National Weather Service Advanced Hydrologic Prediction Service

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This probabilistic forecast is issued by the Missouri Basin River Forecast Center.

	Hydrograph			River at a Glance			Download			Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

About this graph

Forecasts for the Milk River near Harlem are issued as needed during times of high water, but are not routinely available.

Return to Area Map

Upstream Gauge

Downstream Gauge

Zoom Level:17

Flood Categories (in feet)

Major Flood Stage:	25
Moderate Flood Stage:	23
Flood Stage:	21
Action Stage:	20
Low Stage (in feet):	-9999

Historic Crests
(1) 25.73 ft on 09/29/1986
(2) 25.61 ft on 03/11/1987
(3) 24.46 ft on 04/22/2018
(4) 24.08 ft on 03/28/1978
(5) 23.88 ft on 03/18/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 23.80 ft on 04/12/2023
(2) 24.46 ft on 04/22/2018
(3) 11.19 ft on 05/28/2012
(4) 23.46 ft on 06/11/2011
(5) 20.34 ft on 06/26/2010
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

	Gauge Location	Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
25.5	Flooding of homes in Harlem and Chinook.
24	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	Escape routes for livestock may be cut off.
22.5	Flooding of approximately 4,000 acres of irrigation land.
22	Flooding of culverts and some county bridges. 2,000 acres of irrigated land flooded.
21	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.
Photos (1) Milk River near Harlem beneath Hwy 2 Bridge from gauge house (2) Milk River near Harlem looking downstream from Hwy 2 Bridge (3) Milk River near Harlem looking upstream from Hwy 2 Bridge

Other Real-time and/or Archive Data Sources:

U.S. Geological Survey (USGS) Data and Site Info for Harlem

Additional Information

Gauge readings available seasonally. Data unavailable during winter months.

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

NWS Information

National Weather Service
Great Falls Weather Forecast Office
5324 Tri-Hill Frontage Rd
Great Falls, MT 59404-4933
(406) 453-2081
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Page last modified: 2-Nov-2020 7:28 PM

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