Complex sentence: The snow hurricane's impact in New York state was largely insignificant, though rain totals reached in New York City, while to the west in the Catskill Mountains, up to of snow accumulated, despite reports of fast-melting snow at Rochester.
Split into simpler sentences: The snow hurricane's impact in New York state was largely insignificant, though rain totals reached in New York City. Meanwhile, to the west in the Catskill Mountains, up to of snow accumulated, despite reports of fast-melting snow at Rochester.