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RUSSIAN RIVER - GEYSERVILLE (GEYC1)
| Latitude: 38.71º N | Longitude: 122.89º W | Elevation: 190 Feet | | Forecast Type: Unofficial Location |
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | Apr 11 2026 at 8:32 AM PDT | Next Issuance: | Apr 12 2026 at 9:00 AM PDT
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| Action/Monitor: 38.0 Feet | Minor Flood: 39.7 Feet | Moderate Flood: 46.0 Feet | Major Flood: 50.0 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Russian River - Geyserville (GEYC1)
#
# File Generation Time: 04/11/2026 at 08:34 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/11/2026 at 08:00 AM PDT
# Maximum Observed Stage: 25.75 Feet
# Maximum Observed Flow: 545 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/12/2026 at 06:00 AM PDT
# Maximum Forecast Stage: 28.32 Feet
# Maximum Forecast Flow: 1810 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/06/2026 08 AM PDT 25.19 360 Normal
04/06/2026 09 AM PDT 25.19 360 0 Normal
04/06/2026 10 AM PDT 25.19 360 0 Normal
04/06/2026 11 AM PDT 25.21 366 + Normal
04/06/2026 12 PM PDT 25.21 366 0 Normal
04/06/2026 01 PM PDT 25.21 366 0 Normal
04/06/2026 02 PM PDT 25.21 366 0 Normal
04/06/2026 03 PM PDT 25.21 366 0 Normal
04/06/2026 04 PM PDT 25.22 369 + Normal
04/06/2026 05 PM PDT 25.21 366 - Normal
04/06/2026 06 PM PDT 25.20 363 - Normal
04/06/2026 07 PM PDT 25.20 363 0 Normal
04/06/2026 08 PM PDT 25.17 354 - Normal
04/06/2026 09 PM PDT 25.20 363 + Normal
04/06/2026 10 PM PDT 25.20 363 0 Normal
04/06/2026 11 PM PDT 25.20 363 0 Normal
04/07/2026 12 AM PDT 25.19 360 - Normal
04/07/2026 01 AM PDT 25.18 357 - Normal
04/07/2026 02 AM PDT 25.18 357 0 Normal
04/07/2026 03 AM PDT 25.19 360 + Normal
04/07/2026 04 AM PDT 25.19 360 0 Normal
04/07/2026 05 AM PDT 25.19 360 0 Normal
04/07/2026 06 AM PDT 25.19 360 0 Normal
04/07/2026 07 AM PDT 25.16 351 - Normal
04/07/2026 08 AM PDT 25.17 354 + Normal
04/07/2026 09 AM PDT 25.18 357 + Normal
04/07/2026 10 AM PDT 25.19 360 + Normal
04/07/2026 11 AM PDT 25.19 360 0 Normal
04/07/2026 12 PM PDT 25.19 360 0 Normal
04/07/2026 01 PM PDT 25.20 363 + Normal
04/07/2026 02 PM PDT 25.19 360 - Normal
04/07/2026 03 PM PDT 25.19 360 0 Normal
04/07/2026 04 PM PDT 25.20 363 + Normal
04/07/2026 05 PM PDT 25.20 363 0 Normal
04/07/2026 06 PM PDT 25.19 360 - Normal
04/07/2026 07 PM PDT 25.18 357 - Normal
04/07/2026 08 PM PDT 25.17 354 - Normal
04/07/2026 09 PM PDT 25.16 351 - Normal
04/07/2026 10 PM PDT 25.17 354 + Normal
04/07/2026 11 PM PDT 25.17 354 0 Normal
04/08/2026 12 AM PDT 25.16 351 - Normal
04/08/2026 01 AM PDT 25.16 351 0 Normal
04/08/2026 02 AM PDT 25.16 351 0 Normal
