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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: | Apr 27 2026 at 7:22 AM PDT | Next Issuance: | Apr 28 2026 at 9:00 AM PDT
| |
| 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: 04/27/2026 at 07:23 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/22/2026 at 03:00 PM PDT
# Maximum Observed Stage: 6.46 Feet
# Maximum Observed Flow: 1547 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/27/2026 at 08:00 AM PDT
# Maximum Forecast Stage: 4.41 Feet
# Maximum Forecast Flow: 758 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/22/2026 07 AM PDT 6.42 1529 Normal
04/22/2026 08 AM PDT 6.41 1525 - Normal
04/22/2026 09 AM PDT 6.40 1520 - Normal
04/22/2026 10 AM PDT 6.41 1525 + Normal
04/22/2026 11 AM PDT 6.43 1534 + Normal
04/22/2026 12 PM PDT 6.45 1543 + Normal
04/22/2026 01 PM PDT 6.46 1547 + Normal
04/22/2026 02 PM PDT 6.46 1547 0 Normal
04/22/2026 03 PM PDT 6.46 1547 0 Normal
04/22/2026 04 PM PDT 6.45 1543 - Normal
04/22/2026 05 PM PDT 6.45 1543 0 Normal
04/22/2026 06 PM PDT 6.44 1538 - Normal
04/22/2026 07 PM PDT 6.44 1538 0 Normal
04/22/2026 08 PM PDT 6.42 1529 - Normal
04/22/2026 09 PM PDT 6.41 1525 - Normal
04/22/2026 10 PM PDT 6.39 1516 - Normal
04/22/2026 11 PM PDT 6.38 1511 - Normal
04/23/2026 12 AM PDT 6.38 1511 0 Normal
04/23/2026 01 AM PDT 6.36 1503 - Normal
04/23/2026 02 AM PDT 6.36 1503 0 Normal
04/23/2026 03 AM PDT 6.35 1498 - Normal
04/23/2026 04 AM PDT 6.33 1489 - Normal
04/23/2026 05 AM PDT 6.33 1489 0 Normal
04/23/2026 06 AM PDT 6.31 1480 - Normal
04/23/2026 07 AM PDT 6.29 1472 - Normal
04/23/2026 08 AM PDT 6.27 1463 - Normal
04/23/2026 09 AM PDT 6.24 1450 - Normal
04/23/2026 10 AM PDT 6.23 1445 - Normal
04/23/2026 11 AM PDT 6.21 1436 - Normal
04/23/2026 12 PM PDT 6.19 1428 - Normal
04/23/2026 01 PM PDT 6.16 1415 - Normal
04/23/2026 02 PM PDT 6.14 1406 - Normal
04/23/2026 03 PM PDT 6.12 1398 - Normal
04/23/2026 04 PM PDT 6.09 1385 - Normal
04/23/2026 05 PM PDT 6.07 1376 - Normal
04/23/2026 06 PM PDT 6.04 1363 - Normal
04/23/2026 07 PM PDT 6.01 1351 - Normal
04/23/2026 08 PM PDT 5.98 1338 - Normal
04/23/2026 09 PM PDT 5.95 1325 - Normal
04/23/2026 10 PM PDT 5.94 1321 - Normal
04/23/2026 11 PM PDT 5.91 1309 - Normal
04/24/2026 12 AM PDT 5.88 1296 - Normal
04/24/2026 01 AM PDT 5.86 1288 - Normal
04/24/2026 02 AM PDT 5.82 1271 - Normal
04/24/2026 03 AM PDT 5.80 1263 - Normal
04/24/2026 04 AM PDT 5.77 1251 - Normal
04/24/2026 05 AM PDT 5.75 1243 - Normal
04/24/2026 06 AM PDT 5.72 1230 - Normal
