Note that two the storms you're referring to (Iselle and Julio) may have similar predicted paths, but they currently 1000 miles away from each other, and will definitely not merge. Iselle is already impacting Hawaii, while Julio will not approach for several days (assuming the current forecast verifies).
Both FTDNA and Ancestry sponsor groups or projects where people in the same haplogroup can exchange information and maybe even find an ancient connection. But Y-DNA and mtDNA are intended to check ancient bloodlines, 10,000-50,000 or so years ago. They are not generally useful by themselves for genealogy.
More about Haplogroups. Haplogroup is the term scientists use to describe individual branches, or closely related groups of branches, on the genetic family tree of all humans. All members of a haplogroup trace their ancestry back to a single individual.hen you first reach the Paternal or Maternal Line page, you will see a map and a brief history of your haplogroup. Click on the Haplogroup Tree tab to see yourself highlighted on the haplogroup tree: At the left edge of the tree is the common ancestor of all living people.