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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 25 2026 at 8:45 AM PDT | Next Issuance: | Apr 26 2026 at 9:00 AM PDT
| |
| 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: 04/25/2026 at 08:46 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/21/2026 at 02:00 PM PDT
# Maximum Observed Stage: 26.00 Feet
# Maximum Observed Flow: 638 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/25/2026 at 09:00 AM PDT
# Maximum Forecast Stage: 25.21 Feet
# Maximum Forecast Flow: 366 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/20/2026 08 AM PDT 25.01 308 Normal
04/20/2026 09 AM PDT 25.02 310 + Normal
04/20/2026 10 AM PDT 25.01 308 - Normal
04/20/2026 11 AM PDT 25.02 310 + Normal
04/20/2026 12 PM PDT 25.02 310 0 Normal
04/20/2026 01 PM PDT 25.03 313 + Normal
04/20/2026 02 PM PDT 25.06 322 + Normal
04/20/2026 03 PM PDT 25.08 328 + Normal
04/20/2026 04 PM PDT 25.08 328 0 Normal
04/20/2026 05 PM PDT 25.09 331 + Normal
04/20/2026 06 PM PDT 25.13 342 + Normal
04/20/2026 07 PM PDT 25.13 342 0 Normal
04/20/2026 08 PM PDT 25.14 345 + Normal
04/20/2026 09 PM PDT 25.15 348 + Normal
04/20/2026 10 PM PDT 25.17 354 + Normal
04/20/2026 11 PM PDT 25.20 363 + Normal
04/21/2026 12 AM PDT 25.22 369 + Normal
04/21/2026 01 AM PDT 25.27 385 + Normal
04/21/2026 02 AM PDT 25.35 410 + Normal
04/21/2026 03 AM PDT 25.59 489 + Normal
04/21/2026 04 AM PDT 25.79 559 + Normal
04/21/2026 05 AM PDT 25.90 600 + Normal
04/21/2026 06 AM PDT 25.95 619 + Normal
04/21/2026 07 AM PDT 25.95 619 0 Normal
04/21/2026 08 AM PDT 25.95 619 0 Normal
04/21/2026 09 AM PDT 25.95 619 0 Normal
04/21/2026 10 AM PDT 25.95 619 0 Normal
04/21/2026 11 AM PDT 25.94 615 - Normal
04/21/2026 12 PM PDT 25.95 619 + Normal
04/21/2026 01 PM PDT 26.00 638 + Normal
04/21/2026 02 PM PDT 26.00 638 0 Normal
04/21/2026 03 PM PDT 25.98 631 - Normal
04/21/2026 04 PM PDT 25.95 619 - Normal
04/21/2026 05 PM PDT 25.95 619 0 Normal
04/21/2026 06 PM PDT 25.94 615 - Normal
04/21/2026 07 PM PDT 25.94 615 0 Normal
04/21/2026 08 PM PDT 25.95 619 + Normal
04/21/2026 09 PM PDT 25.95 619 0 Normal
04/21/2026 10 PM PDT 25.95 619 0 Normal
04/21/2026 11 PM PDT 25.94 615 - Normal
04/22/2026 12 AM PDT 25.93 611 - Normal
04/22/2026 01 AM PDT 25.93 611 0 Normal
04/22/2026 02 AM PDT 25.92 607 - Normal
04/22/2026 03 AM PDT 25.91 603 - Normal
04/22/2026 04 AM PDT 25.91 603 0 Normal
04/22/2026 05 AM PDT 25.89 596 - Normal
04/22/2026 06 AM PDT 25.87 589 - Normal
04/22/2026 07 AM PDT 25.87 589 0 Normal
04/22/2026 08 AM PDT 25.85 581 - Normal
