Abstract
Abstract Areal extents of monthly and seasonal North American snow cover were correlated with precipitation totals, precipitation frequency, and severe weather associated with the North American monsoon. Significant relationships were found to exist between monsoon variables and snow-cover extent over western North America. Synoptic composites of the summertime atmosphere revealed that during years of low snow-cover extent, 500-mb heights were higher across much of the United States and 850-mb specific humidity values were increased over the desert southwest compared with high snow-cover extent years. Seemingly, displacement of the 500-mb ridge across the United States displaces the Four Corners high, which in turn affects the strength of low-level moisture advection into the southwestern United States. In beginning to assess the possibility of anticipating the strength of the North American monsoon using winter and spring snow-cover extent, data for anomalously large and small snow-cover years (50% of th...
Published Version
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