Most weather apps base their numbers on if the snow was to land on the ground and stay how much would accumulate.
They dont factor in if it melts before hitting the ground or melts when it hits the ground.
Numbers get changed based on ground temperature and wind factors.
smugbox t1_jacnf59 wrote
I live very close to LGA and this doesn’t look like 2.7 inches to me at all. Haven’t been outside though