04/22/2026 09 AM PDT 25.84 578 - Normal
04/22/2026 10 AM PDT 25.83 574 - Normal
04/22/2026 11 AM PDT 25.82 570 - Normal
04/22/2026 12 PM PDT 25.79 559 - Normal
04/22/2026 01 PM PDT 25.80 563 + Normal
04/22/2026 02 PM PDT 25.78 556 - Normal
04/22/2026 03 PM PDT 25.79 559 + Normal
04/22/2026 04 PM PDT 25.79 559 0 Normal
04/22/2026 05 PM PDT 25.78 556 - Normal
04/22/2026 06 PM PDT 25.76 549 - Normal
04/22/2026 07 PM PDT 25.75 545 - Normal
04/22/2026 08 PM PDT 25.74 541 - Normal
04/22/2026 09 PM PDT 25.72 534 - Normal
04/22/2026 10 PM PDT 25.72 534 0 Normal
04/22/2026 11 PM PDT 25.69 524 - Normal
04/23/2026 12 AM PDT 25.68 520 - Normal
04/23/2026 01 AM PDT 25.65 510 - Normal
04/23/2026 02 AM PDT 25.65 510 0 Normal
04/23/2026 03 AM PDT 25.63 503 - Normal
04/23/2026 04 AM PDT 25.62 499 - Normal
04/23/2026 05 AM PDT 25.60 492 - Normal
04/23/2026 06 AM PDT 25.58 486 - Normal
04/23/2026 07 AM PDT 25.57 482 - Normal
04/23/2026 08 AM PDT 25.55 475 - Normal
04/23/2026 09 AM PDT 25.55 475 0 Normal
04/23/2026 10 AM PDT 25.52 465 - Normal
04/23/2026 11 AM PDT 25.52 465 0 Normal
04/23/2026 12 PM PDT 25.51 462 - Normal
04/23/2026 01 PM PDT 25.51 462 0 Normal
04/23/2026 02 PM PDT 25.51 462 0 Normal
04/23/2026 03 PM PDT 25.50 459 - Normal
04/23/2026 04 PM PDT 25.48 452 - Normal
04/23/2026 05 PM PDT 25.48 452 0 Normal
04/23/2026 06 PM PDT 25.47 449 - Normal
04/23/2026 07 PM PDT 25.45 442 - Normal
04/23/2026 08 PM PDT 25.44 439 - Normal
04/23/2026 09 PM PDT 25.43 436 - Normal
04/23/2026 10 PM PDT 25.42 432 - Normal
04/23/2026 11 PM PDT 25.40 426 - Normal
04/24/2026 12 AM PDT 25.39 423 - Normal
04/24/2026 01 AM PDT 25.39 423 0 Normal
04/24/2026 02 AM PDT 25.37 416 - Normal
04/24/2026 03 AM PDT 25.36 413 - Normal
04/24/2026 04 AM PDT 25.36 413 0 Normal
04/24/2026 05 AM PDT 25.34 407 - Normal
04/24/2026 06 AM PDT 25.34 407 0 Normal
04/24/2026 07 AM PDT 25.34 407 0 Normal
04/24/2026 08 AM PDT 25.31 397 - Normal
04/24/2026 09 AM PDT 25.33 403 + Normal
04/24/2026 10 AM PDT 25.32 400 - Normal
04/24/2026 11 AM PDT 25.32 400 0 Normal
04/24/2026 12 PM PDT 25.32 400 0 Normal
04/24/2026 01 PM PDT 25.31 397 - Normal
04/24/2026 02 PM PDT 25.30 394 - Normal
04/24/2026 03 PM PDT 25.31 397 + Normal
04/24/2026 04 PM PDT 25.30 394 - Normal
04/24/2026 05 PM PDT 25.29 391 - Normal
04/24/2026 06 PM PDT 25.28 388 - Normal
04/24/2026 07 PM PDT 25.28 388 0 Normal
04/24/2026 08 PM PDT 25.27 385 - Normal
04/24/2026 09 PM PDT 25.27 385 0 Normal
04/24/2026 10 PM PDT 25.26 382 - Normal
04/24/2026 11 PM PDT 25.26 382 0 Normal
04/25/2026 12 AM PDT 25.25 379 - Normal
