Major Flood
11 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: LSLC2). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
9.5 ft
Minor Flood
8 ft
Action Stage
7 ft
What Floods at Each Level
10 ft
Major flooding occurs along the reach.
9.5 ft
Moderate flooding occurs along the reach, mostly of agricultural lands.
8 ft
Farm and ranch lands flood. Minor flooding in Milliken.
7 ft
The river is out of its banks and into fields and meadows.
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 |
|---|---|---|
| May 1, 1980 | 9.91 ft | 6,220 cfs |
| Apr 30, 1999 | 9.54 ft | 5,755 cfs |
| May 30, 1995 | 9.47 ft | 6,706 cfs |
About This Gauge
NWS LID
LSLC2
River
Big Thompson River (CO)
County
Weld, CO
Coordinates
40.3507°N, 104.7837°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) near La Salle?
The Big Thompson River (CO) near La Salle gauge is maintained by USGS 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) near La Salle?
The NWS-defined flood stage for Big Thompson River (CO) near La Salle is 8 feet. Action stage begins at 7 feet. Moderate flooding starts at 9.5 feet, and major flooding at 11 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) near La Salle 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) near La Salle gauge located?
The gauge is located in Weld County, Colorado at coordinates 40.3507°N, 104.7837°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Big Thompson River (CO)
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Source & Notes
Data provided by: CO Division of Water Resources
- Stage may be affected by ice during winter months.