Complex sentence: The agency declared Sandy post-tropical at 7 p.m. EDT (2300 UTC) that night, just offshore southern New Jersey, and about an hour later the storm made landfall approximately 5 miles (8 km) southwest of Atlantic City.
Split into simpler sentences: The agency declared Sandy post-tropical at 2300 UTC that night, while located just offshore southern New Jersey. Roughly an hour later, the storm made landfall approximately 5 mi (8 km) southwest of Atlantic City.