Water Supply Outlook for Alberta

May 2007

Table 3a - Water Supply Forecast as of May 1, 2007 - Milk River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2007
Locations Volume
in dam3
Volume as a % of Median Probable Range as a % of Median Reasonable Minimum as % of Median Forecast Ranking (lowest to highest) Recorded March-September 2006
Volume as a
% of Median
Milk River at
Western Crossing
41,100 76 67-84 45 28/72* 76
Milk River
at Milk River
64,500 68 60-75 41 35/91 59
Milk River at
Eastern Crossing
76,700 66 58-74 41 29/91 62

Note: Click on the site Location to see the Water Supply Forecast graphically

Click here to see the table containing the remaining forecast for the season along with the recorded volume to date

* 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 reasonable minimum. Actual day to day streamflow conditions may vary throughout the season as a result of the effects of streamflow diversion and reservoir storage.

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