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WALKER RIVER - MASON AT SNYDER LANE (MASN2)
| Latitude: 38.92º N | Longitude: 119.19º W | Elevation: 4420 Feet | | Forecast Type: Official Location |
| Location: Lyon County in Nevada | Bulletin Group: Eastern Sierra | River Group: Eastern Sierra |
| Issuance Time: | May 18 2026 at 7:35 AM PDT | Next Issuance: | May 19 2026 at 9:00 AM PDT
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| Action/Monitor: 9.0 Feet | Minor Flood: 9.8 Feet | Moderate Flood: 11.0 Feet | Major Flood: 11.6 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Walker River - Mason at Snyder Lane (MASN2)
#
# File Generation Time: 05/18/2026 at 07:35 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 05/16/2026 at 01:00 AM PDT
# Maximum Observed Stage: 6.08 Feet
# Maximum Observed Flow: 573 cfs
#
# Earliest Date & Time of Maximum Forecast: 05/23/2026 at 05:00 AM PDT
# Maximum Forecast Stage: 5.38 Feet
# Maximum Forecast Flow: 376 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
05/13/2026 07 AM PDT 5.63 441 Normal
05/13/2026 08 AM PDT 5.67 452 + Normal
05/13/2026 09 AM PDT 5.69 458 + Normal
05/13/2026 10 AM PDT 5.70 460 + Normal
05/13/2026 11 AM PDT 5.72 466 + Normal
05/13/2026 12 PM PDT 5.74 472 + Normal
05/13/2026 01 PM PDT 5.75 474 + Normal
05/13/2026 02 PM PDT 5.75 474 0 Normal
05/13/2026 03 PM PDT 5.75 474 0 Normal
05/13/2026 04 PM PDT 5.74 472 - Normal
05/13/2026 05 PM PDT 5.73 469 - Normal
05/13/2026 06 PM PDT 5.72 466 - Normal
05/13/2026 07 PM PDT 5.71 463 - Normal
05/13/2026 08 PM PDT 5.72 466 + Normal
05/13/2026 09 PM PDT 5.73 469 + Normal
05/13/2026 10 PM PDT 5.72 466 - Normal
05/13/2026 11 PM PDT 5.75 474 + Normal
05/14/2026 12 AM PDT 5.76 477 + Normal
05/14/2026 01 AM PDT 5.77 480 + Normal
05/14/2026 02 AM PDT 5.80 489 + Normal
05/14/2026 03 AM PDT 5.82 494 + Normal
05/14/2026 04 AM PDT 5.85 503 + Normal
05/14/2026 05 AM PDT 5.86 506 + Normal
05/14/2026 06 AM PDT 5.89 515 + Normal
05/14/2026 07 AM PDT 5.92 524 + Normal
05/14/2026 08 AM PDT 5.95 533 + Normal
05/14/2026 09 AM PDT 5.96 536 + Normal
05/14/2026 10 AM PDT 5.99 545 + Normal
05/14/2026 11 AM PDT 5.98 542 - Normal
05/14/2026 12 PM PDT 5.98 542 0 Normal
05/14/2026 01 PM PDT 5.99 545 + Normal
05/14/2026 02 PM PDT 5.98 542 - Normal
05/14/2026 03 PM PDT 5.98 542 0 Normal
05/14/2026 04 PM PDT 5.97 539 - Normal
05/14/2026 05 PM PDT 5.97 539 0 Normal
05/14/2026 06 PM PDT 5.98 542 + Normal
05/14/2026 07 PM PDT 6.00 548 + Normal
05/14/2026 08 PM PDT 5.99 545 - Normal
05/14/2026 09 PM PDT 6.01 551 + Normal
05/14/2026 10 PM PDT 5.99 545 - Normal
05/14/2026 11 PM PDT 6.00 548 + Normal
