Water Supply Outlook for Alberta

April 2003

Table 2b - Water Supply Forecast as of April 1, 2003 - Milk River Basin (Natural Flows)

Volume Forecast for April 1 to September 30 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 2003 Volume as a % of Median Ranking (lowest to highest)
Milk River at
Western Crossing
31,100* 63 44-108 23 22/64** 403*** 57/64**
Milk River
at Milk River
49,800* 60 42-102 23 25/85 239*** 69/85
Milk River at
Eastern Crossing
57,400* 62 42-107 20 24/85 196*** 66/85

* NOTE: The forecast shown is the March to September 2003 forecast minus the recorded volume to date

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

** Western Crossing data is from 1931-95

*** Recorded 2003 natural volumes are preliminary and subject to change

Median is calculated for period 1912 to 1995

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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