Major Flood
18.5 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
17 ft
Minor Flood
15.5 ft
Action Stage
15 ft
What Floods at Each Level
18.5 ft
Major, extensive flooding occurs as a wide expanse of the creek spreads out horizontally across the floodplain.
17.5 ft
Flooding affects large areas along the creek with numerous roads and structures impacted.
16.5 ft
There is significant flooding of agricultural land along the creek.
15.5 ft
Parks and agricultural fields and parks near the creek flood. Railroad tracks may be impacted.
15 ft
Water begins to overflow into the lowest areas adjacent to Saint Vrain Creek below its confluence with Boulder Creek.
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 8, 2015 | 14.56 ft | 5,080 cfs |
| May 17, 2017 | 13.44 ft | 3,130 cfs |
| May 31, 2014 | 12.97 ft | 2,300 cfs |
About This Gauge
USGS Site
NWS LID
SVLC2
River
Saint Vrain Creek
County
Boulder, CO
Coordinates
40.1605°N, 105.0079°W
Get Flood Alerts for Saint Vrain Creek
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 Saint Vrain Creek below Longmont?
The Saint Vrain Creek below Longmont gauge is maintained by USGS (site 06730525) 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 Saint Vrain Creek below Longmont?
The NWS-defined flood stage for Saint Vrain Creek below Longmont is 15.5 feet. Action stage begins at 15 feet. Moderate flooding starts at 17 feet, and major flooding at 18.5 feet.
How do I get alerts when Saint Vrain Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Saint Vrain Creek below Longmont 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 Saint Vrain Creek below Longmont gauge located?
The gauge is located in Boulder County, Colorado at coordinates 40.1605°N, 105.0079°W. USGS site number: 06730525. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Saint Vrain Creek
On This River
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice during winter months.