05/15/2026 12 AM PDT 6.03 557 + Normal
05/15/2026 01 AM PDT 6.02 554 - Normal
05/15/2026 02 AM PDT 5.99 545 - Normal
05/15/2026 03 AM PDT 6.02 554 + Normal
05/15/2026 04 AM PDT 6.02 554 0 Normal
05/15/2026 05 AM PDT 6.01 551 - Normal
05/15/2026 06 AM PDT 6.00 548 - Normal
05/15/2026 07 AM PDT 6.02 554 + Normal
05/15/2026 08 AM PDT 6.02 554 0 Normal
05/15/2026 09 AM PDT 6.02 554 0 Normal
05/15/2026 10 AM PDT 6.04 560 + Normal
05/15/2026 11 AM PDT 6.03 557 - Normal
05/15/2026 12 PM PDT 6.05 563 + Normal
05/15/2026 01 PM PDT 6.06 566 + Normal
05/15/2026 02 PM PDT 6.06 566 0 Normal
05/15/2026 03 PM PDT 6.04 560 - Normal
05/15/2026 04 PM PDT 6.04 560 0 Normal
05/15/2026 05 PM PDT 6.02 554 - Normal
05/15/2026 06 PM PDT 6.03 557 + Normal
05/15/2026 07 PM PDT 6.03 557 0 Normal
05/15/2026 08 PM PDT 6.04 560 + Normal
05/15/2026 09 PM PDT 6.04 560 0 Normal
05/15/2026 10 PM PDT 6.07 570 + Normal
05/15/2026 11 PM PDT 6.05 563 - Normal
05/16/2026 12 AM PDT 6.07 570 + Normal
05/16/2026 01 AM PDT 6.08 573 + Normal
05/16/2026 02 AM PDT 6.07 570 - Normal
05/16/2026 03 AM PDT 6.04 560 - Normal
05/16/2026 04 AM PDT 6.03 557 - Normal
05/16/2026 05 AM PDT 6.02 554 - Normal
05/16/2026 06 AM PDT 6.02 554 0 Normal
05/16/2026 07 AM PDT 5.99 545 - Normal
05/16/2026 08 AM PDT 5.97 539 - Normal
05/16/2026 09 AM PDT 5.96 536 - Normal
05/16/2026 10 AM PDT 5.96 536 0 Normal
05/16/2026 11 AM PDT 5.94 530 - Normal
05/16/2026 12 PM PDT 5.93 527 - Normal
05/16/2026 01 PM PDT 5.93 527 0 Normal
05/16/2026 02 PM PDT 5.91 521 - Normal
05/16/2026 03 PM PDT 5.90 518 - Normal
05/16/2026 04 PM PDT 5.90 518 0 Normal
05/16/2026 05 PM PDT 5.89 515 - Normal
05/16/2026 06 PM PDT 5.88 512 - Normal
05/16/2026 07 PM PDT 5.87 509 - Normal
05/16/2026 08 PM PDT 5.86 506 - Normal
05/16/2026 09 PM PDT 5.86 506 0 Normal
05/16/2026 10 PM PDT 5.85 503 - Normal
05/16/2026 11 PM PDT 5.85 503 0 Normal
05/17/2026 12 AM PDT 5.83 497 - Normal
05/17/2026 01 AM PDT 5.79 486 - Normal
05/17/2026 02 AM PDT 5.75 474 - Normal
05/17/2026 03 AM PDT 5.70 460 - Normal
05/17/2026 04 AM PDT 5.66 449 - Normal
05/17/2026 05 AM PDT 5.61 436 - Normal
05/17/2026 06 AM PDT 5.57 425 - Normal
05/17/2026 07 AM PDT 5.55 419 - Normal
05/17/2026 08 AM PDT 5.53 414 - Normal
05/17/2026 09 AM PDT 5.51 409 - Normal
05/17/2026 10 AM PDT 5.49 404 - Normal
05/17/2026 11 AM PDT 5.48 401 - Normal
05/17/2026 12 PM PDT 5.48 401 0 Normal
05/17/2026 01 PM PDT 5.45 393 - Normal
05/17/2026 02 PM PDT 5.45 393 0 Normal
05/17/2026 03 PM PDT 5.44 391 - Normal
05/17/2026 04 PM PDT 5.43 388 - Normal
05/17/2026 05 PM PDT 5.43 388 0 Normal
05/17/2026 06 PM PDT 5.42 386 - Normal
