Complex sentence: Before the cyclone's arrival, a high pressure area situated north of New England funneled very cold air into the region; the air temperature at Albany, New York, on December 25 still holds the record for the city's coldest December temperature.
Split into simpler sentences: Before the cyclone's arrival, a high pressure area situated north of New England funneled very cold air into the region. The air temperature at Albany, New York, on December 25 still holds the record for the city's coldest December temperature.