Major Flood
11.5 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
11 ft
Minor Flood
10 ft
Action Stage
9 ft
What Floods at Each Level
12 ft
Extensive, life-threatening flooding occurs with roads crossing the Big Thompson River likely impassable. This level represents a flood that has a 1-percent chance of being equaled or exceeded in any given year. For more information click <a href="inundation/faq_google.php">here</a>.
11.5 ft
Widespread, major flooding occurs with many roads, homes and businesses impacted. This level represents a flood that has a 2-percent chance of being equaled or exceeded in any given year. For more information click <a href="inundation/faq_google.php">here</a>.
11 ft
Numerous streets along and bridges crossing the Big Thompson River in Loveland flood.
10.5 ft
Lincoln Avenue, Rossum Drive, 1st Street, Railroad Avenue, and the railroad tracks near the Big Thompson River are overtopped. This level represents a flood that has a 10-percent chance of being equaled or exceeded in any given year. For more information click <a href="inundation/faq_google.php">here</a>.
10 ft
Low lying roads along the river in Loveland begin to be impacted by flooding.
9 ft
The river overflows its banks in several areas including Barnes Park.
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 |
|---|---|---|
| Sep 12, 2013 | 11.93 ft | 19,000 cfs |
| Apr 29, 1999 | 10.48 ft | 4,960 cfs |
| Apr 29, 1980 | 10.1 ft | 6,970 cfs |
About This Gauge
USGS Site
NWS LID
BTLC2
River
Big Thompson River (CO)
County
Larimer, CO
Coordinates
40.3786°N, 105.0606°W
Get Flood Alerts for Big Thompson River (CO)
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 Big Thompson River (CO) at Loveland?
The Big Thompson River (CO) at Loveland gauge is maintained by USGS (site 06741510) 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 Big Thompson River (CO) at Loveland?
The NWS-defined flood stage for Big Thompson River (CO) at Loveland is 10 feet. Action stage begins at 9 feet. Moderate flooding starts at 11 feet, and major flooding at 11.5 feet.
How do I get alerts when Big Thompson River (CO) rises?
Download StormCast free on Google Play, go to River Gauges, and add Big Thompson River (CO) at Loveland 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 Big Thompson River (CO) at Loveland gauge located?
The gauge is located in Larimer County, Colorado at coordinates 40.3786°N, 105.0606°W. USGS site number: 06741510. 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
- Stage may be affected by ice during winter months.