Water Supply Outlook for Alberta

July 2016

Water Supply Forecast as of July 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 555,000* 83 76-89 71 20/99 79
Belly River 207,000 89 85-94 81 25/99 80
Waterton River 498,000 91 86-97 82 27/99 79
Oldman River near Brocket 673,000 68 64-76 60 13/99 79
Oldman River at Lethbridge 1,938,000 69 65-73 61 16/99 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