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 - BELOW LITTLE WALKER RIVER NEAR COLEVILLE (WWBC1)
Latitude: 38.38º NLongitude: 119.45º WElevation: 6591 Feet
Location: Mono County in CaliforniaBulletin Group: Eastern SierraRiver Group: Eastern Sierra
Issuance Time: Jul 22 2024 at 7:33 AM PDTNext Issuance: Jul 23 2024 at 9:00 AM PDT
Monitor Stage: 5.5 FeetFlood Stage: 6.0 Feet

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2023
3,820
6.67
Jun 19, 2023
2022
3,030
6.05
Oct 25, 2021
2021
909
3.65
May 7, 2021
2020
1,300
4.19
Apr 29, 2020
2019
2,970
6.16
Jun 7, 2019
 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
Impacts - E19 Information
10.5 FeetIncredible flood disaster with massive and uncertain impacts in excess of the January 1997 event.
10.0 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. Near this flow in January 1997 a 6.5-mile stretch of Highway 395 completely scoured with debris from the canyon deposited in the town of Walker.
9.5 FeetNear record flooding. Area cut off as most transportation routes into area destroyed or flooded. Massive destruction of infrastructure and economy including utilities, roads, business, homes, etc.
8.5 FeetFlood disaster from Walker River Canyon through Antelope Valley. Widespread flood damage to roads, bridges, homes and structures along river. Severe damage to Highway 395 in W Walker River Canyon with the highway likely closed. Historically this flow has been exceeded only once in January 1997.
8.0 FeetFlooding near disaster levels in the West Walker Canyon and in Antelope Valley. Numerous structures flooded and roads washed out. Sections of Highway 395 likely destroyed in West Walker Canyon. Major damage to agricutural land due to erosion and destroyed diversion dams, headgates, canals and levees. Similar to the 2nd highest flood of record in November of 1950, and only exceeded in January 1997.
7.3 FeetMajor flooding in the West Walker River Canyon and in Antelope Valley including Walker, Coleville and Topaz California. Many buildings flooded and roads washed out. Major damage to agricultural lands. Extensive sandbagging required to protect propery. Transportiation affected. Damage to Highway 395 in the West Walker Canyon likely. Similar to the 4th highest peak flow in the 85 year gage record.
6.8 FeetModerate flooding of lowlands, agricultural land, yards, basements and rural roads in the West Walker River Canyon and in Antelope Valley including Walker, Coleville and Topaz California. Flooding of structures limited although some sandbagging necessary Roughly similar, but slightly below the June 2017 peak.
6.5 FeetExpanding minor flooding of lowlands, pastures and some rural roads between the West Walker River Canyon and Topaz Lake, including Walker Coleville and Topaz California. Out of bank flows may cause significant erosion of agricuturural lands. Similar to the peak of June 2023.
6.0 FeetFlood stage. Minor flooding of lowlands pasture & rural roads in Antelope Valley including Walker, Coleville and Topaz California. Roughly similar to June 2019 and October 2021 crests.
5.5 FeetMonitor Stage, No flooding in reach from West Walker River Canyon through Antelope Valley CA including Walker, Coleville, Topaz CA.
Official 7 Day National Weather Service Forecast   (CAZ073)
Today: Sunny in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs 82 to 92. Light winds becoming west around 10 mph in the afternoon.

Tonight: Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy with a slight chance of showers after midnight. Lows 49 to 59. West winds 10 to 15 mph.

Wednesday: Slight chance of showers and thunderstorms in the morning, then showers likely and chance of thunderstorms in the afternoon. Highs 80 to 90. Light winds becoming west around 10 mph in the afternoon.

Wednesday Night: Mostly cloudy with a chance of showers and thunderstorms in the evening, then clear after midnight. Lows 47 to 57. West winds 10 to 15 mph.

Thursday: Sunny in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs 80 to 90. Light winds becoming southwest around 10 mph in the afternoon.

Thursday Night: Clear. Lows 45 to 55.

Friday through Monday: Clear. Highs 78 to 88. Lows 39 to 49.
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.