Table 2.

Historical changes in yearly persistence and maximum depth of snowpacks in the WPP (Environment Canada's Canadian Daily Climate Data database)

Site	Period	Days with snowpack, yr−1		Maximum snowpack
		Absolute change	% Change	Absolute change, cm	% Change
Fort Smith	1956–2003	−7.7	−3.6	N/S
Fort Chipewyan	1963–1993	N/S		N/S
Slave Lake	1971–2003	−39.0	−24.7	−26.8	−54.1
Banff	1956–2003	N/S		−32.3	−61.3
Calgary	1956–2003	6.3	4.4	N/S
Medicine Hat	1956–2003	−25.3	−23.1	−9.9	−38.1
Lethbridge	1962–2003	N/S		−18.3	−63.5
Prince Albert	1956–2003	−16.2	−9.4	−29.8	−52.4
Saskatoon	1956–2003	−23.3	−14.3	−10.4	−31.1
Regina	1956–2003	−24.0	−15.0	−32.4	−54.7

N/S, not significant.