Water Supply Outlook for Alberta

May 2009

Water Supply Forecast as of May 1, 2009 - Milk River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2009
Locations Volume
in dam3
Volume as a % of Median Probable Range as a % of Median Potential Minimum as % of Median Forecast Ranking (lowest to highest) Recorded March-September 2008
Volume as a
% of Median
Milk River at
Western Crossing
42,500 78 69-87 41 25/70* 108
Milk River
at Milk River
61,900 65 57-73 33 27/91 78
Milk River at
Eastern Crossing
70,500 61 53-69 27 26/91 71


* Western Crossing data is from 1931-2001

Median is calculated for the March 1 to September 30 period from 1912 to 2001

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