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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 Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit for more information.

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.

DID YOU KNOW... Please try our new TEST hydrograph page link at: - Just replace “abcde” with your local hydrograph five character ID found in the lower left corner of the hydrograph.  In late March of 2024, the base URL path will become  Feedback can be provided HERE

Hydrograph River at a Glance Download
Cache La Poudre River (CO) at Greeley Stage (ft)Colorado Division of Water ResourcesGLYC2(plotting HGIRG) Graph Created (8:00AM Dec 2, 2023)ObservedFlood Stage is 8.5 ft
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Tabular Data (UTC)
Tabular Data (MST)
XML Data
RSS Files
Datum: NGVD29
NOTE: Stage may be affected by ice during winter months.

NOTE: Forecasts are not available for the Cache La Poudre River (CO) at Greeley. Only observed stages are available for this point.

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Upstream Gauge - at Fort Collins Upstream Gauge Downstream Gauge Downstream Gauge - near Greeley
Flood Categories (in feet)
Major Flood Stage: 10
Moderate Flood Stage: 9
Flood Stage: 8.5
Action Stage: 7.21
Low Stage (in feet): -9999

Historic Crests
(1) 8.73 ft on 06/03/2014
(2) 8.65 ft on 09/15/2013
(3) 7.94 ft on 06/13/2015
(4) 7.88 ft on 06/14/2010
(5) 6.84 ft on 06/10/2011
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.94 ft on 06/13/2015
(2) 8.73 ft on 06/03/2014
(3) 8.65 ft on 09/15/2013
(4) 2.10 ft on 07/08/2012
(5) 6.84 ft on 06/10/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:14
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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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
10 Extensive inundation of structures occurs along the Cache la Poudre River in and west of Greeley.
9.5 Most roads crossing the Cache la Poudre River are impassable. Water floods the sewage treatment plant and Island Grove Park in northeast Greeley.
9 Numerous houses and businesses along the Cache la Poudre River flood in northeast Greeley. There is also extensive flooding of roads crossing the river.
8.5 Multiple streets and roads crossing the Cache la Poudre River flood in and west of Greeley, including 85th Avenue.
7 The Cache la Poudre River floods 71st Avenue in northern Greeley. Lowland and trail flooding occurs along the river from Windsor through Greeley.
6 Sections of the Poudre River Trail begin to overtop from Windsor to Greeley.
5 There is minor overbank flow into low lying areas along the Cache la Poudre River between Windsor and Greeley.
About This Location Collapse

Latitude: 40.422700° N, Longitude: 104.677200° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 8.5 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 4636 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 Colorado Division of Water Resources
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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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