The Frenchman Watershed (HUC 10250005) is located in north-eastern Montana and covers an area of approximately 2,200 km². The hydrology of the watershed is dominated by the Frenchman Creek, which is a tributary of the Missouri River. The watershed receives an average annual precipitation of around 330 mm, with snowmelt being a significant source of surface water. The specific snowpack in the watershed is highly variable but typically ranges from 20-50 cm in depth. The surface water in the watershed is used for irrigation and livestock watering, and the reservoirs are primarily used for irrigation storage. Interesting climatic facts in the watershed include the frequent occurrence of severe thunderstorms and hailstorms. There has been a trend of decreasing snowpack over the past few decades, which has implications for water availability in the watershed.