Consider this the spring training of severe weather season. These early spring convective setups are good training tools for when real severe season arrives.
A vigorous cold pool aloft characterized by temperatures as cold as -35°C to -36°C at the core is set to traverse southern New England during peak heating hours:
This feature will be associated with mid-level lapse rates potentially exceeding 8 C/KM which should help aid in upwards of several hundred J/KG of SBCAPE, despite cool surface temperatures. Wind shear will be supportive of organized updrafts. While moisture availability will not be very abundant, the combination of very steep mid-level lapse rates, adequate wind shear, and modest instability should support the development of scattered-to-numerous showers by early afternoon. Given degree of cold air aloft and potential for some mid-level rotation, grauple or small hail will be likely with the stronger updrafts. Gusty winds are likely as well. Activity will rapidly diminish towards evening as the cold pool exists.