Water Supply Outlook for Alberta

August 2016

Water Supply Forecast as of August 1, 2016 - Oldman River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2016
Locations Volume in dam3 Volume as a % of Average Probable Range as a % of Average Potential Minimum as % of Average Forecast Ranking (lowest to highest) Recorded March-September 2015 Volume as a % of Average
St. Mary River 541,000* 81 79-83 77 20/99 79
Belly River 200,000 86 84-89 82 23/99 80
Waterton River 474,000 87 85-90 84 22/99 79
Oldman River near Brocket 640,000 65 62-68 60 12/99 79
Oldman River at Lethbridge 1,822,000 65 63-66 61 14/99 70

 

* - This value is the natural volume and includes the U.S. share

Average is calculated for the March 1 to September 30 period from 1981 to 2009

 
NOTE: There is: a 50% chance that the actual natural flow will fall within the probable range given; a 25% chance that the actual flow will be less than the lower bound of the probable range given; and a 10% chance that the actual natural flow will be less than the potential minimum. Actual day to day streamflow conditions may vary throughout the season as a result of the effects of streamflow diversion and reservoir storage.

For technical enquires about this web page please contact Alberta Environment - Environmental Management Water Management Operations Branch at AENV-WebWS@gov.ab.ca