Oldman River Basin - Water Supply Forecasts

As of July 1, 2008, natural runoff volumes forecast for the March to September 2008 period are average for the Oldman River at Brocket and Lethbridge, slightly above average for the Waterton and St. Mary Rivers, and below average to average for the Belly River near Mountainview (Table 3a). Current forecasted values for the March to September 2008 period for the Oldman River at Lethbridge would rank 50th lowest in 91-years of record (1912-2001). Current natural runoff volume forecasts range from 94 to 106% of average.

The first four months of the forecast period have been completed, with March-June 2008 recorded natural runoff volumes being average, except average to above average for the Waterton River and below average to average for the Belly River. Recorded volume data is preliminary and is subject to change. The volume forecast for the remainder of the year is available in Table 3b. These July to September 2008 forecasts are for normal natural runoff volumes.