Complex sentence: Although intensification briefly slowed, rapid deepening occurred from September 1 to the following day, when Anita peaked as a Category 5 hurricane with winds of 175 mph (280 km/h).
Split into simpler sentences: Although intensification briefly slowed, rapid deepening occurred from September 1 to September 2. Early on September 2, Anita peaked as a Category 5 hurricane with winds of 175 mph (280 km/h).