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Web Portal Changes: In Spring 2024, the Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS) at a repurposed A preview of NWPS is available here, where you can see your station hydrograph by replacing SSSSS with the station 5-character id:

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Hydrograph River at a Glance Download
Lake Chelan at Chelan Forebay Elevation (ft)Observed: 1089.84 ft at 11:59PM Feb 24, 2024Observed: 1089.85 ft at 12:00AM Feb 25, 2024Observed: 1089.78 ft at 7:00AM Feb 25, 2024Highest Observation: 1089.89 ft at 11:59PM Feb 25, 2024Observed: 1089.86 ft at 12:00AM Feb 26, 2024Observed: 1089.85 ft at 7:00AM Feb 26, 2024Observed: 1089.78 ft at 11:59PM Feb 26, 2024Observed: 1089.85 ft at 12:00AM Feb 27, 2024Observed: 1089.76 ft at 7:00AM Feb 27, 2024Observed: 1089.74 ft at 11:59PM Feb 27, 2024Observed: 1089.75 ft at 12:00AM Feb 28, 2024Observed: 1089.74 ft at 7:00AM Feb 28, 2024Observed: 1089.65 ft at 11:59PM Feb 28, 2024Observed: 1089.72 ft at 12:00AM Feb 29, 2024Observed: 1089.71 ft at 7:00AM Feb 29, 2024Observed: 1089.67 ft at 11:59PM Feb 29, 2024Observed: 1089.68 ft at 12:00AM Mar 01, 2024Observed: 1089.65 ft at 7:00AM Mar 01, 2024Observed: 1089.65 ft at 11:59PM Mar 01, 2024Observed: 1089.65 ft at 12:00AM Mar 02, 2024Observed: 1089.68 ft at 7:00AM Mar 02, 2024Highest Forecast: 1089.64 ft 10:00PM Mar 02, 2024Forecast: 1089.63 ft 4:00AM Mar 03, 2024Forecast: 1089.61 ft 10:00AM Mar 03, 2024Forecast: 1089.6 ft 4:00PM Mar 03, 2024Forecast: 1089.59 ft 10:00PM Mar 03, 2024Forecast: 1089.58 ft 4:00AM Mar 04, 2024Forecast: 1089.56 ft 10:00AM Mar 04, 2024Forecast: 1089.55 ft 4:00PM Mar 04, 2024Forecast: 1089.53 ft 10:00PM Mar 04, 2024Forecast: 1089.51 ft 4:00AM Mar 05, 2024Forecast: 1089.49 ft 10:00AM Mar 05, 2024Forecast: 1089.47 ft 4:00PM Mar 05, 2024Forecast: 1089.46 ft 10:00PM Mar 05, 2024Forecast: 1089.44 ft 4:00AM Mar 06, 2024Forecast: 1089.42 ft 10:00AM Mar 06, 2024Forecast: 1089.4 ft 4:00PM Mar 06, 2024Forecast: 1089.38 ft 10:00PM Mar 06, 2024Forecast: 1089.36 ft 4:00AM Mar 07, 2024Forecast: 1089.34 ft 10:00AM Mar 07, 2024Forecast: 1089.32 ft 4:00PM Mar 07, 2024Forecast: 1089.31 ft 10:00PM Mar 07, 2024Forecast: 1089.29 ft 4:00AM Mar 08, 2024Forecast: 1089.27 ft 10:00AM Mar 08, 2024Forecast: 1089.25 ft 4:00PM Mar 08, 2024Forecast: 1089.23 ft 10:00PM Mar 08, 2024Forecast: 1089.21 ft 4:00AM Mar 09, 2024Forecast: 1089.19 ft 10:00AM Mar 09, 2024Forecast: 1089.17 ft 4:00PM Mar 09, 2024USGS--Water Resources of the United StatesCHDW1(plotting HFIRX) Graph Created (9:16PM Mar 2, 2024)ObservedForecast (issued 5:52PM Mar 2)Latest observed value: 1089.68 ft at 7:00 AM PST 2-Mar-2024.
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Tabular Data (UTC)
Tabular Data (PST)
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 near 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
(3) 1,099.81 ft on 07/09/2019
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(P): Preliminary values subject to further review.

Recent Crests
(1) 1,099.32 ft on 06/17/2023 (P)
(2) 1,099.53 ft on 08/03/2022
(3) 1,099.82 ft on 07/02/2021
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 1,079.68 ft on 04/03/1970
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Zoom Level:11
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Gauge LocationGauge Map Marker
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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If you notice any errors in the below information, please contact our Webmaster
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

Current/Historical Observations:

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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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