04/25/2026 01 AM PDT 25.25 379 0 Normal
04/25/2026 02 AM PDT 25.24 375 - Normal
04/25/2026 03 AM PDT 25.23 372 - Normal
04/25/2026 04 AM PDT 25.23 372 0 Normal
04/25/2026 05 AM PDT 25.22 369 - Normal
04/25/2026 06 AM PDT 25.22 369 0 Normal
04/25/2026 07 AM PDT 25.22 369 0 Normal
04/25/2026 08 AM PDT 25.21 366 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/25/2026 09 AM PDT 25.21 366 Normal
04/25/2026 10 AM PDT 25.21 366 0 Normal
04/25/2026 11 AM PDT 25.21 366 0 Normal
04/25/2026 12 PM PDT 25.21 366 0 Normal
04/25/2026 01 PM PDT 25.21 366 0 Normal
04/25/2026 02 PM PDT 25.21 366 0 Normal
04/25/2026 03 PM PDT 25.20 363 - Normal
04/25/2026 04 PM PDT 25.20 363 0 Normal
04/25/2026 05 PM PDT 25.20 363 0 Normal
04/25/2026 06 PM PDT 25.20 363 0 Normal
04/25/2026 07 PM PDT 25.20 363 0 Normal
04/25/2026 08 PM PDT 25.19 360 - Normal
04/25/2026 09 PM PDT 25.19 360 0 Normal
04/25/2026 10 PM PDT 25.18 357 - Normal
04/25/2026 11 PM PDT 25.18 357 0 Normal
04/26/2026 12 AM PDT 25.18 357 0 Normal
04/26/2026 01 AM PDT 25.18 357 0 Normal
04/26/2026 02 AM PDT 25.17 354 - Normal
04/26/2026 03 AM PDT 25.17 354 0 Normal
04/26/2026 04 AM PDT 25.16 351 - Normal
04/26/2026 05 AM PDT 25.16 351 0 Normal
04/26/2026 06 AM PDT 25.16 351 0 Normal
04/26/2026 07 AM PDT 25.16 351 0 Normal
04/26/2026 08 AM PDT 25.15 348 - Normal
04/26/2026 09 AM PDT 25.15 348 0 Normal
04/26/2026 10 AM PDT 25.15 348 0 Normal
04/26/2026 11 AM PDT 25.14 345 - Normal
04/26/2026 12 PM PDT 25.14 345 0 Normal
04/26/2026 01 PM PDT 25.14 345 0 Normal
04/26/2026 02 PM PDT 25.13 342 - Normal
04/26/2026 03 PM PDT 25.13 342 0 Normal
04/26/2026 04 PM PDT 25.13 342 0 Normal
04/26/2026 05 PM PDT 25.12 339 - Normal
04/26/2026 06 PM PDT 25.12 339 0 Normal
04/26/2026 07 PM PDT 25.12 339 0 Normal
04/26/2026 08 PM PDT 25.11 336 - Normal
04/26/2026 09 PM PDT 25.11 336 0 Normal
04/26/2026 10 PM PDT 25.11 336 0 Normal
04/26/2026 11 PM PDT 25.10 334 - Normal
04/27/2026 12 AM PDT 25.10 334 0 Normal
04/27/2026 01 AM PDT 25.10 334 0 Normal
04/27/2026 02 AM PDT 25.09 331 - Normal
04/27/2026 03 AM PDT 25.09 331 0 Normal
04/27/2026 04 AM PDT 25.09 331 0 Normal
04/27/2026 05 AM PDT 25.08 328 - Normal
04/27/2026 06 AM PDT 25.08 328 0 Normal
04/27/2026 07 AM PDT 25.07 325 - Normal
04/27/2026 08 AM PDT 25.06 322 - Normal
04/27/2026 09 AM PDT 25.06 322 0 Normal
04/27/2026 10 AM PDT 25.05 319 - Normal
04/27/2026 11 AM PDT 25.05 319 0 Normal
04/27/2026 12 PM PDT 25.04 316 - Normal
04/27/2026 01 PM PDT 25.03 313 - Normal
04/27/2026 02 PM PDT 25.03 313 0 Normal
04/27/2026 03 PM PDT 25.02 310 - Normal
