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RUSSIAN RIVER - HACIENDA BRIDGE (RIOC1)
| Latitude: 38.51º N | Longitude: 122.93º W | Elevation: 20 Feet | | Forecast Type: Unofficial Location |
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | May 05 2026 at 7:15 AM PDT | Next Issuance: | May 06 2026 at 9:00 AM PDT
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| Action/Monitor: 31.0 Feet | Minor Flood: 34.0 Feet | Moderate Flood: N/A | Major Flood: N/A |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Russian River - Hacienda Bridge (RIOC1)
#
# File Generation Time: 05/05/2026 at 07:16 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/30/2026 at 08:00 AM PDT
# Maximum Observed Stage: 3.71 Feet
# Maximum Observed Flow: 579 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/05/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 3.31 Feet
# Maximum Forecast Flow: 488 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/30/2026 07 AM PDT 3.71 579 Normal
04/30/2026 08 AM PDT 3.71 579 0 Normal
04/30/2026 09 AM PDT 3.70 577 - Normal
04/30/2026 10 AM PDT 3.69 575 - Normal
04/30/2026 11 AM PDT 3.69 575 0 Normal
04/30/2026 12 PM PDT 3.69 575 0 Normal
04/30/2026 01 PM PDT 3.68 572 - Normal
04/30/2026 02 PM PDT 3.68 572 0 Normal
04/30/2026 03 PM PDT 3.68 572 0 Normal
04/30/2026 04 PM PDT 3.67 570 - Normal
04/30/2026 05 PM PDT 3.66 568 - Normal
04/30/2026 06 PM PDT 3.66 568 0 Normal
04/30/2026 07 PM PDT 3.66 568 0 Normal
04/30/2026 08 PM PDT 3.64 563 - Normal
04/30/2026 09 PM PDT 3.63 561 - Normal
04/30/2026 10 PM PDT 3.63 561 0 Normal
04/30/2026 11 PM PDT 3.61 556 - Normal
05/01/2026 12 AM PDT 3.61 556 0 Normal
05/01/2026 01 AM PDT 3.60 554 - Normal
05/01/2026 02 AM PDT 3.60 554 0 Normal
05/01/2026 03 AM PDT 3.58 549 - Normal
05/01/2026 04 AM PDT 3.58 549 0 Normal
05/01/2026 05 AM PDT 3.58 549 0 Normal
05/01/2026 06 AM PDT 3.57 547 - Normal
05/01/2026 07 AM PDT 3.56 545 - Normal
05/01/2026 08 AM PDT 3.56 545 0 Normal
05/01/2026 09 AM PDT 3.56 545 0 Normal
05/01/2026 10 AM PDT 3.55 542 - Normal
05/01/2026 11 AM PDT 3.55 542 0 Normal
05/01/2026 12 PM PDT 3.54 540 - Normal
05/01/2026 01 PM PDT 3.54 540 0 Normal
05/01/2026 02 PM PDT 3.53 538 - Normal
05/01/2026 03 PM PDT 3.53 538 0 Normal
05/01/2026 04 PM PDT 3.53 538 0 Normal
05/01/2026 05 PM PDT 3.52 536 - Normal
05/01/2026 06 PM PDT 3.52 536 0 Normal
05/01/2026 07 PM PDT 3.52 536 0 Normal
05/01/2026 08 PM PDT 3.51 533 - Normal
05/01/2026 09 PM PDT 3.50 531 - Normal
05/01/2026 10 PM PDT 3.50 531 0 Normal
05/01/2026 11 PM PDT 3.49 529 - Normal
05/02/2026 12 AM PDT 3.48 527 - Normal
