Warmist Andrew Freedman writes "the last time a major snowstorm like this one struck this region at this time of year was 1928", then suggests that global warming was the cause

Rare Late April Snowstorm Knocks Out Power in Northeast | Climate Central

Heavy snowstorms are unusual this late in the year. According to the National Weather Service (NWS), the last time a major snowstorm like this one struck this region at this time of year was 1928, although that storm brought more widespread accumulating snow than this one will.

...This storm, dubbed “Snowpril,” is reminiscent of “Snowtober,” when nearly 3 feet of snow fell in parts of New England. Both storms spun up at a time when trees have had their foliage, making them highly vulnerable to the weight of the wet snow.

Although it might seem as if a spring snowstorm is inconsistent with the effects of manmade global warming, precipitation extremes - both rain and snow - are already increasing in the Northern Hemisphere, since warmer air and sea surface temperatures cause more water vapor to be present in the atmosphere. This may tip the odds in favor of heavier snowstorms when temperatures are cold enough for snow. Even with a warming climate, temperatures cold enough for snow are expected to continue to occur.