The last couple of summers have been exceptions and you have oddballs like 2011, but it’s frequent that this summer drought happens on the south shore. Without some kind of synoptic storm, it just doesn’t rain there this time of the year other than what can survive coming east from the city. I remember numerous summers growing up and watching MCS type structures collapse as soon as they reach JFK. Yesterday was a frontal boundary plus the sea breeze front but rain barely made it south of the LIE until well east in Suffolk where it collapsed anyway.