05/02/2026 01 AM PDT 3.48 527 0 Normal
05/02/2026 02 AM PDT 3.47 524 - Normal
05/02/2026 03 AM PDT 3.46 522 - Normal
05/02/2026 04 AM PDT 3.46 522 0 Normal
05/02/2026 05 AM PDT 3.45 520 - Normal
05/02/2026 06 AM PDT 3.45 520 0 Normal
05/02/2026 07 AM PDT 3.45 520 0 Normal
05/02/2026 08 AM PDT 3.45 520 0 Normal
05/02/2026 09 AM PDT 3.44 518 - Normal
05/02/2026 10 AM PDT 3.44 518 0 Normal
05/02/2026 11 AM PDT 3.44 518 0 Normal
05/02/2026 12 PM PDT 3.44 518 0 Normal
05/02/2026 01 PM PDT 3.44 518 0 Normal
05/02/2026 02 PM PDT 3.42 513 - Normal
05/02/2026 03 PM PDT 3.42 513 0 Normal
05/02/2026 04 PM PDT 3.42 513 0 Normal
05/02/2026 05 PM PDT 3.42 513 0 Normal
05/02/2026 06 PM PDT 3.41 511 - Normal
05/02/2026 07 PM PDT 3.41 511 0 Normal
05/02/2026 08 PM PDT 3.41 511 0 Normal
05/02/2026 09 PM PDT 3.40 509 - Normal
05/02/2026 10 PM PDT 3.40 509 0 Normal
05/02/2026 11 PM PDT 3.40 509 0 Normal
05/03/2026 12 AM PDT 3.39 507 - Normal
05/03/2026 01 AM PDT 3.39 507 0 Normal
05/03/2026 02 AM PDT 3.38 505 - Normal
05/03/2026 03 AM PDT 3.38 505 0 Normal
05/03/2026 04 AM PDT 3.38 505 0 Normal
05/03/2026 05 AM PDT 3.38 505 0 Normal
05/03/2026 06 AM PDT 3.37 502 - Normal
05/03/2026 07 AM PDT 3.37 502 0 Normal
05/03/2026 08 AM PDT 3.36 500 - Normal
05/03/2026 09 AM PDT 3.36 500 0 Normal
05/03/2026 10 AM PDT 3.36 500 0 Normal
05/03/2026 11 AM PDT 3.35 498 - Normal
05/03/2026 12 PM PDT 3.36 500 + Normal
05/03/2026 01 PM PDT 3.35 498 - Normal
05/03/2026 02 PM PDT 3.35 498 0 Normal
05/03/2026 03 PM PDT 3.35 498 0 Normal
05/03/2026 04 PM PDT 3.35 498 0 Normal
05/03/2026 05 PM PDT 3.33 493 - Normal
05/03/2026 06 PM PDT 3.33 493 0 Normal
05/03/2026 07 PM PDT 3.33 493 0 Normal
05/03/2026 08 PM PDT 3.33 493 0 Normal
05/03/2026 09 PM PDT 3.32 491 - Normal
05/03/2026 10 PM PDT 3.32 491 0 Normal
05/03/2026 11 PM PDT 3.31 488 - Normal
05/04/2026 12 AM PDT 3.30 486 - Normal
05/04/2026 01 AM PDT 3.31 488 + Normal
05/04/2026 02 AM PDT 3.30 486 - Normal
05/04/2026 03 AM PDT 3.29 483 - Normal
05/04/2026 04 AM PDT 3.29 483 0 Normal
05/04/2026 05 AM PDT 3.28 481 - Normal
05/04/2026 06 AM PDT 3.28 481 0 Normal
05/04/2026 07 AM PDT 3.27 478 - Normal
05/04/2026 08 AM PDT 3.27 478 0 Normal
05/04/2026 09 AM PDT 3.27 478 0 Normal
05/04/2026 10 AM PDT 3.27 478 0 Normal
05/04/2026 11 AM PDT 3.27 478 0 Normal
05/04/2026 12 PM PDT 3.26 476 - Normal
05/04/2026 01 PM PDT 3.26 476 0 Normal
05/04/2026 02 PM PDT 3.25 474 - Normal
05/04/2026 03 PM PDT 3.25 474 0 Normal
05/04/2026 04 PM PDT 3.26 476 + Normal
05/04/2026 05 PM PDT 3.26 476 0 Normal
05/04/2026 06 PM PDT 3.26 476 0 Normal
05/04/2026 07 PM PDT 3.26 476 0 Normal
