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
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).
View USGS Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2018
3,320
5.76
Apr 7, 2018
 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
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.
Official 7 Day National Weather Service Forecast   (CAZ073)
Today: Heavy snow in the morning, then chance of heavy snow in the afternoon. Blowing snow through the day. Visibility one quarter mile or less at times. Snow level rising to 6000 feet. Snow accumulation of 6 to 12 inches. Highs 37 to 47. Southwest winds 25 to 35 mph with gusts up to 55 mph. Ridge gusts up to 105 mph.

Tonight: Heavy snow. Blowing snow. Visibility one quarter mile or less at times. Snow accumulation of 3 to 9 inches with 14 to 22 inches above 7000 feet. Lows 18 to 28. Southwest winds 25 to 35 mph with gusts up to 55 mph. Ridge gusts up to 120 mph.

Saturday: Heavy snow. Blowing snow. Visibility one quarter mile or less at times. Snow accumulation of 3 to 7 inches with 9 to 17 inches above 7000 feet. Highs 29 to 39. Southwest winds 25 to 35 mph with gusts up to 55 mph. Ridge gusts up to 125 mph decreasing to 110 mph in the afternoon.

Saturday Night: Heavy snow. Blowing snow. Visibility one quarter mile or less at times. Lows 14 to 24. Southwest winds 20 to 30 mph with gusts up to 50 mph. Ridge gusts up to 105 mph.

Sunday: Mostly cloudy with a chance of snow. Blowing snow in the morning. Patchy blowing snow in the afternoon. Visibility one quarter mile or less at times. Highs 28 to 38. Southwest winds 15 to 25 mph with gusts up to 45 mph. Ridge gusts up to 95 mph decreasing to 75 mph in the afternoon.

Sunday Night: Partly cloudy. Slight chance of snow in the evening. Patchy blowing snow through the night. Lows 5 to 15.

Monday and Monday Night: Partly cloudy. Highs 31 to 41. Lows 11 to 21.

Tuesday: Mostly cloudy in the morning then becoming partly cloudy. Slight chance of snow. Highs 35 to 45.

Tuesday Night: Mostly cloudy with a slight chance of snow. Lows 13 to 23.

Wednesday: Mostly cloudy in the morning then becoming partly cloudy. Chance of snow. Highs 35 to 45.

Wednesday Night: Mostly cloudy with a chance of snow. Lows 11 to 21.

Thursday: Partly cloudy with a slight chance of snow. Highs 32 to 42.
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.