05/17/2026 07 PM PDT 5.41 383 - Normal
05/17/2026 08 PM PDT 5.40 381 - Normal
05/17/2026 09 PM PDT 5.40 381 0 Normal
05/17/2026 10 PM PDT 5.39 378 - Normal
05/17/2026 11 PM PDT 5.38 376 - Normal
05/18/2026 12 AM PDT 5.38 376 0 Normal
05/18/2026 01 AM PDT 5.38 376 0 Normal
05/18/2026 02 AM PDT 5.38 376 0 Normal
05/18/2026 03 AM PDT 5.37 373 - Normal
05/18/2026 04 AM PDT 5.37 373 0 Normal
05/18/2026 05 AM PDT 5.36 371 - Normal
05/18/2026 06 AM PDT 5.36 371 0 Normal
05/18/2026 07 AM PDT 5.35 368 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
05/18/2026 08 AM PDT 5.35 368 Normal
05/18/2026 09 AM PDT 5.35 368 0 Normal
05/18/2026 10 AM PDT 5.34 366 - Normal
05/18/2026 11 AM PDT 5.34 366 0 Normal
05/18/2026 12 PM PDT 5.34 366 0 Normal
05/18/2026 01 PM PDT 5.34 366 0 Normal
05/18/2026 02 PM PDT 5.33 363 - Normal
05/18/2026 03 PM PDT 5.33 363 0 Normal
05/18/2026 04 PM PDT 5.33 363 0 Normal
05/18/2026 05 PM PDT 5.33 363 0 Normal
05/18/2026 06 PM PDT 5.33 363 0 Normal
05/18/2026 07 PM PDT 5.33 363 0 Normal
05/18/2026 08 PM PDT 5.33 363 0 Normal
05/18/2026 09 PM PDT 5.32 361 - Normal
05/18/2026 10 PM PDT 5.32 361 0 Normal
05/18/2026 11 PM PDT 5.32 361 0 Normal
05/19/2026 12 AM PDT 5.32 361 0 Normal
05/19/2026 01 AM PDT 5.31 358 - Normal
05/19/2026 02 AM PDT 5.31 358 0 Normal
05/19/2026 03 AM PDT 5.31 358 0 Normal
05/19/2026 04 AM PDT 5.30 356 - Normal
05/19/2026 05 AM PDT 5.30 356 0 Normal
05/19/2026 06 AM PDT 5.30 356 0 Normal
05/19/2026 07 AM PDT 5.30 356 0 Normal
05/19/2026 08 AM PDT 5.29 353 - Normal
05/19/2026 09 AM PDT 5.29 353 0 Normal
05/19/2026 10 AM PDT 5.29 353 0 Normal
05/19/2026 11 AM PDT 5.28 351 - Normal
05/19/2026 12 PM PDT 5.28 351 0 Normal
05/19/2026 01 PM PDT 5.28 351 0 Normal
05/19/2026 02 PM PDT 5.27 349 - Normal
05/19/2026 03 PM PDT 5.27 349 0 Normal
05/19/2026 04 PM PDT 5.26 346 - Normal
05/19/2026 05 PM PDT 5.26 346 0 Normal
05/19/2026 06 PM PDT 5.26 346 0 Normal
05/19/2026 07 PM PDT 5.25 344 - Normal
05/19/2026 08 PM PDT 5.25 344 0 Normal
05/19/2026 09 PM PDT 5.25 344 0 Normal
05/19/2026 10 PM PDT 5.24 341 - Normal
05/19/2026 11 PM PDT 5.24 341 0 Normal
05/20/2026 12 AM PDT 5.24 341 0 Normal
05/20/2026 01 AM PDT 5.23 339 - Normal
05/20/2026 02 AM PDT 5.23 339 0 Normal
05/20/2026 03 AM PDT 5.23 339 0 Normal
05/20/2026 04 AM PDT 5.23 339 0 Normal
05/20/2026 05 AM PDT 5.22 337 - Normal
05/20/2026 06 AM PDT 5.22 337 0 Normal
05/20/2026 07 AM PDT 5.22 337 0 Normal
05/20/2026 08 AM PDT 5.22 337 0 Normal
05/20/2026 09 AM PDT 5.22 337 0 Normal
05/20/2026 10 AM PDT 5.22 337 0 Normal
05/20/2026 11 AM PDT 5.21 334 - Normal
05/20/2026 12 PM PDT 5.21 334 0 Normal
