Skip Navigation Link weather.gov  
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 Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
     Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

Web Portal Changes:

Please visit https://www.weather.gov/owp/operations for more information.



Hydrograph River at a Glance Download
North Saint Vrain Creek (CO) above Lyons Stage (ft)Flow (cfs)Observed: 5.95 ft at 6:24AM Apr 13, 2024Observed: 5.3 ft at 7:24AM Apr 13, 2024Observed: 5.94 ft at 5:24PM Apr 13, 2024Observed: 5.94 ft at 7:24PM Apr 13, 2024Observed: 5.94 ft at 8:24PM Apr 13, 2024Observed: 5.95 ft at 11:24PM Apr 13, 2024Observed: 5.95 ft at 12:24AM Apr 14, 2024Observed: 5.95 ft at 1:24AM Apr 14, 2024Observed: 5.95 ft at 2:24AM Apr 14, 2024Observed: 5.96 ft at 5:24AM Apr 14, 2024Observed: 5.94 ft at 11:24AM Apr 14, 2024Observed: 5.94 ft at 12:24PM Apr 14, 2024Observed: 5.94 ft at 1:24PM Apr 14, 2024Observed: 5.94 ft at 4:24PM Apr 14, 2024Observed: 5.93 ft at 5:24PM Apr 14, 2024Observed: 5.93 ft at 9:24PM Apr 14, 2024Highest Observation: 6.28 ft at 12:24AM Apr 15, 2024Observed: 5.95 ft at 2:24AM Apr 15, 2024Observed: 5.96 ft at 5:24AM Apr 15, 2024Observed: 5.95 ft at 6:24AM Apr 15, 2024Observed: 5.98 ft at 1:24PM Apr 15, 2024Observed: 5.94 ft at 5:24PM Apr 15, 2024Observed: 5.95 ft at 6:24PM Apr 15, 2024Observed: 5.95 ft at 7:24PM Apr 15, 2024Observed: 5.94 ft at 8:24PM Apr 15, 2024Observed: 5.94 ft at 12:24AM Apr 16, 2024Observed: 5.94 ft at 2:24AM Apr 16, 2024Observed: 5.95 ft at 3:24AM Apr 16, 2024Observed: 5.95 ft at 4:24AM Apr 16, 2024Observed: 5.95 ft at 5:24AM Apr 16, 2024Observed: 5.95 ft at 7:24AM Apr 16, 2024Observed: 5.95 ft at 10:24AM Apr 16, 2024Observed: 6.02 ft at 12:24PM Apr 16, 2024Observed: 5.92 ft at 1:24PM Apr 16, 2024Observed: 5.94 ft at 2:24AM Apr 17, 2024Observed: 5.94 ft at 3:24AM Apr 17, 2024Observed: 5.94 ft at 4:24AM Apr 17, 2024Observed: 5.94 ft at 7:24AM Apr 17, 2024Observed: 5.93 ft at 5:24PM Apr 17, 2024Observed: 5.92 ft at 6:24PM Apr 17, 2024Observed: 5.93 ft at 8:24PM Apr 17, 2024Observed: 5.93 ft at 9:24PM Apr 17, 2024Observed: 5.93 ft at 10:24PM Apr 17, 2024Observed: 5.93 ft at 11:23PM Apr 17, 2024Observed: 5.93 ft at 12:23AM Apr 18, 2024Observed: 5.94 ft at 1:23AM Apr 18, 2024Observed: 5.95 ft at 2:23AM Apr 18, 2024Observed: 5.96 ft at 3:23AM Apr 18, 2024Observed: 5.96 ft at 4:23AM Apr 18, 2024MHFDNSVC2(plotting HGIRZ) Graph Created (6:00AM Apr 18, 2024)ObservedLatest observed value: 5.96 ft at 4:23 AM MDT 18-Apr-2024. Flood Stage is 10.5 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Stage data may not be available during winter months.

NOTE: Forecasts are not available for the North Saint Vrain Creek (CO) above Lyons. Only observed stages are available for this point.

Return to Area Map
Downstream Gauge Downstream Gauge - at Lyons
Flood Categories (in feet)
Major Flood Stage: 11.5
Moderate Flood Stage: 11
Flood Stage: 10.5
Action Stage: 10
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 www.floodsmart.gov.
Zoom Level:12
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
5.5 FLOODING AT THE ROCK'N RIVER BED AND BREAKFAST INN AT HIGHWAY 36. CONSIDERABLE OVERBANK FLOW ALONG REACH
4 WATER INTO LOW LYING AREAS
About This Location Collapse

Latitude: 40.248100° N, Longitude: 105.297500° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 10.5 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(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 5560 5570.5 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 in cooperation with Boulder County
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 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities