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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via, as described in the StoryMap here.

Hydrograph River at a Glance Download
South Boulder Creek (CO) below Eldorado Springs Stage (ft)Observed: 1.03 ft at 11:36PM Sep 18, 2023Highest Observation: 1.13 ft at 11:20AM Sep 19, 2023Observed: 1.1 ft at 11:34AM Sep 19, 2023Observed: 1.04 ft at 11:32PM Sep 19, 2023Observed: 1.04 ft at 11:30AM Sep 20, 2023Observed: 1.03 ft at 11:28PM Sep 20, 2023Observed: 1.04 ft at 11:26AM Sep 21, 2023Observed: 1.03 ft at 11:24PM Sep 21, 2023Observed: 1.04 ft at 11:23AM Sep 22, 2023Observed: 0.97 ft at 11:21PM Sep 22, 2023Observed: 1.01 ft at 11:18AM Sep 23, 2023MHFDSSOC2(plotting HGIRZ) Graph Created (10:00PM Sep 23, 2023)ObservedLatest observed value: 1.01 ft at 11:18 AM MDT 23-Sep-2023. Flood Stage is 4 ft
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Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
NOTE: Forecasts are not available for the South Boulder Creek (CO) below Eldorado Springs. Only observed stages are available for this point.
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Upstream Gauge - above Eldorado Springs Upstream Gauge Downstream Gauge Downstream Gauge - below Boulder
Flood Categories (in feet)
Major Flood Stage: 5
Moderate Flood Stage: 4.5
Flood Stage: 4
Action Stage: 3.5
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

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Zoom Level:15
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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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Latitude: 39.958000° N, Longitude: 105.236000° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 4 ft 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 5470 5474 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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Observations provided by the Mile High Flood District
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Hydrologic Resources Additional Resources
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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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