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Snowmelt Peak Streamflow Volume Forecast Table

2008 Snowmelt Peak Volumes.

Columbia River Basin
Watershed Peak Daily cfs Peak  as Percent of Average Average Daily Peak in cfs (1971 to 2000)
Bitterroot River near Darby 8680 159 5,454
Blackfoot River near Bonner 10100 119 8,512
Clark Fork River above Missoula 16800 114 14,698
Clark Fork River at St. Regis 45700 127 35,987
Clark Fork River below Missoula 35500 125 28,482
Fisher River near Libby 4760 204 2,334
Little Blackfoot River near Garrison 1020 91 1,115 **
Lower Willow Creek Reservoir Inflow 142 to 262 66 to 122 214
Middle Fork Flathead River near West Glacier 28300 148 19,126
Middle Fork Rock Creek near Phillipsburg 948 115 821
Nevada Creek near Helmville 252 84 301
North Fork Flathead River near Columbia Falls 21700 110 19,788
Prospect Creek at Thompson Falls 2640 217 1,219 **
Swan River near Big Fork 5880 119 4,929
Thompson River near Thompson Falls 4660 228 2,047 **
Tobacco River near Eureka 1650 119 1,388
Yaak River near Troy 8260 141 5,859

Missouri River Basin
Watershed Peak Daily cfs Peak as Percent of Average Average Daily Peak in cfs (1971 to 2000)
Badger Creek near Browning 1830 108 1,691
Big Hole River below Big Lake Creek at Wisdom 1540 98 1,566 **
Big Hole River near Melrose 6200 87 7,139
Boulder River near Boulder 1080 91 1,183E
Cut Bank Creek near Browning 998 116  857**
Clark Canyon Reservoir Inflow 945 79 1,191
Dearborn River near Craig 4470 263 1,697
Gallatin River near Gateway 5870 112 5,232
Gallatin River at Logan 6120 112 5,468
Gibson Reservoir Inflow 5469 71 7,697E
Jefferson River near Three Forks 8380 87 9,626E
Marias River near Shelby 4820 69 6,980
Middle Creek Reservoir Inflow 200 to 325 76 to 124 262E
Missouri River at Toston 17800 98 18,209
Musselshell River at Harlowton 640 49 1,293
North Fork Musselshell River near Delpine 20 to 60 45 to 122 49
Ruby Reservoir Inflow 1110 105 1,055
Sheep Creek near White Sulphur Springs 130 to 220 68 to 116 190
Musselshell River near Martinsdale 489 43 1,133E
Swift Reservoir Inflow 756 65 1,162E
Two Medicine River near Browning 1850    
Willow Creek Reservoir Inflow 199 93 215

Saskatchewan River Basin
Watershed Peak Range in Daily cfs Peak Range as Percent of Average Average Daily Peak in cfs (1971 to 2000)
Lake Sherburne Inflow 1070 63 1,694
St. Mary River at international boundary 3917 94 4,188

Yellowstone River Basin
Watershed Peak Range in Daily cfs Peak Range as Percent of Average Average Daily Peak in cfs (1971 to 2000)
Big Goose Creek near Sheridan Wyoming 560 to 1,120 98 to 195 574
Boulder River near Big Timber 5180 103 5,051
Clarks Fork River near Belfry 8850 117 7,554
Cooney Reservoir Inflow 220 26 831
Little Bighorn River near Hardin 1440 76 1,895
Little Goose Creek near Big Horn Wyoming 280 to 550 83 to 160 338
Mystic Lake Inflow 737 78 4,374
Powder River at Moorehead 5910 135 4,374
Shields River near Livingston 1790 92 1,940
Stillwater River near Absarokee 5660 92 6,129
Tongue River Reservoir Inflow 3380 106 3,199
Tongue River near Dayton Wyoming 1560 155 1,006
Yellowstone River at Billings 45700 110 41,617
Yellowstone River at Corwin Springs 20900 119 17,570
Yellowstone River at Lake outlet 7290 133 5,487
Yellowstone River at Livingston 25600 126 20,364

* Provisional data values and are subject to revision.
** Site has less than 30 years record -- average values are for period of record available.
E - Site has less than 30 years record -- average values are estimated 30 year averages.

NOTE: The low number in the flow range represents the maximum daily flow that would be expected to occur with little rainfall during the peak snowmelt period. The high number in the flow range could be expected with moderate amounts of rain about the same time as maximum snowmelt runoff is occurring.

Last Modified: 09/03/2008