Major Flood
9 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
7 ft
Minor Flood
6 ft
Action Stage
5 ft
What Floods at Each Level
10 ft
Extensive life-threatening flooding will occur along the Colorado River. U.S. Highway 34 floods north of Granby.
9 ft
Major flooding occurs with homes and businesses impacted. The railroad tracks at Windy Gap flood.
8 ft
Houses flood north of Granby.
7.5 ft
Agricultural and pasture lands are inundated. Debris in the river could block flows at bridges.
7 ft
Water flows over U.S. Highway 40 at Windy Gap. Road closures are expected.
6.5 ft
Floodwaters begin to impact secondary roads. Outbuildings flood north of Granby.
6 ft
Widespread lowland and meadow flooding occurs along the river.
5 ft
Water begins to overflow into low lying areas along the river.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jun 21, 1996 | 5.76 ft | 2,520 cfs |
| Jun 17, 2015 | 5.55 ft | 2,480 cfs |
| Jun 25, 2011 | 5.47 ft | 2,290 cfs |
About This Gauge
Get Flood Alerts for Colorado River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Colorado River near Granby?
The Colorado River near Granby gauge is maintained by USGS (site 09019500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Colorado River near Granby?
The NWS-defined flood stage for Colorado River near Granby is 6 feet. Action stage begins at 5 feet. Moderate flooding starts at 7 feet, and major flooding at 9 feet.
How do I get alerts when Colorado River rises?
Download StormCast free on Google Play, go to River Gauges, and add Colorado River near Granby to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Colorado River near Granby gauge located?
The gauge is located in Grand County, Colorado at coordinates 40.1208°N, 105.9000°W. USGS site number: 09019500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: U.S. Geological Survey, Observations courtesy of U.S. Geological Survey
- Gauge reading affected by reservoir operations.
- Stage data may not be available during winter months.