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

Table 3

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

Month	First year	Last year	Number of years	Sen slope and significance
Maximum monthly temperature
November	1980	2013	34	0.044
December	1980	2013	34	0.089+
January	1980	2014	35	0.043
February	1981	2014	34	−0.024
March	1981	2014	34	0.038
Minimum monthly temperature
November	1980	2013	34	0.067
December	1980	2013	34	0.212
January	1980	2014	35	0.100
February	1981	2014	34	0.121
March	1982	2014	33	0.060
Direction of maximum wind gust
November	1980	2013	34	0.417
December	1980	2013	34	0.000
January	1980	2014	35	0.455
February	1980	2014	35	0.588
March	1980	2014	35	0.000
Speed of maximum wind gust
November	1980	2013	34	−0.250
December	1980	2013	34	0.000
January	1980	2014	35	0.000
February	1980	2014	35	0.000
March	1980	2014	35	0.000
Lake surface temperature for superior
November	1995	2015	21	0.040
December	1995	2015	21	0.022
January	1995	2015	21	0.049+
February	1995	2015	21	0.006
March	1995	2015	21	0.000

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