Oldman River Basin - Water Supply Forecasts

As of March 1, 2007, natural runoff volumes for the March to September 2007 period are forecast to be average for the Oldman and Waterton Rivers and below average to average for the Belly and St. Mary Rivers (Table 4). Current forecasted values for the March to September 2007 period for the Oldman River at Lethbridge would rank 46th lowest in 91-years of record (1912-2001). Current natural runoff volume forecasts range from 94 to 98% of average. In comparison to February 1 forecasts, this represents an increase of 1 to 5% of average. The March to September 2007 forecast volumes are 0 to 5% higher than those recorded during the same period last year for the Waterton, Belly and St. Mary Rivers and the Oldman River at Lethbridge, and 11% higher than last year for the Oldman River at Brocket.