 06 PM PDT 7.19 545 0 Normal
04/25/2025 07 PM PDT 7.19 545 0 Normal
04/25/2025 08 PM PDT 7.19 545 0 Normal
04/25/2025 09 PM PDT 7.19 545 0 Normal
04/25/2025 10 PM PDT 7.18 541 - Normal
04/25/2025 11 PM PDT 7.18 541 0 Normal
04/26/2025 12 AM PDT 7.16 531 - Normal
04/26/2025 01 AM PDT 7.15 526 - Normal
04/26/2025 02 AM PDT 7.15 526 0 Normal
04/26/2025 03 AM PDT 7.15 526 0 Normal
04/26/2025 04 AM PDT 7.16 531 + Normal
04/26/2025 05 AM PDT 7.17 536 + Normal
04/26/2025 06 AM PDT 7.19 545 + Normal
04/26/2025 07 AM PDT 7.19 545 0 Normal
04/26/2025 08 AM PDT 7.19 545 0 Normal
04/26/2025 09 AM PDT 7.18 541 - Normal
04/26/2025 10 AM PDT 7.18 541 0 Normal
04/26/2025 11 AM PDT 7.18 541 0 Normal
04/26/2025 12 PM PDT 7.18 541 0 Normal
04/26/2025 01 PM PDT 7.18 541 0 Normal
04/26/2025 02 PM PDT 7.19 545 + Normal
04/26/2025 03 PM PDT 7.19 545 0 Normal
04/26/2025 04 PM PDT 7.18 541 - Normal
04/26/2025 05 PM PDT 7.21 555 + Normal
04/26/2025 06 PM PDT 7.21 555 0 Normal
04/26/2025 07 PM PDT 7.21 555 0 Normal
04/26/2025 08 PM PDT 7.21 555 0 Normal
04/26/2025 09 PM PDT 7.22 560 + Normal
04/26/2025 10 PM PDT 7.21 555 - Normal
04/26/2025 11 PM PDT 7.20 550 - Normal
04/27/2025 12 AM PDT 7.19 545 - Normal
04/27/2025 01 AM PDT 7.19 545 0 Normal
04/27/2025 02 AM PDT 7.19 545 0 Normal
04/27/2025 03 AM PDT 7.19 545 0 Normal
04/27/2025 04 AM PDT 7.18 541 - Normal
04/27/2025 05 AM PDT 7.19 545 + Normal
04/27/2025 06 AM PDT 7.19 545 0 Normal
04/27/2025 07 AM PDT 7.19 545 0 Normal
04/27/2025 08 AM PDT 7.19 545 0 Normal
04/27/2025 09 AM PDT 7.18 541 - Normal
04/27/2025 10 AM PDT 7.18 541 0 Normal
04/27/2025 11 AM PDT 7.18 541 0 Normal
04/27/2025 12 PM PDT 7.18 541 0 Normal
04/27/2025 01 PM PDT 7.17 536 - Normal
04/27/2025 02 PM PDT 7.17 536 0 Normal
04/27/2025 03 PM PDT 7.17 536 0 Normal
04/27/2025 04 PM PDT 7.17 536 0 Normal
04/27/2025 05 PM PDT 7.18 541 + Normal
04/27/2025 06 PM PDT 7.18 541 0 Normal
04/27/2025 07 PM PDT 7.18 541 0 Normal
04/27/2025 08 PM PDT 7.18 541 0 Normal
04/27/2025 09 PM PDT 7.17 536 - Normal
04/27/2025 10 PM PDT 7.17 536 0 Normal
04/27/2025 11 PM PDT 7.14 522 - Normal
04/28/2025 12 AM PDT 7.14 522 0 Normal
04/28/2025 01 AM PDT 7.12 512 - Normal
04/28/2025 02 AM PDT 7.12 512 0 Normal
04/28/2025 03 AM PDT 7.11 508 - Normal
04/28/2025 04 AM PDT 7.11 508 0 Normal
04/28/2025 05 AM PDT 7.11 508 0 Normal
04/28/2025 06 AM PDT 7.11 508 0 Normal
04/28/2025 07 AM PDT 7.11 508 0 Normal
04/28/2025 08 AM PDT 7.10 503 - Normal
04/28/2025 09 AM PDT 7.10 503 0 Normal
04/28/2025 10 AM PDT 7.10 503 0 Normal
04/28/2025 11 AM PDT 7.09 499 - Normal
04/28/2025 12 PM PDT 7.07 490 - Normal
04/28/2025 01 PM PDT 7.08 494 + Normal
04/28/2025 02 PM PDT 7.07 490 - Normal
04/28/2025 03 PM PDT 7.07 490 0 Normal
04/28/2025 04 PM PDT 7.07 490 0 Normal
04/28/2025 05 PM PDT 7.09 499 + Normal
04/28/2025 06 PM PDT 7.08 494 - Normal
04/28/2025 07 PM PDT 7.07 490 - Normal
04/28/2025 08 PM PDT 7.07 490 0 Normal
04/28/2025 09 PM PDT 7.07 490 0 Normal
04/28/2025 10 PM PDT 7.07 490 0 Normal
