National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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WEST WALKER RIVER - HWY 395 BELOW LITTLE WALKER (WWBC1)
Latitude: 38.38º NLongitude: 119.45º WElevation: 6591 Feet
Location: Mono County in CaliforniaRiver Group: Eastern Sierra
Issuance Time: Jul 26 2021 at 7:49 AM PDTNext Issuance: Jul 27 2021 at 9:00 AM PDT
Monitor Stage: 5.5 FeetFlood Stage: 6.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
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Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2020
1,300
4.19
Apr 29, 2020
2019
2,970
6.16
Jun 7, 2019
2018
3,320
5.76
Apr 7, 2018
2017
4,260
6.95
Jun 20, 2017
2016
1,670
4.94
Jun 8, 2016
 Historical High Stage/Flow Events (Period of Record - Apr 1938 to Present) - Ranked by Flow
1997*
12,300
10.11
Jan 02, 1997
1951*
6,220
8.10
Nov 20, 1950
1938*
5,800
--
Dec 11, 1937
1956*
5,180
7.41
Dec 23, 1955
1996*
4,610
6.55
May 16, 1996
 * Numerous small gage location changes, some including datum changes, prior to Mar 1997.
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ073)
Tonight: Haze in the evening. Mostly cloudy with scattered showers and thunderstorms. Lows 45 to 55. Southwest winds around 10 mph in the evening becoming light.

Tuesday: Partly cloudy with a chance of showers and thunderstorms. Highs 76 to 86. Light winds becoming southwest around 10 mph in the afternoon.

Tuesday Night: Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 44 to 54. West winds around 10 mph in the evening becoming light.

Wednesday: Partly cloudy. Slight chance of showers in the morning, then scattered showers and chance of thunderstorms in the afternoon. Highs 75 to 85. Light winds becoming east around 10 mph in the afternoon.

Wednesday Night: Mostly cloudy with scattered showers and thunderstorms in the evening, then clear after midnight. Lows 43 to 53. West winds around 10 mph in the evening becoming light.

Thursday: Sunny in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs 77 to 87.

Thursday Night: Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 45 to 55.

Friday through Saturday Night: Mostly cloudy with a chance of showers and thunderstorms. Highs 75 to 85. Lows 42 to 52.

Sunday and Sunday Night: Partly cloudy with a chance of showers and thunderstorms. Highs 75 to 85. Lows 41 to 51.

Monday: Sunny. Highs 77 to 87.
Impacts - E19 Information
5.5 FeetMonitor stage. No flooding in reach from West Walker River Canyon through Antelope Valley CA, including Walker, Coleville, and Topaz CA.
6.0 FeetFlood Stage. Minor flooding of lowlands, pasture, and rural roads in West Walker River Canyon and Antelope Valley, including Walker, Coleville, and Topaz CA. Roughly similar to late May 2005, and slightly below peaks of June 2010 and May 2006.
6.5 FeetModerate flooding of lowlands, pasture, and some rural roads from the West Walker River Canyon to Topaz Lake, including Walker, Coleville, and Topaz CA. Similar to peak of June 2011, and slightly below the peak of June 2017.
7.0 FeetSignificant flooding of lowlands, agricultural land, yards, basements, rural roads in the West Walker River Canyon and in Antelope Valley, including Walker, Coleville, and Topaz CA. Flooding of structures limited although sandbagging necessary. Roughly similar to May 1996 flood, and slightly in excess of June 2017 peak.
7.3 FeetMajor flooding in the West Walker River Canyon and in Antelope Valley - Walker, Coleville, and Topaz CA. Many buildings, roads flooded and washed out, with major damage to agricultural lands. Extensive sandbagging required to protect property. Transportation affected. Severe damage to Highway 395 in West Walker Canyon possible.
7.5 FeetMajor flooding in the West Walker Canyon and in Antelope Valley - Walker, Coleville, and Topaz CA. Many buildings, roads flooded and washed out. Major damage to agricultural lands. Extensive sandbagging required to protect property. Transportation affected. Severe damage to Highway 395 in West Walker Canyon.
8.0 FeetFlooding near disaster levels in the West Walker Canyon and in Antelope Valley - Walker, Coleville, and Topaz CA. Numerous structures flooded and roads washed out. Many sections of Highway 395 destroyed in West Walker Canyon. Major damage to agricultural land due to erosion and destroyed facilities, diversion dams, headgates, canals, levees.
8.25 FeetFlood disaster in West Walker Canyon and in Antelope Valley. Widespread flood damage to roads, bridges, homes, and structures along river. Severe damage to Highway 395 in West Walker Canyon with highway likely closed. Historically this flow has been reached or exceeded only once in January 1997.
8.8 FeetFlood disaster from Walker River Canyon to Antelope Valley/Topaz Lake. Widespread flood damage to roads, bridges, homes, and structures along river. Severe damage to Highway 395 in West Walker River Canyon with the highway probably closed. Historically this flow has been exceeded only once, in January 1997.
9.5 FeetNear record flooding. Area cut off as most transportation routes into area destroyed/flooded. Massive destruction of infrastructure and economy including utilities, roads, business, homes, etc.
10.25 FeetFlood of record. Highway 395 in West Walker River Canyon closed for months. Massive destruction to infrastructure and economy including transportation, power, water, homes, businesses, etc. Area isolated. At this stage in January 1997, a 6.5 mile stretch of Highway 395 completely scoured with debris from canyon deposited in the town of Walker.
10.5 FeetIncredible flood disaster in excess of January 1997 event.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Reno Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.