Top Florida utility officials said Tuesday increased intensity and unpredictability of hurricanes is making storm preparation more difficult — and expensive. Leaders of utility companies and associations representing municipal utilities and electric cooperatives made presentations to the Florida Public Service Commission as the six-month hurricane season gets ready to start June 1. Armando Pimentel, president and CEO of Florida Power & Light, and Archie Collins, president and CEO of Tampa Electric Co., said the greater unpredictability will cause utilities to take what Pimentel described as a …