Low Flow Forecast Updates Use Current Flow Data

The low flow forecasts below are based on June 1, 2009, streamflow forecasts and measured streamflows at target flows.

cfs = cubic feet per second

Blackfoot River at Bonner updated July 24, 2009.

Assuming average precipitation the Blackfoot River should reach 700 cfs between August 16 and August 20.

Assuming below average precipitation, the Blackfoot River should reach 700 cfs between August 11 and August 16.

Assuming well below average precipitation, the Blackfoot River should reach 700 cfs between August 4 and August 11.

This year the river reached 700 cfs on August 24. Last year (2008) the river reached 700 cfs on August 17. This year the river receded to 2,000 cfs on July 4. Last year the river receded to 2,000 cfs on July 14. This year the river receded to 1,500 cfs on July 12. Last year the river receded to 1,500 cfs on July 19. This year the river receded to 1,000 cfs on July 24. Last year the river receded to 1000 cfs on July 30.

This is the final forecast for this season.

Big Hole River near Wisdom updated September 10, 2009.

Assuming average precipitation and normal management, the Big Hole near Wisdom should reach 20 cfs between September 21 and September 24.

Assuming below average precipitation and normal management, the Bighole near Wisdom should reach 20 cfs between September 18 and September 21.

Assuming well below average precipitation and normal management, the Bighole near Wisdom should reach 20 cfs between September 13 and September 18.

This year the river receded to 150 cfs on July 20. Last year (2008) the river receded to 150 cfs July 11. This year the river receded to 60 cfs on August 5. Last year the river receded to 60 cfs August 5. This year the river receded to 40 cfs on September 6. Last year the river receded to 40 cfs August 15.

This is the final forecast for this season..

Big Hole River near Melrose updated September 16, 2009.

Assuming average precipitation and normal management, the Big Hole near Melrose should reach 200 cfs between September 27 and October 3.

Assuming below average precipitation and normal management, the Big Hole near Melrose should reach 200 cfs between September 21 and September 27.

Assuming well below average precipitation and normal management, the Big Hole near Melrose should reach 200 cfs between September 13 and September 21.

This year the river receded to 1000 cfs on July 19. Last year (2008) the river receded to 1000 cfs on July 20. This year the river receded to 500 cfs on August 5. Last year the river receded to 500 cfs on August 4. This year the river receded to 250 cfs on September 15. Last year the river receded to 250 cfs on August 23.

This is the final forecast for this season.

Smith River near Fort Logan updated September 10, 2009.

This year the river receded to 100 cfs on August 21. Last year (2008) the river receded to 100 cfs on August 6.

This is the final forecast for this season..

Dearborn River near Craig updated July 23, 2009.

Assuming average precipitation and normal management, the Dearborn River near Craig should reach 60 cfs between August 3 and August 8.

Assuming below average precipitation and normal management, the Dearborn River near Craig should reach 80 cfs between July 28 and August 3.

Assuming well below average precipitation and normal management, the Dearborn River near Craig should reach 80 cfs between July 21 and July 28.

This year the river receded to 150 cfs on July 10. Last year (2008) the river receded to 150 cfs on July 24. This year the river receded to 80 cfs on July 22. Last year the river receded to 80 cfs on August 14. Last year the river receded to 60 cfs on August 11. Last year the river receded to 40 cfs on August 18.

The next update will be when the river recedes to 60 cfs.

Gallatin River near Gateway updated September 10, 2009.

Assuming average precipitation, the Gallatin River near Gateway should reach 500 cfs between August 21 and August 26.

Assuming below average precipitation, the Gallatin River near Gateway should reach 500 cfs between August 16 and August 21.

Assuming well below average precipitation, the Gallatin River near Gateway should reach 500 cfs between August 9 and August 16.

This year the river receded to 500 cfs on September 2. Last year (2008) the river receded to 500 cfs on September 15. This year the river receded to 1,500 cfs July 9. Last year the river receded to 1,500 cfs July 24. This year the river receded to 1,000 cfs on July 21. Last year the river receded to 1,000 cfs on July 31. This year the river receded to 800 cfs on July 31. Last year the river receded to 800 cfs on August 12.

This is the final update for this year.

Jefferson River near Twin Bridges updated July 24, 2009.

Assuming normal management and average precipitation, the Jefferson River near Twin Bridges should reach 600 cfs between August 14 and August 19.

Assuming normal management and below average precipitation, the Jefferson River near Twin Bridges should reach 600 cfs between August 9 and August 14.

Assuming normal management and well below average precipitation, the Jefferson River near Twin Bridges should reach 600 cfs between August 1 and August 9.

This year the river receded to 2,500 cfs on July 3. Last year (2008) the river receded to 2,500 cfs on July 10. This year the river receded to 1,500 cfs on July 20. Last year the river receded to 1,500 cfs on July 14. This year the river receded to 1,000 cfs on July 23. Last year the river receded to 1,000 cfs on July 27. Last year the river receded to 600 cfs on August 1.

The next update will be when the river recedes to 600 cfs.

Last Modified: 09/16/2009