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.
Every surname from the British Isles probably has I2b1 haplogroups. A haplogroup search will tell you who you are not related to (If you are I2b1, you can not be genetically related to an R, Q, E or even an I1paternal yDNA line.), but that does not mean that every I2b1 can be proven related to all other I2b1s.enerally speaking, you may want to look for the surnames on your family tree to find your 23andme matches. If you took a yDNA test, you may want to look for Pierponts with your haplogroup. I hope this helps. Please let me know if you would like to join our WikiTree DNA Project.