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Snowmelt Peak Streamflow Dates Forecast Table

Snowmelt Peak Streamflow Dates Forecast Table

The snowmelt peak dates below are predictions for the 2013 water year and are computed using May 13th, 2013, data. The dates below are predictions for snowmelt driven runoff and does not account for rain driven streamflow runoff occurring in the past, present or future. Peak date forecasts for streamflow points affected by upstream reservoirs were not calculated with known reservoir operations other than what has typically occurred in the past.

Columbia River Basin
Watershed Projected Snowmelt Peak Flow Date Range
Bitterroot River near Darby May 16 to 22
Bitterroot River at Missoula May 16 to 22
Blackfoot River near Bonner May 16 to 22
Clark Fork River above Missoula May 16 to 22
Clark Fork River at St. Regis May 16 to 22
Clark Fork River below Missoula May 16 to 22
Clark Fork River near Drummond May 19 to 25
Como Reservoir Inflow May 18 to 24
Fisher River near Libby May 13 to 19
Little Blackfoot River near Garrison May 15 to 21
Lower Willow Creek Reservoir Inflow May 14 to 20
Middle Fork Flathead River near West Glacier May 15 to 21
Middle Fork Rock Creek near Phillipsburg May 17 to 23
Mill Creek near Niarada May 11
Nevada Creek near Helmville May 15 to 21
North Fork Flathead River near Columbia Falls May 15 to 21
Prospect Creek at Thompson Falls May 14 to 20
South Fork Flathead River above Twin Creeks May 15 to 21
South Fork Jocko River near Arlee May 14 to 20
Swan River near Big Fork May 16 to 22
Thompson River near Thompson Falls May 14 to 20
Tobacco River near Eureka May 14 to 20
Yaak River near Troy May 14 to 20

Missouri River Basin
Watershed  Projected Snowmelt Peak Flow Date Range
Badger Creek near Browning May 15 to 21
Big Hole River below Big Lake Creek at Wisdom May 16 to 22
Big Hole River near Melrose May 16 to 22
Boulder River near Boulder May 16 to 22
Clark Canyon Reservoir Inflow May 18 to 24
Cut Bank Creek near Browning May 16 to 22
Dearborn River near Craig May 15 to 21
Gallatin River near Gateway May 25 to 31
Gallatin River at Logan May 25 to 31
Gibson Reservoir Inflow May 16 to 22
Hebgen Reservoir Inflow May 14 to 20
Hyalite Reservoir Inflow May 28 to June 3
Jefferson River near Three Forks May 16 to 22
Lima Reservoir Inflow May 14 to 20
Madison River near West Yellowstone May 14 to 20
Marias River near Shelby May 16 to 22
Missouri River at Toston May 17 to 23
Musselshell River at Harlowton May 15 to 21
Musselshell River near Martinsdale May 15 to 21
North Fork Musselshell River near Delpine May 18 to 24
Ruby Reservoir Inflow May 15 to 21
Sheep Creek near White Sulphur Springs May 16 to 21
Smith River below Eagle Creek near Fort Logan May 16 to 21
Swift Reservoir Inflow May 15 to 21
Two Medicine River near Browning May 15 to 21
Willow Creek near Harrison May 20 to 26

Saskatchewan River Basin
Watershed Projected Snowmelt Peak Flow Date Range
Lake Sherburne Inflow May 18 to 24
St. Mary River at International Boundary May 20 to 26

Yellowstone River Basin
Watershed Projected Snowmelt Peak Flow Date Range
Boulder River near Big Timber May 28 to June 3
Big Goose Creek near Sheridan Wyoming May 27 to June 2
Clarks Fork River near Belfry May 24 to 30
Cooney Reservoir inflow May 30 to June 5
Little Bighorn River near Hardin May 24 to 30
Little Goose Creek near Bighorn Wyoming May 24 to 30
West Rosebud near Roscoe June 1 to 7
Powder River at Moorehead May 24 to 30
Shields River near Livingston May 19 to 25
Stillwater River near Absarokee May 30 to June 5
Tongue River at Dayton Wyoming May 21 to 27
Tongue River Reservoir Inflow May 25 to June 1
Yellowstone River at Billings May 27 to June 2
Yellowstone River at Corwin Springs May 26 to June 1
Yellowstone River at Lake Outlet June 16 to 22
Yellowstone River at Livingston May 26 to June 1