Skip Navigation Link  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap


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: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Hydrograph River at a Glance Download
Leyden Creek (CO) at Leyden Reservoir Stage (ft)Observed: 88.02 ft at 11:14AM Sep 28, 2023Observed: 88.12 ft at 3:10PM Sep 28, 2023Observed: 88.11 ft at 11:14PM Sep 28, 2023Observed: 88.01 ft at 8:18AM Sep 29, 2023Observed: 88.01 ft at 11:14AM Sep 29, 2023Observed: 88.12 ft at 4:26PM Sep 29, 2023Observed: 88.08 ft at 11:14PM Sep 29, 2023Observed: 87.99 ft at 11:14AM Sep 30, 2023Observed: 88.1 ft at 2:24PM Sep 30, 2023Observed: 88.07 ft at 11:14PM Sep 30, 2023Observed: 87.96 ft at 9:38AM Oct 01, 2023Observed: 88.01 ft at 11:14AM Oct 01, 2023Observed: 88.13 ft at 4:00PM Oct 01, 2023Observed: 88.02 ft at 4:36PM Oct 01, 2023Observed: 88.13 ft at 6:24PM Oct 01, 2023Observed: 88.03 ft at 10:10PM Oct 01, 2023Observed: 88.05 ft at 11:14PM Oct 01, 2023Observed: 88.04 ft at 11:14AM Oct 02, 2023Highest Observation: 88.15 ft at 11:56AM Oct 02, 2023Observed: 87.99 ft at 12:10PM Oct 02, 2023Observed: 88.1 ft at 12:34PM Oct 02, 2023Observed: 88.09 ft at 11:14PM Oct 02, 2023MHFDLEYC2(plotting HGIRZ) Graph Created (5:30AM Oct 3, 2023)ObservedLatest observed value: 88.09 ft at 11:14 PM MDT 2-Oct-2023. Flood Stage is 107.8 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
NOTE: Stage data may not be available during winter months.

NOTE: Forecasts are not available for the Leyden Creek (CO) at Leyden Reservoir. Only observed stages are available for this point.

Return to Area Map
Downstream Gauge Downstream Gauge - at Arvada
Flood Categories (in feet)
Major Flood Stage: 108.21
Moderate Flood Stage: 108.1
Flood Stage: 107.8
Action Stage: 106.8
Low Stage (in feet): -9999

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

Zoom Level:14
KML Image
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.
About This Location Collapse

Latitude: 39.840000° N, Longitude: 105.167200° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 107.8 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 5603 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
Additional Information Collapse
Observations provided by the Mile High Flood District
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:28 PM
Privacy Policy
About Us
Career Opportunities