Water Supply Outlook for Alberta

May 2014

Water Supply Forecast as of May 1, 2014 - Oldman River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2014
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 2013 Volume as a % of Average
St. Mary River 749,000* 112 97-127 83 57/99 105
Belly River 244,000 105 97-116 89 53/99 109
Waterton River 588,000 107 96-123 86 49/99 93
Oldman River near Brocket 1,009,000 102 92-126 82 46/99 148
Oldman River at Lethbridge 3,071,000 109 97-120 87 57/99 120

 

* - 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