Line graphs show annual values and corresponding 10-year running means of the Palmer Drought Severity Index from 1900 to 2007 for (a) Kamloops, British Columbia, (b) Saskatoon, Saskatchewan, (c) Sherbrooke, Quebec, and (d) Yarmouth, Nova Scotia. For all locations, there is considerable multi-year variability, with extended years of negative values (drier conditions) followed by extended years of positive values (wetter conditions) throughout the period. There are no discernible long-term trends.
{}