04/27/2026 04 PM PDT 25.02 310 0 Normal
04/27/2026 05 PM PDT 25.02 310 0 Normal
04/27/2026 06 PM PDT 25.02 310 0 Normal
04/27/2026 07 PM PDT 25.01 308 - Normal
04/27/2026 08 PM PDT 25.01 308 0 Normal
04/27/2026 09 PM PDT 25.01 308 0 Normal
04/27/2026 10 PM PDT 25.00 305 - Normal
04/27/2026 11 PM PDT 25.00 305 0 Normal
04/28/2026 12 AM PDT 25.00 305 0 Normal
04/28/2026 01 AM PDT 25.00 305 0 Normal
04/28/2026 02 AM PDT 25.00 305 0 Normal
04/28/2026 03 AM PDT 24.99 302 - Normal
04/28/2026 04 AM PDT 24.99 302 0 Normal
04/28/2026 05 AM PDT 24.99 302 0 Normal
04/28/2026 06 AM PDT 24.99 302 0 Normal
04/28/2026 07 AM PDT 24.98 299 - Normal
04/28/2026 08 AM PDT 24.98 299 0 Normal
04/28/2026 09 AM PDT 24.98 299 0 Normal
04/28/2026 10 AM PDT 24.98 299 0 Normal
04/28/2026 11 AM PDT 24.98 299 0 Normal
04/28/2026 12 PM PDT 24.97 296 - Normal
04/28/2026 01 PM PDT 24.97 296 0 Normal
04/28/2026 02 PM PDT 24.97 296 0 Normal
04/28/2026 03 PM PDT 24.97 296 0 Normal
04/28/2026 04 PM PDT 24.96 294 - Normal
04/28/2026 05 PM PDT 24.96 294 0 Normal
04/28/2026 06 PM PDT 24.96 294 0 Normal
04/28/2026 07 PM PDT 24.96 294 0 Normal
04/28/2026 08 PM PDT 24.96 294 0 Normal
04/28/2026 09 PM PDT 24.96 294 0 Normal
04/28/2026 10 PM PDT 24.95 291 - Normal
04/28/2026 11 PM PDT 24.95 291 0 Normal
04/29/2026 12 AM PDT 24.95 291 0 Normal
04/29/2026 01 AM PDT 24.95 291 0 Normal
04/29/2026 02 AM PDT 24.95 291 0 Normal
04/29/2026 03 AM PDT 24.95 291 0 Normal
04/29/2026 04 AM PDT 24.95 291 0 Normal
04/29/2026 05 AM PDT 24.95 291 0 Normal
04/29/2026 06 AM PDT 24.94 288 - Normal
04/29/2026 07 AM PDT 24.94 288 0 Normal
04/29/2026 08 AM PDT 24.94 288 0 Normal
04/29/2026 09 AM PDT 24.94 288 0 Normal
04/29/2026 10 AM PDT 24.94 288 0 Normal
04/29/2026 11 AM PDT 24.94 288 0 Normal
04/29/2026 12 PM PDT 24.94 288 0 Normal
04/29/2026 01 PM PDT 24.93 285 - Normal
04/29/2026 02 PM PDT 24.93 285 0 Normal
04/29/2026 03 PM PDT 24.93 285 0 Normal
04/29/2026 04 PM PDT 24.93 285 0 Normal
04/29/2026 05 PM PDT 24.93 285 0 Normal
04/29/2026 06 PM PDT 24.93 285 0 Normal
04/29/2026 07 PM PDT 24.93 285 0 Normal
04/29/2026 08 PM PDT 24.93 285 0 Normal
04/29/2026 09 PM PDT 24.93 285 0 Normal
04/29/2026 10 PM PDT 24.92 283 - Normal
04/29/2026 11 PM PDT 24.92 283 0 Normal
04/30/2026 12 AM PDT 24.92 283 0 Normal
04/30/2026 01 AM PDT 24.92 283 0 Normal
04/30/2026 02 AM PDT 24.92 283 0 Normal
04/30/2026 03 AM PDT 24.92 283 0 Normal
04/30/2026 04 AM PDT 24.92 283 0 Normal
04/30/2026 05 AM PDT 24.92 283 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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