04/28/2025 11 PM PDT 7.04 476 - Normal
04/29/2025 12 AM PDT 7.03 472 - Normal
04/29/2025 01 AM PDT 7.02 467 - Normal
04/29/2025 02 AM PDT 7.02 467 0 Normal
04/29/2025 03 AM PDT 7.01 463 - Normal
04/29/2025 04 AM PDT 7.02 467 + Normal
04/29/2025 05 AM PDT 7.02 467 0 Normal
04/29/2025 06 AM PDT 7.02 467 0 Normal
04/29/2025 07 AM PDT 7.02 467 0 Normal
04/29/2025 08 AM PDT 7.02 467 0 Normal
04/29/2025 09 AM PDT 7.02 467 0 Normal
04/29/2025 10 AM PDT 7.01 463 - Normal
04/29/2025 11 AM PDT 7.00 459 - Normal
04/29/2025 12 PM PDT 7.00 459 0 Normal
04/29/2025 01 PM PDT 7.00 459 0 Normal
04/29/2025 02 PM PDT 7.00 459 0 Normal
04/29/2025 03 PM PDT 7.00 459 0 Normal
04/29/2025 04 PM PDT 7.00 459 0 Normal
04/29/2025 05 PM PDT 7.00 459 0 Normal
04/29/2025 06 PM PDT 7.00 459 0 Normal
04/29/2025 07 PM PDT 7.00 459 0 Normal
04/29/2025 08 PM PDT 7.00 459 0 Normal
04/29/2025 09 PM PDT 6.99 454 - Normal
04/29/2025 10 PM PDT 6.99 454 0 Normal
04/29/2025 11 PM PDT 6.97 446 - Normal
04/30/2025 12 AM PDT 6.96 441 - Normal
04/30/2025 01 AM PDT 6.95 437 - Normal
04/30/2025 02 AM PDT 6.95 437 0 Normal
04/30/2025 03 AM PDT 6.94 433 - Normal
04/30/2025 04 AM PDT 6.94 433 0 Normal
04/30/2025 05 AM PDT 6.94 433 0 Normal
04/30/2025 06 AM PDT 6.94 433 0 Normal
04/30/2025 07 AM PDT 6.94 433 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/30/2025 08 AM PDT 6.94 433 Normal
04/30/2025 09 AM PDT 6.95 437 + Normal
04/30/2025 10 AM PDT 6.95 437 0 Normal
04/30/2025 11 AM PDT 6.95 437 0 Normal
04/30/2025 12 PM PDT 6.95 437 0 Normal
04/30/2025 01 PM PDT 6.95 437 0 Normal
04/30/2025 02 PM PDT 6.95 437 0 Normal
04/30/2025 03 PM PDT 6.95 437 0 Normal
04/30/2025 04 PM PDT 6.95 437 0 Normal
04/30/2025 05 PM PDT 6.95 437 0 Normal
04/30/2025 06 PM PDT 6.95 437 0 Normal
04/30/2025 07 PM PDT 6.95 437 0 Normal
04/30/2025 08 PM PDT 6.94 433 - Normal
04/30/2025 09 PM PDT 6.94 433 0 Normal
04/30/2025 10 PM PDT 6.94 433 0 Normal
04/30/2025 11 PM PDT 6.94 433 0 Normal
05/01/2025 12 AM PDT 6.94 433 0 Normal
05/01/2025 01 AM PDT 6.94 433 0 Normal
05/01/2025 02 AM PDT 6.93 429 - Normal
05/01/2025 03 AM PDT 6.93 429 0 Normal
05/01/2025 04 AM PDT 6.93 429 0 Normal
05/01/2025 05 AM PDT 6.93 429 0 Normal
05/01/2025 06 AM PDT 6.92 425 - Normal
05/01/2025 07 AM PDT 6.92 425 0 Normal
05/01/2025 08 AM PDT 6.92 425 0 Normal
05/01/2025 09 AM PDT 6.92 425 0 Normal
05/01/2025 10 AM PDT 6.92 425 0 Normal
05/01/2025 11 AM PDT 6.91 420 - Normal
05/01/2025 12 PM PDT 6.91 420 0 Normal
05/01/2025 01 PM PDT 6.91 420 0 Normal
05/01/2025 02 PM PDT 6.91 420 0 Normal
05/01/2025 03 PM PDT 6.91 420 0 Normal
05/01/2025 04 PM PDT 6.90 416 - Normal
05/01/2025 05 PM PDT 6.90 416 0 Normal
05/01/2025 06 PM PDT 6.90 416 0 Normal
05/01/2025 07 PM PDT 6.90 416 0 Normal
05/01/2025 08 PM PDT 6.90 416 0 Normal
05/01/2025 09 PM PDT 6.89 412 - Normal
05/01/2025 10 PM PDT 6.89 412 0 Normal
05/01/2025 11 PM PDT 6.89 412 0 Normal
05/02/2025 12 AM PDT 6.89 412 0 Normal
05/02/2025 01 AM PDT 6.89 412 0 Normal
05/02/2025 02 AM PDT 6.89 412 0 Normal
