Historical Spatiotemporal Trends in Snowfall Extremes over the Canadian Domain of the Great Lakes Basin

Table 4

Predictor variable trend analysis for each month of the cold season with corresponding years used in Sen slope calculation for Wiarton, Ontario.

Month	First year	Last year	Number of years	Sen slope and significance
Maximum monthly temperature
November	1980	2014	35	−0.032
December	1980	2013	34	0.062
January	1980	2014	35	0.125+
February	1980	2014	35	0.015
March	1980	2014	35	0.033
Minimum monthly temperature
November	1980	2014	35	0.027
December	1980	2013	34	0.156
January	1980	2014	35	0.000
February	1980	2014	35	0.065
March	1980	2014	35	0.200
Direction of maximum wind gust
November	1980	2011	32	0.000
December	1980	2011	32	−0.889
January	1980	2012	33	0.000
February	1980	2012	33	1.181
March	1980	2012	33	0.513
Speed of maximum wind gust
November	1980	2011	32	−0.472
December	1980	2011	32	−0.128
January	1980	2012	33	−0.725
February	1980	2012	33	−0.077
March	1980	2012	33	−0.296
Lake surface temperature for Huron
November	1995	2015	21	0.040
December	1995	2015	21	0.033
January	1995	2015	21	0.022
February	1995	2015	21	0.001
March	1995	2015	21	0.001

+, , and represent 90%, 95%, and 99% confidence levels, respectively.