The National Hurricane Center listed the chances of Tropical Depression Isaias's effects on a number of locations. Tropical storm speeds begin around 39 mph. 57 mph is an average tropical storm. 74 mph is a Category 1 hurricane. The odds are for sustained winds of a certain speed; gusts can be stronger.
File checked at 12:40 p.m. Eastern from the source file dated 4:43 a.m. Eastern Saturday, Oct. 10. The code to run this is freely available.