Landed in New Jersey in the northeastern United States.

(1) The main factors affecting precipitation are land and sea position, mountain range trend, terrain type, ocean current, ground condition, pressure zone, wind zone, weather system and underlying surface condition.

(2) Mainly consider temperature and water vapor.

So the answer is:

(1) Most of the mountains in the United States are north-south, with low terrain in the middle. The flat and wide plains allow the cold air from the north to flow unimpeded and go south smoothly. The Appalachian Mountains in the east are low mountains, which have no blocking effect on snowfall.

(2) Affected by the Gulf Stream, the temperature is high and the water vapor is sufficient.