The Climate Prediction Center, a division of the National Weather Service, now predicts a 60-percent chance of between 14 and 21 named storms, of which six to 11 could become hurricanes, and two to five of them major hurricanes. “It’s important for the public to remember that we’re very vulnerable out here on the East End,” East Hampton Town Supervisor Peter Van Scoyoc said. “Everybody needs to take steps ahead of any event to make sure that you’re ready.”