05/04/2026 08 PM PDT 3.27 478 + Normal
05/04/2026 09 PM PDT 3.27 478 0 Normal
05/04/2026 10 PM PDT 3.26 476 - Normal
05/04/2026 11 PM PDT 3.26 476 0 Normal
05/05/2026 12 AM PDT 3.27 478 + Normal
05/05/2026 01 AM PDT 3.28 481 + Normal
05/05/2026 02 AM PDT 3.27 478 - Normal
05/05/2026 03 AM PDT 3.27 478 0 Normal
05/05/2026 04 AM PDT 3.27 478 0 Normal
05/05/2026 05 AM PDT 3.28 481 + Normal
05/05/2026 06 AM PDT 3.29 483 + Normal
05/05/2026 07 AM PDT 3.29 483 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/05/2026 08 AM PDT 3.30 486 Normal
05/05/2026 09 AM PDT 3.31 488 + Normal
05/05/2026 10 AM PDT 3.31 488 0 Normal
05/05/2026 11 AM PDT 3.31 488 0 Normal
05/05/2026 12 PM PDT 3.31 488 0 Normal
05/05/2026 01 PM PDT 3.31 488 0 Normal
05/05/2026 02 PM PDT 3.31 488 0 Normal
05/05/2026 03 PM PDT 3.31 488 0 Normal
05/05/2026 04 PM PDT 3.30 486 - Normal
05/05/2026 05 PM PDT 3.30 486 0 Normal
05/05/2026 06 PM PDT 3.28 481 - Normal
05/05/2026 07 PM PDT 3.28 481 0 Normal
05/05/2026 08 PM PDT 3.27 478 - Normal
05/05/2026 09 PM PDT 3.26 476 - Normal
05/05/2026 10 PM PDT 3.25 474 - Normal
05/05/2026 11 PM PDT 3.24 471 - Normal
05/06/2026 12 AM PDT 3.23 469 - Normal
05/06/2026 01 AM PDT 3.22 466 - Normal
05/06/2026 02 AM PDT 3.21 464 - Normal
05/06/2026 03 AM PDT 3.20 461 - Normal
05/06/2026 04 AM PDT 3.19 459 - Normal
05/06/2026 05 AM PDT 3.19 459 0 Normal
05/06/2026 06 AM PDT 3.18 457 - Normal
05/06/2026 07 AM PDT 3.17 454 - Normal
05/06/2026 08 AM PDT 3.17 454 0 Normal
05/06/2026 09 AM PDT 3.16 452 - Normal
05/06/2026 10 AM PDT 3.15 450 - Normal
05/06/2026 11 AM PDT 3.15 450 0 Normal
05/06/2026 12 PM PDT 3.14 447 - Normal
05/06/2026 01 PM PDT 3.14 447 0 Normal
05/06/2026 02 PM PDT 3.13 445 - Normal
05/06/2026 03 PM PDT 3.13 445 0 Normal
05/06/2026 04 PM PDT 3.12 443 - Normal
05/06/2026 05 PM PDT 3.12 443 0 Normal
05/06/2026 06 PM PDT 3.11 440 - Normal
05/06/2026 07 PM PDT 3.10 438 - Normal
05/06/2026 08 PM PDT 3.10 438 0 Normal
05/06/2026 09 PM PDT 3.10 438 0 Normal
05/06/2026 10 PM PDT 3.09 436 - Normal
05/06/2026 11 PM PDT 3.09 436 0 Normal
05/07/2026 12 AM PDT 3.08 433 - Normal
05/07/2026 01 AM PDT 3.08 433 0 Normal
05/07/2026 02 AM PDT 3.08 433 0 Normal
05/07/2026 03 AM PDT 3.08 433 0 Normal
05/07/2026 04 AM PDT 3.07 431 - Normal
05/07/2026 05 AM PDT 3.07 431 0 Normal
05/07/2026 06 AM PDT 3.06 429 - Normal
05/07/2026 07 AM PDT 3.06 429 0 Normal
05/07/2026 08 AM PDT 3.06 429 0 Normal
05/07/2026 09 AM PDT 3.05 427 - Normal
05/07/2026 10 AM PDT 3.05 427 0 Normal
05/07/2026 11 AM PDT 3.05 427 0 Normal
05/07/2026 12 PM PDT 3.04 424 - Normal
05/07/2026 01 PM PDT 3.04 424 0 Normal
