Low Flow Forecast Updates Use Current Flow Data

The low flow forecasts below are based on current river flows.

cfs = cubic feet per second

Blackfoot River at Bonner updated August 18, 2008.

Assuming average precipitation the Blackfoot River should reach 700 cfs between August 25 and August 29.

Assuming below average precipitation, the Blackfoot River should reach 700 cfs between August 20 and August 25.

Assuming well below average precipitation, the Blackfoot River should reach 700 cfs between August 13 and August 20.

This year the river reached 700 cfs on August 17. Last year (2007) the river reached 700 cfs on July 23. This year the river receded to 2,000 cfs on July 14. Last year the river receded to 2,000 cfs on June 21.  This year the river receded to 1500 cfs on July 19. Last year the river receded to 1500 cfs on June 28. This year the river receded to 1000 cfs on July 30. Last year the river receded to 1000 cfs on July 8.

This is the final update for this year.

Big Hole River near Wisdom updated August 18, 2008.

Assuming average precipitation and normal management, the Big Hole near Wisdom should reach 20 cfs between August 28 and August 31.

Assuming below average precipitation and normal management, the Bighole near Wisdom should reach 20 cfs between August 25 and August 28.

Assuming well below average precipitation and normal management, the Bighole near Wisdom should reach 20 cfs between August 21 and August 25.

This year the river receded to 150 cfs July 11. Last year the river receded to 150 cfs June 16. This year the river receded to 60 cfs on August 5. Last year the river receded to 60 cfs June 21. This year the river receded to 40 cfs on August 15. Last year the river receded to 40 cfs June 22.

This is the final update for this year.

Big Hole River near Melrose updated August 25, 2008.

Assuming average precipitation and normal management, the Big Hole near Melrose should reach 200 cfs between September 5 and September 11.

Assuming below average precipitation and normal management, the Big Hole near Melrose should reach 200 cfs between August 31 and September 5.

Assuming well below average precipitation and normal management, the Big Hole near Melrose should reach 200 cfs between August 22 and August 31.

This year the river receded to 1000 cfs on July 20. Last year (2007) the river receded to 1000 cfs on June 24. This year the river receded to 500 cfs on August 4. Last year the river receded to 500 cfs on July 4. This year the river receded to 250 cfs on August 23. Last year the river receded to 250 cfs on July 30. Last year the river receded to 200 cfs on August 2.

The next update will be when the river recedes to 200 cfs.

Smith River near Fort Logan updated August 7, 2008.

Assuming average precipitation the Smith River near Fort Logan should reach 100 cfs between August 9 and September 3.

Assuming below average precipitation the Smith River near Fort Logan should reach 100 cfs between July 30 and August 24.

Assuming well below average precipitation the Smith River near Fort Logan should reach 100 cfs between July 15 and August 9.

This year the river receded to 100 cfs on August 6. Last year (2007) the river reached 100 cfs June 20.

Dearborn River near Craig updated September 2, 2008.

Assuming average precipitation and normal management, the Dearborn River near Craig should reach 40 cfs between August 24 and August 28.

Assuming below average precipitation and normal management, the Dearborn River near Craig should reach 40 cfs between August 20 and August 24.

Assuming well below average precipitation and normal management, the Dearborn River near Craig should reach 40 cfs between August 14 and August 20.

This year the river receded to 150 cfs on July 24. Last year (2007) the river receded to 150 cfs on June 26. This year the river receded to 80 cfs on August 14. Last year the river receded to 80 cfs on July 9. This year the river receded to 60 cfs on August 11. Last year the river receded to 60 cfs on July 19. This year the river receded to 40 cfs on August 18. Last year the river receded to 40 cfs on August 1.

This is the final update for this year.

Gallatin River near Gateway updated August 13, 2008.

Assuming average precipitation, the Gallatin River near Gateway should reach 500 cfs between September 1 and September 6.

Assuming below average precipitation, the Gallatin River near Gateway should reach 500 cfs between August 27 and September 1.

Assuming well below average precipitation, the Gallatin River near Gateway should reach 500 cfs between August 21 and August 27.

This year the river reached 500 cfs September 15. Last year (2007) the river reached 500 cfs July 22. This year the river receded to 1500 cfs on July 24. Last year the river receded to 1500 cfs on June 21. This year the river receded to 1000 cfs on July 31. Last year the river receded to 1000 cfs on June 29. This year the river receded to 800 cfs on August 12. Last year the river receded to 800 cfs on July 5.

This is the final update for this year.

Jefferson River near Twin Bridges updated July 31, 2008.

Assuming normal management and average precipitation, the Jefferson River near Twin Bridges should reach 400 cfs between August 10 and August 15.

Assuming normal management and below average precipitation, the Jefferson River near Twin Bridges should reach 400 cfs between August 4 and August 10.

Assuming normal management and well below average precipitation, the Jefferson River near Twin Bridges should reach 400 cfs between July 27 and August 4.

This year the river receded to 2500 cfs on July 10. Last year the river receded to 2500 cfs on June 16. This year the river receded to 1500 cfs on July 14. Last year the river receded to 1500 cfs on June 22. This year the river receded to 1000 cfs on July 27. Last year the river receded to 1000 cfs on June 26. This year the river receded to 600 cfs on August 1. Last year the river receded to 600 cfs on July 5. Last year the river receded to 400 cfs on July 23.

The next update will be when the river recedes to 400 cfs.