Complex sentence: When the two storms became more distant, Omar quickly intensified into a powerful typhoon, and on August 28 made landfall on Guam with winds of 195 km/h (120 mph).
Split into simpler sentences: When the two storms became more distant, Omar quickly strengthened into a powerful typhoon. On August 28, it made landfall on Guam with winds of 195 km/h (120 mph).