Complex sentence: Minimum pressure lowered to 987 mb, and the maximum winds increased to 100 mph causing Hernan to be upgraded to a Category 2 hurricane on the Saffir-Simpson Hurricane Scale.
Split into simpler sentences: Minimum pressure lowered to 987 mb, and the maximum winds increased to 100 mph. As a result, Hernan was upgraded to a Category 2 hurricane on the Saffir-Simpson Hurricane Scale.