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Hydrograph River at a Glance Download
Big Thompson River (CO) at Lake Estes Inflow Discharge (cfs)Highest Forecast: 32 cfs 6:00PM Oct 30, 2020Highest Forecast: 32 cfs 12:00AM Oct 31, 2020Forecast: 27 cfs 6:00AM Oct 31, 2020Forecast: 23 cfs 12:00PM Oct 31, 2020Forecast: 23 cfs 6:00PM Oct 31, 2020Forecast: 23 cfs 12:00AM Nov 01, 2020Forecast: 21 cfs 5:00AM Nov 01, 2020Forecast: 20 cfs 11:00AM Nov 01, 2020Forecast: 21 cfs 5:00PM Nov 01, 2020Forecast: 23 cfs 11:00PM Nov 01, 2020Forecast: 23 cfs 5:00AM Nov 02, 2020Forecast: 21 cfs 11:00AM Nov 02, 2020Forecast: 24 cfs 5:00PM Nov 02, 2020Forecast: 26 cfs 11:00PM Nov 02, 2020Forecast: 25 cfs 5:00AM Nov 03, 2020Forecast: 24 cfs 11:00AM Nov 03, 2020Forecast: 25 cfs 5:00PM Nov 03, 2020Forecast: 27 cfs 11:00PM Nov 03, 2020Forecast: 25 cfs 5:00AM Nov 04, 2020ESSC2(plotting QIIRZ) Graph Created (2:00PM Oct 30, 2020)Forecast (issued 8:06AM Oct 30)
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Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
NOTE: Forecasts for the Big Thompson River (CO) at Lake Estes are issued routinely year-round.
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Downstream Gauge Downstream Gauge - below Lake Estes
Flood Categories (in KCFS)
Not Available

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

For more information on your flood risk go to

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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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Latitude: 40.375556° N, Longitude: 105.487778° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS flow Not Available 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 7492 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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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
National Weather Service
Denver/Boulder Weather Forecast Office
325 Broadway
Boulder, CO 80305-3328
(303) 494-4221
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Page last modified: 1-Mar-2019 12:33 AM
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