05/20/2026 01 PM PDT 5.21 334 0 Normal
05/20/2026 02 PM PDT 5.21 334 0 Normal
05/20/2026 03 PM PDT 5.21 334 0 Normal
05/20/2026 04 PM PDT 5.21 334 0 Normal
05/20/2026 05 PM PDT 5.20 332 - Normal
05/20/2026 06 PM PDT 5.20 332 0 Normal
05/20/2026 07 PM PDT 5.20 332 0 Normal
05/20/2026 08 PM PDT 5.20 332 0 Normal
05/20/2026 09 PM PDT 5.20 332 0 Normal
05/20/2026 10 PM PDT 5.20 332 0 Normal
05/20/2026 11 PM PDT 5.20 332 0 Normal
05/21/2026 12 AM PDT 5.20 332 0 Normal
05/21/2026 01 AM PDT 5.20 332 0 Normal
05/21/2026 02 AM PDT 5.20 332 0 Normal
05/21/2026 03 AM PDT 5.20 332 0 Normal
05/21/2026 04 AM PDT 5.20 332 0 Normal
05/21/2026 05 AM PDT 5.20 332 0 Normal
05/21/2026 06 AM PDT 5.20 332 0 Normal
05/21/2026 07 AM PDT 5.20 332 0 Normal
05/21/2026 08 AM PDT 5.21 334 + Normal
05/21/2026 09 AM PDT 5.21 334 0 Normal
05/21/2026 10 AM PDT 5.21 334 0 Normal
05/21/2026 11 AM PDT 5.21 334 0 Normal
05/21/2026 12 PM PDT 5.21 334 0 Normal
05/21/2026 01 PM PDT 5.22 337 + Normal
05/21/2026 02 PM PDT 5.22 337 0 Normal
05/21/2026 03 PM PDT 5.22 337 0 Normal
05/21/2026 04 PM PDT 5.22 337 0 Normal
05/21/2026 05 PM PDT 5.23 339 + Normal
05/21/2026 06 PM PDT 5.23 339 0 Normal
05/21/2026 07 PM PDT 5.23 339 0 Normal
05/21/2026 08 PM PDT 5.23 339 0 Normal
05/21/2026 09 PM PDT 5.24 341 + Normal
05/21/2026 10 PM PDT 5.24 341 0 Normal
05/21/2026 11 PM PDT 5.24 341 0 Normal
05/22/2026 12 AM PDT 5.25 344 + Normal
05/22/2026 01 AM PDT 5.25 344 0 Normal
05/22/2026 02 AM PDT 5.26 346 + Normal
05/22/2026 03 AM PDT 5.26 346 0 Normal
05/22/2026 04 AM PDT 5.27 349 + Normal
05/22/2026 05 AM PDT 5.27 349 0 Normal
05/22/2026 06 AM PDT 5.28 351 + Normal
05/22/2026 07 AM PDT 5.29 353 + Normal
05/22/2026 08 AM PDT 5.29 353 0 Normal
05/22/2026 09 AM PDT 5.30 356 + Normal
05/22/2026 10 AM PDT 5.30 356 0 Normal
05/22/2026 11 AM PDT 5.31 358 + Normal
05/22/2026 12 PM PDT 5.31 358 0 Normal
05/22/2026 01 PM PDT 5.32 361 + Normal
05/22/2026 02 PM PDT 5.32 361 0 Normal
05/22/2026 03 PM PDT 5.32 361 0 Normal
05/22/2026 04 PM PDT 5.32 361 0 Normal
05/22/2026 05 PM PDT 5.33 363 + Normal
05/22/2026 06 PM PDT 5.33 363 0 Normal
05/22/2026 07 PM PDT 5.33 363 0 Normal
05/22/2026 08 PM PDT 5.33 363 0 Normal
05/22/2026 09 PM PDT 5.33 363 0 Normal
05/22/2026 10 PM PDT 5.34 366 + Normal
05/22/2026 11 PM PDT 5.34 366 0 Normal
05/23/2026 12 AM PDT 5.35 368 + Normal
05/23/2026 01 AM PDT 5.35 368 0 Normal
05/23/2026 02 AM PDT 5.36 371 + Normal
05/23/2026 03 AM PDT 5.37 373 + Normal
05/23/2026 04 AM PDT 5.37 373 0 Normal
05/23/2026 05 AM PDT 5.38 376 + 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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