A low pressure system tracked from the southern Appalachians into western New York State Tuesday February 12th into Wednesday February 13th, while a secondary low pressure system developed south of Long Island by Wednesday afternoon, before tracking northeast off the northern New England coast by Wednesday evening.
This complex storm system initially brought a significant wintry mix to much of east central New York and adjacent western New England Tuesday evening into Wednesday morning. As milder air moved north, heavy rainfall occurred across much of the region, with 1 to 3 inches of rainfall reported. This heavy rainfall, combined with clogged storm drains from antecedent heavy snow and sleet, and snowmelt led to widespread ponding of water across the region Wednesday afternoon and evening.
In addition, flooding was reported along portions of the East Aspetuck River near New Milford. This flooding resulted in three road closures, including Welles Road and Merryall Road.