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Hydrograph River at a Glance Download
Lake Chelan at Chelan Forebay Elevation (ft)Highest Observation: 1098.34 ft at 11:59PM Sep 21, 2021Observed: 1098.31 ft at 11:59PM Sep 22, 2021Observed: 1098.2 ft at 11:59PM Sep 23, 2021Observed: 1098.12 ft at 11:59PM Sep 24, 2021Observed: 1098.11 ft at 7:00AM Sep 25, 2021Observed: 1098.04 ft at 11:59PM Sep 25, 2021Observed: 1098.08 ft at 12:00AM Sep 26, 2021Observed: 1098.02 ft at 7:00AM Sep 26, 2021Observed: 1098.03 ft at 11:59PM Sep 26, 2021Observed: 1098.03 ft at 12:00AM Sep 27, 2021Observed: 1098.07 ft at 7:00AM Sep 27, 2021Observed: 1098 ft at 11:59PM Sep 27, 2021Observed: 1098.02 ft at 12:00AM Sep 28, 2021Forecast: 1098.16 ft 5:00AM Sep 28, 2021Highest Forecast: 1098.17 ft 11:00AM Sep 28, 2021Forecast: 1098.13 ft 5:00PM Sep 28, 2021Forecast: 1098.09 ft 11:00PM Sep 28, 2021Forecast: 1098.06 ft 5:00AM Sep 29, 2021Forecast: 1098.02 ft 11:00AM Sep 29, 2021Forecast: 1097.98 ft 5:00PM Sep 29, 2021Forecast: 1097.94 ft 11:00PM Sep 29, 2021Forecast: 1097.9 ft 5:00AM Sep 30, 2021Forecast: 1097.86 ft 11:00AM Sep 30, 2021Forecast: 1097.83 ft 5:00PM Sep 30, 2021Forecast: 1097.79 ft 11:00PM Sep 30, 2021Forecast: 1097.75 ft 5:00AM Oct 01, 2021Forecast: 1097.72 ft 11:00AM Oct 01, 2021Forecast: 1097.69 ft 5:00PM Oct 01, 2021Forecast: 1097.66 ft 11:00PM Oct 01, 2021Forecast: 1097.63 ft 5:00AM Oct 02, 2021Forecast: 1097.6 ft 11:00AM Oct 02, 2021Forecast: 1097.57 ft 5:00PM Oct 02, 2021Forecast: 1097.54 ft 11:00PM Oct 02, 2021Forecast: 1097.51 ft 5:00AM Oct 03, 2021Forecast: 1097.48 ft 11:00AM Oct 03, 2021Forecast: 1097.45 ft 5:00PM Oct 03, 2021Forecast: 1097.42 ft 11:00PM Oct 03, 2021Forecast: 1097.39 ft 5:00AM Oct 04, 2021Forecast: 1097.36 ft 11:00AM Oct 04, 2021Forecast: 1097.33 ft 5:00PM Oct 04, 2021Forecast: 1097.3 ft 11:00PM Oct 04, 2021USGS--Water Resources of the United StatesCHDW1(plotting HFIRX) Graph Created (3:01AM Sep 28, 2021)ObservedForecast (issued 3:22PM Sep 27)Latest observed value: 1098.02 ft at 12:00 AM PDT 28-Sep-2021.
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Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Gauge reading affected by reservoir operations.

NOTE: Forecasts for the Lake Chelan at Chelan are issued routinely year-round.

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Upstream Gauge - at Purple Point at Stehekin Upstream Gauge
Flood Categories (in feet)
Not Available

Historic Crests
(1) 1,100.16 ft on 06/30/1981
(2) 1,099.82 ft on 07/02/2021 (P)
(3) 1,099.81 ft on 07/09/2019
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(P): Preliminary values subject to further review.

Recent Crests
(1) 1,099.82 ft on 07/02/2021 (P)
(2) 1,099.78 ft on 07/28/2020
(3) 1,099.81 ft on 07/09/2019
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(P): Preliminary values subject to further review.

Low Water Records
(1) 1,079.68 ft on 04/03/1970
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Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
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6000 Flows in excess of 6000cfs may damage the stream restoration work in the Chelan River Gorge downstream of the Chelan Dam.
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Latitude: 47.836389° N, Longitude: 120.060278° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
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Spokane Weather Forecast Office
2601 N. Rambo Rd.
Spokane, WA 99224
(509) 244-0110
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Page last modified: 2-Nov-2020 7:27 PM
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