05/02/2025 03 AM PDT 6.88 408 - Normal
05/02/2025 04 AM PDT 6.88 408 0 Normal
05/02/2025 05 AM PDT 6.88 408 0 Normal
05/02/2025 06 AM PDT 6.88 408 0 Normal
05/02/2025 07 AM PDT 6.88 408 0 Normal
05/02/2025 08 AM PDT 6.88 408 0 Normal
05/02/2025 09 AM PDT 6.88 408 0 Normal
05/02/2025 10 AM PDT 6.87 404 - Normal
05/02/2025 11 AM PDT 6.87 404 0 Normal
05/02/2025 12 PM PDT 6.87 404 0 Normal
05/02/2025 01 PM PDT 6.87 404 0 Normal
05/02/2025 02 PM PDT 6.87 404 0 Normal
05/02/2025 03 PM PDT 6.87 404 0 Normal
05/02/2025 04 PM PDT 6.87 404 0 Normal
05/02/2025 05 PM PDT 6.87 404 0 Normal
05/02/2025 06 PM PDT 6.87 404 0 Normal
05/02/2025 07 PM PDT 6.87 404 0 Normal
05/02/2025 08 PM PDT 6.87 404 0 Normal
05/02/2025 09 PM PDT 6.87 404 0 Normal
05/02/2025 10 PM PDT 6.87 404 0 Normal
05/02/2025 11 PM PDT 6.87 404 0 Normal
05/03/2025 12 AM PDT 6.87 404 0 Normal
05/03/2025 01 AM PDT 6.87 404 0 Normal
05/03/2025 02 AM PDT 6.87 404 0 Normal
05/03/2025 03 AM PDT 6.86 400 - Normal
05/03/2025 04 AM PDT 6.86 400 0 Normal
05/03/2025 05 AM PDT 6.86 400 0 Normal
05/03/2025 06 AM PDT 6.86 400 0 Normal
05/03/2025 07 AM PDT 6.86 400 0 Normal
05/03/2025 08 AM PDT 6.86 400 0 Normal
05/03/2025 09 AM PDT 6.86 400 0 Normal
05/03/2025 10 AM PDT 6.85 396 - Normal
05/03/2025 11 AM PDT 6.85 396 0 Normal
05/03/2025 12 PM PDT 6.85 396 0 Normal
05/03/2025 01 PM PDT 6.85 396 0 Normal
05/03/2025 02 PM PDT 6.85 396 0 Normal
05/03/2025 03 PM PDT 6.85 396 0 Normal
05/03/2025 04 PM PDT 6.85 396 0 Normal
05/03/2025 05 PM PDT 6.85 396 0 Normal
05/03/2025 06 PM PDT 6.85 396 0 Normal
05/03/2025 07 PM PDT 6.85 396 0 Normal
05/03/2025 08 PM PDT 6.85 396 0 Normal
05/03/2025 09 PM PDT 6.84 391 - Normal
05/03/2025 10 PM PDT 6.84 391 0 Normal
05/03/2025 11 PM PDT 6.84 391 0 Normal
05/04/2025 12 AM PDT 6.84 391 0 Normal
05/04/2025 01 AM PDT 6.84 391 0 Normal
05/04/2025 02 AM PDT 6.84 391 0 Normal
05/04/2025 03 AM PDT 6.84 391 0 Normal
05/04/2025 04 AM PDT 6.83 387 - Normal
05/04/2025 05 AM PDT 6.83 387 0 Normal
05/04/2025 06 AM PDT 6.83 387 0 Normal
05/04/2025 07 AM PDT 6.83 387 0 Normal
05/04/2025 08 AM PDT 6.83 387 0 Normal
05/04/2025 09 AM PDT 6.83 387 0 Normal
05/04/2025 10 AM PDT 6.83 387 0 Normal
05/04/2025 11 AM PDT 6.82 382 - Normal
05/04/2025 12 PM PDT 6.82 382 0 Normal
05/04/2025 01 PM PDT 6.82 382 0 Normal
05/04/2025 02 PM PDT 6.82 382 0 Normal
05/04/2025 03 PM PDT 6.82 382 0 Normal
05/04/2025 04 PM PDT 6.82 382 0 Normal
05/04/2025 05 PM PDT 6.82 382 0 Normal
05/04/2025 06 PM PDT 6.82 382 0 Normal
05/04/2025 07 PM PDT 6.82 382 0 Normal
05/04/2025 08 PM PDT 6.82 382 0 Normal
05/04/2025 09 PM PDT 6.82 382 0 Normal
05/04/2025 10 PM PDT 6.82 382 0 Normal
05/04/2025 11 PM PDT 6.82 382 0 Normal
05/05/2025 12 AM PDT 6.82 382 0 Normal
05/05/2025 01 AM PDT 6.82 382 0 Normal
05/05/2025 02 AM PDT 6.82 382 0 Normal
05/05/2025 03 AM PDT 6.82 382 0 Normal
05/05/2025 04 AM PDT 6.82 382 0 Normal
05/05/2025 05 AM PDT 6.82 382 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.
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