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Hydrograph River at a Glance Download
Big Thompson River (CO) at Lake Estes Inflow Discharge (cfs)Highest Forecast: 209 cfs 6:00AM May 10, 2021Forecast: 193 cfs 12:00PM May 10, 2021Forecast: 177 cfs 6:00PM May 10, 2021Forecast: 167 cfs 12:00AM May 11, 2021Forecast: 158 cfs 6:00AM May 11, 2021Forecast: 151 cfs 12:00PM May 11, 2021Forecast: 147 cfs 6:00PM May 11, 2021Forecast: 144 cfs 12:00AM May 12, 2021Forecast: 139 cfs 6:00AM May 12, 2021Forecast: 133 cfs 12:00PM May 12, 2021Forecast: 135 cfs 6:00PM May 12, 2021Forecast: 135 cfs 12:00AM May 13, 2021Forecast: 129 cfs 6:00AM May 13, 2021Forecast: 124 cfs 12:00PM May 13, 2021Forecast: 135 cfs 6:00PM May 13, 2021Forecast: 160 cfs 12:00AM May 14, 2021Forecast: 186 cfs 6:00AM May 14, 2021ESSC2(plotting QIIRZ) Graph Created (2:45AM May 10, 2021)Forecast (issued 8:04AM May 9)
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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.

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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: 2-Nov-2020 7:28 PM
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