Major Flood
25 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
23 ft
Minor Flood
21 ft
Action Stage
20 ft
What Floods at Each Level
25.5 ft
Flooding of homes in Harlem and Chinook.
24 ft
Possible flooding of homes and streets in harlem and chinook.Notes: In April 2018, the Chinook water plant was surrounded by water. The water was stopped on the south/west side of the city of Chinook by the roads. Harlem was near 24 feet at the time. Fort Belknap had flooding eventually. Roads/homes were impacted. Harlem had all the flooding from 30 Mile Creek.
23 ft
Escape routes for livestock may be cut off.
22.5 ft
Flooding of approximately 4,000 acres of irrigation land.
22 ft
Flooding of culverts and some county bridges. 2,000 acres of irrigated land flooded.
21 ft
At 21 Feet...the Milk River near Harlem is bankfull. Some minor problems can occur near/along the river from Chinook to east of Harlem. Impacts start to go up quickly as the stage goes above 21 feet. (March 2017)Notes: In April 2018, river at Harlem was 24 feet, and the flooding came from 30 Mile 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 |
|---|---|---|
| Sep 28, 1986 | 25.73 ft | 13,900 cfs |
| Mar 10, 1987 | 25.61 ft | 1,320 cfs |
| Apr 22, 2018 | 24.46 ft | 7,521 cfs |
About This Gauge
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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 Milk River near Harlem?
The Milk River near Harlem gauge is maintained by USGS (site 06154100) 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 Milk River near Harlem?
The NWS-defined flood stage for Milk River near Harlem is 21 feet. Action stage begins at 20 feet. Moderate flooding starts at 23 feet, and major flooding at 25 feet.
How do I get alerts when Milk River rises?
Download StormCast free on Google Play, go to River Gauges, and add Milk River near Harlem 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 Milk River near Harlem gauge located?
The gauge is located in Blaine County, Montana at coordinates 48.4894°N, 108.7578°W. USGS site number: 06154100. 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