04/24/2026 07 AM PDT 5.69 1218 - Normal
04/24/2026 08 AM PDT 5.67 1210 - Normal
04/24/2026 09 AM PDT 5.65 1202 - Normal
04/24/2026 10 AM PDT 5.62 1190 - Normal
04/24/2026 11 AM PDT 5.59 1178 - Normal
04/24/2026 12 PM PDT 5.56 1166 - Normal
04/24/2026 01 PM PDT 5.54 1158 - Normal
04/24/2026 02 PM PDT 5.53 1155 - Normal
04/24/2026 03 PM PDT 5.51 1147 - Normal
04/24/2026 04 PM PDT 5.48 1135 - Normal
04/24/2026 05 PM PDT 5.47 1131 - Normal
04/24/2026 06 PM PDT 5.44 1119 - Normal
04/24/2026 07 PM PDT 5.42 1112 - Normal
04/24/2026 08 PM PDT 5.39 1100 - Normal
04/24/2026 09 PM PDT 5.38 1096 - Normal
04/24/2026 10 PM PDT 5.34 1081 - Normal
04/24/2026 11 PM PDT 5.32 1073 - Normal
04/25/2026 12 AM PDT 5.30 1066 - Normal
04/25/2026 01 AM PDT 5.29 1062 - Normal
04/25/2026 02 AM PDT 5.26 1051 - Normal
04/25/2026 03 AM PDT 5.26 1051 0 Normal
04/25/2026 04 AM PDT 5.23 1039 - Normal
04/25/2026 05 AM PDT 5.21 1032 - Normal
04/25/2026 06 AM PDT 5.19 1024 - Normal
04/25/2026 07 AM PDT 5.17 1017 - Normal
04/25/2026 08 AM PDT 5.15 1010 - Normal
04/25/2026 09 AM PDT 5.13 1002 - Normal
04/25/2026 10 AM PDT 5.11 995 - Normal
04/25/2026 11 AM PDT 5.09 988 - Normal
04/25/2026 12 PM PDT 5.08 984 - Normal
04/25/2026 01 PM PDT 5.06 977 - Normal
04/25/2026 02 PM PDT 5.04 969 - Normal
04/25/2026 03 PM PDT 5.03 966 - Normal
04/25/2026 04 PM PDT 5.01 959 - Normal
04/25/2026 05 PM PDT 4.98 948 - Normal
04/25/2026 06 PM PDT 4.97 944 - Normal
04/25/2026 07 PM PDT 4.96 941 - Normal
04/25/2026 08 PM PDT 4.94 933 - Normal
04/25/2026 09 PM PDT 4.92 926 - Normal
04/25/2026 10 PM PDT 4.91 923 - Normal
04/25/2026 11 PM PDT 4.88 912 - Normal
04/26/2026 12 AM PDT 4.87 909 - Normal
04/26/2026 01 AM PDT 4.86 905 - Normal
04/26/2026 02 AM PDT 4.85 902 - Normal
04/26/2026 03 AM PDT 4.83 895 - Normal
04/26/2026 04 AM PDT 4.82 891 - Normal
04/26/2026 05 AM PDT 4.80 884 - Normal
04/26/2026 06 AM PDT 4.79 881 - Normal
04/26/2026 07 AM PDT 4.77 874 - Normal
04/26/2026 08 AM PDT 4.75 867 - Normal
04/26/2026 09 AM PDT 4.74 864 - Normal
04/26/2026 10 AM PDT 4.74 864 0 Normal
04/26/2026 11 AM PDT 4.71 853 - Normal
04/26/2026 12 PM PDT 4.70 850 - Normal
04/26/2026 01 PM PDT 4.69 846 - Normal
04/26/2026 02 PM PDT 4.67 840 - Normal
04/26/2026 03 PM PDT 4.66 836 - Normal
04/26/2026 04 PM PDT 4.64 830 - Normal
04/26/2026 05 PM PDT 4.63 826 - Normal
04/26/2026 06 PM PDT 4.61 819 - Normal
04/26/2026 07 PM PDT 4.60 816 - Normal
04/26/2026 08 PM PDT 4.58 809 - Normal
04/26/2026 09 PM PDT 4.58 809 0 Normal
04/26/2026 10 PM PDT 4.56 803 - Normal
04/26/2026 11 PM PDT 4.55 800 - Normal