04/08/2026 03 AM PDT 25.16 351 0 Normal
04/08/2026 04 AM PDT 25.16 351 0 Normal
04/08/2026 05 AM PDT 25.16 351 0 Normal
04/08/2026 06 AM PDT 25.16 351 0 Normal
04/08/2026 07 AM PDT 25.15 348 - Normal
04/08/2026 08 AM PDT 25.16 351 + Normal
04/08/2026 09 AM PDT 25.15 348 - Normal
04/08/2026 10 AM PDT 25.15 348 0 Normal
04/08/2026 11 AM PDT 25.16 351 + Normal
04/08/2026 12 PM PDT 25.17 354 + Normal
04/08/2026 01 PM PDT 25.17 354 0 Normal
04/08/2026 02 PM PDT 25.17 354 0 Normal
04/08/2026 03 PM PDT 25.16 351 - Normal
04/08/2026 04 PM PDT 25.16 351 0 Normal
04/08/2026 05 PM PDT 25.16 351 0 Normal
04/08/2026 06 PM PDT 25.16 351 0 Normal
04/08/2026 07 PM PDT 25.15 348 - Normal
04/08/2026 08 PM PDT 25.15 348 0 Normal
04/08/2026 09 PM PDT 25.15 348 0 Normal
04/08/2026 10 PM PDT 25.15 348 0 Normal
04/08/2026 11 PM PDT 25.15 348 0 Normal
04/09/2026 12 AM PDT 25.15 348 0 Normal
04/09/2026 01 AM PDT 25.14 345 - Normal
04/09/2026 02 AM PDT 25.14 345 0 Normal
04/09/2026 03 AM PDT 25.14 345 0 Normal
04/09/2026 04 AM PDT 25.14 345 0 Normal
04/09/2026 05 AM PDT 25.14 345 0 Normal
04/09/2026 06 AM PDT 25.14 345 0 Normal
04/09/2026 07 AM PDT 25.14 345 0 Normal
04/09/2026 08 AM PDT 25.14 345 0 Normal
04/09/2026 09 AM PDT 25.15 348 + Normal
04/09/2026 10 AM PDT 25.14 345 - Normal
04/09/2026 11 AM PDT 25.13 342 - Normal
04/09/2026 12 PM PDT 25.15 348 + Normal
04/09/2026 01 PM PDT 25.14 345 - Normal
04/09/2026 02 PM PDT 25.15 348 + Normal
04/09/2026 03 PM PDT 25.16 351 + Normal
04/09/2026 04 PM PDT 25.15 348 - Normal
04/09/2026 05 PM PDT 25.15 348 0 Normal
04/09/2026 06 PM PDT 25.14 345 - Normal
04/09/2026 07 PM PDT 25.14 345 0 Normal
04/09/2026 08 PM PDT 25.13 342 - Normal
04/09/2026 09 PM PDT 25.15 348 + Normal
04/09/2026 10 PM PDT 25.15 348 0 Normal
04/09/2026 11 PM PDT 25.14 345 - Normal
04/10/2026 12 AM PDT 25.13 342 - Normal
04/10/2026 01 AM PDT 25.14 345 + Normal
04/10/2026 02 AM PDT 25.13 342 - Normal
04/10/2026 03 AM PDT 25.14 345 + Normal
04/10/2026 04 AM PDT 25.14 345 0 Normal
04/10/2026 05 AM PDT 25.14 345 0 Normal
04/10/2026 06 AM PDT 25.15 348 + Normal
04/10/2026 07 AM PDT 25.17 354 + Normal
04/10/2026 08 AM PDT 25.17 354 0 Normal
04/10/2026 09 AM PDT 25.16 351 - Normal
04/10/2026 10 AM PDT 25.16 351 0 Normal
04/10/2026 11 AM PDT 25.16 351 0 Normal
04/10/2026 12 PM PDT 25.17 354 + Normal
04/10/2026 01 PM PDT 25.18 357 + Normal
04/10/2026 02 PM PDT 25.19 360 + Normal
04/10/2026 03 PM PDT 25.19 360 0 Normal
04/10/2026 04 PM PDT 25.19 360 0 Normal
04/10/2026 05 PM PDT 25.20 363 + Normal
04/10/2026 06 PM PDT 25.20 363 0 Normal
04/10/2026 07 PM PDT 25.22 369 + Normal
04/10/2026 08 PM PDT 25.24 375 + Normal
