Water Supply Outlook for Alberta

July 2014

Water Supply Forecast as of July 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 922,000* 137 133-142 128 86/99 105
Belly River 293,000 126 122-131 118 81/99 109
Waterton River 719,000 131 127-137 123 79/99 93
Oldman River near Brocket 1,515,000 154 150-161 146 85/99 148
Oldman River at Lethbridge 4,110,000 146 141-150 138 87/99 120

 

* - 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