05/07/2026 02 PM PDT 3.04 424 0 Normal
05/07/2026 03 PM PDT 3.03 422 - Normal
05/07/2026 04 PM PDT 3.03 422 0 Normal
05/07/2026 05 PM PDT 3.03 422 0 Normal
05/07/2026 06 PM PDT 3.02 420 - Normal
05/07/2026 07 PM PDT 3.01 417 - Normal
05/07/2026 08 PM PDT 3.01 417 0 Normal
05/07/2026 09 PM PDT 3.01 417 0 Normal
05/07/2026 10 PM PDT 3.00 415 - Normal
05/07/2026 11 PM PDT 3.00 415 0 Normal
05/08/2026 12 AM PDT 3.00 415 0 Normal
05/08/2026 01 AM PDT 2.99 413 - Normal
05/08/2026 02 AM PDT 2.99 413 0 Normal
05/08/2026 03 AM PDT 2.99 413 0 Normal
05/08/2026 04 AM PDT 2.98 411 - Normal
05/08/2026 05 AM PDT 2.98 411 0 Normal
05/08/2026 06 AM PDT 2.98 411 0 Normal
05/08/2026 07 AM PDT 2.98 411 0 Normal
05/08/2026 08 AM PDT 2.97 409 - Normal
05/08/2026 09 AM PDT 2.97 409 0 Normal
05/08/2026 10 AM PDT 2.97 409 0 Normal
05/08/2026 11 AM PDT 2.96 406 - Normal
05/08/2026 12 PM PDT 2.96 406 0 Normal
05/08/2026 01 PM PDT 2.96 406 0 Normal
05/08/2026 02 PM PDT 2.96 406 0 Normal
05/08/2026 03 PM PDT 2.95 404 - Normal
05/08/2026 04 PM PDT 2.95 404 0 Normal
05/08/2026 05 PM PDT 2.95 404 0 Normal
05/08/2026 06 PM PDT 2.94 402 - Normal
05/08/2026 07 PM PDT 2.93 400 - Normal
05/08/2026 08 PM PDT 2.93 400 0 Normal
05/08/2026 09 PM PDT 2.93 400 0 Normal
05/08/2026 10 PM PDT 2.93 400 0 Normal
05/08/2026 11 PM PDT 2.92 398 - Normal
05/09/2026 12 AM PDT 2.92 398 0 Normal
05/09/2026 01 AM PDT 2.92 398 0 Normal
05/09/2026 02 AM PDT 2.92 398 0 Normal
05/09/2026 03 AM PDT 2.91 395 - Normal
05/09/2026 04 AM PDT 2.91 395 0 Normal
05/09/2026 05 AM PDT 2.91 395 0 Normal
05/09/2026 06 AM PDT 2.91 395 0 Normal
05/09/2026 07 AM PDT 2.90 393 - Normal
05/09/2026 08 AM PDT 2.90 393 0 Normal
05/09/2026 09 AM PDT 2.90 393 0 Normal
05/09/2026 10 AM PDT 2.90 393 0 Normal
05/09/2026 11 AM PDT 2.89 391 - Normal
05/09/2026 12 PM PDT 2.89 391 0 Normal
05/09/2026 01 PM PDT 2.89 391 0 Normal
05/09/2026 02 PM PDT 2.89 391 0 Normal
05/09/2026 03 PM PDT 2.88 389 - Normal
05/09/2026 04 PM PDT 2.88 389 0 Normal
05/09/2026 05 PM PDT 2.88 389 0 Normal
05/09/2026 06 PM PDT 2.87 387 - Normal
05/09/2026 07 PM PDT 2.87 387 0 Normal
05/09/2026 08 PM PDT 2.87 387 0 Normal
05/09/2026 09 PM PDT 2.86 385 - Normal
05/09/2026 10 PM PDT 2.86 385 0 Normal
05/09/2026 11 PM PDT 2.86 385 0 Normal
05/10/2026 12 AM PDT 2.86 385 0 Normal
05/10/2026 01 AM PDT 2.85 382 - Normal
05/10/2026 02 AM PDT 2.85 382 0 Normal
05/10/2026 03 AM PDT 2.85 382 0 Normal
05/10/2026 04 AM PDT 2.85 382 0 Normal
05/10/2026 05 AM PDT 2.85 382 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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