04/10/2026 09 PM PDT 25.27 385 + Normal
04/10/2026 10 PM PDT 25.28 388 + Normal
04/10/2026 11 PM PDT 25.28 388 0 Normal
04/11/2026 12 AM PDT 25.29 391 + Normal
04/11/2026 01 AM PDT 25.31 397 + Normal
04/11/2026 02 AM PDT 25.34 407 + Normal
04/11/2026 03 AM PDT 25.41 429 + Normal
04/11/2026 04 AM PDT 25.51 462 + Normal
04/11/2026 05 AM PDT 25.62 499 + Normal
04/11/2026 06 AM PDT 25.68 520 + Normal
04/11/2026 07 AM PDT 25.71 531 + Normal
04/11/2026 08 AM PDT 25.75 545 + Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/11/2026 09 AM PDT 25.76 549 Normal
04/11/2026 10 AM PDT 25.76 549 0 Normal
04/11/2026 11 AM PDT 25.75 545 - Normal
04/11/2026 12 PM PDT 25.73 538 - Normal
04/11/2026 01 PM PDT 25.72 534 - Normal
04/11/2026 02 PM PDT 25.74 541 + Normal
04/11/2026 03 PM PDT 25.77 552 + Normal
04/11/2026 04 PM PDT 25.83 574 + Normal
04/11/2026 05 PM PDT 25.91 603 + Normal
04/11/2026 06 PM PDT 26.02 646 + Normal
04/11/2026 07 PM PDT 26.23 732 + Normal
04/11/2026 08 PM PDT 26.50 849 + Normal
04/11/2026 09 PM PDT 26.76 968 + Normal
04/11/2026 10 PM PDT 27.09 1128 + Normal
04/11/2026 11 PM PDT 27.29 1229 + Normal
04/12/2026 12 AM PDT 27.48 1329 + Normal
04/12/2026 01 AM PDT 27.70 1449 + Normal
04/12/2026 02 AM PDT 27.91 1568 + Normal
04/12/2026 03 AM PDT 28.10 1678 + Normal
04/12/2026 04 AM PDT 28.24 1761 + Normal
04/12/2026 05 AM PDT 28.31 1804 + Normal
04/12/2026 06 AM PDT 28.32 1810 + Normal
04/12/2026 07 AM PDT 28.30 1798 - Normal
04/12/2026 08 AM PDT 28.26 1773 - Normal
04/12/2026 09 AM PDT 28.22 1749 - Normal
04/12/2026 10 AM PDT 28.19 1731 - Normal
04/12/2026 11 AM PDT 28.15 1708 - Normal
04/12/2026 12 PM PDT 28.10 1678 - Normal
04/12/2026 01 PM PDT 28.02 1631 - Normal
04/12/2026 02 PM PDT 27.93 1579 - Normal
04/12/2026 03 PM PDT 27.86 1539 - Normal
04/12/2026 04 PM PDT 27.80 1505 - Normal
04/12/2026 05 PM PDT 27.74 1472 - Normal
04/12/2026 06 PM PDT 27.66 1427 - Normal
04/12/2026 07 PM PDT 27.56 1373 - Normal
04/12/2026 08 PM PDT 27.45 1313 - Normal
04/12/2026 09 PM PDT 27.35 1261 - Normal
04/12/2026 10 PM PDT 27.25 1209 - Normal
04/12/2026 11 PM PDT 27.16 1163 - Normal
04/13/2026 12 AM PDT 27.06 1113 - Normal
04/13/2026 01 AM PDT 26.94 1054 - Normal
04/13/2026 02 AM PDT 26.82 996 - Normal
04/13/2026 03 AM PDT 26.73 954 - Normal
04/13/2026 04 AM PDT 26.67 926 - Normal
04/13/2026 05 AM PDT 26.60 894 - Normal
04/13/2026 06 AM PDT 26.54 867 - Normal
04/13/2026 07 AM PDT 26.47 835 - Normal
04/13/2026 08 AM PDT 26.41 809 - Normal
04/13/2026 09 AM PDT 26.35 783 - Normal
04/13/2026 10 AM PDT 26.29 757 - Normal
04/13/2026 11 AM PDT 26.24 736 - Normal
04/13/2026 12 PM PDT 26.19 715 - Normal
04/13/2026 01 PM PDT 26.15 699 - Normal
