Complex sentence: Continuing to strengthen, it reached Category 4 that afternoon, before weakening into a Category 1 by October 9, but restrengthened into a minimal major hurricane on October 11, and made landfall that day as a Category 2 near Puerto Charley.
Split into simpler sentences: Continuing to strengthen, it reached Category 4 that afternoon, before weakening into a Category 1 by October 9. However, it manged restrengthen into a minimal major hurricane on October 11, and made landfall that day as a Category 2 near Puerto Charley.