Water Supply Outlook for Alberta

May 2007

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

Volume Forecast for May 1 to September 30, 2007 Year to date
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-April 2007 Volume as a % of Median Ranking (lowest to highest)
Milk River at
Western Crossing
23,800* 75 59-89 23 30/72** 83*** 30/72**
Milk River
at Milk River
38,900* 77 62-91 26 34/91 68*** 30/91
Milk River at
Eastern Crossing
43,200* 76 58-91 25 32/91 66*** 30/91

* NOTE: The forecast shown is the March to September 2007 forecast minus the recorded volume to date

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

** Western Crossing data is from 1931-2001

*** Recorded 2007 natural volumes are preliminary and subject to change

Median is calculated for period 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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