CNRFC - Hydrology - River Guidance - Tabular Data

*** IMPORTANT *** Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

Location:

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KLAMATHRUSNAPSOUTHBAYSALINASSOCALSANDIEGOUPRSACLWRSACFTHRYUBAAMERICANCAPUTAHTULARESANJOAQNSANJOAQESIERRAHUMBOLDT = window.location.search; = new URLSearchParams(queryString); = window.location.href.split('?')[0] + "?" + urlParams.toString(); class="head">WALKER RIVER - MASON AT SNYDER LANE (MASN2)
Latitude: 38.92º N Longitude: 119.19º W Elevation: 4420 Feet
Location: Lyon County in Nevada Bulletin Group: Eastern Sierra River Group: Eastern Sierra
Issuance Time: Jun 05 2025 at 7:45 AM PDT Next Issuance: Jun 06 2025 at 9:00 AM PDT width="16%">
Action/Monitor: 9.0 Feet Minor Flood: 9.8 Feet Moderate Flood: 11.0 Feet Major Flood: 11.6 Feet
Please Note: Significant losses can occur in the Mason Valley upstream of the Mason stream gage. Increased forecast uncertainty exists in the long range forecast due to these unknown losses.

# Tabular Observed and Forecast Hydrograph Information River - Mason at Snyder Lane (MASN2) 06/05/2025 at 07:45 AM PDT Date & Time of Maximum Observed: 06/03/2025 at 08:00 PM PDT 4.98 Feet 312 cfs & Time of Maximum Forecast: 06/06/2025 at 10:00 AM PDT 4.91 Feet 294 cfs Stage (Feet) Flow (cfs) Trend Observed Status ------------------------------------------------------------- 4.90 291 Normal 4.91 294 + Normal 4.90 291 - Normal 4.91 294 + Normal 4.91 294 0 Normal 4.90 291 - Normal 4.92 296 + Normal 4.92 296 0 Normal 4.93 299 + Normal 4.92 296 - Normal 4.91 294 - Normal 4.89 289 - Normal 4.87 284 - Normal 4.86 281 - Normal 4.87 284 + Normal 4.88 286 + Normal 4.87 284 - Normal 4.88 286 + Normal 4.89 289 + Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.90 291 + Normal 4.91 294 + Normal 4.90 291 - Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.89 289 - Normal 4.89 289 0 Normal 4.88 286 - Normal 4.88 286 0 Normal 4.87 284 - Normal 4.87 284 0 Normal 4.86 281 - Normal 4.86 281 0 Normal 4.85 279 - Normal 4.84 276 - Normal 4.84 276 0 Normal 4.84 276 0 Normal 4.84 276 0 Normal 4.84 276 0 Normal 4.83 274 - Normal 4.85 279 + Normal 4.84 276 - Normal 4.84 276 0 Normal 4.84 276 0 Normal 4.84 276 0 Normal 4.86 281 + Normal 4.85 279 - Normal 4.85 279 0 Normal 4.86 281 + Normal 4.87 284 + Normal 4.87 284 0 Normal 4.88 286 + Normal 4.90 291 + Normal 4.91 294 + Normal 4.91 294 0 Normal 4.89 289 - Normal 4.88 286 - Normal 4.87 284 - Normal 4.87 284 0 Normal 4.87 284 0 Normal 4.88 286 + Normal 4.88 286 0 Normal 4.88 286 0 Normal 4.87 284 - Normal 4.88 286 + Normal 4.88 286 0 Normal 4.89 289 + Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.90 291 + Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.92 296 + Normal 4.92 296 0 Normal 4.91 294 - Normal 4.93 299 + Normal 4.94 302 + Normal 4.94 302 0 Normal 4.95 304 + Normal 4.96 307 + Normal 4.95 304 - Normal 4.96 307 + Normal 4.98 312 + Normal 4.97 309 - Normal 4.95 304 - Normal 4.95 304 0 Normal 4.94 302 - Normal 4.93 299 - Normal 4.93 299 0 Normal 4.93 299 0 Normal 4.95 304 + Normal 4.95 304 0 Normal 4.94 302 - Normal 4.96 307 + Normal 4.96 307 0 Normal 4.96 307 0 Normal 4.96 307 0 Normal 4.97 309 + Normal 4.95 304 - Normal 4.94 302 - Normal 4.93 299 - Normal 4.92 296 - Normal 4.92 296 0 Normal 4.91 294 - Normal 4.91 294 0 Normal 4.92 296 + Normal 4.91 294 - Normal 4.90 291 - Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.91 294 + Normal 4.90 291 - Normal 4.89 289 - Normal 4.88 286 - Normal 4.88 286 0 Normal 4.89 289 + Normal 4.89 289 0 Normal 4.89 289 0 Normal Stage (Feet) Flow (cfs) Trend Forecast Status ------------------------------------------------------------- 4.89 289 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.89 289 0 Normal 4.90 291 + Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.91 294 + Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.90 291 - Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.90 291 0 Normal 4.91 294 + Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal 4.91 294 0 Normal Stages are rounded to the nearest hundredth (.01) of a foot. Flows are rounded to the nearest (1) cfs. Trends are determined using hourly change in unrounded stage and flow. Maximum Values are determined using unrounded stage and flow. End Web Content -->
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