04/13/2026 02 PM PDT 26.12 687 - Normal
04/13/2026 03 PM PDT 26.09 674 - Normal
04/13/2026 04 PM PDT 26.07 666 - Normal
04/13/2026 05 PM PDT 26.05 658 - Normal
04/13/2026 06 PM PDT 26.04 654 - Normal
04/13/2026 07 PM PDT 26.04 654 0 Normal
04/13/2026 08 PM PDT 26.03 650 - Normal
04/13/2026 09 PM PDT 26.03 650 0 Normal
04/13/2026 10 PM PDT 26.03 650 0 Normal
04/13/2026 11 PM PDT 26.03 650 0 Normal
04/14/2026 12 AM PDT 26.02 646 - Normal
04/14/2026 01 AM PDT 26.02 646 0 Normal
04/14/2026 02 AM PDT 26.01 642 - Normal
04/14/2026 03 AM PDT 26.00 638 - Normal
04/14/2026 04 AM PDT 25.99 634 - Normal
04/14/2026 05 AM PDT 25.98 631 - Normal
04/14/2026 06 AM PDT 25.97 627 - Normal
04/14/2026 07 AM PDT 25.96 623 - Normal
04/14/2026 08 AM PDT 25.94 615 - Normal
04/14/2026 09 AM PDT 25.93 611 - Normal
04/14/2026 10 AM PDT 25.91 603 - Normal
04/14/2026 11 AM PDT 25.90 600 - Normal
04/14/2026 12 PM PDT 25.89 596 - Normal
04/14/2026 01 PM PDT 25.88 592 - Normal
04/14/2026 02 PM PDT 25.86 585 - Normal
04/14/2026 03 PM PDT 25.85 581 - Normal
04/14/2026 04 PM PDT 25.84 578 - Normal
04/14/2026 05 PM PDT 25.82 570 - Normal
04/14/2026 06 PM PDT 25.81 567 - Normal
04/14/2026 07 PM PDT 25.80 563 - Normal
04/14/2026 08 PM PDT 25.79 559 - Normal
04/14/2026 09 PM PDT 25.78 556 - Normal
04/14/2026 10 PM PDT 25.77 552 - Normal
04/14/2026 11 PM PDT 25.77 552 0 Normal
04/15/2026 12 AM PDT 25.76 549 - Normal
04/15/2026 01 AM PDT 25.75 545 - Normal
04/15/2026 02 AM PDT 25.74 541 - Normal
04/15/2026 03 AM PDT 25.73 538 - Normal
04/15/2026 04 AM PDT 25.73 538 0 Normal
04/15/2026 05 AM PDT 25.72 534 - Normal
04/15/2026 06 AM PDT 25.71 531 - Normal
04/15/2026 07 AM PDT 25.71 531 0 Normal
04/15/2026 08 AM PDT 25.70 527 - Normal
04/15/2026 09 AM PDT 25.70 527 0 Normal
04/15/2026 10 AM PDT 25.69 524 - Normal
04/15/2026 11 AM PDT 25.69 524 0 Normal
04/15/2026 12 PM PDT 25.68 520 - Normal
04/15/2026 01 PM PDT 25.68 520 0 Normal
04/15/2026 02 PM PDT 25.68 520 0 Normal
04/15/2026 03 PM PDT 25.67 517 - Normal
04/15/2026 04 PM PDT 25.67 517 0 Normal
04/15/2026 05 PM PDT 25.66 513 - Normal
04/15/2026 06 PM PDT 25.66 513 0 Normal
04/15/2026 07 PM PDT 25.65 510 - Normal
04/15/2026 08 PM PDT 25.65 510 0 Normal
04/15/2026 09 PM PDT 25.65 510 0 Normal
04/15/2026 10 PM PDT 25.64 506 - Normal
04/15/2026 11 PM PDT 25.64 506 0 Normal
04/16/2026 12 AM PDT 25.64 506 0 Normal
04/16/2026 01 AM PDT 25.63 503 - Normal
04/16/2026 02 AM PDT 25.63 503 0 Normal
04/16/2026 03 AM PDT 25.63 503 0 Normal
04/16/2026 04 AM PDT 25.62 499 - Normal
04/16/2026 05 AM PDT 25.62 499 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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