04/27/2026 12 AM PDT 4.53 794 - Normal
04/27/2026 01 AM PDT 4.52 791 - Normal
04/27/2026 02 AM PDT 4.50 785 - Normal
04/27/2026 03 AM PDT 4.49 782 - Normal
04/27/2026 04 AM PDT 4.48 779 - Normal
04/27/2026 05 AM PDT 4.46 773 - Normal
04/27/2026 06 AM PDT 4.45 770 - Normal
04/27/2026 07 AM PDT 4.43 764 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/27/2026 08 AM PDT 4.41 758 Normal
04/27/2026 09 AM PDT 4.40 755 - Normal
04/27/2026 10 AM PDT 4.38 749 - Normal
04/27/2026 11 AM PDT 4.37 747 - Normal
04/27/2026 12 PM PDT 4.35 741 - Normal
04/27/2026 01 PM PDT 4.33 735 - Normal
04/27/2026 02 PM PDT 4.31 729 - Normal
04/27/2026 03 PM PDT 4.30 726 - Normal
04/27/2026 04 PM PDT 4.28 720 - Normal
04/27/2026 05 PM PDT 4.26 715 - Normal
04/27/2026 06 PM PDT 4.24 709 - Normal
04/27/2026 07 PM PDT 4.22 703 - Normal
04/27/2026 08 PM PDT 4.21 700 - Normal
04/27/2026 09 PM PDT 4.19 695 - Normal
04/27/2026 10 PM PDT 4.17 689 - Normal
04/27/2026 11 PM PDT 4.15 683 - Normal
04/28/2026 12 AM PDT 4.14 680 - Normal
04/28/2026 01 AM PDT 4.12 675 - Normal
04/28/2026 02 AM PDT 4.11 672 - Normal
04/28/2026 03 AM PDT 4.09 666 - Normal
04/28/2026 04 AM PDT 4.08 664 - Normal
04/28/2026 05 AM PDT 4.07 661 - Normal
04/28/2026 06 AM PDT 4.06 658 - Normal
04/28/2026 07 AM PDT 4.04 653 - Normal
04/28/2026 08 AM PDT 4.03 650 - Normal
04/28/2026 09 AM PDT 4.02 647 - Normal
04/28/2026 10 AM PDT 4.01 644 - Normal
04/28/2026 11 AM PDT 4.00 642 - Normal
04/28/2026 12 PM PDT 3.99 639 - Normal
04/28/2026 01 PM PDT 3.98 636 - Normal
04/28/2026 02 PM PDT 3.97 633 - Normal
04/28/2026 03 PM PDT 3.96 631 - Normal
04/28/2026 04 PM PDT 3.95 628 - Normal
04/28/2026 05 PM PDT 3.94 625 - Normal
04/28/2026 06 PM PDT 3.92 620 - Normal
04/28/2026 07 PM PDT 3.91 617 - Normal
04/28/2026 08 PM PDT 3.90 615 - Normal
04/28/2026 09 PM PDT 3.89 612 - Normal
04/28/2026 10 PM PDT 3.88 609 - Normal
04/28/2026 11 PM PDT 3.87 607 - Normal
04/29/2026 12 AM PDT 3.85 602 - Normal
04/29/2026 01 AM PDT 3.84 599 - Normal
04/29/2026 02 AM PDT 3.83 597 - Normal
04/29/2026 03 AM PDT 3.82 594 - Normal
04/29/2026 04 AM PDT 3.81 592 - Normal
04/29/2026 05 AM PDT 3.80 589 - Normal
04/29/2026 06 AM PDT 3.79 586 - Normal
04/29/2026 07 AM PDT 3.78 584 - Normal
04/29/2026 08 AM PDT 3.77 581 - Normal
04/29/2026 09 AM PDT 3.76 579 - Normal
04/29/2026 10 AM PDT 3.75 576 - Normal
04/29/2026 11 AM PDT 3.74 574 - Normal
04/29/2026 12 PM PDT 3.73 571 - Normal
04/29/2026 01 PM PDT 3.72 569 - Normal
04/29/2026 02 PM PDT 3.71 566 - Normal
04/29/2026 03 PM PDT 3.70 564 - Normal
