Minor Flood
4.3 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.
Action Stage
3.8 ft
What Floods at Each Level
4.3 ft
Lowland flooding below Mackay Dam through the Darlington Flats. US Highway 93 may be impacted at the curve by Leslie between 3900 North and 4050 North.
3.8 ft
Near bankfull from Mackay Dam through the Darlington Flats. Water is likely to start to seep in low-lying areas in the Darlington Flats.
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 5, 1986 | 6.08 ft | 2,990 cfs |
| Jun 16, 1974 | 5.93 ft | 2,790 cfs |
| Jun 13, 1965 | 5.89 ft | 2,640 cfs |
About This Gauge
USGS Site
NWS LID
MAKI1
River
Big Lost River
County
Custer, ID
Coordinates
43.9391°N, 113.6485°W
Get Flood Alerts for Big Lost 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 Big Lost River below Mackay Reservoir?
The Big Lost River below Mackay Reservoir gauge is maintained by USGS (site 13127000) 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 Lost River below Mackay Reservoir?
The NWS-defined flood stage for Big Lost River below Mackay Reservoir is 4.3 feet. Action stage begins at 3.8 feet. Moderate flooding starts at N/A feet, and major flooding at N/A feet.
How do I get alerts when Big Lost River rises?
Download StormCast free on Google Play, go to River Gauges, and add Big Lost River below Mackay Reservoir 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 Lost River below Mackay Reservoir gauge located?
The gauge is located in Custer County, Idaho at coordinates 43.9391°N, 113.6485°W. USGS site number: 13127000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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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.