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Low Flow Forecasts

Low Flow Forecasts Use Measured Streamflows

The low flow forecasts below are generated with NRCS May - July streamflow volume forecasts for May 1, 2015 and measured flows during spring/summer runoff.

For questions on interpreting Low Flow Forecasts please contact Lucas Zukiewicz at (406) 587-6843

Blackfoot River near Bonner   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 510 430 375 315 235
Low Flow level will be near: CFS 518 483 459 433 398
             
Date Flows will reach 700 CFS   Very Early Early Normal Late Very Late
    7/6/15 7/18/15 7/26/15 8/4/15 8/16/15
             
             
South Fork Jocko near Arlee   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 30 26 24 22 18.9
Low Flow level will be near: CFS 20 18 15 12 5
             
    Very Early Early Normal Late Very Late
Date Flows will reach 60 CFS   7/7/15 7/13/15 7/18/15 7/23/15 7/30/15
             
             
Big Hole River near Wisdom   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 93 66 48 30 4
Low Flow level will be near: CFS 26 20 15 11 4
             
    Very Early Early Normal Late Very Late
Date Flows will reach 150 CFS   6/20/15 7/2/15 7/10/15 7/18/15 7/30/15
             
             
Big Hole River near Melrose   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 440 380 335 295 235
Low Flow level will be near: CFS 242 219 203 188 165
             
    Very Early Early Normal Late Very Late
Date Flows will reach 250 CFS   7/23/15 8/3/15 8/11/15 8/19/15 8/30/15
             
             
Jefferson River near Twin Bridges   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 515 355 250 140 20
Low Flow level will be near: CFS 381 266 191 113 27
             
    Very Early Early Normal Late Very Late
Date Flows will reach 600 CFS   6/28/15 7/12/15 7/21/15 7/30/15 8/13/15
             
             
Gallatin River near Gateway   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 310 265 240 215 172
Low Flow level will be near: CFS 455 435 423 412 392
             
    Very Early Early Normal Late Very Late
Date Flows will reach 500 CFS   7/9/15 7/19/15 7/26/15 8/2/15 8/12/15
             
             
Smith River near Fort Logan   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 115 88 69 50 23
Low Flow level will be near: CFS 80 68 60 52 40
             
    Very Early Early Normal Late Very Late
Date Flows will reach 100 CFS   5/31/15 6/19/15 7/1/15 7/14/15 8/1/15
             
             
Dearborn River near Craig   Very Wet Wet Normal Dry Very Dry
Given current forecast of: KAF 87 62 45 28 2
Low Flow level will be near: CFS 37 36 34 33 31
             
    Very Early Early Normal Late Very Late
Date Flows will reach 150 CFS   6/26/15 7/3/15 7/8/15 7/13/15 7/20/15