04/29/2026 04 PM PDT 3.69 562 - Normal
04/29/2026 05 PM PDT 3.68 559 - Normal
04/29/2026 06 PM PDT 3.67 557 - Normal
04/29/2026 07 PM PDT 3.65 552 - Normal
04/29/2026 08 PM PDT 3.64 549 - Normal
04/29/2026 09 PM PDT 3.63 547 - Normal
04/29/2026 10 PM PDT 3.62 544 - Normal
04/29/2026 11 PM PDT 3.61 542 - Normal
04/30/2026 12 AM PDT 3.60 540 - Normal
04/30/2026 01 AM PDT 3.59 537 - Normal
04/30/2026 02 AM PDT 3.58 535 - Normal
04/30/2026 03 AM PDT 3.57 532 - Normal
04/30/2026 04 AM PDT 3.56 530 - Normal
04/30/2026 05 AM PDT 3.55 528 - Normal
04/30/2026 06 AM PDT 3.54 525 - Normal
04/30/2026 07 AM PDT 3.53 523 - Normal
04/30/2026 08 AM PDT 3.52 521 - Normal
04/30/2026 09 AM PDT 3.51 518 - Normal
04/30/2026 10 AM PDT 3.50 516 - Normal
04/30/2026 11 AM PDT 3.49 514 - Normal
04/30/2026 12 PM PDT 3.48 511 - Normal
04/30/2026 01 PM PDT 3.47 509 - Normal
04/30/2026 02 PM PDT 3.46 507 - Normal
04/30/2026 03 PM PDT 3.45 504 - Normal
04/30/2026 04 PM PDT 3.44 502 - Normal
04/30/2026 05 PM PDT 3.43 500 - Normal
04/30/2026 06 PM PDT 3.41 495 - Normal
04/30/2026 07 PM PDT 3.40 493 - Normal
04/30/2026 08 PM PDT 3.39 491 - Normal
04/30/2026 09 PM PDT 3.38 488 - Normal
04/30/2026 10 PM PDT 3.38 488 0 Normal
04/30/2026 11 PM PDT 3.37 486 - Normal
05/01/2026 12 AM PDT 3.36 484 - Normal
05/01/2026 01 AM PDT 3.35 482 - Normal
05/01/2026 02 AM PDT 3.34 479 - Normal
05/01/2026 03 AM PDT 3.33 477 - Normal
05/01/2026 04 AM PDT 3.32 475 - Normal
05/01/2026 05 AM PDT 3.32 475 0 Normal
05/01/2026 06 AM PDT 3.31 473 - Normal
05/01/2026 07 AM PDT 3.30 470 - Normal
05/01/2026 08 AM PDT 3.29 468 - Normal
05/01/2026 09 AM PDT 3.29 468 0 Normal
05/01/2026 10 AM PDT 3.28 466 - Normal
05/01/2026 11 AM PDT 3.27 464 - Normal
05/01/2026 12 PM PDT 3.27 464 0 Normal
05/01/2026 01 PM PDT 3.26 462 - Normal
05/01/2026 02 PM PDT 3.25 459 - Normal
05/01/2026 03 PM PDT 3.25 459 0 Normal
05/01/2026 04 PM PDT 3.24 457 - Normal
05/01/2026 05 PM PDT 3.23 455 - Normal
05/01/2026 06 PM PDT 3.22 453 - Normal
05/01/2026 07 PM PDT 3.22 453 0 Normal
05/01/2026 08 PM PDT 3.21 451 - Normal
05/01/2026 09 PM PDT 3.21 451 0 Normal
05/01/2026 10 PM PDT 3.20 449 - Normal
05/01/2026 11 PM PDT 3.19 446 - Normal
05/02/2026 12 AM PDT 3.19 446 0 Normal
05/02/2026 01 AM PDT 3.18 444 - Normal
05/02/2026 02 AM PDT 3.18 444 0 Normal
05/02/2026 03 AM PDT 3.17 442 - Normal
05/02/2026 04 AM PDT 3.17 442 0 Normal
05/02/2026 05 AM PDT 3.16 440 - 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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